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Siemens 3RH21221AF00 IEC Control Relay - Combination DIN-Rail & Surface-Mounted Relays
SiemensCombination DIN-Rail & Surface-Mounted Relays

Siemens 3RH21221AF00 IEC Control Relay

The SIEMENS IEC Control Relay (MPN 3RH21221AF00) is a combination DIN-rail and surface-mounted relay with a 120V AC coil voltage and 2NO/2NC, 10 A contact configuration. 3G Electric interprets your demand for this…

SKU 3G-OTH-37160

Brand
Siemens
Item
3RH21221AF00 IEC Control Relay
Part Number
3RH21221AF00
Category
Combination DIN-Rail & Surface-Mounted Relays
Available to Order
Also known as:3RH21221AF00Siemens
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Technical Specifications

Siemens
Manufacturer Part Number
3RH21221AF00
Type
2NO/2NC, 10 A
AC Coil Volt
120V

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

Product Description

The SIEMENS IEC Control Relay (MPN 3RH21221AF00) is a combination DIN-rail and surface-mounted relay with a 120V AC coil voltage and 2NO/2NC, 10 A contact configuration. 3G Electric interprets your demand for this specific control component, sourcing it from our extensive network across 14 industrial departments, with specialist depth in electrical controls as an authorised distributor for brands like Siemens.

Frequently Asked Questions

What is the SIEMENS 3RH21221AF00 control relay used for?

The SIEMENS 3RH21221AF00 is an IEC control relay used for switching and isolating electrical loads in industrial automation, motor control centers, and panel building. 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 3RH21221AF00?

The SIEMENS 3RH21221AF00 is a combination DIN-rail and surface-mounted relay with a 120V AC coil voltage, 2 normally open and 2 normally closed contacts, and a 10 A rated current. It is part of the Siemens 3RH2 series, designed for compact control panel layouts.

Where to buy the SIEMENS 3RH21221AF00 worldwide?

You can source the SIEMENS 3RH21221AF00 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 3RH21221AF00 control relay?

Mount the SIEMENS 3RH21221AF00 on a DIN rail or surface using the integrated slots. Connect the 120V AC coil supply to the designated terminals, then wire the 2NO/2NC contacts per your control schematic. Ensure the load current does not exceed 10 A and follow standard electrical safety practices.

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
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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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