Application case analysis of FUZETEC self recovery fuse

Application case analysis of FUZETEC self recovery fuse
Case 1: Consumer Electronic Devices - USB Port Overcurrent Protection
Scene Description
During the charging process of a certain brand of smartphone, the USB port experienced a sudden surge in current due to the misuse of a non-standard charger by the user, resulting in a port burnout accident. Although traditional disposable fuses can cut off the current, they need to be disassembled and replaced, which damages the user experience.
Solution
Adopting the FUZETEC FSMD075-1206-R series self-healing fuse. This model has the following characteristics:
Quick response: Action time ≤ 1 second, can quickly enter a high resistance state when the current is abnormal, limiting the current to a safe range;
Low resistance design: The normal resistance is only 0.1 Ω, with almost no voltage drop, avoiding affecting charging efficiency;
Micro package: 1206 size (3.2 × 1.6mm) suitable for high-density circuit boards, saving space.
Implementation effect
The fault current is limited to within 0.75A to prevent port burnout;
After troubleshooting (such as replacing a compliant charger), the fuse automatically returns to a low resistance state without manual intervention;
The annual repair rate has decreased by 47%, and user satisfaction has increased.
Case 2: Industrial Control - PLC Module Overload Protection
Scene Description
The transient overcurrent generated by the motor start stop in the PLC module of a certain automated production line resulted in frequent module downtime, affecting production efficiency. Traditional fuses require shutdown for replacement, resulting in production capacity losses of tens of thousands of yuan per hour.
Solution
Choose the Fuzhi FUZETEC FRA050-120F series high-temperature self recovery fuse. Its technological advantages include:
Wide temperature operation: able to withstand environments ranging from -40 ℃ to 125 ℃ and adapt to temperature differences in industrial sites;
High voltage withstand: 120V rated voltage matched with PLC module working voltage;
Adjustable protection threshold: By connecting a parallel resistor network, the operating current is accurately set to 0.5A ± 10%.
Implementation effect
When overloaded, the impedance of the fuse instantly rises above 10 Ω, and the current is clamped at a safe value;
Automatic reset after fault recovery, reducing production line downtime by 90%;
The annual maintenance cost of a single device has been reduced by about 12000 yuan.
Case Three: New Energy Field - DC Side Protection of Photovoltaic Inverters
Scene Description
In distributed photovoltaic systems, the DC side of the inverter is prone to overcurrent due to lightning strikes or cable aging, and traditional fuses need to be manually replaced, resulting in high maintenance costs.
Solution
Adopting the FUZETEC FUSB075F series high current self recovery fuse. Core parameters:
Rated current: 0.75A (holding current), 1.5A (tripping current);
Heat dissipation optimization: using ceramic substrate packaging, with a thermal resistance as low as 5 ℃/W;
Surge resistance: Tested according to UL 1449 standard, it can withstand 10/1000 μ s lightning surge.
Implementation effect
Successfully resisted overcurrent events caused by multiple lightning strikes, reducing the inverter failure rate by 65%;
The automatic recovery function of the fuse reduces the frequency of on-site maintenance, saving over 20000 yuan in annual operation and maintenance costs for a single system;
Complies with the IEC 62109 photovoltaic safety standard and helps products pass CE certification.
Case 4: Automotive Electronics - Short Circuit Protection for On Board Chargers (OBC)
Scene Description
The OBC module of a new energy vehicle suffered from IGBT power device burnout due to a short circuit at the output terminal. After the traditional fuse was blown, the entire module needed to be replaced, resulting in high maintenance costs.
Solution
Integrated FUZETEC FSMD250-2920R series low impedance self recovery fuse. Technical highlights:
Low internal resistance: 0.02 Ω design, reducing power loss;
Quick circuit breaker: responds to short-circuit current within 2ms to protect backend devices;
AEC-Q200 certification: Meets vehicle grade reliability requirements.
Implementation effect
During a short circuit, the current is limited to within 25A to prevent IGBT overheating and failure;
Automatic recovery after troubleshooting, reducing single repair costs from thousands of yuan to zero;
By obtaining ISO 26262 functional safety certification, the overall vehicle safety level has been improved.
Application Summary
FUZETEC self-healing fuses solve industry pain points through the following core advantages:
Reliability: The action life exceeds 100000 times, far exceeding traditional fuses;
Flexibility: Provides 12 series including PTC, low voltage, high temperature, etc., covering a current range of 0.05A to 375A;
Cost effectiveness: The maintenance cost of a single failure is reduced by over 80%, and the total cost of ownership (TCO) of the equipment is significantly optimized.
From consumer electronics to industrial control, from new energy to automotive electronics, Fuzhi self-healing fuses, with their "adaptive protection+zero maintenance" characteristics, are becoming the preferred solution for circuit safety design.