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Siemens Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC - IEC Electronic Overload Relays
SiemensIEC Electronic Overload Relays

Siemens Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC

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
Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC
Category
IEC Electronic Overload Relays
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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
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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.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

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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SIEMENS Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC, Frame Size A, 0.25 A – 1 A (MPN 3UB88134AB2). Key specifications — Brand: SIEMENS; Auxiliary Contact Form: 1NO/1NC; Compatible Contactor Series: Class 48 Overload Relays; Terminal Connection Type: Screw Terminals; Frame Size: A; Maximum Voltage Rating: 690V AC; Thermal Units Required: Not Applicable to Electronic Type Overload Relays; Compatible Contactors: Frame Size A.
SIEMENS Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC, Frame Size S0, 6 A – 25 A (MPN 3RB31234QB0). Key specifications — Brand: SIEMENS; Auxiliary Contact Form: 1NO/1NC; Compatible Contactor Series: SIRIUS; Terminal Connection Type: Screw Terminals; Frame Size: S0; Maximum Voltage Rating: 690V AC; Phase Loss Sensitivity: No; Thermal Units Required: Not Applicable to Electronic Type Overload Relays.
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SIEMENS Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC, Frame Size S0, 6 A – 25 A (MPN 3RB31234QB0). Key specifications — Brand: SIEMENS; Auxiliary Contact Form: 1NO/1NC; Compatible Contactor Series: SIRIUS; Terminal Connection Type: Screw Terminals; Frame Size: S0; Maximum Voltage Rating: 690V AC; Phase Loss Sensitivity: No; Thermal Units Required: Not Applicable to Electronic Type Overload Relays.