Skip to main content
Siemens 3RT1446-1AF00 — Contactors

Siemens 3RT1446-1AF00 SIRIUS Power Contactor, S3, 70mm

MPN3RT1446-1AF00

Siemens SIRIUS 3RT1446-1AF00 power contactor, size S3, 70 mm width, screw-type terminals, AC-1 50 kW at 230 V, AC-3 29.9 kW at 500 V, 1 000 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

3RT1446-1AF00 — Identification
ParameterValue
Contactor frame sizeS3
3RT1446-1AF00 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 500 V29.9 kW
Rated value @ 690 V38.2 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
3RT1446-1AF00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz110 V
3RT1446-1AF00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1446-1AF00 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 250 A
Short-circuit coordination type 2, fuseFuse gR: 250 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1446-1AF00 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, solid or stranded2x (2.5 ... 16 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
3RT1446-1AF00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1446-1AF00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1446-1AF00 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth139 mm
3RT1446-1AF00 — Specifications
ParameterValue
At AC10 ... 25 ms

Product details

Rated insulation voltage is 1 000 V, and the contactor carries AC-1 resistive ratings of 50 kW at 230 V (at 60 °C) and 148 kW at 690 V (at 60 °C). For motor duty, AC-3 ratings reach 29.9 kW at 500 V and 38.2 kW at 690 V. Mechanical life is listed at 10 000 000 cycles typical, and the operating temperature range is -25 to +60 °C.

Sizing and duty-cycle notes

The AC-1 resistive rating at 230 V is 50 kW at 60 °C, and at 690 V it reaches 148 kW at 60 °C — these are the numbers to use for heater or lighting banks, not the motor-duty figures. Coil pick-up and drop-out times at AC are 10 to 25 ms.

The contactor is 70 mm wide, 146 mm high, and 139 mm deep. Side-by-side mounting is permitted, which saves rail space in dense panels. Screw terminals accept solid conductors from 0.5 to 4 mm² (two per clamp) and stranded conductors from 10 to 50 mm² (two per clamp). For the main current circuit, minimum permissible cross-section at 40 °C is 50 mm²; at 60 °C it drops to 35 mm².

Frequently asked questions

Where can I buy 3RT1446-1AF00 and what is the lead time?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

What is the closest functional second-source for 3RT1446-1AF00?

The peer 3RT5046-1AM00 is a similar SIRIUS power contactor in the same size S3 frame, but it uses a different coil voltage and auxiliary configuration. Verify the coil rating and auxiliary contact arrangement before substituting.

Will 3RT1446-1AF00 drop into a panel specified around 3RT1044-1FB46?

The 3RT1446-1AF00 is a size S3 contactor (70 mm wide) while the 3RT1044-1FB46 is a size S2 (55 mm wide). The footprint and mounting rail are different — it will not drop in without panel modifications.

What compliance documentation does this brand provide for 3RT1446-1AF00?

The part carries a RoHS substance prohibition date of May 1, 2012, indicating compliance with the EU RoHS directive. Standard Siemens SIRIUS documentation includes the declaration of conformity and CE marking.

MPN
3RT1446-1AF00