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P-TCO Devices for USB-C™ Thermal Runaway Protection

Bourns' three different sensor models are designed to provide protection for six different temperature/current combinations

Image of Bourns' P-TCO-N and P-TCO-U Devices Bourns' family of polymeric thermal cutoff (P-TCO) devices is designed to protect USB-C cables from destructive and potentially dangerous thermal runaway events. The P-TCO family includes two series: the P-TCO-U series in a 1210 footprint and the P-TCO-N series in an ultra-compact 1206 footprint.

The USB Type-C™ connector features 24 pins in a smaller form factor than previous USB connector designs, and can deliver up to 100 W of power. There are clear benefits to these enhanced features and capabilities. The downside to this combination of increased power and extremely tight pin spacing is a heightened concern about safety hazards due to the possibility of thermal runaway triggered by dirt or liquid entering the connector and causing a short. The P-TCO model family from Bourns offers an effective combination of compact, ultra-low resistance thermal protection to guard against such potentially dangerous runaway events.

Each P-TCO series has a 12 V maximum operating voltage rating, a 50 A maximum operating current rating, and comes in three different models designed to provide protection for six different temperature/current combinations. The ultra-low resistance materials used in the P-TCO family enable both the P-TCO-U and the P-TCO-N series to achieve initial resistance values as low as 2 mΩ and post-trip resistance values as low as 14 mΩ, thereby allowing the devices to achieve current-carrying capabilities as high as 4.5 A.

Features
  • Surface-mount packaging for automated assembly
  • Small footprint sizes (1210 and 1206)
  • Low profile and symmetrical design for over-molding considerations
  • Ultra-low resistance
  • RoHS compliant and halogen free
  • UL and TUV recognized for safety requirements
Applications
  • Thermal runaway protection for USB-C cables
  • USB C-A, C-B, and C-C connector configurations
  • USB 2.0, 3.0, 3.1, and 3.2 protocols
  • Mobile device fast-charging port protection

P-TCO Devices

ImageManufacturer Part NumberDescriptionPackage / CaseAvailable QuantityView Details
POLYMERIC TCO, 1210, 12V/3.5AP-TCO-U350/12-2POLYMERIC TCO, 1210, 12V/3.5A1210 (3225 Metric), Concave2080 - ImmediateView Details
POLYMERIC TCO, 1210, 12V/4.0AP-TCO-U400/12-2POLYMERIC TCO, 1210, 12V/4.0A1210 (3225 Metric), Concave0View Details
POLYMERIC TCO, 1210, 12V/4.5AP-TCO-U450/12-2POLYMERIC TCO, 1210, 12V/4.5A1210 (3225 Metric), Concave3495 - ImmediateView Details
POLYMERIC TCO, 1206, 12V/3.5AP-TCO-N350/12-2POLYMERIC TCO, 1206, 12V/3.5A1206 (3216 Metric), Concave3469 - ImmediateView Details
POLYMERIC TCO, 1206, 12V/4.0AP-TCO-N400/12-2POLYMERIC TCO, 1206, 12V/4.0A1206 (3216 Metric), Concave0View Details
POLYMERIC TCO, 1206, 12V/4.5AP-TCO-N450/12-2POLYMERIC TCO, 1206, 12V/4.5A1206 (3216 Metric), Concave3480 - ImmediateView Details
Published: 2019-04-04