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Siemens 3RU5136-4GB0 — Overload Relays

Siemens 3RU5136-4GB0 SIRIUS Overload Relay, 45 A, Class 10

MPN3RU5136-4GB0

Siemens SIRIUS thermal overload relay, 3RU5136-4GB0, 45 A rated current, Trip Class 10, adjustable 36–45 A, for S2 contactor mounting.

Siemens 3RU5136-4GB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RU5136-4GB0 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationThermal overload relay
Combinable contactor sizesS2
3RU5136-4GB0 — Protection & Trip
ParameterValue
Overload current setting range36 ... 45 A
Trip classCLASS 10
Overload release typethermal
3RU5136-4GB0 — Electrical (main circuit)
ParameterValue
Rated operational current45 A
Poles (main circuit)3
Rated operating frequency50 ... 60 Hz
Rated insulation voltage (AC, pollution degree 3)690 V
Rated surge withstand voltage6 kV
Main current circuitscrew-type terminals
Power loss at rated current (hot)15.6 W
Per pole5.2 W
3RU5136-4GB0 — Auxiliary contacts
ParameterValue
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 230 V2 A
3RU5136-4GB0 — Connection & Mounting
ParameterValue
Mounting / fastening methodContactor mounting
Mounting positionwith vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back
Main-circuit connector arrangementTop and bottom
Auxiliary/control circuit connection typescrew-type terminals
Conductor cross-section: solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section: finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
3RU5136-4GB0 — Environmental
ParameterValue
Operating temperature-20 ... +70 °C
Transport temperature-55 ... +80 °C
Relative humidity, operating0 ... 100 %
Max. installation altitude2 000 m
3RU5136-4GB0 — Mechanical
ParameterValue
Width55 mm
Height105 mm
Depth118 mm

Product details

What this 45 A overload relay does on the line

The Siemens 3RU5136-4GB0 is a SIRIUS thermal overload relay rated for 45 A operational current, adjustable from 36 to 45 A via the dial. It mounts directly onto a SIRIUS S2 contactor (screw-type terminals top and bottom for the main circuit), saving panel space and wiring time. The 3-pole design handles three-phase motor loads up to 690 V, 50/60 Hz.

Mounting and integration into a motor starter

This relay fastens directly onto the contactor via the S2 interface — no separate DIN-rail footprint needed, though the assembly can be mounted on a vertical surface with ±135° rotation or ±45° tilt. Side spacing to grounded parts is 6 mm minimum. The main circuit accepts 2× (0.5…1.5 mm²) solid/stranded or 2× (0.75…2.5 mm²) finely stranded with ferrules; AWG 18–3 for the mains, 20–14 for auxiliaries. Tightening torque for the main screw terminals is 3–5 N·m.

Frequently asked questions

How to install 3RU5136-4GB0 on a contactor?

It fastens directly onto a SIRIUS S2 contactor via the mounting interface. Main circuit terminals accept screw-type connections top and bottom; tighten to 3–5 N·m.

Where can I buy 3RU5136-4GB0 available via RFQ confirmation?

This part is sourced and quoted to order. Availability and pricing are confirmed at quote time.

MPN
3RU5136-4GB0