Bourns delivers the most comprehensive line of circuit protection technology and solutions in the industry.

Gas Discharge Tubes

Light-Duty GDT

Buy Heavy-Duty GDTsHeavy-Duty GDTs

The GDTs are primarily targeted to telecom applications requiring ITU compliance but are suitable for use in many other applications. The GDTs are 3-electrode devices with a maximum 8/20 µs surge current rating of up to 30 kA. Model 2028 and 2046 are offered as a core package for cassette or radial leaded for through-hole applications. An optional Fail-Short mechanism is available for thermal runaway protection.

Features

  • Low capacitance and insertion loss
  • Fail-short option available
  • RoHS Compliant

Applications

  • Telecommunications equipment
  • Industrial equipment/electronics
  • Consumer electronics
Light-Duty GDT

Buy Light-Duty GDTsLight-Duty GDTs

Premium GDT surge arrestor devices are designed to meet selected performance requirements as specified in ITU K.12.

Features

  • High insulation resistance
  • Low capacitance
  • RoHS Compliant

Applications

  • Telecommunications equipment
  • Industrial equipment/electronics
  • Consumer electronics
Medium-Duty GDT

Buy Medium-Duty GDTsMedium-Duty GDTs

Premium GDT surge arrestor devices are designed to meet selected performance requirements as specified in ITU K.12.

Features

  • Size: 8 mm diameter, 6 mm length
  • High insulation resistance
  • Low capacitance
  • RoHS Compliant

Applications

  • Telecommunications equipment
  • Industrial equipment/electronics
  • Consumer electronics
Long Life GDTs

Buy Long Life GDTsLong Life GDTs

Long Life GDT surge arrestor devices are designed to meet or exceed GDT performance as specified in ITU K.12. These GDTs are available in heavy duty, medium duty and light duty versions and are targeted to customers requiring superior performance of end products over a longer service life. In addition to ITU K.12, some heavy duty long life GDT series are based on key considerations of RUS-80/IEEE 465.1, GR-1361/GR-974/1089 as well as ITU K.20/21.

Features

  • Balanced TRIGARD®
  • High surge current rating, low insertion loss
  • Stable breakdown throughout life
  • RoHS Compliant

Applications

  • Telecommunications
  • Industrial electronics
  • Commercial electronics
  • Consumer electronics
  • Automotive, aircraft, military electronics
High Voltage

Buy High VoltageHigh Voltage

High-voltage GDT devices are designed specifically for those customers and applications requiring a high level of isolation. This family of GDT is available with DC breakdown voltages ranging from 800 V to 6000 V.

Features

  • Surface mount device
  • High voltage range
  • Compact size
  • High insulation resistance

Applications

  • Telecommunications equipment
  • Industrial equipment/electronics
  • Consumer electronics
High Current

Buy High CurrentHigh Current

High-current GDT surge arrestor devices are designed to handle very large impulse discharge currents. Typically utilized in surge protective devices (SPDs), these GDTs have 8/20 μs impulse current ratings of 40-100 kA.

Features

  • High power handling
  • Low leakage
  • RoHS compliant

Applications

  • Telecommunications equipment
  • Industrial equipment/electronics
Fast GDTs

Buy Fast GDTsFast GDTs

Bourns line of Fast Acting GDT surge arrestor devices are designed specifically for use with the Bourns® TBU® High-Speed Protector (HSP). These GDT are designed to limit high rate of rise voltage transients to levels below the TBU® HSP peak voltage impulse rating (Vimp).

