Overview
The Siemens 3RT1046-1AK60 SIRIUS contactor is a proven IEC power switching component for industrial motor control circuits. This Siemens 3RT1046-1AK60 model combines German engineering with compact Size S3 form factor, making it ideal for retrofit and new-build automation panels. The contactor operates under AC-3 duty cycle conditions and is fully compatible with auxiliary contact blocks and overload relay modules from the 3RT1 series ecosystem.
Key Features
- AC-3 Rated — Siemens 3RT1046-1AK60 handles motor loads up to 45kW at 400V with high reliability and consistent contact life
- Size S3 Compact Design — Optimized footprint for tight panel installations without sacrificing thermal margin
- Dual Coil Voltage — 110V AC 50Hz or 120V AC 60Hz standard coil, compatible with global supply standards
- Screw Terminal Connections — Secure, tool-less field termination; removable box terminals on Size S3 accept ring lugs or bus bars
- 3-Pole Configuration — Three normally open main contacts rated 95A, suitable for 3-phase motor switching
- DIN Rail Mountable — Integrates directly into standard 35mm DIN rail control cabinets
Technical Specifications
- Contact Configuration — 3 Pole, 3 Normally Open (3NO)
- Rated Current — 95A (AC-3) at 400VAC; 120A at 400VAC (AC-1)
- Power Rating — 45kW at 400V (AC-3)
- Coil Voltage — 110V AC 50Hz / 120V AC 60Hz
- Insulation Level — 1,000V rated
- Surge Voltage Resistance — 6kV
- Pollution Degree — 3 (IEC 60664-1)
- Terminal Type — Screw terminal with removable box terminals (Size S3)
- Mounting — DIN Rail 35mm
- Operating Temperature — Per IEC 60947-4-1
- Standards Compliance — IEC 60947-4-1, EN 60947-4-1, UL 508
- Size Classification — S3 (SIRIUS)
- Weight — 1.839 kg
- Dimensions (L×W×H) — 161 × 79.5 × 167 mm
Typical Applications
The 3RT1046-1AK60 is widely used in:
- Three-phase motor starter circuits in pumps, fans, and compressors
- Machine tool automation and production line controls
- HVAC and refrigeration motor control panels
- Industrial process automation and OEM control systems
- Retrofit installations in existing 3RT1 control architectures
Compatibility & Replacements
Compatible With
- 3RT1 series auxiliary contact blocks (e.g., 3RH1921 relay modules)
- 3RU1146 and 3RU11 thermal overload relay modules
- Standard industrial 3-phase 400VAC power systems
- DIN rail mounting in 35mm control enclosures
- RC elements, varistors, and diode suppression modules for surge protection
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 3RT1046-1AK60 is a legacy SIRIUS model; refer to manufacturer documentation for confirmed cross-reference models or direct replacements in your application.
Works With
- Siemens SIRIUS automation control platforms
- Standard IEC 60947-4-1 compliant control circuits
- Industrial automation software via standard relay/contactor logic programming
- UL 508 listed industrial control panels
