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Showing Results For: Thermal Fuses

Thermal Fuses

Thermal fuses or thermal cutoffs are safety devices designed to protect electrical appliances and equipment by detecting heat or temperature. These fuses are temperature-sensitive radial or axial switches, breaking or cutting off the circuit and electric flow. A thermal fuse only reacts to excessive temperatures compared to circuit breakers–responding to excessive currents or voltages. Cutoff fuses come with different temperature ratings ranging from 70°C (158°F) to 240°C (464°F) or higher. These ratings determine the temperature at which the fuse will open the circuit. Additionally, these one-time-use devices find applications in various household heat-generating appliances, industrial equipment, and electronics where temperature control and safety are paramount.

Why Buy a Thermal Fuse? Key Advantages to Users

Thermal fuses are an essential safety feature, preventing fires and other electrical accidents from overheating appliances. They protect valuable equipment, property, and individuals by preventing the appliances from continuing to operate when it gets too hot, which otherwise could lead to a fire or other safety issues. Other benefits of thermal fuses include:

  • They are easy to install and cost-effective.
  • Simple, compact, reliable, and versatile.
  • Fail-safe operation for extended periods.
  • Fast response time with high energy efficiency.

Operating Principle of Thermal Fuses:

Thermal fuses comprise a heat-sensitive element called a pellet that melts or deforms beyond a specific temperature threshold. These safety devices work based on the principle of thermal expansion. When the temperature in the device or equipment exceeds this preset limit, the pellet reacts by melting or deforming (called burning out or blowing out), interrupting the electrical circuit to break, and cutting off power to the device.

Resettable vs. Non-resettable or Single-Use Thermal Fuses: 

Thermal fuses come in either resettable or non-resettable forms. A resettable thermal fuse, often called a thermal protector, can return to its normal operating state once it cools down. On the other hand, non-resettable or single-use thermal fuses require replacement because they are no longer functional. 

Typical Applications of Thermal Fuses: 

Thermal fuses are typically installed in equipment or appliances requiring robust protection against heat or temperatures. These devices are critical in heat-producing appliances, including:

  • Coffee Makers
  • Microwave Ovens
  • Toasters
  • Hair or Machine Dryers
  • Space Heaters
  • Electronics
  • Automotive
  • Fire Alarms
  • Battery Packs
  • Refrigerators
  • Surge Protectors.

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Bourns
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AC85ABD, Bourns
2998 In Stock
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1000 +
£ 0.696
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P-TCO-N350/12-2, Bourns
3498 In Stock
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3500 +
£ 0.339
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P-TCO-U450/12-2, Bourns
3498 In Stock
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3500 +
£ 0.316
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SC77AAA, Bourns
10009 In Stock
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5000 +
£ 0.478
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P-TCO-U400/12-2, Bourns
7101 In Stock
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3500 +
£ 0.316
Bourns
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SC82AAA, Bourns
10011 In Stock
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5000 +
£ 0.478
Bourns
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SC82AAB, Bourns
4998 In Stock
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5000 +
£ 0.423
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P-TCO-N400/12-2, Bourns
3498 In Stock
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3500 +
£ 0.339
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SA72SB0, Bourns
10103 In Stock
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5000 +
£ 0.355
5000 +
£ 0.355
Bourns
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SC72AAA, Bourns
10007 In Stock
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5000 +
£ 0.478
Bourns
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SC85AAB, Bourns
10014 In Stock
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5000 +
£ 0.423
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P-TCO-U350/12-2, Bourns
3498 In Stock
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3500 +
£ 0.316
Bourns
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SA85SB0, Bourns
10006 In Stock
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5000 +
£ 0.355
Bourns
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SC72AAB, Bourns
10008 In Stock
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5000 +
£ 0.423
Bourns
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AC77ABD, Bourns
2998 In Stock
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1000 +
£ 0.696
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SA77SB0, Bourns
10104 In Stock
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5000 +
£ 0.355
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AC82ABD, Bourns
2998 In Stock
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1000 +
£ 0.696
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AC72ABD, Bourns
1998 In Stock
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1000 +
£ 0.696
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AC90ABD, Bourns
1998 In Stock
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1000 +
£ 0.696
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P-TCO-N450/12-2, Bourns
3498 In Stock
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3500 +
£ 0.339
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SC77AAB, Bourns
4998 In Stock
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5000 +
£ 0.423
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SA82SB0, Bourns
10005 In Stock
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5000 +
£ 0.355
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SC85AAA, Bourns
10013 In Stock
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5000 +
£ 0.478
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NIS6350MT2TXG, onsemi
2998 In Stock
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3000 +
£ 0.628
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NIS6150MT2TXG, onsemi
6010 In Stock
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3000 +
£ 0.474
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New Items
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EYP2BN109, Panasonic

