Siemens Control Relay: DIN-Rail & Surface Relay Mounting, 24V DC Coil Volt, 4NO
The SIEMENS IEC Control Relay (MPN 3RH21402FB40) is a combination DIN-rail and surface-mounted relay with a 4NO, 10 A contact configuration and a 24V DC coil voltage. 3G Electric interprets your demand for this…
SKU 3G-OTH-37444
Need installation or engineering help?
Ask a question
Product Description
The SIEMENS IEC Control Relay (MPN 3RH21402FB40) is a combination DIN-rail and surface-mounted relay with a 4NO, 10 A contact configuration and a 24V DC coil voltage. 3G Electric interprets your demand for this specific Siemens control component, sourcing it across our global network and supporting your application with specialist expertise in electrical controls.
Frequently Asked Questions
What is the SIEMENS 3RH21402FB40 control relay used for?
The SIEMENS 3RH21402FB40 is an IEC control relay used for switching and controlling industrial loads such as motors, valves, and lighting. It is commonly applied in automation panels, conveyor systems, and machine control circuits where reliable 24 VDC coil operation and 4 normally open contacts are required.
What are the specifications of the SIEMENS 3RH21402FB40 relay?
This SIEMENS relay has a 24 VDC coil voltage, 4 normally open (4NO) contacts rated at 10 A, and mounts on DIN-rail or surface. The manufacturer part number is 3RH21402FB40. It is designed for IEC industrial control applications requiring compact, reliable switching.
Where to buy the SIEMENS 3RH21402FB40 relay worldwide?
You can source the SIEMENS 3RH21402FB40 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 Siemens control relay.
How to install the SIEMENS 3RH21402FB40 relay on DIN-rail?
To install the SIEMENS 3RH21402FB40, snap it onto a standard 35 mm DIN-rail until it locks. For surface mounting, use the provided screw holes. Ensure the 24 VDC coil supply is correctly polarized and the contacts are wired within the 10 A rating. Follow standard IEC installation practices.
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.
