Analysis of JDT's Full Series of Self Recovering Fuses

Analysis of JDT's Full Series of Self Recovering Fuses
Shenzhen Jidiantong Industrial Co., Ltd., as a national high-tech enterprise in the field of circuit protection, has a matrix of self recovering fuses (PPTC) products covering two mainstream packaging forms: plug-in and patch, forming 12 core technology series. The current range is from 0.05A to 4A, and the voltage level covers 6V to 600V. It is widely used in strategic fields such as consumer electronics, industrial control, automotive electronics, and new energy. The following provides a comprehensive analysis of product architecture, technical features, and application scenarios in three dimensions:
1、 Product Architecture: Dual Packaging System+Three Major Technology Platforms
1. Plug in self-healing fuse series
2. Surface mounted self-healing fuse series
2、 Technical features: Five core advantages
Ultra wide current and voltage coverage
Plug in products achieve full voltage coverage from 60V to 600V, and surface mount products have a current accuracy of 0.05A, meeting diverse needs from IoT devices to industrial mother machines.
Fast response and recovery
Typical product action time ≤ 4 seconds, recovery time ≤ 10 seconds. For example, ASMD1812-400 cuts off within 4 seconds when there is 10A overcurrent, and automatically resets after troubleshooting.
Ultra low internal resistance design
The low internal resistance series (such as 0603SL) has a normal resistance as low as 0.005 Ω, which is 60% lower than the industry average and significantly reduces power consumption.
Environmental adaptability
The working temperature range is -40 ℃ to+85 ℃, and the storage temperature is -20 ℃ to+70 ℃. It has passed the AEC-Q200 vehicle specification certification (some models) and is suitable for extreme environments.
Safety and Environmental Protection
The entire series of products comply with RoHS and REACH standards, are lead-free and halogen-free, and have passed international safety certifications such as UL, VDE, TUV, etc.
3、 Technical analysis of benchmark models
ASMD1812-400 (SMT)
Parameters: 4A holding current, 7A triggering current, 6V/16V dual voltage version
characteristic:
Action power 2.0W, internal resistance 0.005 Ω (initial)/0.025 Ω (working for 1 hour)
Roll packaging (1000pcs/reel), supports reflow soldering and manual soldering
Application: USB hub, set-top box, game console port protection
A250-800 (plug-in type)
Parameters: 0.8A holding current, 1.6A triggering current, 250V withstand voltage
characteristic:
Action time ≤ 1 second, reset time ≤ 30 seconds
Yellow appearance, tin plated nickel copper pins, plastic bag packaging (500pcs/bag)
Application: Program controlled switches, security equipment, telephone line protection
ASMD2920-400 (patch type)
Parameters: 4A holding current, 8A triggering current, 16V withstand voltage
characteristic:
Action power 1.5W, internal resistance 0.008 Ω (initial)/0.04 Ω (working for 1 hour)
Roll packaging (1500pcs/reel), compatible with high-temperature solder
Applications: Power over Ethernet (POE), automotive electronic control modules, industrial control systems
4、 Industry Solution Matrix
In the field of consumer electronics
Solution: 0603/0805 series+low internal resistance SL series
Case: USB port protection for smartphones, with fault current limited to 1A to prevent motherboard burnout.
Industrial control field
Plan: A240 series+1812/2920 series
Case: PLC module overcurrent protection, 250V withstand voltage product can withstand motor start stop impact, reducing annual failure rate by 70%.
Automotive electronics field
Solution: A250 series+customized low internal resistance model
Case: Onboard OBC DC side protection, certified by AEC-Q200, capable of withstanding temperature differences from -40 ℃ to 125 ℃.
In the field of new energy
Solution: A600 series+high-voltage surface mount model
Case: DC terminal protection of photovoltaic inverter, 600V withstand voltage product to resist lightning surge, system MTBF increased by 3 times.
5、 Selection Guide and Technical Support
Core principles of selection
Current matching: Maintain the current at 1.2-1.5 times the working current of the load
Voltage derating: Actual operating voltage ≤ 80% of rated voltage
Temperature rise control: Models with a temperature rise coefficient of less than 0.1 Ω/℃ should be selected for high temperature scenarios
Customized services
Provide parameter customization (such as special packaging, non-standard current), material customization (such as high-temperature resistant polymers), and certification customization (such as automotive grade AEC-Q200)
R&D support
Free sample testing, circuit simulation, failure analysis, 72 hour rapid response mechanism
Jidian's self recovery fuse has become a benchmark solution in the field of circuit protection with its complete product system, leading technical indicators, and deep industry customization capabilities. Users can obtain personalized support through official selection tools or by contacting the technical team.