Siemens 3G-OTH-41955 — Technical Specifications

Name: Siemens 3G-OTH-41955 SIEMENS Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC, Frame Size S0, 34 A – 40 A (MPN 3RU21264FB0). 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: None (Relay Includes Integrated Bimetallic Elements).
Brand: Siemens

The SIEMENS Overload Relay: Thermal Protection (MPN 3RU21264FB0) is an IEC thermal overload relay in Frame Size S0, designed for use with SIRIUS contactors of the same frame size. It features a 1NO/1NC auxiliary contact form, screw terminals, and a maximum voltage rating of 690V AC. The relay includes integrated bimetallic elements, eliminating the need for separate thermal units, and does not offer phase loss sensitivity.

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Technical Specifications

Parameter	Value
Type	1NO/1NC, Frame Size S0, 34 A – 40 A
Brand	SIEMENS
Poles	3
Frame Size	S0
Compatible Contactors	Frame Size S0
Auxiliary Contact Form	1NO/1NC
Maximum Voltage Rating	690V AC
Phase Loss Sensitivity	No
Thermal Units Required	None (Relay Includes Integrated Bimetallic Elements)
Manufacturer Part Number	3RU21264FB0
Terminal Connection Type	Screw Terminals
Compatible Contactor Series	SIRIUS