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Siemens SIRIUS 3RT Safety Contactor, 3 Poles, 120V AC, 38 A - Safety Contactors
SiemensSafety Contactors

Siemens SIRIUS 3RT Safety Contactor, 3 Poles, 120V AC, 38 A

The SIEMENS IEC Magnetic Contactor: 3 Poles is a safety contactor from the SIRIUS 3RT series, operating at 120V AC and rated for 38 A. This model (MPN 3RT20281AK643MA0) does not include integrated surge suppression.

SKU 3G-OTH-39944

Brand
Siemens
Item
SIRIUS 3RT Safety Contactor, 3 Poles, 120V AC, 38 A
Category
Safety Contactors
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Siemens
Manufacturer Part Number
3RT20281AK643MA0
Type
38 A, SIRIUS 3RT Safety Contactors
AC
120V
Integrated Surge Suppression
No

Technical Documents

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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, operating at 120V AC and rated for 38 A. This model (MPN 3RT20281AK643MA0) does not include integrated surge suppression.

Frequently Asked Questions

What is the SIEMENS 3RT20281AK643MA0 safety contactor used for?

The SIEMENS 3RT20281AK643MA0 is a SIRIUS 3RT safety contactor used to safely interrupt power in industrial machinery and automation systems. It is commonly applied in emergency-stop circuits, safety gates, and conveyor controls to meet functional safety requirements.

What are the specifications of the SIEMENS 3RT20281AK643MA0 contactor?

This SIEMENS IEC magnetic contactor has 3 poles, a coil voltage of 120V AC, and a rated current of 38 A. It is part of the SIRIUS 3RT series and does not include integrated surge suppression. The manufacturer part number is 3RT20281AK643MA0.

Where to buy the SIEMENS 3RT20281AK643MA0 contactor worldwide?

You can source the SIEMENS 3RT20281AK643MA0 safety contactor worldwide through 3G Electric. We handle full logistics, customs clearance, and delivery to global destinations as an industrial equipment supplier. Contact us for availability and lead time.

How to install the SIEMENS 3RT20281AK643MA0 safety contactor?

Mount the SIEMENS 3RT20281AK643MA0 on a DIN rail or panel using the provided slots. Wire the 120V AC coil to the control circuit and connect the 38 A rated main poles to the load. Ensure proper torque on terminals per the SIRIUS 3RT manual. Always de-energize before installation.

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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This Siemens SIRIUS 3RT safety contactor features 3 poles, a coil voltage of 120V AC, and a rated current of 32 A. It is designed for safely switching and isolating industrial motor loads and machinery, commonly used in emergency-stop circuits and safety interlocks. This model does not include integrated surge suppression
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This Siemens safety contactor is a 3-pole device from the SIRIUS 3RT series, rated 12 A at 120V AC. It is designed for use in safety circuits such as emergency-stop and safety gate applications, providing reliable disconnection of 3-phase loads in industrial machinery and automation systems. No integrated surge suppression
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This Siemens SIRIUS 3RT safety contactor is a 3-pole device rated for 38 A and a 24V DC coil. It is designed for safely switching motors and loads in industrial machinery, conveyors, and automation systems, providing reliable isolation and emergency-stop functionality in safety circuits. No integrated surge suppression

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