Siemens Control Relay: DIN-Rail & Surface Relay Mounting, 24V DC Coil Volt, 2NO/2NC
SKU 3G-OTH-37193
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Frequently Asked Questions
What is the SIEMENS 3RH24221BB40 control relay used for?
The SIEMENS 3RH24221BB40 IEC control relay is used for switching and controlling industrial loads in automation, motor control, and panel-building applications. Its 2NO/2NC contact configuration and 10 A rating suit general-purpose control circuits in manufacturing, HVAC, and process industries.
What are the specifications of the SIEMENS 3RH24221BB40 relay?
This SIEMENS relay has a 24 V DC coil voltage, 2 normally open and 2 normally closed contacts rated at 10 A, and mounts on DIN-rail or surface. The manufacturer part number is 3RH24221BB40. It is designed for IEC control circuits requiring reliable switching in industrial environments.
Where to buy the SIEMENS 3RH24221BB40 relay worldwide?
3G Electric supplies the SIEMENS 3RH24221BB40 control relay worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this IEC relay. We source genuine Siemens components for global industrial customers.
How to install the SIEMENS 3RH24221BB40 relay on DIN-rail?
To install the SIEMENS 3RH24221BB40 relay, snap it onto a standard 35 mm DIN-rail until it locks. For surface mounting, use the integrated mounting holes. Wire the 24 V DC coil to terminals A1 and A2, and connect load circuits to the NO/NC contacts rated at 10 A. Follow Siemens wiring diagrams for safety.
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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.
