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Siemens 3RU2136-4GB1 — Overload Relays

Siemens 3RU2136-4GB1 SIRIUS Thermal Overload Relay, CLASS 10

MPN3RU2136-4GB1
Active

Siemens SIRIUS thermal overload relay, 3RU2136-4GB1, CLASS 10, rated 690 V, 22 kW at 400 V, S2 size, screw terminals, stand-alone mount.

$66.04Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RU2136-4GB1 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationthermal overload relay
Frame size (overload relay)S2
Combinable contactor sizesS2
Reference code (IEC 81346-2)F
3RU2136-4GB1 — Protection & Trip
ParameterValue
Overload current setting range36 ... 45 A
Trip classCLASS 10
Overload release typethermal
3RU2136-4GB1 — 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 value (AC-3e), max.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
3RU2136-4GB1 — Auxiliary contacts
ParameterValue
Auxiliary contacts: NO1
Auxiliary contacts: NC1
Auxiliary contacts: CO (changeover)0
Auxiliary switch short-circuit protection (required fuse)fuse gG: 6 A, quick: 10 A
Switching current at 24 V2 A
Switching current at 60 V0.3 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
3RU2136-4GB1 — Connection & Mounting
ParameterValue
Mounting / fastening methodstand-alone installation
Mounting positionany
Main-circuit connector arrangementTop and bottom
Auxiliary/control circuit connection typescrew-type terminals
Removable aux./control terminalNo
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)
Conductor range (AWG), auxiliary contacts2x (20 ... 16), 2x (18 ... 14)
3RU2136-4GB1 — Environmental
ParameterValue
Operating temperature-40 ... +70 °C
Storage temperature-55 ... +80 °C
Transport temperature-55 ... +80 °C
Relative humidity, operating10 ... 95 %
Max. installation altitude2 000 m
3RU2136-4GB1 — Mechanical
ParameterValue
Width55 mm
Height105 mm
Depth117 mm

Product details

It trips on a CLASS 10 curve — meaning it will open the contactor within 10 seconds at a locked-rotor current seven times the full-load setting. That's the curve you want for standard induction motors driving pumps, fans, or conveyors where the start-up time is short. The relay is rated for main circuits up to 690 V, and at 400 V it handles 22 kW motor loads. It carries a 45 A rating at 480 V and 600 V, and 37 kW at 690 V. The auxiliary contacts are rated for 2 A at 24 V, 3 A at 120 V, and 1 A at 400 V — enough to signal a PLC input or a status lamp.

This relay is designed for stand-alone installation — it does not require a dedicated base or adapter. It mounts in any position, which helps when you're fitting it into a tight panel. The main circuit terminals accept screw-type connections, and the terminal screws take a Pozidriv PZ2 bit or a 5–6 mm diameter shaft. Dimensions are 55 mm wide, 105 mm tall, and 117 mm deep — a compact footprint for a size S2 relay, so it fits in a standard 55 mm DIN-rail slot if you're using an adapter base (not included). The auxiliary switch is integrated into the housing, no extra module needed.

Temperature compensation is active from –40 to +60 °C, so the trip curve stays accurate across the working range.

Frequently asked questions

What is the trip class of 3RU2136-4GB1?

It is CLASS 10, meaning it will trip within 10 seconds at a locked-rotor current seven times the full-load setting.

What is the depth of 3RU2136-4GB1?

The depth is 117 mm.

Does 3RU2136-4GB1 have RoHS compliance documentation?

Yes, the relay has a substance prohibition date of October 15, 2014, which indicates RoHS compliance.

MPN
3RU2136-4GB1