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Siemens Magnetic Contactor: Non-Reversing, 4 Poles, 2NO/2NC Contacts, 16 A - Non-Reversing IEC Contactors
SiemensNon-Reversing IEC Contactors

Siemens Magnetic Contactor: Non-Reversing, 4 Poles, 2NO/2NC Contacts, 16 A

The SIEMENS IEC Magnetic Contactor: Non-Reversing (MPN 3RT25181BB40) is a non-reversing IEC contactor with 4 poles, 2NO/2NC contacts, rated at 16 A, and a 24V DC coil. It does not include integrated surge suppression.

SKU 3G-OTH-51830

Brand
Siemens
Item
Magnetic Contactor: Non-Reversing, 4 Poles, 2NO/2NC Contacts, 16 A
Category
Non-Reversing IEC Contactors
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Technical Specifications

Siemens
Manufacturer Part Number
3RT25181BB40
Type
16 A
Poles
4
DC Coil
24V
Contacts
2NO/2NC
Integrated Surge Suppression
No
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS IEC Magnetic Contactor: Non-Reversing (MPN 3RT25181BB40) is a non-reversing IEC contactor with 4 poles, 2NO/2NC contacts, rated at 16 A, and a 24V DC coil. It does not include integrated surge suppression.

Frequently Asked Questions

What is the SIEMENS 3RT25181BB40 contactor used for?

The SIEMENS 3RT25181BB40 is a non-reversing IEC magnetic contactor used for switching and controlling industrial motors, lighting, and power circuits. Its 4-pole configuration with 2NO/2NC contacts and 16 A rating suits applications in manufacturing, HVAC, and process automation requiring reliable 24V DC coil control.

What are the specifications of the SIEMENS 3RT25181BB40 contactor?

This SIEMENS contactor is rated at 16 A with 4 poles and 2NO/2NC contacts. It features a 24V DC coil and does not include integrated surge suppression. The MPN is 3RT25181BB40. It is a non-reversing IEC type designed for standard motor and load switching in industrial control panels.

Where to buy the SIEMENS 3RT25181BB40 contactor worldwide?

You can source the SIEMENS 3RT25181BB40 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; we supply genuine Siemens components for industrial applications.

How to install the SIEMENS 3RT25181BB40 contactor?

Mount the contactor on a DIN rail or panel using the provided slots. Connect the 24V DC coil to a suitable power supply, ensuring correct polarity. Wire the 2NO/2NC contacts according to your load circuit. Follow Siemens installation guidelines and local electrical codes. Use proper torque for terminal screws.

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 non-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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