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Siemens 3RT1044-3AG16 — Contactors

Siemens 3RT1044-3AG16 SIRIUS Power Contactor, 30 kW AC-2 at

MPN3RT1044-3AG16

Siemens SIRIUS power contactor, Size S3, 3RT1044-3AG16, screw-type terminals, 30 kW AC-2 at 400 V, 50/60 Hz, snap-on 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

3RT1044-3AG16 — Identification
ParameterValue
Contactor frame sizeS3
3RT1044-3AG16 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V55 A
Rated value @ 400 V3 A
Rated value @ 500 V37 kW
Rated value @ 690 V18.6 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1044-3AG16 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz100 V
3RT1044-3AG16 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1044-3AG16 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 250 A
Short-circuit coordination type 2, fusefuse gL/gG: 125 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1044-3AG16 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (2.5 ... 16 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm and 75 mm standard mounting rail
Side-by-side mountingYes
3RT1044-3AG16 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1044-3AG16 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1044-3AG16 — Mechanical
ParameterValue
Width90 mm
Height146 mm
Depth139 mm
3RT1044-3AG16 — Specifications
ParameterValue
At AC10 ... 19 ms

Product details

At 500 V it delivers 37 kW, and at 690 V it still manages 18.6 kW, giving flexibility for higher-voltage motor circuits common in European and export panels. That's a generous wire range for a Size S3 frame — enough for the full rated current without needing a terminal adapter. The auxiliary contact block (not included in this order code) shares the same screw-clamp style, so the entire contactor row terminates with the same tooling.

The 90 mm width and 146 mm height fit a standard 8-module enclosure row; side-by-side mounting is permitted, so you can gang multiple contactors without a gap for cooling, as long as the ambient stays within the -25 to +60 °C operating range. IP20 on the front with a cover or box terminal keeps fingers out; the terminal body itself is IP00, so it expects enclosure protection.

Frequently asked questions

What is the closest functional second-source — the 3RT1044-1FB46?

The 3RT1044-1FB46 is the spring-cage terminal variant of the same S3 frame and same AC-2 motor rating. The mounting footprint, coil voltage, and auxiliary contact compatibility are identical. The difference is wiring: screw terminals on the -3AG16 versus spring-cage on the -1FB46. If your panel is already wired with ferruled conductors and you prefer tool-less insertion, the -1FB46 is a direct mechanical swap. If your installers are set up for screw-clamp torque specs, stick with the -3AG16.

What is the depth of the 3RT1044-3AG16?

139 mm from the mounting surface to the furthest projection (typically the arc chute or auxiliary contact cover). That's within the standard 160 mm deep enclosure profile for a Size S3 contactor.

What is the solid conductor range for the main terminals?

The screw terminals accept solid conductors from 2x 0.25 mm² up to 2x 2.5 mm². For stranded wire, the range extends to 2x 50 mm², which covers the full rated current without paralleling.

MPN
3RT1044-3AG16