EYP2BN109, Panasonic

Thermal Fuse, EYP Series Compact, insulated type with excellent thermal responsiveness.Can be mounted without insulation or protection even in cramped spaces. Undergoes minimal change over time; functions when an abnormality occurs, and does not reset. Formed by a proprietary flanging process, the lead has good mechanical strength and enables easy mounting.(axial lead type only) Product Specification Nominal operating temperature (Tf) Electrical Appliance and Material Safety Law: ±7°C UL, CSA, VDE, BEAB, CCC: –10°C Maximum holding temperature (Th) Temperature at which temperature fuse will not open even if supplied with rated current continuously for 168 hours Maximum temperature limit (Tm) Temperature at which temperature fuse, having opened, can withstand for 10 minutes without suffering damage or reconducting, while no force is applied to it Manufacturer's model number Nominal operating temperature Tf (°C) Maximum holding temperature Th (°C) Maximum temperature limit Tm (°C) Electrical rating EYP05BE138 139 115 / 250 V ac 110 /125 V ac 80 to 50 V dc 200 0.5 A / 250 V ac 1.5 A / 125 V ac 4 A / 50 V dc EYP05BE145 145 125 / 250 V ac 125 /125 V ac 95 to 50 V dc 200 0.5 A / 250 V ac 1.5 A / 125 V ac 5 A / 50 V dc EYP1BF115 115 90 / 250 V ac 90 /125 V ac 80 to 50 V dc 200 1 A / 250 V ac 2 A / 125 V ac 4 A / 50 V dc EYP1BF145 145 125 / 250 V ac 125 /125 V ac 95 to 50 V dc 200 1 A / 250 V ac 2 A / 125 V ac 5 A / 50 V dc EYP2BN109 114 90 / 250 V ac 86 /125 V ac 74 to 50 V dc 200 2 A / 250 V ac 3 A / 125 V ac 5 A / 50 V dc EYP2BN110 115 90 / 250 V ac 86 /125 V ac 74 to 50 V dc 200 2 A / 250 V ac 3 A / 125 V ac 5 A / 50 V dc EYP2BN134 139 110 / 250 V ac 100 /125 V ac 70 to 50 V dc 200 2 A / 250 V ac 3 A / 125 V ac 6 A / 50 V dc PCB Wire Ended Thermal fuses protect equipment against fire or thermal damage due to overload or overcharge. Suitable for use with standard single phase supplies up to 250V (230V typi...
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SF 139 R, Limitor

SF 139 R, Limitor

SF Series Thermal Fuse From Limitor, the SF Series of thermal cutoff limiters have a metallic body and feature a high Tm rating and quick responsiveness. These PCB non-resettable thermal fuses are suitable for use with standard single phase power supplies 250V (230V typical). Note Single Use/ Non Self Restarting Approvals VDE, SEV, UL PCB Wire Ended Thermal fuses protect equipment against fire or thermal damage due to overload or overcharge. Suitable for use with standard single phase supplies up to 250V (230V typical). Temperature gradient: 1°C per minute.
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A4-5AF, Limitor

A4-5AF, Limitor

Limitor AUPO Radial Thermal Fuses The AUPO thermal cut-off is an unresettable thermal protect instrument. Used in household appliances and industry these instruments are perfect for thermal protection. The AUPO thermal fuse comes in an all sealed structure that ensures stability and reliability. Extremely sensitive to ambient temperature Precise and stable functioning temperature Compact and reliable Epoxy sealed structure Approved by various international standards Features and Benefits PCB Wire Ended Thermal fuses protect equipment against fire or thermal damage due to overload or overcharge. Suitable for use with standard single phase supplies up to 250V (230V typical). Temperature gradient: 1°C per minute.
New items
SF 167 R, Limitor

SF 167 R, Limitor

SF Series Thermal Fuse From Limitor, the SF Series of thermal cutoff limiters have a metallic body and feature a high Tm rating and quick responsiveness. These PCB non-resettable thermal fuses are suitable for use with standard single phase power supplies 250V (230V typical). Note Single Use/ Non Self Restarting Approvals VDE, SEV, UL PCB Wire Ended Thermal fuses protect equipment against fire or thermal damage due to overload or overcharge. Suitable for use with standard single phase supplies up to 250V (230V typical). Temperature gradient: 1°C per minute.
New items
AC85ABD, Bourns

AC85ABD, Bourns

The Bourns miniature thermal cut-off (TCO) device provides over temperature and overcurrent protection for lithium polymer and prismatic cells. It controls abnormal, excessive current virtually instantaneously, up to rated limits. High current capacity, low impedance
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P-TCO-N350/12-2, Bourns

P-TCO-N350/12-2, Bourns

The Bourns P-TCO-N series polymeric thermal cut-off device has ultra-low resistance. The small size enables fast response time to thermal runaway events. Compact, space-saving 1206 footprint Low profile and symmetrical design
New items
P-TCO-U450/12-2, Bourns

