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Siemens Magnetic Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 17 A - Non-Reversing IEC Contactors
SiemensNon-Reversing IEC Contactors

Siemens Magnetic Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 17 A

The SIEMENS IEC Magnetic Contactor: Non-Reversing (MPN 3RT20251BB40) is a non-reversing IEC contactor with 3 poles, 3NO contacts, a 17 A rating, and a 24V DC coil. It does not include integrated surge suppression.

SKU 3G-OTH-42579

Brand
Siemens
Item
Magnetic Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 17 A
Category
Non-Reversing IEC Contactors
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Technical Specifications

Siemens
Manufacturer Part Number
3RT20251BB40
Type
17 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: Non-Reversing (MPN 3RT20251BB40) is a non-reversing IEC contactor with 3 poles, 3NO contacts, a 17 A rating, and a 24V DC coil. It does not include integrated surge suppression.

Frequently Asked Questions

What is the SIEMENS 3RT20251BB40 IEC magnetic contactor used for?

The SIEMENS 3RT20251BB40 is a non-reversing IEC magnetic contactor used to switch motors, lighting, and other inductive loads in industrial control panels. Its 17 A rating and 24V DC coil make it suitable for automation systems requiring reliable, low-voltage control across manufacturing, HVAC, and material handling applications.

What are the specifications of the SIEMENS 3RT20251BB40 contactor?

The SIEMENS 3RT20251BB40 is a 3-pole, non-reversing IEC contactor rated 17 A with 3 normally open (3NO) contacts and a 24V DC coil. It does not include integrated surge suppression. This model is designed for switching loads in industrial environments where compact size and IEC compliance are required.

Where to buy the SIEMENS 3RT20251BB40 contactor worldwide?

3G Electric supplies the SIEMENS 3RT20251BB40 contactor to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact our team for a quote and lead time on this genuine Siemens part.

How to install the SIEMENS 3RT20251BB40 contactor?

Mount the SIEMENS 3RT20251BB40 on a DIN rail or panel using the provided clips. Connect the 24V DC coil to a suitable power supply, ensuring polarity is correct. Wire the 3NO main contacts per your load circuit. Always follow Siemens installation guidelines 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 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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