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Siemens Magnetic Contactor: Reversing, 3 Poles, 3NO Contacts, 32 A - Reversing IEC Contactors
SiemensReversing IEC Contactors

Siemens Magnetic Contactor: Reversing, 3 Poles, 3NO Contacts, 32 A

The SIEMENS IEC Magnetic Contactor: Reversing is a reversing IEC contactor with 3 poles and 3NO contacts, rated for 32 A and a 24V DC coil (MPN 3RA23278XB301BB4). It does not include integrated surge suppression.

SKU 3G-OTH-45724

Brand
Siemens
Item
Magnetic Contactor: Reversing, 3 Poles, 3NO Contacts, 32 A
Category
Reversing IEC Contactors
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Technical Specifications

Siemens
Manufacturer Part Number
3RA23278XB301BB4
Type
32 A
Poles
3
DC Coil
24V
Contacts
3NO
Integrated Surge Suppression
No
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS IEC Magnetic Contactor: Reversing is a reversing IEC contactor with 3 poles and 3NO contacts, rated for 32 A and a 24V DC coil (MPN 3RA23278XB301BB4). It does not include integrated surge suppression.

Frequently Asked Questions

What is the SIEMENS IEC Magnetic Contactor: Reversing used for?

This reversing contactor is used to control the direction of three-phase motors in industrial applications such as conveyors, hoists, and pumps. It switches motor rotation by alternating the phase sequence, enabling forward and reverse operation in automation and manufacturing systems.

What are the specifications of the SIEMENS 3RA23278XB301BB4 contactor?

The SIEMENS 3RA23278XB301BB4 is a reversing IEC magnetic contactor with 3 poles and 3 normally open (3NO) contacts. It is rated for 32 A and has a 24 V DC coil. It does not include integrated surge suppression. This model is designed for industrial motor control applications.

Where to buy the SIEMENS 3RA23278XB301BB4 contactor worldwide?

You can source the SIEMENS 3RA23278XB301BB4 reversing contactor 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-branded component.

How to install a reversing contactor like the SIEMENS 3RA23278XB301BB4?

Mount the contactor on a DIN rail or panel, ensuring proper ventilation. Connect the three-phase power supply to the line terminals and the motor to the load terminals. Wire the 24 V DC coil to a control circuit with appropriate protection. Follow Siemens wiring diagrams and local electrical codes 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 reversing iec contactors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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