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Siemens 3RT1055-6XB46-0LA2 — Contactors

Siemens 3RT1055-6XB46-0LA2 SIRIUS Power Contactor, 24 V DC,

MPN3RT1055-6XB46-0LA2
Active

Siemens SIRIUS power contactor, 3RT1055-6XB46-0LA2, size S6, 24 V DC coil, screw fixing, 170 mm depth, 120 mm width, 172 mm height.

Siemens 3RT1055-6XB46-0LA2 datasheet (PDF)
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

3RT1055-6XB46-0LA2 — Identification
ParameterValue
Contactor frame sizeS6
3RT1055-6XB46-0LA2 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V132 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V55 kW
Rated value @ 230 V30 hp
Rated value @ 24 V6 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1055-6XB46-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1055-6XB46-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT1055-6XB46-0LA2 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 355 A (690 V, 100 kA)
Short-circuit coordination type 2, fusegG: 315 A (690 V, 100 kA), aM: 200 A (690 V, 50 kA), BS88: 315 A (415 V, 50 kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT1055-6XB46-0LA2 — 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 (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew fixing
Side-by-side mountingYes
3RT1055-6XB46-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1055-6XB46-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1055-6XB46-0LA2 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm

Product details

It carries a 24 V DC coil, screw-fixing mounting, and an integrated auxiliary switch block.

The 24 V DC coil picks up at 70% of rated voltage (about 16.8 V) and drops out at 125% (30 V), so it holds in during a sag but releases cleanly on overvoltage. The auxiliary contacts handle 6 A at 24 V DC, derating to 0.9 A at 125 V DC — enough for PLC inputs or relay coils on the same control voltage.

Switching frequency by duty class

Maximum switching rates are duty-dependent: 800 ops/h in AC-1 (resistive), 750 ops/h in AC-3 and AC-3e (standard motor starting), 300 ops/h in AC-2 (slip-ring motors), and 130 ops/h in AC-4 (plugging/inching). For DC loads: 400 ops/h in DC-1, 350 ops/h in DC-3 and DC-5.

Mounts via screw fixing with a single 9 mm hole. The enclosure needs 10 mm clearance upwards, downwards, and to the sides, plus 20 mm forwards for arc venting. Dimensions are 172 mm high, 120 mm wide, 170 mm deep — size S6 frame. Wire terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²).

Frequently asked questions

Where can I buy 3RT1055-6XB46-0LA2 and get current pricing?

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

What are the key dimensions of 3RT1055-6XB46-0LA2?

The contactor measures 172 mm high, 120 mm wide, and 170 mm deep — size S6 frame. Clearance requirements are 10 mm up/down/sides and 20 mm forward for arc venting.

What wire sizes does the 3RT1055-6XB46-0LA2 accept?

Terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²).

How does this compare to the 3RT1055-1AB36?

The 3RT1055-1AB36 is a different coil voltage variant within the same SIRIUS S6 frame. The 3RT1055-6XB46-0LA2 carries a 24 V DC coil, while the -1AB36 uses a different coil voltage. Both share the same mechanical dimensions, mounting pattern, and auxiliary contact options — so one can replace the other in the same panel without rewiring the main power circuit, provided the coil supply is changed to match.

MPN
3RT1055-6XB46-0LA2