P-TCO-U450/12-2, Bourns

The Bourns P-TCO-U series polymeric thermal cut-off device has ultra-low resistance. The small size enables fast response time to thermal runaway events. Compact, space-saving 1206 footprint Low profile and symmetrical design
New items
NIS6350MT2TXG, onsemi

NIS6350MT2TXG, onsemi

The NIS6350 is a cost effective, resettable fuse which can greatly enhance the reliability of a USB application from both catastrophic and shutdown failures. It is designed to buffer the load device from excessive input voltage which can damage sensitive circuits and to protect the input side circuitry from reverse currents. It includes an overvoltage clamp circuit that limits the output voltage during transients but does not shut the unit down, thereby allowing the load circuit to continue its operation. 88 mΩ Max RDS(on) Increased efficiency Integrated Reverse Current Protection Adjustable Output Current Limit Protection with Thermal Shutdown Fast Response Overvoltage Clamp Circuit with Selectable Level Internal Undervoltage Lockout Circuit Digital Enable with Separate FLAG for Fault Identification Integrated Current Monitoring Both Latching and Auto−Retry Options Available NIV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements, PPAP Capable These Devices are Pb−Free, Halogen Free/BFR Free Applications Automotive Infotainment USB 2.0/3.0/3.1 VBUS USB Type−C PD Charging Solid State Drives Mother Boards
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SM 126 A0, Limitor

SM 126 A0, Limitor

SM Series Miniature ceramic body Note Single Use/ Non Self Restarting Approvals VDE, SEV, BEAB, UL, CSA PCB Wire Ended Thermal fuses protect equipment against fire or thermal damage due to overload or overcharge. Suitable for use with standard single phase supplies up to 250V (230V typical). Temperature gradient: 1°C per minute.
New items
P82 45 05100, Limitor

P82 45 05100, Limitor

P82 Series High thermal sensitivity - unnecessary to mount directly in windings Resets when temperature falls below operating point Body material impregnation proof and resistant to pressure, heat and most chemicals - suitable for encapsulation De-rate breaking capacity to 1·6A for reactive loads Note Multi-Use / Self Resetting Approvals VDE, SEV, BEAB, UL, CSA Approvals VDE, SEV, UL Pending PCB Wire Ended Thermal fuses protect equipment against fire or thermal damage due to overload or overcharge. Suitable for use with standard single phase supplies up to 250V (230V typical). Temperature gradient: 1°C per minute. Sorry Your request could not be completed at this time
New items
EYP2BN099, Panasonic

EYP2BN099, Panasonic

Panasonic Thermal Cutoffs EYP N Series Panasonic Thermal Cutoffs (TCO) are compact and insulated, featuring quick temperature response, and mountable in a small space without insulation or protection. Panasonic TCO open reliably when the equipment becomes abnormal, and are not resettable. PCB Wire Ended Thermal fuses protect equipment against fire or thermal damage due to overload or overcharge. Suitable for use with standard single phase supplies up to 250V (230V typical). Temperature gradient: 1°C per minute.
New items
LC85AY-1, Bourns

LC85AY-1, Bourns

Bourns LC, HC Mini-breaker. Product description: Bourns LC and HC mini breakers offer over temperature and overcurrent protection for lithium polymer and prismatic cells used in consumer appliance products. Mini-breakers have optimal corrosion resistant properties. The LC and HC series offers different trip temperatures. The innovative mini breaker enables a long battery life and high current draw and fast charge. Features and Benefits: Over temperature and overcurrent protection. Controls abnormal, excessive current instantaneously. Wide range of temperature options. Product Application Information: Battery cell protection for notebook and tablet pc's, smart phones and mobile phones. Surface Mount Technology Resettable fuses are designed for the protection of electrical and electronic circuits against excessive currents. They switch rapidly from a low resistance to very high resistance state under electrical overload or short circuit conditions, and feature automatic reset and return to low resistance state when fault condition ceases and power is removed. Maintenance free automatic reset for thousands of cycles Small size and no fuseholder required Main applications Security systems Power supplies and transformers Power switching devices Automotive and medical equipment Instrumentation and control Computers and peripherals Audio visual and telecommunications
FAQs
We offer free shipping for orders over £200 if delivery is in the UK. All other orders in the UK, shipping from £7.99 depending on the weight and measurement. Mainland Europe shipping charges start from £25. For all other countries shipping charges start from £50 for products like Thermal Fuses and all others.
You can email us directly at sales@enrgtech.co.uk or via our website for any queries regarding Thermal Fuses or any other product.
This depends on the Thermal Fuses individual product and information that can be found on our website.
Yes, we offer special discounts on orders above £200 for Thermal Fuses and all other products.
UK orders normally take between 2/3 working days. International orders normally take between 3/5 working days for all products including Thermal Fuses.
Yes. We keep updating our stock frequently and if a product like Thermal Fuses is not in stock then we will let you know.