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Siemens 3RT7045-1AP00 — Contactors

Siemens 3RT7045-1AP00 Contactor S3, 3-Pole, AC Coil, 690 V

MPN3RT7045-1AP00

Siemens SIRIUS 3RT7045-1AP00, Size S3 contactor, 3-pole main contacts, AC control supply, screw terminals, IP20 front, 690 V insulation voltage.

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

3RT7045-1AP00 — Identification
ParameterValue
Contactor frame sizeS3
3RT7045-1AP00 — Ratings & Performance
ParameterValue
Rated value @ 400 V3 A
Rated value @ 690 V1 A
Rated value @ 230 V6 A
3RT7045-1AP00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.27
Rated value @ 50 Hz230 V
3RT7045-1AP00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliabilityacceptability for PLC control (17 V, 5 mA)
3RT7045-1AP00 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegL/gG NH 3NA: 200 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT7045-1AP00 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm and 75 mm standard mounting rail
Side-by-side mountingYes
3RT7045-1AP00 — Environmental
ParameterValue
Operating temperature range-10 ... +55 °C
Storage temperature range-25 ... +70 °C
Installation altitude, max.2 000 m
3RT7045-1AP00 — Mechanical
ParameterValue
Width70 mm
Height148 mm
Depth139 mm

Product details

The Siemens 3RT7045-1AP00 is a Size S3 3-pole contactor from the SIRIUS family, designed for switching three-phase motor loads in control panels.

The AC-3 maximum operating rate is 800 switching cycles per hour; the AC-4 maximum is 250 1/h. That means this contactor is specced for motor starting duty (AC-3) at a pace typical of conveyors and pumps, not for high-frequency jogging or reversing (AC-4) where the rate drops to a quarter. For the auxiliary contact circuit at 230 V rated value the current is 6 A; at 400 V it is 3 A; at 690 V it is 1 A. These are the switching capacities for the built-in auxiliary contacts — not the main power path — and they determine what control loads (pilot lights, contactor coils, small relays) the auxiliary circuit can handle at different line voltages.

Environmental and coordination limits

For type of coordination 1, the required upstream fuse is a gL/gG NH 3NA rated 200 A. Installation altitude is limited to 2000 m above sea level.

Frequently asked questions

Will 3RT7045-1AP00 drop into a panel that was specified around 3RT5046-1AM00 without rewiring?

Both are SIRIUS contactors but in different frame sizes — the 3RT7045-1AP00 is Size S3, while the 3RT5046-1AM00 is a smaller frame. Panel cutouts and DIN-rail spacing may differ; verify the mounting footprint and terminal layout before substituting.

MPN
3RT7045-1AP00