Description
The Siemens 3RV2021-1KA10 is a Size S0 Manual Motor Starter Protector (MSP) engineered to deliver dependable short-circuit and overload protection for three-phase motors in HVAC, commercial, and light industrial applications. With a current adjustment range of 9 to 12.5 A and convenient screw terminal connections, this compact device simplifies panel wiring while providing robust motor protection in a space-saving footprint.
Product Overview
The 3RV2021 series MSPs are designed for direct-on-line motor starting and are suitable for use as both a motor protection circuit breaker and a manual motor controller. The screw terminal version ensures secure, vibration-resistant connections ideal for demanding HVAC mechanical room environments.
Key Features
- Current setting range: 9–12.5 A
- Frame size: S0 (compact, panel-space-saving design)
- Screw terminal connection for secure, reliable wiring
- Integrated short-circuit and overload protection in a single device
- Manual ON/OFF switching capability
- Trip-free mechanism prevents reset under fault conditions
- Suitable for three-phase motor protection applications
- Compatible with Siemens 3RV2 series accessories, auxiliary contacts, and bus bar systems
- Finger-safe terminal design for enhanced installer safety
Specifications
- SKU / Part Number: 3RV2021-1KA10
- Brand: Siemens
- Series: 3RV2021
- Frame Size: S0
- Current Range: 9–12.5 A
- Terminal Type: Screw
- Application: Motor starter protection (overload & short-circuit)
Applications
- HVAC fan and blower motor protection
- Pump motor protection in hydronic and chilled water systems
- Commercial and light industrial motor control panels
- Direct-on-line (DOL) motor starting circuits
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