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Siemens Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC - IEC Electronic Overload Relays
SiemensIEC Electronic Overload Relays

Siemens Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC

The SIEMENS Overload Relay is an IEC electronic protection device with 2 poles and a 1NO/1NC auxiliary contact form, housed in Frame Size A1. It features a maximum voltage rating of 690V AC and screw terminals, and…

SKU 3G-OTH-44750

Brand
Siemens
Item
Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC
Category
IEC Electronic Overload Relays
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Technical Specifications

Siemens
Manufacturer Part Number
3UB88234DW2
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 2 poles and a 1NO/1NC auxiliary contact form, housed in Frame Size A1. It features a maximum voltage rating of 690V AC and screw terminals, and is compatible with Frame Size A1 contactors from the Class 48 Overload Relays series. Thermal units are not applicable to this electronic type overload relay.

Frequently Asked Questions

What is the SIEMENS 3UB88234DW2 overload relay used for?

The SIEMENS 3UB88234DW2 is an IEC electronic overload relay that protects motors from overcurrent and phase loss. It is used in industrial control panels and machinery where precise, adjustable protection is needed, and it integrates with Frame Size A1 contactors from the Class 48 series.

What are the specifications of the SIEMENS 3UB88234DW2 overload relay?

This SIEMENS overload relay has 2 poles, a 1NO/1NC auxiliary contact form, and a maximum voltage rating of 690V AC. It uses screw terminals, fits Frame Size A1, and is compatible with Class 48 Overload Relays contactors. Thermal units are not required as it is an electronic type.

Where to buy the SIEMENS 3UB88234DW2 overload relay worldwide?

3G Electric supplies the SIEMENS 3UB88234DW2 overload relay worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this electronic protection device.

How to select the correct SIEMENS overload relay for a motor?

To select the correct SIEMENS overload relay, match the frame size (A1) to your contactor and verify the motor full-load current falls within the relay's adjustment range. For electronic types like the 3UB88234DW2, ensure the supply voltage and auxiliary contact configuration (1NO/1NC) meet your control circuit requirements.

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, 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.
Siemens
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.
SIEMENS Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC, Frame Size S0 (MPN 3RB31234NB0). 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 (MPN 3RB31234NB0). 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.