Temperature fuses
- Protection for lithium-ion batteries
- Certified protection components
- Compact design with high performance
Over 60 years of experience
in the electrical engineering and electronics industry
Short delivery times
through optimized warehousing
Germany and Switzerland
Dual location strength and reliability
Temperature fuses from Bourns
Mini-Breakers
| Series | AC, AD, HC, LC, NR, NX, SA, SCxxAAA, SCxxAAB, SD, SW |
| Technology | AC Series Breaker, AD Series Breaker, HC Series Breaker, LC Series Breaker, NR Series Breaker, NX Series Breaker, SA Series Surface Mount Breaker, SC Series Surface Mount Breaker, SD Series Breaker, Model SW70AAB Surface Mount Breaker |
Polymeric Thermal Cutoff Devices (P-TCO)
| Hold Current - I hold (Amps) | 350: 3.5 / 400: 4.0 / 450: 4.5 |
| Vmax | 12 Vdc |
| Thermal Cutoff (TCO) @ 3A (°C) | 350: 75 ± 20 / 400: 80 ± 15 / 450: 85 ± 15 |
| Thermal Cutoff (TCO) @ 2A (°C) | 350: 90 ± 15 / 400: 95 ± 15 / 450: 100 ± 10, 350: 90 ± 20 / 400: 95 ± 15 / 450: 100 ± 10 |
| R1max (Ω) | 0,01 - 0.022 |
Bimetal Thermostats
| Contact Ratings | 13A 125V AC, 12A 125V AC, 25A 125V AC, 20A 125V AC, 8A 125V AC, 4A 125V AC, 13A 26V DC, (5A 250V AC), 1A 125V AC, 16A 125V AC, 3A 125V AC |
| Cover | OPEN, DUST-PROOF, SEALED |
Reliable thermal fuses for electronics and battery protection
Thermal fuses are essential safety elements in modern electronic systems. They reliably protect sensitive components from overheating and thermally induced damage. If the temperature is too high, they specifically disconnect the circuit and thus prevent dangerous consequential damage - for example due to thermal runaway of batteries or overcurrent in charging electronics.
As an experienced distributor, ROTIMA offers high-performance solutions for a wide range of applications in close cooperation with the manufacturer Bourns. Whether lithium-ion battery packs, USB Type-C charging cables or compact devices such as tablets, notebooks and digital cameras - our thermal protectors ensure safety in the smallest of spaces. Mini-breakers and polymer-based TCOs with different tripping values are available.
With their compact design, the option of automated SMD assembly and international certifications such as UL and TÜV, they are ideal for series production. We will be happy to advise you on choosing the right protection solution.
As an experienced distributor, ROTIMA offers high-performance solutions for a wide range of applications in close cooperation with the manufacturer Bourns. Whether lithium-ion battery packs, USB Type-C charging cables or compact devices such as tablets, notebooks and digital cameras - our thermal protectors ensure safety in the smallest of spaces. Mini-breakers and polymer-based TCOs with different tripping values are available.
With their compact design, the option of automated SMD assembly and international certifications such as UL and TÜV, they are ideal for series production. We will be happy to advise you on choosing the right protection solution.
Compact thermal fuses with high switch-off capacity
SMD thermal fuses with UL and TÜV certificate
Our range of thermal fuses
Mini-Breakers
Polymeric Thermal Cutoff Devices (P-TCO)
Bimetal Thermostats
Thermal fuse for high currents in compact designs
Thermal fuses in electronics usually consist of heat-sensitive elements that interrupt the circuit when a defined temperature threshold is exceeded. In Bourns' mini-breakers, this is done mechanically by an internal bimetallic strip that deforms with heat and permanently disconnects the current flow. The P-TCO series, on the other hand, uses a polymer material that expands at overtemperature and drastically increases resistance.
Both variants have been specially developed for compact applications such as USB-C charging cables or battery packs and provide reliable, space-saving protection with high power density. The fuses can be reused after cooling down or power interruption.
Both variants have been specially developed for compact applications such as USB-C charging cables or battery packs and provide reliable, space-saving protection with high power density. The fuses can be reused after cooling down or power interruption.
Do you have any questions about our range of thermal fuses?
Our range of other circuit protection components:
Do you have any questions about our range of other circuit protection components?
Thermal fuses for thermal protection in the event of overcurrent
Thermal fuses are used in numerous electronic applications in which thermal safety plays a central role. A typical example is the protection of lithium-ion batteries in mobile devices such as smartphones, tablets or notebooks. Here, mini-breakers from Bourns prevent dangerous overheating by reliably interrupting the circuit at defined temperature thresholds.
Polymer-based P-TCO fuses also ensure the safety of modern USB-C charging cables. These detect thermal anomalies, such as damaged contacts or faulty charging currents, and interrupt the current flow before damage or fires occur.
Thermal fuses are also used in digital cameras, power banks, portable medical devices and cordless tools. Wherever high power density and compact designs are required, these components offer an effective and space-saving solution for overtemperature protection. Thanks to UL and TÜV certifications, they are ideally suited for international series products.
Polymer-based P-TCO fuses also ensure the safety of modern USB-C charging cables. These detect thermal anomalies, such as damaged contacts or faulty charging currents, and interrupt the current flow before damage or fires occur.
Thermal fuses are also used in digital cameras, power banks, portable medical devices and cordless tools. Wherever high power density and compact designs are required, these components offer an effective and space-saving solution for overtemperature protection. Thanks to UL and TÜV certifications, they are ideally suited for international series products.
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Temperature fuses
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Further information on thermal fuses
Thermal fuses are a key safety element in many modern electronic applications. Whether in battery packs, USB-C charging cables or compact control units - they ensure that sensitive components are reliably protected in the event of overheating. In our FAQ section, we answer the most frequently asked questions about how these protective components work, possible applications and selection criteria. This provides you with the most important information for your application quickly and concisely.
