5SM2121-6

The SENTRON 5SM2121-6 residual current protection unit (RC unit) is a 2-pole design with a rated current of 16A and an operating sensitivity of 10mA. It adopts the Type A type and can detect AC and pulsating DC leakage current. It must be assembled with a 5SY miniature circuit breaker and is suitable for circuits with high leakage protection requirements.

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Siemens SENTRON 5SM2121-6 Residual Current Protection Unit 2P 16A 10mA Type A RC Unit

Product Positioning

The SENTRON 5SM2121-6 is a 2-pole leakage current protection unit from the Siemens SENTRON series. It can be combined with a 5SY miniature circuit breaker to provide Type A high-sensitivity leakage current protection with a rated operating current of 16A and 10mA.

Core Product Advantages and Features

Modular assembly design

It can be directly connected to the side of the 5SY series miniature circuit breaker to form a complete residual current circuit breaker, eliminating the need for additional wiring.

Type A Leakage Detection

It can detect AC leakage current and pulsating DC leakage current, and is suitable for circuits with high protection requirements.

10mA ultra-high sensitivity

With a rated operating leakage current of only 10mA, it provides more stringent protection against electric shock.

DIN rail mounting

Standard DIN rails allow for quick installation, saving internal space and construction time in the distribution box.

project	Specification
Rated current	16 A
Rated leakage current	10 mA
Leakage type	Type A
Extreme number	2P
Rated voltage	AC 230 V
Applicable host	SENTRON 5SY series miniature circuit breakers

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