Features

  • Fast acting
  • Stable breakdown throughout life
  • Designed to operate with TBU® devices
  • RoHS compliant* versions available

Applications

  • Telecommunications
  • Industrial electronics
  • Avionics

LED Shunt Protectors

LSP LED Protection Devices

Buy LSP LED Protection DevicesLSP LED Protection Devices

Bourns's LSP ProductsBourns announces their line of open LED shunt protection devices designed specifically for LED lighting applications. Designated the Bourns® LSP-Series, the new shunt protector family enables LED lighting applications configured in strings to be more robust and reliable. Most LED designs include solid-state lighting luminaires configured in series strings of 20 or more LEDs. In this configuration, an open LED can cause the entire LED string to go dark, resulting in reduced performance and possible maintenance calls and costly warranty returns. Adding a Bourns® LSP-Series shunt protector to an LED design allows the unaffected lights in the string to remain illuminated by shunting current around the inoperable LED. The new LSP-Series of open LED shunt protectors is an optimal solution for a variety of LED lighting applications including light bulbs, lighting fixtures, and backlighting systems. Datasheet

Features

  • Fast switching
  • Automatic reset
  • SMB package
  • Suitable for industrial lighting environments
  • RoHS Compliant*
  • *RoHS Directive 2002/95/EC Jan 27, 2003 including Annex

Applications

  • LED streetlights
  • LCD backlighting
  • Display lighting
  • Intrinsically safe lighting

Multifuse® PPTC Resettable Fuses

MF-RM

Buy MF-RMMF-RM

Bourns® offers the MF-RM series of Multifuse® polymer PTC resettable fuses. This radial through-hole series is Bourns’ first family of PPTCs that can operate on an AC mains circuit of up to 240 VAC.

Bourns has launched this product family to assist consumer and industrial electronic manufacturers by offering a means to protect their AC circuits with a resettable overcurrent protection device.

The AC voltage rated MF-RM series has some unique features such as a UL-listed Vmax of 240 VAC, and a holding current of 50 mA to 550 mA.

Features

  • Radial leaded devices
  • Cured, flame retardant epoxy polymer insulating material meets UL 94V-0 requirements
  • Resettable circuit protection
  • RoHS compliant

Applications

  • Food blenders
  • Coffee machines
  • HVAC
  • Electric Fans
  • Blowers
  • AC adaptors
MF-MSMF

Buy MF-MSMFMF-MSMF

Features

  • Compliant with AEC-Q200 Rev-C- Stress Test Qualification for Passive Components in Automotive Applications
  • 100% electrically compatible with all previous generations of 1812 SMT devices
  • Compatible with Pb and Pb-free solder refl ow profiles
  • RoHS compliant

Applications

  • Overcurrent and overtemperature protection of automotive electronics
  • Hard disk drives
  • PC motherboards
  • PC peripherals
  • Point-of-sale (POS) equipment
  • PCMCIA cards
  • USB port protection - USB 2.0, 3.0 & OTG
  • HDMI 1.4 Source protection
MF-NSMF

Buy MF-NSMFMF-NSMF

Features

  • Compliant with AEC-Q200 Rev-C Stress Test Qualifi cation for Passive Components in Automotive Applications
  • Compact design to save board space - 1206 footprint
  • Small size results in very fast time to react to fault events
  • Symmetrical design
  • Low profile
  • RoHS compliant

Applications

  • USB port protection - USB 2.0, 3.0 & OTG
  • HDMI 1.4 Source protection
  • PC motherboards - Plug and Play protection
  • Mobile phones - Battery and port protection
  • PDAs / digital cameras
  • Game console port protection
  • Automotive electronic control modules
MF-PSMF

Buy MF-PSMFMF-PSMF

Features

  • Compact design to save board space - 0805 footprint
  • Small size results in very fast time to react to fault events
  • Symmetrical design
  • Low profile
  • RoHS compliant

Applications

  • USB port protection - USB 2.0, 3.0 & OTG
  • HDMI 1.4 Source protection
  • PC motherboards - Plug and Play protection
  • Mobile phones - Battery and port protection
  • PDAs / digital cameras
  • Game console port protection
MF-USMF

Buy MF-USMFMF-USMF

Features

  • Surface mount packaging for automated assembly
  • Small footprint size (1210) and low profile for space-constrained mobile applications
  • Ultra-low resistance
  • RoHS compliant

Applications

  • Thermal protection for Li-ion and polymer battery packs
  • Game consoles
  • PC motherboards
  • USB port protection - USB 2.0, 3.0 & OTG
  • Mobile phones
  • Digital cameras
MF-SMDF

