5SJ4120-7HG42
Siemens
The Siemens 5SJ4120-7HG42 is a 1-pole miniature circuit breaker with a C-trip characteristic and a 20A operational current. It offers a switching capacity of 10kA according to EN 60898.
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This Siemens 5SJ4120-8HG42 is a 1-pole miniature circuit breaker designed for reliable circuit protection. It features a D-trip characteristic and a rated operational current of 20A at 30°C, with derating at higher temperatures. The breaker provides a switching capacity of 10kA according to EN 60898 and 15kA according to IEC 60947-2.
With an insulation voltage of 440V AC and a maximum operating voltage of 277V AC according to UL 489 and CSA C22.2 No. 5-02, this circuit breaker is suitable for various industrial and mechanical engineering applications. It operates on a 50 Hz supply voltage frequency and has a mechanical service life of typically 10,000 switching cycles.
The device is designed for DIN rail mounting and features touch protection. It supports conductor cross-sections from 0.75 mm² to 25 mm² with core end processing, and has a maximum tightening torque of 3.5 N·m for its screw-type terminals. The breaker is halogen-free and sealable, with dimensions of 121 mm height, 18 mm width, and 70 mm depth.
The rated operational current is 20 A at 30 °C and 40 °C.
The tripping characteristic is D.
The maximum operating voltage for AC operation is 277 V.
The rated switching capacity is 10 kA according to EN 60898.
The mounting type is DIN Rail.
The protection class is IP20, with IP40 in the handle range when connected.
Yes, the product is halogen-free.