Overview
The Siemens 3RV1011-1KA10 is a compact, single-pole motor protection circuit breaker designed for industrial motor control applications requiring manual on/off switching and thermal overload protection. This Class 10 starter protector combines thermal bimetallic elements with magnetic short-circuit detection to safeguard 9–12A motors against overload and phase loss conditions in demanding environments.
Key Features
- ON/OFF rocker switch mechanism with lockout capability for safe motor disconnection
- Class 10 overload trip characteristics—rapid response in 10 seconds or less at 1.2× rated current
- Magnetic instantaneous trip at approximately 12× the FLA setting for short-circuit protection
- Bimetallic thermal compensation element prevents nuisance tripping from panel temperature rise
- Differential phase-loss trip bar ensures fast shutdown if a phase is lost, protecting motor windings
- Screw terminals for secure, field-serviceable connections
- Standard 35 mm DIN rail mounting for space-efficient panel integration
Technical Specifications
- Adjustable Current Range: 9–12 A (FLA)
- Trip Class: Class 10 (overload trips in 10 seconds or less at 1.2× setting)
- Short-Circuit Release: 156 A instantaneous
- Maximum Rated Current: 100 A
- Rated Operational Voltage: 690 V AC
- Short-Circuit Rating: 50 kA @ 400V AC; 65 kA UL @ 480V
- Motor Protection Capacity: Up to 45 kW @ 400V AC, 3-phase
- Switching Mechanism: Manual ON/OFF rocker with mechanical lockout
- Connection Type: Screw terminals
- Mounting: 35 mm DIN rail
- Frame Size: 3RV101 (Size S00)
- Thermal Protection: Bimetallic heating element (AC and DC rated)
- Operating Temperature Range: –20°C to +60°C
- Phase-Loss Sensitive: Yes
- Manufacturer: Siemens
Typical Applications
- Pump and compressor motor circuits in industrial plants and utilities
- Production line and conveyor system motor protection
- HVAC system motor starters in commercial buildings
- Manual motor control centers and combination starters paired with 3RT1 contactors
- Load-feeder protection in low-voltage distribution panels
- Emergency stop and system protection circuits requiring manual override
Compatibility & Replacements
Compatible With
- Siemens 3RT1 series contactors for combination motor controller assemblies
- Siemens 3RV1901 auxiliary contact blocks (2-pole, front or side mount) for signaling and disconnection logic
- Standard 35 mm DIN rail enclosure systems
- Motor circuits rated 400–690V AC, 3-phase and single-phase
- AC and DC motor protection applications
Replaces / Drop-In Replacement For
- Siemens 3RV1011-1KA10 (existing stock, no substitution needed)
- The newer Siemens 3RV2011-1KA10 serves as an updated replacement for enhanced reliability and feature set
Works With
- Siemens SIRIUS motor control architecture and protective device families
- Industrial control systems using manual motor starters and hardwired logic
- IEC 60947-4-1 compliant motor control circuits
- Panel-mounted and distributed motor protection schemes
