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Siemens 3RT2027-2BB40-ZW96 — Contactors

Siemens 3RT2027-2BB40-ZW96 SIRIUS Power Contactor, 24 VDC Co

MPN3RT2027-2BB40-ZW96
Active

Siemens SIRIUS, power contactor, 3RT2027-2BB40-ZW96, Size S0, 24 VDC coil, spring-type terminals, 18-8 A main contacts, screw and snap-on 35 mm DIN rail.

Siemens 3RT2027-2BB40-ZW96 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

3RT2027-2BB40-ZW96 — Identification
ParameterValue
Contactor frame sizeS0
3RT2027-2BB40-ZW96 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V22 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V5 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2027-2BB40-ZW96 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2027-2BB40-ZW96 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2027-2BB40-ZW96 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA)
Short-circuit coordination type 2, fusegG: 50A (690V,100kA), aM: 25A (690V, 100kA), BS88: 50A (415V, 80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2027-2BB40-ZW96 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid1 ... 10 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2027-2BB40-ZW96 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2027-2BB40-ZW96 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2027-2BB40-ZW96 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth107 mm

Product details

SIRIUS S0 Power Contactor with 24 VDC Coil

Duty-Cycle Capacity and Switching Frequency

Switching frequency depends on the load category: 1 000 operations per hour for AC-1 resistive loads, 750 per hour for AC-2 and AC-3 motor starting, and 250 per hour for AC-4 plugging or inching duty. The AC-3e rating also allows 750 operations per hour. These limits reflect thermal recovery of the contactor — exceeding them shortens electrical life or risks contact welding.

Mounting and Environmental Tolerances

Coil and main terminals use spring-type (spring-cage) connections. The main circuit accepts solid or stranded wire from 1 to 10 mm²; the auxiliary circuit can take 2× (0.5 to 2.5 mm²). Spring-cage terminations reduce wiring time and resist loosening from vibration — a practical advantage in panel builds or on mobile equipment.

Frequently asked questions

Where can I buy 3RT2027-2BB40-ZW96 and how do I get a price?

This part is sourced through independent distribution channels. Submit an RFQ against this listing; availability and current pricing are confirmed at quote time.

What is 3RT2027-2BB40-ZW96's listed depth?

The depth is 107 mm, measured from the DIN rail mounting surface to the front of the housing.

What solid wire range does 3RT2027-2BB40-ZW96 accept?

The main circuit terminals accept solid conductors from 1 to 10 mm².

Will 3RT2027-2BB40-ZW96 drop into a panel specified around 3RT2015-1BW42 without rewiring?

Both are S0 frame size with the same 45 mm width and DIN-rail mounting, so the physical footprint matches. However, the coil voltage and main contact ratings differ — verify that the 24 VDC coil and 18-8 A rating meet the circuit requirements before assuming a direct swap.

MPN
3RT2027-2BB40-ZW96