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Siemens 3RU1116-1KB0 — Overload Relays

Siemens 3RU1116-1KB0 SIRIUS Thermal Overload Relay, Size S00

MPN3RU1116-1KB0

Siemens SIRIUS thermal overload relay, Size S00, 3-pole, screw-type terminals, Trip Class 10, IP20 front, ATEX approved, 78 mm depth.

$48.01Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RU1116-1KB0 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationthermal overload relay
Frame size (overload relay)S00
Combinable contactor sizesS00
3RU1116-1KB0 — Protection & Trip
ParameterValue
Overload current setting range9 ... 12 A
Trip classCLASS 10
3RU1116-1KB0 — Electrical (main circuit)
ParameterValue
Poles (main circuit)3
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)6.6 W
Per pole2.2 W
3RU1116-1KB0 — Auxiliary contacts
ParameterValue
Auxiliary contacts: NO1
Auxiliary contacts: NC1
Auxiliary contacts: CO (changeover)0
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
3RU1116-1KB0 — 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
Auxiliary/control circuit connection typescrew-type terminals
Removable aux./control terminalNo
Conductor cross-section: solid2x (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 (20 ... 16), 2x (18 ... 14), 2x 12
Conductor range (AWG), auxiliary contacts2x (20 ... 16), 2x (18 ... 14)
3RU1116-1KB0 — Environmental
ParameterValue
Operating temperature-20 ... +70 °C
Storage temperature-55 ... +80 °C
Transport temperature-55 ... +80 °C
Relative humidity, operating100 %
Max. installation altitude2 000 m
Shock resistance8g / 10 ms
3RU1116-1KB0 — Mechanical
ParameterValue
Width45 mm
Height87 mm
Depth78 mm
3RU1116-1KB0 — Specifications
ParameterValue
Type Of ProtectionDMT 98 ATEX G 001

Product details

The Siemens 3RU1116-1KB0 is a SIRIUS-brand thermal overload relay in Size S00, designed for three-phase motor protection. It mounts directly to a contactor and provides Class 10 trip response.

This relay is sized for the SIRIUS S00 frame and snaps onto the contactor without additional DIN-rail hardware. Clearance requirements: 0 mm upwards, forwards, and backwards; 6 mm at the sides; 0 mm downwards — so it can be stacked directly against adjacent devices on three sides, saving rail space. Dimensions are 45 mm wide, 87 mm high, and 78 mm deep — the depth figure matters for enclosure depth planning, especially when the contactor sits behind a door or cover. Wire terminations use screw-type terminals on both main and auxiliary circuits, accepting solid or ferruled stranded conductors: 2× (0.5…1.5 mm²) and 2× (0.75…2.5 mm²) per clamp, or AWG equivalents 2× (20…16) and 2× (18…14). The auxiliary circuit accepts the same range.

Sourcing and fit decision

It mates mechanically and electrically with SIRIUS S00 contactors — no adapter or rewiring needed.

Frequently asked questions

What is the closest functional second-source or alternative?

The 3RT1023-1AL20 is a SIRIUS contactor in the same S00 frame, not a direct overload relay replacement. For a direct overload relay substitute within the SIRIUS family, any S00-frame thermal overload relay with Class 10 and screw terminals will fit the same contactor footprint — but the 3RU1116-1KB0 is the current-production ATEX-rated option.

What is the depth of the 3RU1116-1KB0?

The depth is 78 mm, which is the dimension from the mounting surface to the furthest protruding point (typically the reset button or terminal cover).

What wire sizes does the 3RU1116-1KB0 accept?

Main and auxiliary screw terminals accept solid or ferruled stranded conductors: 2× (0.5…1.5 mm²) and 2× (0.75…2.5 mm²) per clamp, or AWG equivalents 2× (20…16) and 2× (18…14).

Will the 3RU1116-1KB0 drop into a panel specified for a 3RT1023-1AL20 contactor?

Yes, both are SIRIUS S00 frame devices. The 3RU1116-1KB0 mounts directly onto a 3RT1023-1AL20 contactor without additional hardware or rewiring, provided the panel has the 78 mm depth clearance.

MPN
3RU1116-1KB0