4-Channel Electronic Fuse (e-Fuse)
EFC-120
4-Channel Electronic Fuse (e-Fuse)
The EFC-120 is a 4-channel electronic fuse (e-Fuse) load switch with independent overcurrent limit control and real-time output current indication, compliant with IEC/EN 62368-1, IEC/EN 61010-1, IEC/EN 61010-2-201, UL 1310 (NEC Class 2), and IEC/EN 61000-6-2/6-3 standards. Each channel is separately protected so that overload or fault conditions on an individual load do not affect overall system reliability or function. The useful LED indicators show the output current and change from green to yellow (current within limit) to orange (current at limit) to red (overcurrent or short-circuit).
The EFC-120 is available with a 22–28 VDC input range and a regulated 24 VDC output, delivering up to 5 A per channel with a maximum rated output power of 120 W (4 × 30 W) and an efficiency of up to 98.6%. It features a 150% power boost for 5 s and can handle overloads above 150% for up to 100 ms to avoid nuisance tripping. Additionally, the 5A channels can be switched via DIP-switch to NEC Class 2 mode, limiting available power to below 100 W per channel (3.7 A) for LPS installations.
The channels power up in sequence to reduce the input inrush current, with a pre-settable delay time configurable via DIP-switch (5 ms or 200 ms). Under system overload conditions, the channels disconnect the loads in reverse sequence, keeping essential functions running to the last. The EFC-120 has a high design lifetime expectancy of >80,000 h at 40 °C and features tool-less push-in and lever-release terminals with paired input and output connectors for easy daisy chaining.
KEY FEATURES:
- Operating temperature: -40 °C to +70 °C at natural convection; design lifetime >80,000 h at 40 °C.
- Individual ON/OFF control and adjustable OCP limit (1.75 A–5.75 A in 5A mode) per channel via potentiometer.
- NEC Class 2 switchable via DIP-switch, limiting output to 3.7 A / 88.8 W per channel for LPS installations.
- Short circuit protection with 150% power boost for 5 s and tripping within 120 ms at hard short; hiccup or latching mode selectable.
- DC-OK contacts with remote fault reset and easy daisy chaining via paired push-in (+, −) connectors for tool-less wiring.
Product warranty
2 years
| Product reference | Rated intput voltage [VDC] | Rated output voltage [VDC] | Output Channels | Device Mode | Output Current per Channel [A] | Efficiency typ. [%] | Rated Output Power [W] |
|---|---|---|---|---|---|---|---|
| EFC-120-32405 | 22–28 | 24 | 4 | 5A Mode | 5 | 98.6 | 120 |
| EFC-120-32405 | 22–28 | 24 | 4 | NEC Class 2 | 3.7 | 98.6 | 88.8 |
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4-Channel Electronic Fuse (e-Fuse)EFC-120
