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Mini-Breakers (Miniature Thermal Cu​toff Devices)

Home / Products / Thermal Cutoff Devices (TCOs) / Mini-Breakers (Miniature Thermal Cutoff Devices)
Mini-Breakers (Miniature Thermal Cut Off Devices)
Specifications

Thermal Cutoff (TCO) devices, such as Bourns® Mini-Breakers, are utilized as safety measures to help prevent heat and fires produced by excess current, most notably in lithium-ion batteries. These products are used to safeguard batteries in electronic devices such as notebooks, PCs, tablets, digital cameras, and smartphones.

The trip temperature of the mini-breaker is a critical parameter for battery packs, and it is designed with the ability to target certain trip temperature values.

The component has UL and TÜV safety standard certifications and also uses environmental protection measures all around the globe. Bourns® Mini-Breakers are self-preserving devices that are intended to remain tripped (operated) at abnormal temperatures and then recover when power is turned off and the temperature returns to a safe level. When compared to polymer PTCs and temperature fuses used for the same applications, this enables protection at lower temperatures.

Obsolete Products marked with this symbol are currently available, although not recommended for new designs.

Product Series
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Series Photo Data Sheet Technology Description Design Files Engineering Buy Now
AA AA_part AA AA Series Breaker Model AA72AB0, AA77AB0, AA82AB0 and AA85AB0
Very High Current Series 		Downloads Buy
AC AC_part AC AC Series Breaker Model AC72ABD, AC77ABD, AC82ABD, AC85ABD and AC90ABD
Very High Current, Low Impedance Series 		Downloads Buy
AD AD AD Series Breaker Model AD Series
Axial Leaded (Weldable), High Current Series AEC-Q200-equivalent Compliant (meets Bourns internal AEC-Q200 equivalent test plan), Automotive Grade, +55 to +150 °C Trip Temperature 		Downloads Buy
HC Komatsulite™ HC Series Breakers HC HC Series Breaker Model HC72AY-1, HC77AY-1, HC82AY-1, HC85AY-1 and HC90AY-1
Standard Package / High Current 		Buy
(HC7)
Buy
(HC8)
Buy
(HC9)
LC Komatsulite™ LC Series Breaker LC LC Series Breaker Model LC72AY-1, LC77AY-1, LC82AY-1 and LC85AY-1
Standard Package / Low Current 		Buy
(LC7)
Buy
(LC8)
NR Komatsulite™ NR Series A-Type and C-Type Breaker NR NR Series Breaker Model NR72AB0, NR77AB0, NR82AB0, NR85AB0, NR72CB0, NR77CB0, NR82CB0 and NR85CB0
Miniature Package / High & Low Current 		Downloads Buy
(NR7)
Buy
(NR8)
NX NX NX Series Breaker Model NX77ABB, NX82ABB, NX85ABB, NX90ABB,
NX77A1B, NX82A1B, NX85A1B and NX90A1B
Miniature Package/High Current 		Downloads Buy
SA SA-S_part SA SA Series Surface Mount Breaker Model SA72SB0, SA77SB0, SA82SB0 and SA85SB0
Surface Mount / High Current 		Buy
SCxxAAA SCxxAAA_part SCxxAAA SC Series Surface Mount Breaker Model SC72AAA, SC77AAA, SC82AAA, and SC85AAA
Surface Mount w/1.07 ± 0.05 mm Body Thickness 		Downloads Buy
SCxxAAB SCxxAAB_part SCxxAAB SC Series Surface Mount Breaker Model SC72AAB, SC77AAB, SC82AAB, and SC85AAB
Surface Mount w/0.94 ± 0.05 mm Body Thickness 		Downloads Buy
SD SD SD Series Breaker Model SD Series
Surface Mount (SMD), High Current Series AEC-Q200-equivalent Compliant (meets Bourns internal AEC-Q200 equivalent test plan), Automotive Grade, +55 to +150 °C Trip Temperature 		Downloads Buy
SW Bourns Model SW Series SW Model SW70AAB Surface Mount Breaker Model SW70AAB
Surface Mount w/0.94 ± 0.05 mm Body Thickness/
Automatic Reset 		Downloads Buy
Model/Datasheet Photo MSL Soldering Profiles Packaging Label Terminal CofC 3rd Party Test Reports MDS China RoHS

Bourns® AA Series Mini-Breaker (Miniature Thermal Cutoff Device)

Bourns Protecting Li-Ion Batteries with Thermal Cut Off Devices

Overtemperature Protection for USB Type-C Cables

Training: Bourns® Mini-Breakers (Miniature Thermal Cut Off Devices)

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Usage


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Please visit the Thermal Cutoff Devices (TCOs) technical library for current publications.

We also offer online product training for Mini-breakers.

You may order one of our Mini-breaker design kits.

Have a look at the Mini-Breakers (SPICE, 3D, etc.) we have to offer. Choose "Circuit Protection, Mini-Breakers (Miniature Thermal Cutoff Devices)" from the drop down menu.

Conflict Mineral Source Reporting for Mini-breakers:

  • Mini-breakers (HC Series) CMRT
  • Mini-breakers (LC Series) CMRT
  • Mini-breakers (NR Series) CMRT
  • Mini-breakers (AA Series) CMRT
  • Mini-breakers (AC Series) CMRT
  • Mini-breakers (SA Series) CMRT
  • Mini-breakers (SC Series) CMRT
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