3RV2021-1FA15

The 3RV2021-1FA15 is a Siemens SIRIUS 3RV2021 motor protection circuit breaker with a housing size of S0, an adjustable current range of 3.5–5 amps, a tripping class of Class 10, and a built-in dual protection mechanism of thermal overload heating element and electromagnetic instantaneous trip. It is suitable for branch circuit starting protection of small motors.

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Siemens 3RV2021-1FA15 Motor Protection Circuit Breaker Product Image

Product Positioning

The 3RV2021-1FA15 belongs to the Siemens SIRIUS 3RV2021 series motor protection circuit breaker (case size S0). It features a knob-set adjustable current range of 3.5–5 amps and combines thermal overload and electromagnetic short-circuit tripping mechanisms for motor branch start protection.

Core Product Advantages and Features

Dual protection mechanism

Built-in thermal overload heating element combined with electromagnetic instantaneous trip trip, providing simultaneous protection against motor overload and short circuit faults within an adjustable range of 3.5–5 amps.

Knob-type current setting

The rotating dial on the panel allows for direct setting of the rated current, making installation and adjustment intuitive and quick, eliminating the need for additional calibration tools.

S0 standard enclosure dimensions

Featuring a SIRIUS 3RV2 series S0 housing design, it is compact and suitable for control panel configurations with limited space.

Built-in signal auxiliary contacts

By integrating 1NO+1NC auxiliary contacts, the circuit breaker switch status can be synchronously reported to the control circuit or monitoring system.

project	Specification
model	3RV2021-1FA15
Product Category	SIRIUS 3RV2021 Motor Protection Circuit Breaker (Motor Starting Protector)
Casing size	S0
Adjustable current range	3.5–5 A
Break away from level	Class 10
Protection type	Built-in thermal overload heating element + electromagnetic instantaneous trip short circuit protection
Auxiliary contacts	Built-in 1NO+1NC signal auxiliary contact
Current setting method	Front panel knob (rotary dial) settings
Terminal/wiring tools	For screw terminals, a size 2 Phillips head (Pozidriv) screwdriver is required for installation.
Applicable power supply reference	Single-phase 115V 1/6HP, 230V 1/2HP; Three-phase 200–230V 1HP, 460–575V 3HP
Brand/Product Line	Siemens SIRIUS 3RV20
Product nature	Genuine Siemens products, Kenxin Motor is an authorized distributor.

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