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SIEMENS 3RH1921-1FA40 Auxiliary Contact Block

Product Description

The SIEMENS 3RH1921-1FA40 is an auxiliary contact block designed for the 3RH1 series of contactors and relays. It provides additional switching contacts to monitor or control circuits in industrial automation systems. This model features a compact design with screw terminals and is compatible with SIRIUS Classic contactors, enabling easy integration into existing setups .

Key Features & Advantages

Flexible Contact Configuration
- 4 normally open (NO) contacts, allowing versatile signaling and control applications .
- 6A current rating (AC/DC) for reliable performance in low-power circuits .
Robust Industrial Design
- Screw-type terminals for secure wiring, supporting 2 x 2.5 mm² cables .
- IP20 protection against dust and accidental contact .
- Wide operating temperature range (-25°C to +60°C), suitable for harsh environments .
Easy Installation
- Snap-on mounting for tool-free attachment to compatible contactors (e.g., 3RH1/3RT2 series) .
- Compact dimensions (10 x 80 x 71 mm) for space-efficient panel integration .
High Durability
- Mechanical lifespan: 10 million switching cycles, ensuring long-term reliability .
- Surge voltage resistance: Up to 6 kV for protection against transient overloads .

Technical Specifications

Parameter	Specification
Contact Type	4 NO
Current Rating	6A (AC/DC)
Voltage Rating	250V DC / 690V AC
Terminals	Screw-type (2 x 2.5 mm²)
Mounting	Snap-on (front-mounted)
Operating Temp.	-25°C to +60°C
Dimensions (W×H×D)	10 × 80 × 71 mm
Certifications	CE, 3C (China)