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

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

The SIEMENS Overload Relay: Electronic Protection is an IEC electronic overload relay with a 1NO/1NC auxiliary contact form, a maximum voltage rating of 690V AC, and screw terminals. It is designed for Frame Size B…

SKU 3G-OTH-44968

Brand
Siemens
Item
Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC, Frame Size B
Category
IEC Electronic Overload Relays
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Technical Specifications

Siemens
Manufacturer Part Number
3UB81334FW2
Type
1NO/1NC, Frame Size B, 13 A – 52 A
Poles
3
Frame Size
B
Compatible Contactors
Frame Size B
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 14 Starters
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS Overload Relay: Electronic Protection is an IEC electronic overload relay with a 1NO/1NC auxiliary contact form, a maximum voltage rating of 690V AC, and screw terminals. It is designed for Frame Size B and is compatible with Class 14 Starters and Frame Size B contactors. Thermal units are not applicable to this electronic type overload relay.

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 A1, 3 A – 12 A (MPN 3UB88234CW2). Key specifications — Brand: SIEMENS; Auxiliary Contact Form: 1NO/1NC; Compatible Contactor Series: Class 14 Starters; Terminal Connection Type: Screw Terminals; Frame Size: A1; Maximum Voltage Rating: 690V AC; Thermal Units Required: Not Applicable to Electronic Type Overload Relays; Compatible Contactors: Frame Size A1.
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Siemens
SIEMENS Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC, Frame Size S6 (MPN 3RB21534FC2). Key specifications — Brand: SIEMENS; Auxiliary Contact Form: 1NO/1NC; Compatible Contactor Series: SIRIUS; Terminal Connection Type: Screw Terminals; Frame Size: S6; Maximum Voltage Rating: 1000V 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 S00, 1 A – 4 A (MPN 3RB31134PB0). Key specifications — Brand: SIEMENS; Auxiliary Contact Form: 1NO/1NC; Compatible Contactor Series: SIRIUS; Terminal Connection Type: Screw Terminals; Frame Size: S00; 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 S00, 1 A – 4 A (MPN 3RB31134PB0). Key specifications — Brand: SIEMENS; Auxiliary Contact Form: 1NO/1NC; Compatible Contactor Series: SIRIUS; Terminal Connection Type: Screw Terminals; Frame Size: S00; Maximum Voltage Rating: 690V AC; Phase Loss Sensitivity: No; Thermal Units Required: Not Applicable to Electronic Type Overload Relays.