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This Siemens SENTRON 5SY4 series miniature circuit breaker (MCB) is a 4-pole device designed for circuit protection. It features a 40A current rating and a Type B tripping characteristic, suitable for applications requiring tripping at 3 to 5 times the rated current, such as protection of generators or long cables.
The MCB operates at a rated AC voltage of 400V and has a breaking capacity of 10kA according to EN 60898. It is designed for DIN rail mounting and offers IP20 protection when conductors are connected. The device is halogen-free and sealable, with a mechanical service life of typically 20,000 switching cycles.
It supports conductor cross-sections from 0.75 mm² to 35 mm² solid and has screw-type terminals with a tightening torque range of 2.5-3 N·m. The unit's dimensions are 90mm height, 72mm width, and 76mm depth, with an installation depth of 70mm. It is suitable for use in mechanical engineering and industrial applications.
| 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 40A.
The tripping characteristic is Type B.
The rated AC voltage is 400V.
The breaking capacity is 10kA according to EN 60898.
It has 4 poles.
The IP rating is IP20 with connected conductors.
Type B tripping curves are used for the protection of generators, persons, and very long cables.