Buy MF-SMDFMF-SMDF

Features

  • Very low profile
  • Very fast tripping time
  • High voltage
  • RoHS compliant* and halogen free
  • Symmetrical
  • 2018 footprint

Applications

  • Power Over Ethernet (IEEE 802.3 af) port protection
  • Automotive electronic control module protection
  • Telecom equipment low voltage protection
MF-FSMF

Buy MF-FSMFMF-FSMF

Features

  • Compact design to save board space - 0603 footprint
  • Small size results in very fast time to react to fault events
  • Low profile
  • RoHS compliant

Applications

  • USB port protection
  • HDMI 1.4 Source protection
  • Mobile phones - Battery and port protection
  • PDAs / digital cameras
MF-SM

Buy MF-SMMF-SM

Features

  • Compliant with AEC-Q200 Rev-C- Stress Test Qualification for Passive Components in Automotive Applications
  • Surface Mount Devices
  • Fully compatible with current industry standards
  • Packaged per EIA 481-2 standard
  • RoHS compliant

Applications

  • Computers & peripherals
  • General electronics
  • Automotive applications
MF-R

Buy MF-RMF-R

Features

  • Radial Leaded Devices
  • Cured, flame retardant epoxy polymer insulating material meets UL 94V-0 requirements
  • RoHS compliant

Applications

  • Computers & peripherals
  • General electronics
  • Automotive applications
MF-SD013/250

Buy MF-SD013/250MF-SD013/250

Bourns' MF-SD013/250 is a surface mount device containing twin 250V polymer PTC resettable fuses. This product builds on the very successful MF-SM013/250 device by packaging two of these devices into the same housing, reducing customer circuit board area by more than 50 percent.

The MF-SD013/250 provides tip and ring overcurrent protection and aids compliance with ITU-T K.20, K.21, and K.45 as well as Telcordia GR-1089 intra-building. The product can be used as part of an overall circuit protection solution utilizing a combination of other circuit protection products.

Features

  • Tip and ring line protection with two devices in one package
  • Surface mount device
  • High voltage surge capabilities
  • Assists in meeting ITU-T K.20/K.21/K.45 specifications as well as Telcordia GR-1089 intra-building

Applications

  • Customer Premise Equipment (CPE)
  • Subscriber Line Interface Cards (SLIC)
  • Central Office (CO)

TBU® High-Speed Protector (HSP)

TBU HSP

Buy TBU HSPLow-capacitance and high-speed surge protection

The TBU® device from Bourns is a silicon-based, solid-state, resettable device that is placed in series with a signal path. The TBU® (transient blocking unit) device operates in approximately 1 μs once line current exceeds the TBU® device’s trigger current. When operated, the TBU® device typically restricts line current to less than 1 mA. When operated, the TBU® device will block all system voltages and any other voltages including the surge up to rated limits.

After the surge, the TBU® device resets when the voltage across the TBU® device falls to the Vreset level. The TBU® device will automatically reset on lines that have no DC bias or that have a DC bias below Vreset (such as un-powered signal lines). If the line has a normal DC bias above Vreset, the voltage across the TBU® device may not fall below Vreset after the surge. In such cases, special care needs to be taken to ensure that the TBU® device will reset, otherwise an automatic or manual power down will be required.

Learn more.

Features

  • Superior circuit protection
  • Over-current and overvoltage protection
  • Blocks surges up to rated limits
  • High speed performance
  • Small SMT package
  • RoHS compliant

Applications

  • Ethernet ports
  • Protection modules and dongles
  • Process control equipment
  • Test and measurement equipment
  • General electronics
TBU Design Kits

Buy TBU Design KitsTBU Design Kits

Bourns® TBU® high-speed protectors are circuit protection devices constructed using MOSFET semiconductor technology. When placed in series in the system, the TBU® protector monitors the current flowing through the line. If the current exceeds a preset level, the TBU® device triggers, providing an effective barrier to large, destructive voltages or currents during surge events, thereby protecting sensitive electronics.

