| Category | |
| Manufacturer Name | |
| Actuator Type | |
| Approval Agency | |
| Current Rating (Amps) | |
| Depth | |
| Halogen Free | |
| Height | |
| Illumination | |
| Mounting Type | |
| Number of Poles | |
| Supply Voltage | |
| Voltage Rating | |
| Width |
The Siemens 5SJ4240-7HG42 is a 2-pole miniature circuit breaker from the 5SJ4 series, designed for reliable circuit protection in industrial and mechanical engineering applications.
This circuit breaker features a tripping characteristic class C and a rated operational current of 40A at 30°C, with a switching capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2. It supports AC/DC operation with a rated supply voltage of 400V AC and maximum operating voltages up to 277V AC and 125V DC (2-channel).
Constructed with halogen-free and silicon-free materials, it offers touch protection and is sealable. The device mounts on a standard DIN rail and has dimensions of 121mm height, 36mm width, and 70mm depth. It is suitable for environment B regarding EMC.
Key technical data includes an insulation voltage of 440V AC, a mechanical service life of 10,000 switching cycles, and a power loss of 4.8W per pole. It accommodates conductor cross-sections from 0.75mm² to 25mm² with a maximum tightening torque of 3.5 N·m.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The rated operational current is 40A at 30°C and 40°C.
The switching capacity is 10 kA according to EN 60898 and 15 kA according to IEC 60947-2.
The rated supply voltage is 400V AC, with maximum operating voltages of 277V AC and up to 125V DC.
It has 2 poles.
The tripping characteristic is Class C.
The protection class IP is IP20 with connected conductors, and IP40 in the handle range.
Yes, the product feature indicates it is halogen-free.