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Siemens 3RU2136-4AB0 — Overload Relays

Siemens 3RU2136-4AB0 SIRIUS Thermal Overload Relay, CLASS 10

MPN3RU2136-4AB0
Active

Siemens SIRIUS thermal overload relay, 3RU2136-4AB0, CLASS 10, 690 V rated, 7.5 kW at 400 V, size S2, contactor mounting.

$104.35Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RU2136-4AB0 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationthermal overload relay
Frame size (overload relay)S2
Combinable contactor sizesS2
Reference code (IEC 81346-2)F
3RU2136-4AB0 — Protection & Trip
ParameterValue
Overload current setting range11 ... 16 A
Trip classCLASS 10
Overload release typethermal
3RU2136-4AB0 — Electrical (main circuit)
ParameterValue
Rated operational current16 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)10.5 W
Per pole3.5 W
3RU2136-4AB0 — 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
3RU2136-4AB0 — Connection & Mounting
ParameterValue
Mounting / fastening methodContactor mounting
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), main contacts2x (18 ... 2), 1x (18 ... 1)
Conductor range (AWG), auxiliary contacts2x (20 ... 16), 2x (18 ... 14)
3RU2136-4AB0 — 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
3RU2136-4AB0 — Mechanical
ParameterValue
Width55 mm
Height90 mm
Depth105 mm

Product details

It is rated for a maximum of 690 V and delivers 7.5 kW at 400 V, with a rated operational current of 16 A at 480 V and 600 V.

CLASS 10 trip means the relay trips within 10 seconds at locked-rotor current. Ambient-compensated from -40 to +60 °C. Auxiliary switching is integrated, with a note for message "Tripped" — the relay provides a dedicated signal contact that changes state on overload, which can be wired into a PLC input or a local indicator. The auxiliary contact ratings cover common control voltages: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, 1 A at 400 V, and 0.75 A at 690 V. Dimensions are 55 mm wide, 90 mm high, and 105 mm deep — fits the standard S2 footprint. Wire capacity accepts 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded.

Frequently asked questions

What does the note 'for message Tripped' mean?

The relay has an integrated auxiliary switch that provides a dedicated signal contact that changes state when the relay trips due to overload. This can be used to send a 'Tripped' message to a PLC or indicator.

What compliance documentation is available for this relay?

The relay has a substance prohibitance date of 10/15/2014, indicating RoHS compliance as of that date. Additional compliance details (UL, IEC) are part of the standard Siemens documentation package available upon request.

MPN
3RU2136-4AB0