Mini-Breakers (Miniature Thermal Cutoff 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

Parametric Table

RoHS Files

Collateral

Videos

Request Samples

Series	Technology	Description	Design Files	Buy Now
AA	AA Series Breaker	Model AA72AB0, AA77AB0, AA82AB0 and AA85AB0 Very High Current Series	Downloads	Buy
AC	AC Series Breaker	Model AC72ABD, AC77ABD, AC82ABD, AC85ABD and AC90ABD Very High Current, Low Impedance Series	Downloads	Buy
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	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	LC Series Breaker	Model LC72AY-1, LC77AY-1, LC82AY-1 and LC85AY-1 Standard Package / Low Current		Buy (LC7) Buy (LC8)
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 Series Breaker	Model NX77ABB, NX82ABB, NX85ABB, NX90ABB, NX77A1B, NX82A1B, NX85A1B and NX90A1B Miniature Package/High Current	Downloads	Buy
SA	SA Series Surface Mount Breaker	Model SA72SB0, SA77SB0, SA82SB0 and SA85SB0 Surface Mount / High Current		Buy
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	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 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	Model SW70AAB Surface Mount Breaker	Model SW70AAB Surface Mount w/0.94 ± 0.05 mm Body Thickness/ Automatic Reset	Downloads	Buy

Bourns Introduces its first AEC-Q200-equivalent Compliant Overtemperature Protection Mini-Breaker Devices that Broaden their Application Usage

Bourns Announces Three New Komatsulite Series of Mini-Breaker Overtemperature/Overcurrent Protectors for Battery-Operated Electronics

Bourns Mini-Breakers - Miniature Thermal Cutoff Devices (TCOs) Brochure

Model/Datasheet	Photo	MSL	Soldering Profiles	Packaging Label	Terminal	CofC	3rd Party Test Reports	MDS	China RoHS

File	Type	Size	Uploaded on	Download
Protecting High Speed Communication Ports	PDF	843.57 KB	28 May, 2015	Download

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https://www.youtube.com/embed/Nm_DJI66OI4

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Bourns AEC-Q200 Competency

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singlfuse-smd-fuses-aec-q200-compliant
tbu-high-speed-protectors-(hsps)-aec-q101-compliant
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transformers-power-aec-q200-compliant
transformers-signal-aec-q200-compliant
trimpot-trimming-potentiometers-aec-q200-compliant
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Bourns Magnetic Capabilities

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chip-beads
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chip-inductors-aec-q200-compliant
chip-inductors-multilayer
chip-inductors-wirewound
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j.w.-miller-through-hole-radial-lead-rf-chokes
j.w.-miller-through-hole-toroid-inductors
j-w-miller-smd-products
power-inductors-aec-q200-compliant
power-inductors-smd-dual-winding-shielded
power-inductors-smd-high-current-shielded
power-inductors-smd-non-shielded
power-inductors-smd-semi-shielded
power-inductors-smd-shielded
power-inductors-through-hole
power-magnetics-manufacturing-and-design
transformers-bms-aecq200
transformers-chip-lan
transformers-planar
transformers-power
transformers-power-aec-q200-compliant
transformers-signal
wirewound-chip-inductors-aec-q200-compliant
transformers-signal-aec-q200-compliant

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transformers-htc
chip-beads
chip-inductors-aec-q200-compliant
chip-inductors-common-mode
chip-inductors-wirewound
chip-inductors-multilayer
common-mode-chip-inductors-aec-q200-compliant
common-mode-chokes
custom-magnetics
common-mode-chokes-aec-q200-compliant
custom-special-inductor-and-cmc-worksheet
custom-special-power-transformer-worksheet
j.w.-miller-through-hole-common-mode-chokes
j.w.-miller-through-hole-axial-lead-rf-chokes
j.w.-miller-through-hole-ferrite-beads-emi-filters
j.w.-miller-through-hole-high-current-chokes
j.w.-miller-through-hole-radial-lead-rf-chokes
j.w.-miller-through-hole-toroid-inductors
j-w-miller-smd-products
power-inductors-aec-q200-compliant
power-inductors-smd-shielded
power-inductors-smd-semi-shielded
power-inductors-smd-non-shielded
power-inductors-smd-high-current-shielded
power-inductors-smd-dual-winding-shielded
power-inductors-through-hole
power-magnetics-manufacturing-and-design
transformers-bms-aecq200
transformers-chip-lan
transformers-planar
transformers-power
transformers-power-aec-q200-compliant
transformers-signal-aec-q200-compliant
wirewound-chip-inductors-aec-q200-compliant
transformers-signal

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Training: Bourns® GMOV™ Hybrid Overvoltage Protection Component

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

Mini-Breakers (Miniature Thermal Cu​toff Devices)