Siemens Control Relay: DIN-Rail & Surface Relay Mounting, 240V AC Coil Volt, 2NO/2NC
SKU 3G-OTH-37183
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Frequently Asked Questions
What is the SIEMENS 3RH21221AN20 control relay used for?
The SIEMENS 3RH21221AN20 is an IEC control relay used for switching and isolating electrical loads in industrial automation, motor control centers, and panel building. Its 2NO/2NC contact configuration and 10 A rating suit general-purpose control circuits across manufacturing, HVAC, and process industries.
What are the specifications of the SIEMENS 3RH21221AN20 relay?
This SIEMENS control relay has a 240V AC coil voltage, 2 normally open and 2 normally closed contacts rated at 10 A. It mounts on DIN-rail or surface, with part number 3RH21221AN20. The compact design fits standard industrial control panels and is suitable for global 50/60 Hz AC systems.
Where to buy the SIEMENS 3RH21221AN20 relay worldwide?
3G Electric supplies the SIEMENS 3RH21221AN20 control relay to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine Siemens parts and support procurement for any region. Contact us for pricing and lead time.
How to install the SIEMENS 3RH21221AN20 relay on DIN-rail?
To install the SIEMENS 3RH21221AN20, snap it onto a standard 35 mm DIN-rail until it locks. For surface mounting, use the integrated mounting holes. Wire the 240V AC coil to terminals A1/A2 and connect load circuits to the 2NO/2NC contacts rated at 10 A. Follow local electrical codes and Siemens installation guidelines.
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Common applications for SiemensSiemens Products
3G Electric supplies Siemens combination din-rail & surface-mounted relays. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
