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Siemens 3RU2136-4HD0 — Overload Relays

Siemens 3RU2136-4HD0 SIRIUS Overload Relay, CLASS 10

MPN3RU2136-4HD0
Active

Siemens SIRIUS 3RU2136-4HD0 thermal overload relay, CLASS 10, S2 size, 22 kW at 400 V, 50 A at 480 V, screw-type terminals, contactor mounting.

StockContact for availability
Lead timeIn Stock wk
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RU2136-4HD0 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationthermal overload relay
Frame size (overload relay)S2
Combinable contactor sizesS2
Reference code (IEC 81346-2)F

Protection & Trip

3RU2136-4HD0 — Protection & Trip
ParameterValue
Overload current setting range40 ... 50 A
Trip classCLASS 10
Overload release typethermal

Electrical (main circuit)

3RU2136-4HD0 — Electrical (main circuit)
ParameterValue
Rated operational current50 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

Auxiliary contacts

3RU2136-4HD0 — 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

Connection & Mounting

3RU2136-4HD0 — Connection & Mounting
ParameterValue
Mounting / fastening methodContactor mounting
Mounting positionany
Main-circuit connector arrangementTop and bottom
Auxiliary/control circuit connection typespring-loaded terminals
Removable aux./control terminalNo
Conductor cross-section: solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section: finely stranded with ferrule2x (0.5 ... 1.5 mm²)
Conductor range (AWG), main contacts2x (18 ... 2), 1x (18 ... 1)
Conductor range (AWG), auxiliary contacts2x (20 ... 14)

Environmental

3RU2136-4HD0 — 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

Mechanical

3RU2136-4HD0 — Mechanical
ParameterValue
Width55 mm
Height90 mm
Depth105 mm

Product details

CLASS 10 trip and motor ratings

The 3RU2136-4HD0: At 690 V it handles 45 kW. These are the AC-3e motor switching ratings — the values that matter for sizing to a specific motor nameplate.

Mounts directly to the contactor — no DIN rail required. The S2 size mates with the corresponding SIRIUS contactor frame. Fastening uses M6 screws for the main circuit connections. The auxiliary switch is integrated and uses Pozidriv PZ 2 screwdriver tips with a 5–6 mm shaft diameter.

Auxiliary contact ratings

The integrated auxiliary contact handles 2 A at 24 V, 3 A at 120 V, and 2 A at 230 V AC. For DC switching: 0.3 A at 60 V, 0.22 A at 110 V or 125 V, and 0.11 A at 220 V. These are the contact ratings for the trip-indication circuit — match them to the PLC input or signal lamp load.

Environmental range and compliance

Operates from -40 to +70 °C with temperature compensation active across -40 to +60 °C — the relay adjusts its trip curve to ambient so motor protection stays accurate regardless of panel temperature. The relay carries a substance prohibitance date of October 15, 2014, indicating RoHS compliance per Siemens documentation.

Sourced through authorized distribution; quoted to order against the BOM quantity. The 3RU2136-4HD0 carries a note for message "Tripped" — this is the auxiliary contact signal that indicates the relay has operated. Useful for wiring a remote trip indication into the control system.

Frequently asked questions

How do I get current pricing and availability for 3RU2136-4HD0?

Submit an RFQ through this listing — the relay is sourced through authorized distribution channels.

What is 3RU2136-4HD0's listed note for message "Tripped"?

The relay carries a note for message "Tripped" — this is the signal from the integrated auxiliary contact that indicates the overload relay has operated. It's the contact that closes (or opens) when the thermal element trips.

MPN
3RU2136-4HD0