5SJ4320-7HG42 Siemens Circuit Breaker 10kA Original Brand New


  • 5SJ4320-7HG42
  • Current Rating:20 A
  • Number of Poles:3 Pole
  • UPC Code:754554960098

Availability: 270 in stock

Siemens Circuit Breaker 10kA 5SJ4320-7HG42

MCBs from the Siemens SENTRON portfolio meet the enhanced requirements of automated buildings and industrial power supply systems, e.g. in the automotive and semiconductor industry or in data centers. Compared to residential and functional buildings, these are usually more extensive and complex in terms of both network topology and operation. Electricity and production downtimes must be deliberately prevented in these cases using coordinated device combinations if economic losses are to be avoided. Our MCBs protect wires and cables in cases of short circuit and overloads, and also enable backup protection for switching devices and also semiconductor protection. They are therefore a fundamental component in end-to-end protection concepts for industry and infrastructure.

The right combination

The main purpose of siemens circuit breakers is to permanently monitor and secure cables and wires in electrical systems. They also help protect humans against electric shocks when used in combination with RCCBs or as combined RCBO. Combining the 5SY MCB with the 5SM6 arc-fault detection unit (AFDD) further expands the range of functions. Breakers siemens overview of all the combinations is provided below.

Strengths of the Siemens Breakers in the SENTRON portfolio – your benefits

  • Convenient to install and connect
  • Uniform additional components
  • Consistent design
  • Ergonomically formed devices


Siemens 5SJ4320-7HG42, Circuit breaker 10kA, 3-pole, C, 20A according to UL 489-480Y/277V


DataSheet in PDF

Weight 0.498 kg
Dimensions 57.00 × 125.00 × 84.00 mm


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