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Siemens Magnetic Contactor: 3 Poles, 24V DC, 38 A - Safety Contactors
SiemensSafety Contactors

Siemens Magnetic Contactor: 3 Poles, 24V DC, 38 A

The SIEMENS IEC Magnetic Contactor: 3 Poles is a safety contactor from the SIRIUS 3RT series, with part number 3RT20281BB443MA0. It operates at 24V DC and 38 A, and does not include integrated surge suppression.

SKU 3G-OTH-39544

Brand
Siemens
Item
Magnetic Contactor: 3 Poles, 24V DC, 38 A
Category
Safety Contactors
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Technical Specifications

Siemens
Manufacturer Part Number
3RT20281BB443MA0
Type
38 A, SIRIUS 3RT Safety Contactors
DC
24V
Integrated Surge Suppression
No
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS IEC Magnetic Contactor: 3 Poles is a safety contactor from the SIRIUS 3RT series, with part number 3RT20281BB443MA0. It operates at 24V DC and 38 A, and does not include integrated surge suppression.

Frequently Asked Questions

What is the SIEMENS 3RT20281BB443MA0 safety contactor used for?

The SIEMENS 3RT20281BB443MA0 is a SIRIUS 3RT safety contactor used for safely switching motors and loads in industrial machinery, conveyors, and automation systems. It provides reliable isolation and emergency-stop functionality in safety circuits, meeting IEC standards for machine safety.

What are the specifications of the SIEMENS 3RT20281BB443MA0 contactor?

This SIEMENS IEC magnetic contactor has 3 poles, operates at 24 VDC, and is rated for 38 A. It is part of the SIRIUS 3RT series (MPN 3RT20281BB443MA0) and does not include integrated surge suppression. It is designed for safety applications requiring reliable switching and isolation.

Where to buy the SIEMENS 3RT20281BB443MA0 contactor worldwide?

You can source the SIEMENS 3RT20281BB443MA0 safety contactor worldwide through 3G Electric. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply genuine Siemens components globally.

How to install the SIEMENS 3RT20281BB443MA0 safety contactor?

Mount the SIEMENS 3RT20281BB443MA0 on a DIN rail or panel using the provided clips. Wire the 24 VDC coil to a safety relay or PLC output, and connect the three main poles to the load circuit. Ensure proper fusing and follow Siemens SIRIUS 3RT installation guidelines for safe operation.

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 safety contactors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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