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Siemens 3RT1066-6XB46-0LA2 SIRIUS Power Contactor, S10

MPN3RT1066-6XB46-0LA2

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Siemens SIRIUS 3RT1066-6XB46-0LA2 power contactor, size S10, 24 VDC coil, screw fixing, 202 x 145 x 210 mm, integrated auxiliary switch.

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Siemens 3RT1066-6XB46-0LA2 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT1066-6XB46-0LA2 — Identification
Parameter	Value
Contactor frame size	S10

3RT1066-6XB46-0LA2 — Ratings & Performance
Parameter	Value
Rated operational current, AC-12, max.	10 A
Rated operational current, AC-4 @ 400 V	280 A
Rated value @ 400 V	3 A
Rated value @ 500 V	2 A
Rated value @ 690 V	112 kW
Rated value @ 230 V	6 A
Rated value @ 24 V	6 A
Rated value @ 60 V	2 A
Rated value @ 110 V	1 A
Rated value @ 220 V	0.3 A

3RT1066-6XB46-0LA2 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RT1066-6XB46-0LA2 — Contacts & Poles
Parameter	Value
Main poles	3
Main NO contacts	3

3RT1066-6XB46-0LA2 — Protection & Coordination
Parameter	Value
Short-circuit coordination type 1, fuse	gG: 500 A (690 V, 100 kA)
Short-circuit coordination type 2, fuse	gG: 400 A (690 V, 100 kA), aM: 315 A (690 V, 50 kA), BS88: 400 A (415 V, 50 kA)
Aux. switch short-circuit protection, fuse	gG: 10 A (500 V, 1 kA)

3RT1066-6XB46-0LA2 — Connection & Mounting
Parameter	Value
Main circuit connection	screw-type terminals
Aux. / control circuit connection	screw-type terminals
Conductor cross-section, solid	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, solid or stranded	2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting method	screw fixing
Side-by-side mounting	Yes

3RT1066-6XB46-0LA2 — Durability
Parameter	Value
Durability (operating cycles, typ.)	10 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RT1066-6XB46-0LA2 — Environmental
Parameter	Value
Operating temperature range	-40 ... +70 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RT1066-6XB46-0LA2 — Mechanical
Parameter	Value
Width	145 mm
Height	210 mm
Depth	202 mm

Product details

Switching frequency and duty-cycle limits

The 3RT1066-6XB46-0LA2: Maximum switching rates are duty-dependent: 700 operations/hour in AC-1 (resistive), 500/h in AC-3 (motor start/run), 250/h in AC-2 (slip-ring motor), and 130/h in AC-4 (plugging/inching). For DC loads, the ceiling is 350/h in DC-1 and 250/h in DC-3 or DC-5.

The order code 3RT1066-6XB46-0LA2 is the exact Siemens MPN; no direct cross-reference or second-source replacement is documented. Confirm the coil voltage and auxiliary contact configuration match the panel schematic before committing the BOM line.

Frequently asked questions

Does 3RT1066-6XB46-0LA2 include an auxiliary contact?

Yes, an auxiliary switch is integrated into the contactor, eliminating the need for a separate add-on block for basic status feedback or interlocking.