In depth analysis of FUZETEC's self recovery fuse product series
As a leading enterprise in the global circuit protection field, FUZETEC's self recovering fuse (PPTC) product matrix covers 12 major series, with current ranges from 0.05A to 375A and voltage levels ranging from 6V to 600V, which can meet the full range of needs in consumer electronics, industrial control, new energy vehicles, new energy generation, and other fields. The following analysis will be conducted from three dimensions: technical characteristics, core series, and application scenarios:
1、 Core technological advantages
Polymer PTC material patent
The independently developed positive temperature coefficient polymer formula achieves precise control of resistance temperature characteristics, with action time as low as milliseconds and reset time reduced to one-third of traditional products.Ultra low internal resistance design
The Low Rho series (such as FSMD1206-R) has a normal resistance of only 0.02 Ω, which is 40% lower than the industry average and significantly reduces power loss.Wide temperature range working ability
High temperature series (such as FRA series) support environments ranging from -40 ℃ to 125 ℃, and some industrial grade products have passed AEC-Q200 certification and can withstand extreme temperatures of 150 ℃.Composite protection function
Integrated overcurrent, overvoltage, and overtemperature triple protection mechanisms, such as the photovoltaic inverter specific model FUSB075F, can withstand 10/1000 μ s lightning surge.
2、 Technical analysis of benchmark models
FSMD075-1206-R (Consumer Electronics Preferred)
Parameters: Holding current 0.75A, operating current 1.5A, normal resistance 0.1 Ω
Features: 1206 ultra small package, certified by UL 1449, suitable for smartphones and TWS headphone charging cases.
FRA025-120F (for automotive electronics)
Parameters: Holding current 0.25A, operating current 0.5A, working temperature -40 ℃~125 ℃
Features: Compliant with AEC-Q200 standard, used for overcurrent protection of on-board OBC and ADAS sensors.
FUSB075F (in the field of new energy)
Parameters: Maintain current of 0.75A, withstand voltage of 120V, surge resistance of 10/1000 μ s
Features: Integrated TVS diode, tested according to IEC 62109 photovoltaic standard, applied to the DC side of inverters.
FSMD500-16-2920R (Industrial Control)
Parameters: Maintain current of 5A, action current of 10A, low impedance design (0.008 Ω)
Features: 2920 large size package, suitable for PLC modules and motor driver main circuits.
3、 Industry Solution Example
5G base station power protection
By adopting the FSMD series+SiC power semiconductor combination scheme, the dual protection of overcurrent/overvoltage in the -48V DC power supply system is achieved, and the fault recovery time is shortened to 5 seconds.
Medical wearable devices
Low voltage series (such as FHT050-30F) combined with flexible battery cells achieve 0.5A overcurrent protection within a thickness of 0.3mm, meeting biocompatibility requirements.Data Center PDU
The high temperature series plug-in product (FRX300-60F) has passed UL 94V-0 flame retardant certification and has stable operation for over 100000 cycles in a 45 ℃ cabinet environment.
4、 Selection Guide
Current matching: The current should be maintained at 1.5-2 times the working current of the load
Voltage derating: The actual operating voltage should be lower than 80% of the rated voltage
Temperature rise control: Models with a temperature rise coefficient of less than 0.1 Ω/℃ should be selected for high temperature scenarios
Certification priority: AEC-Q200 for automotive electronics, IEC 62109 for photovoltaics, IEC 60601 for medical applications
Fuzhi Technology has built a complete protection solution from component level to system level through continuous technological iteration. Its products not only lead the industry in terms of parameter performance, but also have passed certifications such as IATF 16949 and ISO 26262, providing reliable circuit safety guarantees for global customers.