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Siemens 3RT2027-1AC20-ZX95 — Contactors

Siemens 3RT2027-1AC20-ZX95 SIRIUS Power Contactor, Size S0,

MPN3RT2027-1AC20-ZX95
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Siemens SIRIUS power contactor, Size S0, 45 mm width, 97 mm depth, screw-type coil terminals, screw and snap-on mounting on 35 mm DIN rail (DIN EN 60715).

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

Specifications

3RT2027-1AC20-ZX95 — Identification
ParameterValue
Contactor frame sizeS0
3RT2027-1AC20-ZX95 — 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
3RT2027-1AC20-ZX95 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz24 V
3RT2027-1AC20-ZX95 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2027-1AC20-ZX95 — 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)
3RT2027-1AC20-ZX95 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid1 ... 10 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2027-1AC20-ZX95 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2027-1AC20-ZX95 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2027-1AC20-ZX95 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth97 mm
3RT2027-1AC20-ZX95 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

Depth is 97 mm, so it clears standard 100 mm enclosure depths without issue. Mounting is screw or snap-on onto 35 mm DIN rail per DIN EN 60715, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt — useful when panel layout forces an unconventional orientation.

Wire range accepts solid or stranded conductors from 1 to 10 mm², and for the auxiliary contacts the spec allows two conductors per terminal (2x 0.5–1.5 mm² or 2x 0.75–2.5 mm²). That covers most motor-circuit wiring up to 4 mm² without needing a ferrule change. The contactor is rated for switching frequencies: up to 1000 cycles per hour in AC-1 resistive duty, 750 cycles/hour in AC-3 motor-starting duty, and 250 cycles/hour in AC-4 reversing/plugging duty. For a conveyor or pump start-stop, the AC-3 rate is the one that governs — 750 cycles/hour is enough for a fast-cycling line but not a servo-like application.

That 6 mm side gap is tighter than some older contactor families — if you're retrofitting into a panel that had a wider frame, verify the side spacing before committing.

Frequently asked questions

Where can I buy the 3RT2027-1AC20-ZX95 and what is the lead time?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote.

Will 3RT2027-1AC20-ZX95 drop into a panel specified around 3RT2026-1BB40-0UA0 without rewiring?

Both are Size S0 contactors with the same 45 mm width and 35 mm DIN-rail mounting, so the mechanical fit is identical. However, the coil voltage and auxiliary contact configuration may differ — verify the coil rating on the nameplate before swapping.

What is the depth of the 3RT2027-1AC20-ZX95?

The depth is 97 mm, which clears standard 100 mm enclosure depths without issue.

What conductor sizes does the 3RT2027-1AC20-ZX95 accept?

Solid or stranded conductors from 1 to 10 mm² are accepted on the main terminals; auxiliary terminals accept 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²).

MPN
3RT2027-1AC20-ZX95