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Externally triggered pyrotechnic fuse for high-voltage DC circuits. Fired by a signal from the management system, it severs the busbar in under 2 ms at any current, and self-triggers above 250 °C.
Used in high-voltage BMS, traction inverters, battery packs and energy storage capacitors — in electric vehicles, wind turbine converters and photovoltaic systems.
1000 V DC · 400 A on a 120 mm² busbar at 85 °C · 16 kA breaking capacity, no minimum breaking current · −40 °C to +85 °C · bolted M6, 6 ± 1 N·m.
CE marked, RoHS compliant, UL94-V0 flame rating. Qualified to LV124 and LV16.
Specifications
Brand
Sinofuse
Product family
Pyro Fuses
Series
SFH-400-C
Rated voltage
DC 1000 V
Current type
DC
Breaking capacity
16 kA @ DC 1000 V / 35 µH
Trigger type
External
Action time
≤ 2 ms
Trigger current
≥ 1.75 A / 0.5 ms or ≥ 1.2 A / 2.0 ms
Non-triggering current
≤ 0.4 A / 10 s
Allowable detection current
≤ 100 mA
Igniter resistance
1.7 to 2.3 Ω
Self-triggering temperature
≥ 250 °C
Mounting type
Bolted
Operating temperature range
−40 °C to +85 °C
Maximum altitude
5500 m
Flame retardant rating
UL94-V0
Reference standards
LV124 · LV16
Certifications
CE
RoHS compliant
Yes
Application sectors
Automotive, Wind energy, Photovoltaic, Energy storage
Typical applications
Short-circuit and overload protection for EV drive systems, power conversion systems, batteries, energy storage capacitors and inverters. Designed for high-voltage BMS applications. Rated current given for a 120 mm² busbar at 85 °C. Insulation resistance ≥ 100 MΩ between busbar and igniter, ≥ 50 MΩ between busbar and housing, ≥ 10 MΩ between busbar sections after break.
