Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
Siemens Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 65 A - Non-Reversing IEC Contactors
SiemensNon-Reversing IEC Contactors

Siemens Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 65 A

The SIEMENS IEC Power Contactor is a non-reversing contactor with 3 poles and 3NO contacts, rated at 65 A with a 24V DC coil (MPN 3RT20373KB40). It features spring-loaded wire termination and integrated surge…

SKU 3G-OTH-44919

Brand
Siemens
Item
Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 65 A
Category
Non-Reversing IEC Contactors
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

Siemens
Manufacturer Part Number
3RT20373KB40
Type
65 A
Poles
3
DC Coil
24V
Contacts
3NO
Wire Termination Type
Spring Loaded
Integrated Surge Suppression
Yes
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS IEC Power Contactor is a non-reversing contactor with 3 poles and 3NO contacts, rated at 65 A with a 24V DC coil (MPN 3RT20373KB40). It features spring-loaded wire termination and integrated surge suppression.

Frequently Asked Questions

What is the SIEMENS 3RT20373KB40 contactor used for?

The SIEMENS 3RT20373KB40 is a non-reversing IEC power contactor used to switch motors, lighting, and other industrial loads. It is suitable for applications requiring reliable on/off control of 3-phase circuits up to 65 A, with a 24V DC coil and integrated surge suppression.

What are the specifications of the SIEMENS 3RT20373KB40 contactor?

This SIEMENS contactor has 3 poles, 3 normally open (3NO) contacts, a 65 A rating, and a 24V DC coil. It features spring-loaded wire termination and integrated surge suppression. The manufacturer part number is 3RT20373KB40.

Where to buy the SIEMENS 3RT20373KB40 contactor worldwide?

3G Electric supplies the SIEMENS 3RT20373KB40 contactor to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this non-reversing IEC power contactor.

How to install the SIEMENS 3RT20373KB40 contactor?

Install the SIEMENS 3RT20373KB40 contactor on a DIN rail or mounting plate. Use spring-loaded terminals for secure wire connections. Ensure the 24V DC coil voltage matches your control circuit. Follow standard IEC installation practices and consult the manufacturer's manual for torque values.

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 17 A, 24V DC Coil (MPN 3RT20252KB40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: Yes; Wire Termination Type: Spring Loaded.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 17 A, 24V DC Coil (MPN 3RT20252KB40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: Yes; Wire Termination Type: Spring Loaded.
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 12 A, 24V DC Coil (MPN 3RT20172FB42). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: Yes; Wire Termination Type: Spring Loaded.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 12 A, 24V DC Coil (MPN 3RT20172FB42). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: Yes; Wire Termination Type: Spring Loaded.
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 25 A, 24V AC Coil (MPN 3RT20262AC20). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 25 A, 24V AC Coil (MPN 3RT20262AC20). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 25 A, 24V DC Coil (MPN 3RT20261KB40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: Yes.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 25 A, 24V DC Coil (MPN 3RT20261KB40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: Yes.
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 12 A, 24V DC Coil (MPN 3RT20172KB41). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: Yes; Wire Termination Type: Spring Loaded.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 12 A, 24V DC Coil (MPN 3RT20172KB41). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: Yes; Wire Termination Type: Spring Loaded.
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 16 A, 24V DC Coil (MPN 3RT20182BB42). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 16 A, 24V DC Coil (MPN 3RT20182BB42). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.

More from Siemens

View all Siemens parts →
SIEMENS IEC Magnetic Contactor: Non-Reversing, 4 Poles, 4NO Contacts, 16 A, 240V AC Coil (MPN 3RT23271AP60). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.
Siemens
SIEMENS IEC Magnetic Contactor: Non-Reversing, 4 Poles, 4NO Contacts, 16 A, 240V AC Coil (MPN 3RT23271AP60). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.
SIEMENS IEC Magnetic Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 25 A, 220V AC Coil (MPN 3RT20261AN20). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.
Siemens
SIEMENS IEC Magnetic Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 25 A, 220V AC Coil (MPN 3RT20261AN20). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 25 A, 24V DC Coil (MPN 3RT20262BB44). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 25 A, 24V DC Coil (MPN 3RT20262BB44). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 12 A, 120V AC Coil (MPN 3RT20172AK62). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 12 A, 120V AC Coil (MPN 3RT20172AK62). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.
SIEMENS IEC Magnetic Contactor: Non-Reversing, 4 Poles, 2NO/2NC Contacts, 9 A, 24V DC Coil (MPN 3RT25161BB40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.
Siemens
SIEMENS IEC Magnetic Contactor: Non-Reversing, 4 Poles, 2NO/2NC Contacts, 9 A, 24V DC Coil (MPN 3RT25161BB40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 17 A, 24V DC Coil (MPN 3RT20252BB40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 17 A, 24V DC Coil (MPN 3RT20252BB40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No; Wire Termination Type: Spring Loaded.
SIEMENS IEC Power Contactor: Non-Reversing, 4 Poles, 4NO Contacts, 12 A, 12V DC Coil (MPN 3RT23171BA40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.
Siemens
SIEMENS IEC Power Contactor: Non-Reversing, 4 Poles, 4NO Contacts, 12 A, 12V DC Coil (MPN 3RT23171BA40). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.
SIEMENS IEC Magnetic Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 80 A, 208V AC Coil (MPN 3RT20381AM20). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.
Siemens
SIEMENS IEC Magnetic Contactor: Non-Reversing, 3 Poles, 3NO Contacts, 80 A, 208V AC Coil (MPN 3RT20381AM20). Key specifications — Brand: SIEMENS; Integrated Surge Suppression: No.