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Siemens 3RT2018-2BB41-0CC0 — Contactors

Siemens 3RT2018-2BB41-0CC0 SIRIUS Power Contactor, S00, 24 V

MPN3RT2018-2BB41-0CC0
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Siemens SIRIUS 3RT2018-2BB41-0CC0 power contactor, size S00, 24 VDC coil, spring-type terminals, 45 mm wide, 73 mm deep.

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

3RT2018-2BB41-0CC0 — Identification
ParameterValue
Contactor frame sizeS00
3RT2018-2BB41-0CC0 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V11.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V2 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2018-2BB41-0CC0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2018-2BB41-0CC0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2018-2BB41-0CC0 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 50A (690V,100kA), aM: 25A (690V,100kA), BS88: 50A (415V,80kA)
Short-circuit coordination type 2, fusegG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2018-2BB41-0CC0 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid0.5 ... 4 mm²
Conductor cross-section, solid or stranded2x (0,5 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2018-2BB41-0CC0 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2018-2BB41-0CC0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2018-2BB41-0CC0 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth73 mm

Product details

The coil is rated 24 VDC, and the main contacts are rated for switching at various DC voltage levels: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. This means the contactor can handle DC loads across a range of control voltages, but the current capability drops significantly as voltage rises — a key consideration for DC load switching where arc extinction is harder than AC. Switching frequency varies by duty class: up to 1,000 operations per hour at AC-1 (resistive loads), 750 ops/h at AC-2 and AC-3 (motor starting/running), and 250 ops/h at AC-4 (plugging/inching). The AC-3e rating also allows 750 ops/h. These limits govern how aggressively you can cycle the contactor in a given application — exceeding them shortens mechanical life.

That saves time on a panel build and avoids loose-terminal callbacks. This flexibility helps when fitting into tight or oddly oriented enclosures.

The storage range is wider — that covers shipping and warehouse conditions, not running duty. For a solar farm or desert installation, the 60 °C operating ceiling is adequate but leaves no headroom for internal cabinet heating above ambient; derate if the panel runs hot.

Frequently asked questions

What are the key dimensions for panel layout?

The contactor is 70 mm high, 45 mm wide, and 73 mm deep. It requires 10 mm clearance upwards and forwards, 10 mm downwards, and 6 mm at the sides.

What wire sizes does the spring terminal accept?

It accepts solid or stranded conductors from 0.5 to 4 mm², and can take dual conductors of the same range.

What is the DC switching capacity at various voltages?

The main contacts are rated 10 A at 24 VDC, 2 A at 48 V and 60 VDC, 1 A at 110 VDC, 0.9 A at 125 VDC, 0.3 A at 220 VDC, and 3 A at 400 VDC.

What is the switching frequency for motor duty?

At AC-3 (motor running) and AC-2 duty, the maximum is 750 operations per hour. At AC-4 (plugging/inching), it drops to 250 operations per hour.

MPN
3RT2018-2BB41-0CC0