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Siemens 3RT1046-3AC20 — Contactors

Siemens 3RT1046-3AC20 SIRIUS Power Contactor, 55 kW at 500 V

MPN3RT1046-3AC20

Siemens SIRIUS power contactor, size S3, 3RT1046-3AC20, 55 kW at 500 V AC-3, screw-type terminals, IP20 front, snap-on 35 mm DIN rail.

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

3RT1046-3AC20 — Identification
ParameterValue
Contactor frame sizeS3
3RT1046-3AC20 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V80 A
Rated value @ 400 V3 A
Rated value @ 500 V55 kW
Rated value @ 690 V25.4 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
3RT1046-3AC20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz24 V
3RT1046-3AC20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1046-3AC20 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 250 A
Short-circuit coordination type 2, fusefuse gL/gG: 160 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1046-3AC20 — 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
3RT1046-3AC20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1046-3AC20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1046-3AC20 — Mechanical
ParameterValue
Width70 mm
Height146 mm
Depth139 mm
3RT1046-3AC20 — Specifications
ParameterValue
At AC10 ... 25 ms

Product details

The Siemens SIRIUS 3RT1046-3AC20 is a size S3 power contactor rated for 55 kW at 500 V (AC-3) and 25.4 kW at 690 V. It uses screw-type terminals on the main circuit, accepting solid wire from 2x 0.25 to 2.5 mm² and stranded from 2x 10 to 50 mm². Pollution degree 3 applies, meaning the contactor is suited for industrial environments with conductive or dry non-conductive pollution.

Switching Capability and Duty Cycles

At 24 V the contactor switches 10 A; at 230 V it switches 6 A; at 400 V it switches 3 A. Maximum switching frequency varies by duty: 900 operations per hour at AC-1, 850 at AC-3, 350 at AC-2, and 250 at AC-4. Arcing time falls between 10 and 15 ms; total opening time (including arc) is 10 to 25 ms at AC.

Frequently asked questions

What is the 3RT1046-3AC20 depth?

The depth is 139 mm.

What solid wire size does 3RT1046-3AC20 accept?

It accepts 2x (0.25 to 2.5 mm²) solid wire on the main circuit terminals.

Where can I buy 3RT1046-3AC20?

It is sourced and quoted to order against an RFQ through independent distribution; availability and pricing confirmed at quote time.

Will 3RT1046-3AC20 drop into a panel specified for 3RT1044-1FB46?

Both are SIRIUS contactors, but the 3RT1046-3AC20 is size S3 while 3RT1044-1FB46 is a different size; panel fit and terminal layout must be verified. The 3RT1046-3AC20 uses screw terminals and mounts on 35 mm or 75 mm rail.

MPN
3RT1046-3AC20