TVS Diodes

TVS Diodes

Buy TVS DiodesSMAJ/SMBJ/SMCJ/SMLJ

Bourns ESD, EFT, surge protection products are for general applications. The portable communications, computing, and video equipment markets are challenging the semiconductor industry to develop increasingly smaller electronic components. Bourns offers TVS diodes for surge and ESD protection applications in compact chip package size formats.

Bourns' chip diodes conform to JEDEC standards, are easy to handle with standard pick and place equipment, and their flat configuration minimizes roll-away.

Each of the series is RoHS compliant and complies with the following industry standards: IEC 61000-4-2 ESD (Min. Level 4), IEC 61000-4-4 EFT, and IEC 61000-4-5 Surge.

Learn more.

Features

  • Surface mount package
  • Standoff voltage: 5.0 to 170 V
  • Power dissipation: 400W (SMAJ), 600W (SMBJ), 1500W (SMCJ), 3000 W (SMLJ)
  • Available as either unidirectional or bidirectional
  • RoHS compliant

Applications

  • IEC 61000-4-2 ESD (Min. Level 4)
  • IEC 61000-4-4 EFT RoHS Compliant
  • IEC 61000-4-5 Surge

Metal Oxide Varistors (MOV)

MOV-07/10/14/20 Series

Buy MOV-07/10/14/20 Series MOV-07/10/14/20 Series

Bourns® MOV product portfolio offers 7, 10, 14, and 20 mm radial leaded varistor devices which protect against overvoltage transients such as lightning, power contact and power induction. The metal oxide varistors offer a choice of varistor voltages from 18 V to 1800 V and Vrms voltages from 11 V to 1100 V. The devices have high current handling, high energy absorption capability and fast response times to protect against transient faults up to rated limits.

Features

  • High voltage rating
  • High current rating
  • Bidirectional
  • Surge protection
  • Fast response time
  • RoHS compliant
  • Agency recognition

Applications

  • Power supplies
  • Power systems
  • Line voltage
  • Telecom systems
  • White goods/appliances

Power TVS Products

Power TVS

Buy Power TVSHigh Current Bidirectional Power TVS

Bourns is pleased to announce the release of the PTVS series of high current bidirectional TVS diodes designed for use in AC line protection and high power DC bus clamping applications. The use of silicon technology in the Power TVS products generally offers lower clamping voltage under surge than competing MOV technology. These devices offer bidirectional port protection from 58 volts to 470 volts in a through-hole package, and RoHS and UL compliancy while also meeting IEC 61000-4-5 8/20 μs current surge requirements.

Features

  • 3 kA, 6 kA, 10 kA, 8/20 μs surge capability
  • Low clamping voltage under surge
  • Bidirectional TVS
  • UL recognized

Applications

  • AC line protection
  • High power DC bus protection
  • RoHS Directive 2002/95/EC Jan 27 2003 including Annex and RoHS Recast 2011/65/EU June 8, 2011

TCS™ Transient Current Suppressor

TCS-DL Series

Buy TCS-DL SeriesTCS-DL Series

The TCS™ DL Series High-Speed Protector products contain dual, well-matched, low resistance, bidirectional, very high-speed Transient Current Suppressors. By limiting the maximum current to a safe level, a Bourns® TCS™ DL device offers superior protection for very high data rate differential lines against faults caused by short circuits, induction and lightning surges.

TCS™ High-Speed Protectors are typically used in conjunction with low capacitance TVS devices to form an extremely low let-through energy barrier to excessive voltages and currents during surge events which may cause damage to unprotected high-speed, low voltage driver and receiver components.

TCS™ High-Speed Protector is provided in a space-saving, surface mount DFN package meeting industry standard requirements such as RoHS and Pb Free solder refl ow profiles.

Features

  • High-speed performance
  • Superior overcurrent protection
  • Bi-directional
  • Low resistance
  • Excellent channel-to-channel resistance matching
  • Small SMT package
  • RoHS compliant*

Applications

  • VDSL and Ethernet ports
  • Protection modules and dongles
  • Process control equipment
  • Test and measurement equipment
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.

