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This E-T-A 4120 series thermal circuit breaker features a single-pole design with a trip-free mechanism and manual push-pull actuation. It is rated for 20A and operates at 115VAC (300 Hz to 800 Hz) or 28VDC.
The breaker is temperature-compensated and suitable for panel mounting with an M12x1 threadneck. It includes a thermal characteristic curve M1, indicating a trip range of 1.15 to 1.4 times the rated current.
Typical applications include extra-low voltage wiring systems in vehicles for land, sea, and air. The unit is approved for commercial aircraft requirements and offers a typical life of 20,000 mechanical operations or 5,000 operations at 1x IN.
Key technical data includes an operating temperature range of -55°C to +125°C, an interrupting capacity of 1000A at 115VAC (400Hz) for 1-4A ratings, 2000A at 115VAC (400Hz) for 5-25A ratings, and 6000A at 28VDC. The degree of protection for the operating area is IP40.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The current rating is 20A.
It supports 115VAC and 28VDC.
This circuit breaker is designed for panel mounting.
The operating temperature range is -55°C to +125°C.
The interrupting capacity at 28VDC is 6000A.
Yes, it is available with auxiliary contacts (NC).