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Bourns SE Breakers (Thermal Cut-Off Devices)

Bourns SE Breakers are miniature thermal cutoff (TCO) devices that control abnormal, excessive current virtually instantaneously up to rated limits. These surface-mount, small-footprint devices provide overtemperature and overcurrent protection and offer a wide range of temperature options. Bourns SE Breakers support the USB PD 240W (48V / 5A) specification and are ideal for use in USB Type C™ cables, smartphones, wearables, portable equipment, and more.

Features

  • Miniature TCO device
  • Surface mount, small footprint
  • Overtemperature and overcurrent protection
  • Controls abnormal, excessive current virtually instantaneously up to rated limits
  • Wide range of temperature options
  • High corrosion resistance
  • Supports USB PD 240W (48V / 5A) specification

Applications

  • Overtemperature protection
    • USB Type-C cables (240W maximum)
    • Smartphones
    • Notebooks
    • Heaters
  • Battery cell protection
    • Wearables
    • Portable equipment

Specifications

  • +72 ±5°C to +85 ±5°C trip temperature range
  • +40°C minimum reset temperature
  • 200mA maximum leakage current at +25°C maximum
  • 9VDC / 25A, 6000 cycles contact rating
  • 54VDC / 5A, 100 cycles maximum voltage
  • Minimum holding voltage
    • 3V at +25°C for 1 minute
    • 5V at +25°C for 1 minute
  • 5mΩ maximum resistance

Circuit Diagram

Schematic - Bourns SE Breakers (Thermal Cut-Off Devices)

Product Structure

Block Diagram - Bourns SE Breakers (Thermal Cut-Off Devices)

Dimensions

Mechanical Drawing - Bourns SE Breakers (Thermal Cut-Off Devices)
Publicado: 2026-01-12 | Actualizado: 2026-01-19