Overview
The Siemens 3RV1011-1KA10 is a compact, current-limiting motor starter protector from the SIRIUS family, designed for 3-pole motor circuits with rated currents of 9–12.5A. This unit provides integrated overload and short-circuit protection, making it ideal for direct online (DOL) motor control in industrial applications. Class 10 trip characteristics ensure rapid disconnection under overload conditions, protecting motors from thermal damage and electrical stress.
Key Features
- Adjustable Current Range: 9–12.5A with dial adjustment for motor FLA setting
- Class 10 Overload Trip: Trips in 10 seconds or less when overload is detected
- Bimetallic Overload Protection: Temperature-compensated thermal elements protect AC and DC motors
- Magnetic Short-Circuit Trip: 156A instantaneous short-circuit release (12× maximum FLA setting)
- ON/OFF Rocker Mechanism: Manual control with lockout capability for safety
- DIN Rail Mount: 35mm standard DIN rail installation, screw terminals
- Phase Loss Detection: Differential trip bar prevents single-phase operation and associated motor damage
- Thermal Compensation: Fourth bimetallic strip prevents nuisance trips from elevated enclosure temperature
Technical Specifications
- Manufacturer Part Number: 3RV1011-1KA10
- Poles: 3-pole
- Adjustable Current Range: 9–12.5A
- Trip Class: Class 10 (≤10 seconds at 1.05× rated current)
- Overload Release: 156A instantaneous (short-circuit setting)
- Rated Voltage: Up to 690V AC
- Short-Circuit Breaking Capacity: 65kA at 480V, 50kA at 400V AC
- Maximum Switching Frequency: 15 operations/hour
- Mechanical Life: 10⁵ operations
- Operating Temperature Range: –20 to +60°C
- Mounting: 35mm DIN rail, screw terminals
- Dimensions: Approximately 1.97 × 3.94 × 3.54 inches
- Frame Size: 3RV101
- Compatible Motor Ratings: Up to 55/45 kW at 400V AC 3-phase
Typical Applications
- Pump control panels and variable load protection
- Mass production and assembly line motor circuits
- HVAC system motor starters
- General industrial automation and load feeders
- Direct online (DOL) motor starting with built-in overload protection
- Transformer and system protection in motor distribution circuits
- Applications requiring phase-loss detection and thermal compensation
Compatibility & Replacements
Compatible With
- Siemens 3RT1 contactors (for combination motor controller configuration)
- Siemens 3RV1901 auxiliary contact modules (front or side mount)
- 35mm DIN rail standard electrical enclosures
- AC and DC motor circuits up to 690V
- NEC 430-53(C) Group Installation configurations
Replaces / Drop-In Replacement For
- Earlier versions of the Siemens 3RV1011 series in the 9–12.5A range
- Verify compatibility with your system integrator before ordering for legacy system upgrades.
Works With
- Manual motor control via rocker switch (no auxiliary control required)
- Pilot devices and signaling circuits (with optional 3RV1901 auxiliary contacts)
- Motor disconnection systems during overcurrent or overload events
- DIN rail-based industrial control and distribution systems