SinglFuse™ Thin Film Chip Fuse

Fast Acting Surface Mount Fuses

Fast Acting Surface Mount FusesFast Acting Surface Mount Fuses

The SinglFuse™ product line is designed to provide overcurrent protection for a wide range of circuits, and hence, the family is comprized of 70 different part numbers. These are offered in three industry standard sizes (0402, 0603, 1206).

Features

  • Single blow fuse for overcurrent protection
  • Fast-acting fuse
  • UL listed
  • RoHS compliant* and halogen free**
  • Thin film chip fuse
  • Surface mount packaging for automated assembly

Applications

  • Portable memory
  • LCD monitors
  • Disk drives
  • PDAs
  • Digital cameras
  • DVDs
  • Cell phones
  • Rechargeable battery packs
  • Battery chargers
  • Set top boxes
  • Industrial controllers
Slow Blow Surface Mount Fuses

Buy Slow Blow Surface Mount FusesSlow Blow Surface Mount Fuses

The SinglFuse™ product line is designed to provide overcurrent protection for a wide range of circuits, and hence, the family is comprized of 70 different part numbers. These are offered in three industry standard sizes (0402, 0603, 1206).

Features

  • Single blow fuse for overcurrent protection
  • Slow blow fuse
  • UL listed
  • RoHS compliant* and halogen free**
  • Thin film chip fuse
  • Surface mount packaging for automated assembly

Applications

  • Portable memory
  • LCD monitors
  • Disk drives
  • PDAs
  • Digital cameras
  • DVDs
  • Cell phones
  • Rechargeable battery packs
  • Battery chargers
  • Set top boxes
  • Industrial controllers

* RoHS Directive 2002/95/EC Jan 27 2003 including Annex

Design Kits and Eval Boards

RS-485 Interface Design Tool

Buy RS-485 Interface Design ToolCertified EMC Compliant RS-485
Interface Design Tool

Analog Devices and Bourns have partnered together to extend their offering of system oriented solutions by co-developing the industry’s first EMC-compliant RS-485 interface design tool that provides up to Level 4 protection levels for IEC61000-4-2 ESD (electrostatic discharge), IEC61000-4-4 EFT (electrical fast transients), and IEC61000-4-5 surge. With three different protection solutions on on board, the EVAL-CN0313-SDPZ board incorporates ADI’s ADM3485E, 3.3 V RS-485 transceiver with Bourns® TBU® High-Speed Protectors, TISP® Thyristor Surge Protectors, TVS Diodes, and Gas Discharge Tubes to provide a certified, time-saving starting point for your latest RS-485 design. The board provides engineers with design and integration files, device drivers, and evaluation hardware.

RS-485 Eval Boards

Buy RS-485 Eval BoardsRS-485 Eval Boards

Bourns presents two evaluation boards for RS-485-based applications. Using Bourns® TBU® High-Speed Protectors (HSPs), GDTs, TVS diodes and MOV products, the boards were developed as a design resource that streamlines evaluating circuit protection on RS-485 serial device ports. To meet the required industry standards on RS-485 port interfaces, the boards provide two different evaluation approaches. The Bourns® RS-485EVALBOARD1 includes two Bourns® TBU® High-Speed Protectors (HSPs), two Bourns® fast-acting GDTs and two Bourns® TVS diodes. The Bourns® RS-485EVALBOARD2 uses Bourns® TBU® High-Speed Protectors (HSPs), MOVs and TVS products.

TBU Design Kits

Buy TBU Design KitsTBU Design Kits

Bourns® TBU® high-speed protectors are circuit protection devices constructed using MOSFET semiconductor technology. When placed in series in the system, the TBU® protector monitors the current flowing through the line. If the current exceeds a preset level, the TBU® device triggers, providing an effective barrier to large, destructive voltages or currents during surge events, thereby protecting sensitive electronics.

