Siemens Control Relay: DIN-Rail & Surface Relay Mounting, 24V DC Coil Volt, 2NO/2NC
The SIEMENS IEC Control Relay is a combination DIN-rail and surface-mounted relay (MPN 3RH21221BB40) with a 24V DC coil voltage and 2NO/2NC, 10 A contact configuration. 3G Electric interprets this demand and sources…
SKU 3G-OTH-37231
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Product Description
The SIEMENS IEC Control Relay is a combination DIN-rail and surface-mounted relay (MPN 3RH21221BB40) with a 24V DC coil voltage and 2NO/2NC, 10 A contact configuration. 3G Electric interprets this demand and sources the genuine Siemens part, backed by specialist expertise across 14 industrial departments including electrical controls.
Frequently Asked Questions
What is the SIEMENS 3RH21221BB40 control relay used for?
The SIEMENS 3RH21221BB40 is an IEC control relay used for switching and isolating electrical loads in industrial automation, motor control centers, and panel building. It is suitable for DIN-rail or surface mounting and handles up to 10 A with a 24 VDC coil.
What are the specifications of the SIEMENS 3RH21221BB40 relay?
This SIEMENS relay has a 24 VDC coil voltage, 2NO/2NC contact configuration, and a rated current of 10 A. It supports combination DIN-rail and surface mounting. The manufacturer part number is 3RH21221BB40, and it is part of the SIEMENS IEC control relay series.
Where to buy the SIEMENS 3RH21221BB40 relay worldwide?
You can source the SIEMENS 3RH21221BB40 relay through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this relay.
How to install the SIEMENS 3RH21221BB40 control relay?
Mount the relay on a DIN rail or surface using the integrated clip. Connect the 24 VDC coil supply to the designated terminals, and wire the 2NO/2NC contacts according to your control circuit. Ensure the load does not exceed 10 A. Follow standard IEC installation practices for safety.
Used in
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.
