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Siemens 3RT1055-2XB46-0LA2 — Contactors

Siemens 3RT1055-2XB46-0LA2 SIRIUS Contactor, Size S6, 24 V D

MPN3RT1055-2XB46-0LA2
Active

Siemens SIRIUS contactor, Size S6, 24 V DC coil, 6 A at 24 V rated value, screw fixing, 170 × 120 × 172 mm (D × W × H).

Siemens 3RT1055-2XB46-0LA2 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT1055-2XB46-0LA2 — Identification
ParameterValue
Contactor frame sizeS6
3RT1055-2XB46-0LA2 — 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
3RT1055-2XB46-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1055-2XB46-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT1055-2XB46-0LA2 — 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)
3RT1055-2XB46-0LA2 — 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 (0,25 ... 2,5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew fixing
Side-by-side mountingYes
3RT1055-2XB46-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1055-2XB46-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1055-2XB46-0LA2 — Mechanical
ParameterValue
Width120 mm
Height172 mm
Depth170 mm

Product details

The 3RT1055-2XB46-0LA2: Fastening is by screw fixing, not DIN-rail snap-on, so plan for panel drilling and threaded inserts. The single 9 mm hole per the Number Of Holes entry is for the fixing bolt.

Switching performance and thermal limits

At 24 V DC rated value, the contactor switches 6 A; at 48 V the rating drops to 2 A, and at 125 V to 0.9 A — a steep DC derating curve that reflects arc-quenching limits. For AC loads, the maximum switching frequency varies by duty: 800 cycles/hour at AC-1 (resistive), 750 at AC-3 (motor start/run), and 130 at AC-4 (plugging/inching). Operating temperature range is -40 to +70 °C; storage range is -55 to +80 °C, so the part handles cold storage but derate the switching frequency above 40 °C per the thermal curve.

Frequently asked questions

What is the closest functional second-source to 3RT1055-2XB46-0LA2?

The 3RT1055-1AB36 is a peer in the same Size S6 frame, but it uses a different coil voltage and lacks the auxiliary switch. Verify coil voltage and auxiliary contact requirements before substituting.

Will 3RT1055-2XB46-0LA2 drop into a panel specified around 3RT1055-1AB36 without rewiring?

Both are Size S6 contactors with screw fixing, so the mounting footprint and hole pattern are identical. However, the coil voltage differs — 24 V DC on this part versus the peer — so the control wiring must match the coil rating.

What compliance documentation does this brand provide for 3RT1055-2XB46-0LA2?

Siemens SIRIUS contactors typically carry UL, CSA, CE, and IEC certifications, and RoHS/REACH declarations are available from the manufacturer. Specific documentation should be requested at quote time.

How do I get current pricing and availability for 3RT1055-2XB46-0LA2?

Submit an RFQ through this listing. Pricing and lead time are confirmed at quote time through our independent distribution network.

MPN
3RT1055-2XB46-0LA2