Siemens Control Relay: DIN-Rail & Surface Relay Mounting, 125V DC Coil Volt, 2NO/2NC
The SIEMENS IEC Control Relay is a combination DIN-rail and surface-mounted relay with a 2NO/2NC contact configuration rated at 10 A. It operates with a 125V DC coil voltage (MPN 3RH21221BG40). 3G Electric interprets…
SKU 3G-OTH-37576
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Product Description
The SIEMENS IEC Control Relay is a combination DIN-rail and surface-mounted relay with a 2NO/2NC contact configuration rated at 10 A. It operates with a 125V DC coil voltage (MPN 3RH21221BG40). 3G Electric interprets this demand and delivers the genuine Siemens part, backed by specialist sourcing across 14 industrial departments.
Frequently Asked Questions
What is the SIEMENS 3RH21221BG40 control relay used for?
The SIEMENS 3RH21221BG40 is an IEC control relay used for switching and isolating electrical circuits in industrial automation, motor control centers, and panel building. Its 2NO/2NC contact configuration and 10 A rating suit general-purpose control applications in manufacturing, energy, and process industries.
What are the specifications of the SIEMENS 3RH21221BG40 relay?
This SIEMENS relay has a 125V DC coil voltage, 2 normally open and 2 normally closed contacts rated at 10 A. It mounts on DIN-rail or surface, with part number 3RH21221BG40. It is designed for IEC control circuits and is suitable for global industrial environments.
Where to buy the SIEMENS 3RH21221BG40 relay worldwide?
You can source the SIEMENS 3RH21221BG40 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 part.
How to install the SIEMENS 3RH21221BG40 control relay?
Mount the relay on a standard DIN rail or surface using the integrated clip. Wire the coil to a 125V DC supply and connect load circuits to the 2NO/2NC terminals rated at 10 A. Follow SIEMENS wiring diagrams and ensure proper isolation before energizing.
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.
