3RH1921-1HA22

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Overview of Siemens 3RH1921-1HA22

Buy genuine Siemens 3RH1921-1HA22 online today to enhance your industrial automation setup with reliable auxiliary contact technology. The Siemens 3RH1921-1HA22 is a front-mounted auxiliary switch block designed specifically for use with Siemens 3RT1 Size S0 to S3 motor contactors. This accessory features four poles, with 2 normally open (NO) and 2 normally closed (NC) contacts, making it ideal for expanding switching capabilities in control circuits. Its easy snap-on installation onto contactors allows tool-less mounting and removal, ensuring quick integration and maintenance. Backed by Siemens’ renowned quality, this auxiliary contact block meets IEC 60947 standards and supports operation in demanding environments with an IP20 protection class and ambient temperature range from -25 to +60°C. It’s a trusted choice for enhancing contactor functionality in various industrial applications.

Key Features of Siemens 3RH1921-1HA22

  • Auxiliary switch block with 2 normally open and 2 normally closed contacts
  • Compatible with Siemens 3RT1 Size S0-S3 motor contactors
  • Tool-less snap-on front mounting for easy installation and removal
  • IEC 60947 compliant for industrial use and reliability
  • Electrical endurance of 200,000 switching cycles at AC-15, 230 V
  • Mechanical service life of approximately 10 million switching cycles
  • Rated insulation voltage up to 690 V and surge voltage resistance of 6 kV
  • Screw terminal connections for secure wiring
  • IP20 protection class suitable for standard industrial environments

Technical Specs of 3RH1921-1HA22

Refer to Siemens 3RH1921-1HA22 datasheet for detailed parameters to ensure system compatibility.

Specification Details
Contact Configuration 2 NO + 2 NC, 4-pole
Mounting Front snap-on
Screw Terminals Yes
Electrical Endurance 200,000 cycles (AC-15, 230 V)
Mechanical Service Life 10,000,000 cycles
Insulation Voltage 690 V
Surge Voltage Resistance 6 kV
Protection Class IP20
Operating Temperature -25 to +60 °C

Applications / Use Case

This Siemens 3RH1921-1HA22 is commonly used in industrial automation environments to extend control and signaling functions in motor control circuits. It is especially useful in production line systems, packaging and conveyor operations, and factory control panels where reliable auxiliary contact feedback is required to monitor contactor states or trigger secondary control functions. Its compatibility with Siemens 3RT1 contactors makes it a versatile and essential component for machine automation and process control setups worldwide.

Price & Availability

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Why Order from LeadTime.ca

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3RH1921-1HA22

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