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| Automotive Grade | |
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| Halogen Free | |
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| Industrial Grade | |
| Medical Grade | |
| Military Grade | |
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The Siemens 5SJ4140-7HG42 is a 1-pole miniature circuit breaker from the 5SJ4 series, designed for reliable circuit protection in industrial and mechanical engineering applications. It offers a rated current of 40A and a tripping characteristic class C, suitable for various load types.
This circuit breaker features a high switching capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2. It supports AC/DC operation with a maximum operating voltage of 277V AC according to UL 489 and CSA C22.2 No. 5-02, and 60V DC. The device has an insulation voltage rating of 440V AC and a rated supply voltage of 400V AC at 50 Hz.
Constructed with halogen-free materials, the 5SJ4140-7HG42 ensures safety and environmental compliance. It has a mechanical service life of typically 10,000 switching cycles. The compact design measures 121 mm in height, 18 mm in width, and 70 mm in depth, fitting standard DIN rail mounting. Protection class is IP20 with connected conductors and IP40 in the handle range.
Key electrical specifications include a power loss of 4.8W per pole at rated current and AC operation. The terminals accommodate finely stranded conductors with core end processing from 0.75 mm² to 25 mm², with a maximum tightening torque of 3.5 N·m. It also provides touch protection and is sealable.
The rated operational current is 40 A at 30 °C and 40 °C, derating to 38.8 A at 45 °C, 37.6 A at 50 °C, 36.3 A at 55 °C, and 35.2 A at 60 °C.
The tripping characteristic is C.
The maximum AC operating voltage is 277 V; the maximum DC operating voltage is 60 V for single-channel use and 125 V for 2-channel use according to UL 489 and CSA C22.2 No. 5-02.
Switching capacity is 10 kA according to EN 60898 and 15 kA according to IEC 60947-2; short-circuit breaking capacity is 10 kA according to UL 1077 and CSA C22.2 No. 235.
The mounting type is DIN Rail.
Protection class is IP20 with connected conductors and IP40 in the handle range.
Yes, the datasheet indicates a halogen-free design.