The Siemens 3RB1246-1QG21 is a solid-state overload relay with integrated thermistor protection, covering a current range of 6.3 to 25 A on a 110 to 120 V AC control supply at 50/60 Hz. It includes internal earth-fault detection and provides bistable outputs: 1NO/1NC for overload/thermistor and 1NO/1NC for earth fault. This class of relay protects motors against overload, phase loss, and thermistor-triggered overtemperature, and adds ground-fault monitoring in a single package — reducing panel wiring and component count compared to separate relay and ground-fault modules.
Siemens 3RB1246-1QG21 Solid State Overload Relay, 6.3-25 A,
MPN3RB1246-1QG21
Siemens 3RB1246-1QG21 solid-state overload relay, 6.3 to 25 A, AC 110-120V 50/60Hz, with integrated thermistor protection and internal earth-fault detection.
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Weight | 0.00 kgs |
Product details
Frequently asked questions
What are the key ratings of the 3RB1246-1QG21?
The relay is rated for 6.3 to 25 A motor protection, operates on AC 110-120V 50/60 Hz control voltage, and includes integrated thermistor protection and internal earth-fault detection with bistable output contacts (1NO/1NC for overload/thermistor, 1NO/1NC for earth fault).
MPN
3RB1246-1QG21