PortNote Solutions

Buy PortNote SolutionsPortNote® Solutions

PortNote® solutions and design kits from Bourns provide engineers with an easy and effective way to see Bourns’ circuit protection devices in typical applications. Each PortNote® design kit contains enough Bourns® products to build five of the PortNote® solution circuits.

For the datacom market, Bourns created circuit protection design kits for common interfaces such as Ethernet, POE and USB. The design kits provide engineers with components for ESD, surges, and short circuits.

For the audio/video market, Bourns created circuit protection design kits for common media inputs such as HDMI and VHF/UHF coaxial. The PortNote® solution design kits provide circuit protection components for ESD and surges.

For the telecom market, Bourns created circuit protection design kits for common telecom interfaces such as ISDN, VDSL, T1/E1, and RJ11 ports. The PortNote® solution design kits give engineers the necessary components for assembling surge and power contact protected ports.

Applications

  • Datacom
  • Telecom
  • Audio/Video
  • Lighting
  • Batteries

Tools & Support

Datacom

Datacom Design Kits

CAN-bus - Surge Protection PN-DESIGNKIT-26
Ethernet - ESD Protection PN-DESIGNKIT-1
Ethernet - Power Over Ethernet (PoE) PD Solution PN-DESIGNKIT-34
Ethernet - Power Over Ethernet (PoE) PSE Solution PN-DESIGNKIT-35
IEEE 1394B - Firewire / iLink Protection PN-DESIGNKIT-25
RS-485 - Serial Port - ESD / EFT / Surge Protection PN-DESIGNKIT-22
SATA HDD Interface - Data and Power Protection PN-DESIGNKIT-28
USB 2.0 - ESD and Overcurrent Protection PN-DESIGNKIT-3
USB 3.0 - ESD and Overcurrent Protectio PN-DESIGNKIT-32
Ethernet - Power over Ethernet (PoE) Surge Protection PN-DESIGNKIT-44
Ethernet - Power Contact and Surge Protection PN-DESIGNKIT-45

 

Audio/Video

Audio/Video Design Kits

DisplayPort 1.2 - ESD & Overcurrent Protection PN-DESIGNKIT-31
HDMI 1.3 - ESD & Overcurrent Protection  PN-DESIGNKIT-11
HDMI 1.4 - ESD & Overcurrent Protection  PN-DESIGNKIT-12
HD-SDI / SDI - Coaxial Port PN-DESIGNKIT-27
LVDS - Input Port - Surge Protection PN-DESIGNKIT-15
LVDS - Output Port - Surge Protection PN-DESIGNKIT-16
Satellite Receiver RF Input - Surge Protection PN-DESIGNKIT-37
Thunderbolt™ Port - ESD and OC Protection PN-DESIGNKIT-33
VHF/UHF - Coaxial Port - ESD Protection PN-DESIGNKIT-5

 

Telecom

Telecom Design Kits

ISDN PN-DESIGNKIT-10
RJ11 Fax/Modem (FXO) PN-DESIGNKIT-8
RJ11 SLIC Protection - GR-1089-CORE Dual Supply Voltage PN-DESIGNKIT-7
RJ11 SLIC Protection - GR-1089-CORE Negative Voltage Tracking PN-DESIGNKIT-20
VDSL - Driver Side Protection PN-DESIGNKIT-36
VDSL - Line Side Protection PN-DESIGNKIT-18
VDSL - VDSL Over POTS PN-DESIGNKIT-19
SLIC Protection ITU-T Solution PN-DESIGNKIT-39
T1/E1 GR-1089-CORE PN-DESIGNKIT-40
Negative Battery Voltage SLIC Protection ITU-T Solution PN-DESIGNKIT-42
VDSL Over Pots ITU-T & GR1089-CORE Solution PN-DESIGNKIT-43

 

Lighting and Batteries

Lighting and Batteries Design Kit

LED PWM Dimmer - PWM / Power PN-DESIGNKIT-29
Li-ion Battery Controller Protection - Overcurrent and ESD Protection PN-DESIGNKIT-30