SG Series GDT Surge Arrester SMD 1812 Size

The SG Series GDT provides reliable protection from lightning-induced surges as well as ESD

Image of Littelfuse's SG Series GDT Surge Arrester SMD 1812 sizeThe SG Series from Littelfuse is a series of square GDT devices in a standard 1812 footprint (4.5 x 3.2 x 2.7 mm) designed for printed circuit boards that require surface mount technology. It has a high current handling capability of 1,000 A at 8/20µs. It is ideal for applications where nearby lightning strikes may create damaging fast-rising transients in the 100 V/µs to 1 kV/µs range. This threat is especially common in telecom and communications equipment, certain types of test equipment, power supplies, and broadband equipment. The new GDT reliably protects against ESD as well.


  • Wide voltage range options, from 75 VDC to 420 VDC
  • Square outline; 1812 SMD size
  • Excellent response to fast-rising transients makes it ideal for high-speed broadband applications
  • Excellent stability on multiple-pulse duty cycle offers strong protection
  • Low capacitance (<1 pF) preserves signal integrity
  • UL Recognized, lead-free and RoHS compliant

SG Series

ImageManufacturer Part NumberDescriptionAvailable Quantity
SG75 datasheet linkGDT 75V 2KA SURFACE MOUNTSG75GDT 75V 2KA SURFACE MOUNT18850 - Immediate
SG75 product page link
SG90 datasheet linkGDT 90V 2KA SURFACE MOUNTSG90GDT 90V 2KA SURFACE MOUNT6166 - Immediate
SG90 product page link
SG150 datasheet linkGDT 150V 2KA SURFACE MOUNTSG150GDT 150V 2KA SURFACE MOUNT4443 - Immediate
SG150 product page link
SG350 datasheet linkGDT 350V 1KA SURFACE MOUNTSG350GDT 350V 1KA SURFACE MOUNT17970 - Immediate
SG350 product page link
SG300 datasheet linkGDT 300V 1KA SURFACE MOUNTSG300GDT 300V 1KA SURFACE MOUNT7955 - Immediate
SG300 product page link
SG350Q datasheet linkGDT 350V 1KA SURFACE MOUNTSG350QGDT 350V 1KA SURFACE MOUNT4065 - Immediate
SG350Q product page link
SG400 datasheet linkGDT 400V 1KA SURFACE MOUNTSG400GDT 400V 1KA SURFACE MOUNT2107 - Immediate
SG400 product page link
SG230 datasheet linkGDT 230V 1KA SURFACE MOUNTSG230GDT 230V 1KA SURFACE MOUNT498 - Immediate
SG230 product page link
SG420 datasheet linkGDT 420V 1KA SURFACE MOUNTSG420GDT 420V 1KA SURFACE MOUNT50 - Immediate
SG420 product page link
Published: 2013-07-02