Overview
The Siemens 3RT1926-1CB00 is a compact RC surge suppressor module engineered specifically for retrofitting on Sirius 3RT10 series contactors. This drop-in accessory protects sensitive coil windings from inductive spikes that occur when electromagnetic relays de-energize, extending contactor lifespan and improving system reliability in industrial automation environments.
Key Features
- RC (resistor–capacitor) element design for smooth transient suppression
- Dual voltage rating: 24–48V AC and 24–70V DC coil compatibility
- Compact form factor fits directly on contactor coil terminals
- Compatible with 3RT1023, 3RT1024, 3RT1025, and 3RT1026 SIRIUS contactors
- Reduces electromagnetic interference (EMI) and contact erosion
- Made in Germany; SIRIUS series reliability and quality assurance
Technical Specifications
- Part Number: 3RT1926-1CB00
- Series: SIRIUS 3RT10 (Size S0)
- AC Voltage Rating: 24–48V
- DC Voltage Rating: 24–70V
- Element Type: RC (Resistor–Capacitor)
- Mounting: Plug-on coil terminals (S0–S3 contactors)
- Compatible Contactors: 3RT1023, 3RT1024, 3RT1025, 3RT1026
- Gross Weight: 13.25 g
- Manufacturer: Siemens AG (Germany)
Typical Applications
- Motor control and soft-starters in manufacturing automation
- Pneumatic solenoid valve coil protection
- Industrial AC/DC contactor circuits with long cable runs
- Retrofit suppression on existing 3RT1025 and comparable contactors
- HVAC, pump control, and conveyor systems requiring EMI mitigation
Compatibility & Replacements
The 3RT1926-1CB00 is a direct-fit suppressor for Siemens Sirius 3RT10 series contactors, specifically engineered for 24–70V coil applications. It retrofits on 3RT1023, 3RT1024, 3RT1025, and 3RT1026 units as a straightforward plug-on accessory. For higher voltage suppression (48–127V AC / 70–150V DC), the 3RT1926-1BC00 variant is available. Alternative suppression designs include varistor modules (MOV-based) and diode assemblies, each suited to different inductive load profiles. Always verify coil voltage before ordering to ensure proper suppression characteristics.
