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Siemens Control Relay: DIN-Rail & Surface Relay Mounting, 24V DC Coil Volt, 4NO - Combination DIN-Rail & Surface-Mounted Relays
SiemensCombination DIN-Rail & Surface-Mounted Relays

Siemens Control Relay: DIN-Rail & Surface Relay Mounting, 24V DC Coil Volt, 4NO

The SIEMENS IEC Control Relay is a combination DIN-rail and surface-mounted relay with 4 normally open contacts rated at 10 A and a 24 V DC coil voltage (MPN 3RH21401BB40). 3G Electric interprets your demand for this…

SKU 3G-OTH-37400

Brand
Siemens
Item
Control Relay: DIN-Rail & Surface Relay Mounting, 24V DC Coil Volt, 4NO
Category
Combination DIN-Rail & Surface-Mounted Relays
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Siemens
Manufacturer Part Number
3RH21401BB40
Type
4NO, 10 A
DC Coil Volt
24V

Technical Documents

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS IEC Control Relay is a combination DIN-rail and surface-mounted relay with 4 normally open contacts rated at 10 A and a 24 V DC coil voltage (MPN 3RH21401BB40). 3G Electric interprets your demand for this specific control component, sources it from our extensive network across 14 industrial departments, and supports your application with specialist depth in electrical controls.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the SIEMENS 3RH21401BB40 control relay used for?

The SIEMENS 3RH21401BB40 is an IEC control relay used for switching and controlling industrial loads such as motors, valves, and lighting. Its 4NO contacts and 10 A rating make it suitable for automation panels, conveyor systems, and machine control in manufacturing and process industries.

What are the specifications of the SIEMENS 3RH21401BB40 relay?

The SIEMENS 3RH21401BB40 is a 4NO, 10 A control relay with a 24 V DC coil voltage. It mounts on DIN-rail or surface, making it versatile for panel layouts. The part number is 3RH21401BB40, and it is designed for IEC industrial environments requiring reliable switching.

Where to buy the SIEMENS 3RH21401BB40 relay worldwide?

You can source the SIEMENS 3RH21401BB40 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 3RH21401BB40 relay on a DIN-rail?

To install the SIEMENS 3RH21401BB40 on a DIN-rail, snap the relay onto the rail until it locks. For surface mounting, use the provided screw holes. Ensure the 24 V DC coil voltage matches your control circuit. Wire the 4NO contacts according to your load requirements, and verify polarity if needed.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens 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.

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SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 24V AC Coil Volt, 4NO, 10 A (MPN 3RH21401AB00)
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