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Siemens 3UB81234CW2 IEC Electronic Overload Relay - IEC Electronic Overload Relays
SiemensIEC Electronic Overload Relays

Siemens 3UB81234CW2 IEC Electronic Overload Relay

The SIEMENS Overload Relay is an IEC electronic protection device with 3 poles and a 1NO/1NC auxiliary contact form, designed for Frame Size A1. It features a maximum voltage rating of 690V AC and screw terminals…

SKU 3G-OTH-44567

Brand
Siemens
Item
3UB81234CW2 IEC Electronic Overload Relay
Category
IEC Electronic Overload Relays
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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
3UB81234CW2
Frame Size
A1
Compatible Contactors
Frame Size A1
Auxiliary Contact Form
1NO/1NC
Maximum Voltage Rating
690V AC
Thermal Units Required
Not Applicable to Electronic Type Overload Relays
Terminal Connection Type
Screw Terminals
Compatible Contactor Series
Class 48 Overload Relays

Technical Documents

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

Product Description

The SIEMENS Overload Relay is an IEC electronic protection device with 3 poles and a 1NO/1NC auxiliary contact form, designed for Frame Size A1. It features a maximum voltage rating of 690V AC and screw terminals, compatible with Class 48 Overload Relays and Frame Size A1 contactors. Thermal units are not applicable to this electronic type overload relay.

Frequently Asked Questions

What is the SIEMENS Overload Relay 3UB81234CW2 used for?

The SIEMENS Overload Relay 3UB81234CW2 is an IEC electronic protection device used to protect motors from overload and phase loss. It is designed for Frame Size A1 contactors and Class 48 Overload Relays, with a maximum voltage rating of 690V AC and screw terminals.

What are the specifications of the SIEMENS Overload Relay 3UB81234CW2?

The SIEMENS Overload Relay 3UB81234CW2 has 3 poles, a 1NO/1NC auxiliary contact form, and a maximum voltage rating of 690V AC. It uses screw terminals, is compatible with Frame Size A1 contactors and Class 48 Overload Relays, and does not require thermal units as it is an electronic type.

Where to buy the SIEMENS Overload Relay 3UB81234CW2 worldwide?

You can source the SIEMENS Overload Relay 3UB81234CW2 worldwide through 3G Electric. As a global industrial equipment distributor, 3G Electric handles full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to select the correct SIEMENS Overload Relay for a motor?

To select the correct SIEMENS Overload Relay, match the frame size (A1) and voltage rating (690V AC) to your contactor. For the 3UB81234CW2, ensure your motor's full-load current falls within the relay's adjustment range. Consult the Siemens technical manual for precise settings.

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 iec electronic overload relays. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
IEC electronic overload relay for motor protection against overcurrent and phase loss. Three-pole design with 1 normally open and 1 normally closed auxiliary contact. Rated for 690V AC, with screw terminal connections. Compatible with Frame Size A contactors and Class 48 overload relays. No thermal units required
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IEC electronic overload relay for motor protection against overcurrent and phase loss. Three-pole design with 1 normally open and 1 normally closed auxiliary contact. Rated for 690V AC, with screw terminal connections. Compatible with Frame Size A contactors and Class 48 overload relays. No thermal units required
IEC electronic overload relay for motor protection against overcurrent and phase loss. Three-pole unit with screw terminals, frame size A1, current range 10 A to 40 A, and maximum voltage 690V AC. Auxiliary contact form 1NO/1NC. No thermal units required. Compatible with Class 14 starters and contactors of frame size A1
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IEC electronic overload relay for motor protection against overcurrent and phase loss. Three-pole unit with screw terminals, frame size A1, current range 10 A to 40 A, and maximum voltage 690V AC. Auxiliary contact form 1NO/1NC. No thermal units required. Compatible with Class 14 starters and contactors of frame size A1
IEC electronic overload relay with three poles, frame size A, and adjustable current range of 0.75 A to 3.4 A. Features one normally open and one normally closed auxiliary contact, screw terminals, and a maximum voltage rating of 690V AC. Used for motor overload and phase loss protection in industrial control applications
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IEC electronic overload relay for motor protection against overload and phase loss. Rated 3-12 A, 690V AC, with screw terminals and 1NO/1NC auxiliary contacts. Compatible with Frame Size A1 contactors and Class 14 starters. No thermal units required
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IEC electronic overload relay for three-phase motor protection against overcurrent and phase loss. Three poles, frame size A1, current range 5.5 A to 22 A. Auxiliary contact form 1NO/1NC, maximum voltage rating 690V AC, screw terminals. Compatible with Class 14 Starters and frame size A1 contactors. No thermal units required
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IEC electronic overload relay for three-phase motor protection against overcurrent and phase loss. Three poles, frame size A1, current range 5.5 A to 22 A. Auxiliary contact form 1NO/1NC, maximum voltage rating 690V AC, screw terminals. Compatible with Class 14 Starters and frame size A1 contactors. No thermal units required
IEC electronic overload relay with 3 poles, providing motor protection against overcurrent and phase loss. Features 1 normally open and 1 normally closed auxiliary contact, rated for 690V AC. Designed for Frame Size B contactors and Class 48 overload relays, with screw terminal connections. No thermal units required
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IEC electronic overload relay with 3 poles, providing motor protection against overcurrent and phase loss. Features 1 normally open and 1 normally closed auxiliary contact, rated for 690V AC. Designed for Frame Size B contactors and Class 48 overload relays, with screw terminal connections. No thermal units required

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IEC electronic overload relay for motor protection against overcurrent and phase loss. Two-pole design with 1 normally open and 1 normally closed auxiliary contact. Rated for 690V AC, with screw terminals. Compatible with Frame Size A contactors and Class 48 overload relays. Thermal units not required
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