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Siemens 3RU7116-0KB0 — Overload Relays

Siemens 3RU7116-0KB0 SIRIUS Thermal Overload Relay, 1.25 A,

MPN3RU7116-0KB0

Siemens SIRIUS 3RU7116-0KB0 thermal overload relay, size S00, 1.25 A rated current, trip class 10, screw terminals, contactor mounting.

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

3RU7116-0KB0 — Identification
ParameterValue
Product brand nameSIRIUS
Product designationThermal overload relay
Frame size (overload relay)S00
Combinable contactor sizesS00
3RU7116-0KB0 — Protection & Trip
ParameterValue
Overload current setting range0.9 ... 1.25 A
Trip classCLASS 10
Overload release typethermal
3RU7116-0KB0 — Electrical (main circuit)
ParameterValue
Rated operational current1.25 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)5.7 W
Per pole1.9 W
3RU7116-0KB0 — Auxiliary contacts
ParameterValue
Switching current at 24 V3 A
Switching current at 230 V2 A
3RU7116-0KB0 — 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)
3RU7116-0KB0 — Environmental
ParameterValue
Operating temperature-20 ... +55 °C
Transport temperature-25 ... +70 °C
Relative humidity, operating0 ... 90 %
Max. installation altitude2 000 m
3RU7116-0KB0 — Mechanical
ParameterValue
Width45 mm
Height87 mm
Depth78 mm

Product details

It mounts directly onto a contactor of the same S00 frame size, forming a compact motor starter package for DIN-rail or panel assembly. Rated operational current is 1.25 A, with trip class 10 — meaning it will trip within 10 seconds at 7.2× the set current, fast enough to protect standard induction motors without nuisance tripping during start-up. Rated voltage is 690 V AC/DC, 50/60 Hz.

The 1.25 A rated current sets the upper limit of the adjustable overload range — this relay is sized for small motors, pumps, or fans drawing roughly 1 A full-load. Trip class 10 is the standard for general-purpose motor starting; if your application has a long acceleration time (centrifuges, high-inertia loads), you would typically step to class 20. Auxiliary contact ratings: 3 A at 24 V, 2 A at 230 V, and 1 A at 24 V DC-13 for the control circuit. These are the contacts that signal the contactor coil or PLC input on a trip event — verify your control voltage and load type against these numbers.

Fastens directly to a S00 contactor (contactor mounting) — no separate base required. Mounting position allows vertical surface with ±135° rotation and ±45° tilt front/back, giving flexibility in tight panels. Side spacing to grounded parts must be at least 6 mm. Accepts 2× (0.5…1.5 mm²) or 2× (0.75…2.5 mm²) solid/stranded, or finely stranded with ferrule. Terminal torque: 0.8…1.2 N·m for both main and auxiliary contacts.

Frequently asked questions

What are the key ratings for this overload relay?

Rated operational current 1.25 A, trip class 10, rated voltage 690 V AC/DC, 50/60 Hz. Auxiliary contacts rated 3 A at 24 V, 2 A at 230 V, and 1 A at 24 V DC-13.

What frame size is this relay and how does it mount?

Size S00, designed for direct contactor mounting onto a S00 Siemens contactor. Mounting position allows vertical surface with ±135° rotation and ±45° tilt.

What approvals or compliance documentation are available?

The evidence does not list specific approvals (UL, CSA, CE, etc.) for this order code. Standard Siemens SIRIUS documentation (RoHS, REACH, IEC) is typically available from the manufacturer upon request.

MPN
3RU7116-0KB0