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Siemens 3RU1126-1GD0 — Overload Relays

Siemens 3RU1126-1GD0 SIRIUS Thermal Overload Relay, Class 10

MPN3RU1126-1GD0

Siemens SIRIUS thermal overload relay, 3RU1126-1GD0, Class 10, S0 size, contactor mounting, screw terminals, 690 V max, IP20 front, ATEX approved.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RU1126-1GD0 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationthermal overload relay
Frame size (overload relay)S0
Combinable contactor sizesS0
3RU1126-1GD0 — Protection & Trip
ParameterValue
Trip classCLASS 10
3RU1126-1GD0 — Electrical (main circuit)
ParameterValue
Poles (main circuit)3
Rated surge withstand voltage6 kV
Main current circuitscrew-type terminals
3RU1126-1GD0 — Auxiliary contacts
ParameterValue
Auxiliary contacts: NO1
Auxiliary contacts: NC1
Auxiliary switch short-circuit protection (required fuse)fuse gL/gG: 6 A, quick: 10 A
Switching current at 24 V1 A
Switching current at 110 V0.22 A
Switching current at 120 V3 A
Switching current at 125 V0.22 A
Switching current at 220 V0.11 A
Switching current at 230 V2 A
Switching current at 400 V1 A
3RU1126-1GD0 — Connection & Mounting
ParameterValue
Mounting positionwith vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back
Conductor cross-section: solid2x (0.5 ... 2.5 mm²)
Conductor cross-section: finely stranded with ferrule2x (0.5 ... 1.5 mm²)
3RU1126-1GD0 — Environmental
ParameterValue
Operating temperature-20 ... +70 °C
Storage temperature-55 ... +80 °C
Transport temperature-55 ... +80 °C
Relative humidity, operating100 %
Shock resistance8g / 10 ms
3RU1126-1GD0 — Mechanical
ParameterValue
Width45 mm
Height97 mm
Depth96 mm
3RU1126-1GD0 — Specifications
ParameterValue
Type Of ProtectionDMT 98 ATEX G 001

Product details

The screw-type terminals accept 2x (0.5…2.5 mm²) solid or 2x (0.5…1.5 mm²) finely stranded with ferrules, or 2x (16…12) / 2x (14…8) AWG — enough for motor branch circuits up to the S0 current range.

Mounts directly on a Siemens contactor of matching S0 frame size. The mounting position allows a vertical surface with ±135° rotation and ±45° tilt front-to-back, giving flexibility in tight enclosures. Shock rated at 8g for 10 ms. The relay carries ATEX protection type DMT 98 ATEX G 001 for use in potentially explosive gas atmospheres.

Clearances and approvals

Surge voltage resistance rated at 6 kV. Relative humidity tolerance is 100% during operation.

Frequently asked questions

Where can I buy 3RU1126-1GD0?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is the trip class of 3RU1126-1GD0?

Class 10 — it trips within 10 seconds at 7.2× the set current, matching standard induction motor starting profiles.

What is the maximum operating voltage for 3RU1126-1GD0?

Rated for main circuit voltages up to 690 V AC-3, covering 400 V and 480 V line-to-line systems.

What approvals does 3RU1126-1GD0 carry?

It carries ATEX protection type DMT 98 ATEX G 001 for explosive gas atmospheres. The front face is IP20 rated.

MPN
3RU1126-1GD0