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Siemens Control Relay: DIN-Rail & Surface Relay Mounting, 24V AC Coil Volt, 2NO/2NC - Combination DIN-Rail & Surface-Mounted Relays
SiemensCombination DIN-Rail & Surface-Mounted Relays

Siemens Control Relay: DIN-Rail & Surface Relay Mounting, 24V AC Coil Volt, 2NO/2NC

The SIEMENS IEC Control Relay (MPN 3RH21221AB00) is a combination DIN-rail and surface-mounted relay with a 2NO/2NC contact configuration rated at 10 A and a 24V AC coil voltage. 3G Electric interprets this demand…

SKU 3G-OTH-37215

Brand
Siemens
Item
Control Relay: DIN-Rail & Surface Relay Mounting, 24V AC Coil Volt, 2NO/2NC
Category
Combination DIN-Rail & Surface-Mounted Relays
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Technical specs
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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
3RH21221AB00
Type
2NO/2NC, 10 A
AC Coil Volt
24V

Technical Documents

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

Product Description

The SIEMENS IEC Control Relay (MPN 3RH21221AB00) is a combination DIN-rail and surface-mounted relay with a 2NO/2NC contact configuration rated at 10 A and a 24V AC coil voltage. 3G Electric interprets this demand and delivers the genuine Siemens part, backed by specialist expertise across 14 industrial departments — including electrical controls — to ensure you get the right solution, not just a part.

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 3RH21221AB00 control relay used for?

The SIEMENS 3RH21221AB00 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 3RH21221AB00 relay?

This SIEMENS relay has a 24 V AC coil voltage, 2 normally open and 2 normally closed contacts rated at 10 A. It mounts on DIN-rail or surface, with a compact design for control panels. The MPN is 3RH21221AB00, and it is part of the SIEMENS IEC control relay family.

Where to buy the SIEMENS 3RH21221AB00 relay worldwide?

3G Electric supplies the SIEMENS 3RH21221AB00 relay to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time; we source and deliver this relay globally.

How to install the SIEMENS 3RH21221AB00 relay on a DIN-rail?

To install, snap the relay onto a standard 35 mm DIN-rail until it locks. For surface mounting, use the integrated mounting holes. Wire the 24 V AC coil to terminals A1 and A2, and connect load circuits to the NO/NC contacts. Ensure the coil voltage matches your supply before energizing.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 120V AC Coil Volt, 2NO/2NC, 10 A (MPN 3RH21221AK60)
Siemens
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 120V AC Coil Volt, 2NO/2NC, 10 A (MPN 3RH21221AK60)
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 24V DC Coil Volt, 2NO/2NC, 10 A (MPN 3RH21221BB40)
Siemens
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 24V DC Coil Volt, 2NO/2NC, 10 A (MPN 3RH21221BB40)
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 240V AC Coil Volt, 2NO/2NC, 10 A (MPN 3RH21221AN20)
Siemens
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 240V AC Coil Volt, 2NO/2NC, 10 A (MPN 3RH21221AN20)
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 24V AC Coil Volt, 3NO/1NC, 10 A (MPN 3RH21311AB00)
Siemens
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 24V AC Coil Volt, 3NO/1NC, 10 A (MPN 3RH21311AB00)
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 110V DC Coil Volt, 2NO/2NC, 10 A (MPN 3RH21221BF40)
Siemens
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 110V DC Coil Volt, 2NO/2NC, 10 A (MPN 3RH21221BF40)
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 24V AC Coil Volt, 4NO, 10 A (MPN 3RH21401AB00)
Siemens
SIEMENS IEC Control Relay: DIN-Rail & Surface Relay Mounting, 24V AC Coil Volt, 4NO, 10 A (MPN 3RH21401AB00)

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