Description
The Siemens SIRIUS 3RH1921-1HA22 Auxiliary Contact Block (3RH1921-1HA22) is a compact auxiliary contact module designed for expanding the auxiliary contact capacity of SIRIUS contactors and motor starters. This contact block features a 4-pole configuration with 2 normally open (NO) and 2 normally closed (NC) contacts, providing additional switching capacity for control and signaling circuits. With its screw terminal connection and front-mounting design, it can be easily attached to compatible SIRIUS contactors (S0-S3 frame sizes) without occupying additional panel space. The module supports a maximum switching current of 10A at 690V AC, making it suitable for various industrial control applications requiring additional auxiliary contacts for interlocking, signaling, or monitoring functions.
Key Features
- Auxiliary Contact Block with 4-pole configuration
- Contact arrangement: 2 NO + 2 NC
- Rated switching current: 10A (AC-12/AC-15)
- Screw terminal connection
- Front-mounting design for S0-S3 frame contactors
- DIN EN 50012 compliant
- Mechanical life: 10 million operations
- Electrical life: 200,000 operations (AC-15, 230V)
- Country of origin: Germany
Technical Specifications
- Number of Contacts: 4 poles (2 NO + 2 NC)
- Rated Operational Current: 10A (AC-12/AC-15)
- Rated Voltage: 690V AC
- Contact Arrangement: 2 normally open + 2 normally closed
- Connection Type: Screw terminals
- Compatible Frame Sizes: S0, S1, S2, S3
- Mounting Position: Front-mounted
- Mechanical Life: 10,000,000 operations
- Electrical Life: 200,000 operations (AC-15, 230V)
- Operating Temperature: -25°C to +60°C
- Storage Temperature: -55°C to +80°C
- Protection Degree: IP20 (front)
- Insulation Voltage: 690V (pollution degree 3)
- Impulse Withstand Voltage: 6kV
- Weight: approx. 0.065 kg
- Standards: IEC 60947, DIN EN 50012, RoHS compliant
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for configuration and integration
- Wiring and installation assistance
- Compatibility verification with existing systems
- Commissioning and diagnostics support available
Delivery Time
- Standard delivery: 3-5 working days
- Express shipping available upon request
Why Choose Our Store
- Genuine Siemens SIRIUS components
- Global supply network with competitive pricing
- Expertise in industrial automation systems
- Comprehensive technical documentation
- Responsive customer service and support
Applications
- Contactor auxiliary contact expansion
- Motor control circuit interlocking
- Control circuit signaling and indication
- PLC input/output extension
- Safety interlock circuits
- Equipment status monitoring
- Industrial automation control panels
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