3RH1921-1EA11 | Siemens Auxiliary Contact Block One Normally Open One Normally Closed

Siemens · HMIs & Displays

Description  The Siemens 3RH1921-1EA11 is an auxiliary contact block designed to extend the signaling and control capabilities of industrial contactors. It provides one normally open and one normally closed contact for reliable status feedback and control logic. This accessory is intended for lateral mounting on compatible Siemens contactors used in motor control applications.     Technical Specifications  Condition New/Never Used Surplus Brand Siemens Category Contactors & Starters Part Number 3RH1921-1EA11 Subcategory Auxiliary Contact Contact Configuration 1 NO + 1 NC Compatible Contactor Sizes S0 to S12 Mounting Type Lateral Mount Connection Method Screw Connection Connection Pitch 10 mm Insulation Voltage 500 V Surge Voltage Resistance 6 kV Front Protection Rating IP20 Mechanical Service Life 10,000,000 Operations Electrical Endurance (AC-15, 230 V) 200,000 Operations Contact Reliability 1 Faulty Switching per 100 Million Operating Temperature -25 to +60 °C Storage Temperature -55 to +80 °C Mirror Contact Function Yes, with 3RT1 Standards Compliance DIN EN 50005     Information About 3RH1921-1EA11 The 3RH1921-1EA11 is part of the Siemens auxiliary contact accessory range developed for use with motor contactors in industrial control systems. It is designed for lateral installation and integrates directly onto compatible Siemens contactors without additional wiring complexity. The auxiliary block provides reliable signaling contacts for control circuits, interlocks, and status monitoring. It is commonly used in motor starters, control panels, and automation systems where dependable auxiliary feedback is required. Key Features: One Normally Open And One Normally Closed Contact: Enables flexible control and signaling configurations. Wide Contactor Compatibility: Designed for Siemens contactors from size S0 through S12. Lateral Mounting Design: Allows compact installation without increasing panel depth. High Mechanical Durability: Rated for up to ten million mechanical operating cycles. Reliable Electrical Performance: Designed for long service life in AC-15 control circuits. Industrial Safety Compliance: Conforms to DIN EN 50005 and relevant IEC standards. Secure Screw Connection: Provides stable and vibration-resistant electrical connections. The 3RH1921-1EA11 delivers the reliability and precision required for auxiliary signaling and control in Siemens motor switching and industrial automation applications.

Brand: Siemens · Category: HMIs & Displays

Key features

• One Normally Open And One Normally Closed Contact: Enables flexible control and signaling configurations.
• Wide Contactor Compatibility: Designed for Siemens contactors from size S0 through S12.
• Lateral Mounting Design: Allows compact installation without increasing panel depth.
• High Mechanical Durability: Rated for up to ten million mechanical operating cycles.
• Reliable Electrical Performance: Designed for long service life in AC-15 control circuits.
• Industrial Safety Compliance: Conforms to DIN EN 50005 and relevant IEC standards.
• Secure Screw Connection: Provides stable and vibration-resistant electrical connections.

Specifications

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