Bourns' self-healing fuse (PPTC), with its unique material technology and design concept, has demonstrated multidimensional advantages in the field of circuit protection, which can be summarized as the following core directions:
1、 Self recovery mechanism: maintenance free and long-lasting reliability
Automatic reset function: Based on the positive temperature coefficient (PTC) characteristic, when the current is overloaded, the resistance rises sharply (up to one million times), instantly cutting off the circuit; After troubleshooting, it automatically restores to a low impedance state without the need for manual intervention, achieving "permanent protection".
Reusability: Can withstand thousands of overcurrent impacts while maintaining performance, significantly reducing equipment maintenance costs, especially suitable for scenarios with frequent switching or prone to transient overcurrent (such as automotive electronics, industrial control systems).
2、 Performance advantages: precise response and efficient energy saving
Quick response capability:
The action time reaches the microsecond level, quickly suppressing surge currents and preventing damage to sensitive components such as ICs and sensors.
Short recovery time (such as MFR series only takes a few seconds), ensuring the continuous operation efficiency of the equipment.
Low internal resistance design:
The typical resistance range is 0.04 Ω -1.29 Ω (such as MFR185 with a resistance as low as 0.04 Ω), reducing energy consumption during normal circuit operation and improving the battery life of battery powered equipment.
High voltage and pulse resistance:
Support voltage coverage of 30V-60V (such as MFR040 withstand voltage of 60V), withstand pulse current up to 40A, suitable for extreme working conditions such as car start stop and motor surge.
3、 Engineering adaptability: flexible selection and easy integration
Full scene series coverage:
|Series models | Core features | Typical application scenarios|
|MFUSML/X | High temperature stability (40 ° C~125 ° C) | Engine control module, high temperature industrial equipment|
|MFASML/X | Ultra low power consumption (resistance<0.1 Ω) | Portable devices, IoT sensors|
|MFFSMF/MFPSMF | High precision current tolerance (± 5%) | Medical instruments, precision power supplies|
|MFR radial lead | high current carrying capacity (40A) | power management, power tools|
Encapsulation compatibility:
Provide SMD mounting (such as 1812 and 1206 packages) and radial lead packaging, compatible with automated mounting processes, simplifying PCB design.
4、 Safety and reliability certification: meets strict standards
Multiple safety certifications: Passed UL 94V0 flame retardant certification, AECQ200 (vehicle specification), T Ü V, and CSA standards to ensure no fire risk in the event of short circuit/overload.
Environmental adaptability: The working temperature range is 40 ° C to+85 ° C, and some models support high temperature operation at 125 ° C (such as MFUSML/X), suitable for different climate regions around the world.
5、 Industry application value
Consumer Electronics: Provides overcurrent protection for mobile phones/laptops to prevent USB port short circuits from causing motherboard burnout.
Automotive Electronics: Protects ECU, sensors, and entertainment systems to meet automotive grade vibration and temperature requirements.
Industry 4.0: Defend against motor stalling current in PLC and servo drives to reduce production line downtime losses.
Green and energy-saving: Low resistance reduces energy loss and helps electronic devices achieve energy efficiency certification (such as Energy Star).
The core competitiveness of Burns' self-healing fuse lies in its closed-loop design of "intelligent protection+zero maintenance": based on PTC materials, it integrates fast response, low power loss, and full scene adaptability, becoming the preferred protection solution for high reliability electronic systems. Its technological advantages have been validated through the supply chain of leading companies such as Tesla, Huawei, and Apple, continuously driving the evolution of circuit protection towards efficiency and intelligence.