The S0 frame size defines the contactor's thermal and mechanical endurance. Switching frequency limits vary by duty: AC-1 (resistive) allows up to 1,000 cycles/hour; AC-3 (motor starting) and AC-3e (enhanced motor) allow 750 cycles/hour; AC-4 (plugging/inching) is limited to 250 cycles/hour. This governs how aggressively you can cycle the load without overheating the contactor. Auxiliary contact ratings are provided at multiple DC voltages: 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 0.6 A at 440 V. Use the voltage-specific value for sizing control circuits.
Siemens 3RT2026-1AC20-ZX95 SIRIUS Power Contactor, S0 Size
MPN3RT2026-1AC20-ZX95
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Siemens SIRIUS power contactor, 3RT2026-1AC20-ZX95, size S0, screw-type terminals, 45 mm width, 97 mm depth, 85 mm height.
Source DocumentedChannel stated on listing & quote
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Contactor frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated operational current, AC-4 @ 400 V | 15.5 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 2 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 3 hp |
| Rated value @ 24 V | 10 A |
| Rated value @ 60 V | 2 A |
| Rated value @ 110 V | 1 A |
| Rated value @ 220 V | 0.3 A |
| Parameter | Value |
|---|---|
| Control supply voltage type | AC |
| Rated value @ 50 Hz | 0.25 |
| Rated value @ 50 Hz | 24 V |
| Parameter | Value |
|---|---|
| Main poles | 3 |
| Main NO contacts | 3 |
| Auxiliary contact reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Parameter | Value |
|---|---|
| Short-circuit coordination type 1, fuse | gG: 100 A (690 V, 100 kA), aM: 50 A (690 V, 100 kA), BS88: 100 A (415 V, 80 kA) |
| Short-circuit coordination type 2, fuse | gG: 35A (690V, 100kA), aM: 20A (690V, 100kA), BS88: 35A (415V, 80kA) |
| Aux. switch short-circuit protection, fuse | gG: 10 A (500 V, 1 kA) |
| Parameter | Value |
|---|---|
| Main circuit connection | screw-type terminals |
| Aux. / control circuit connection | screw-type terminals |
| Conductor cross-section, solid | 1 ... 10 mm² |
| Conductor cross-section, solid or stranded | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Conductor cross-section, finely stranded w/ ferrule | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Mounting method | screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715 |
| Side-by-side mounting | Yes |
| Parameter | Value |
|---|---|
| Durability (operating cycles, typ.) | 10 000 000 |
| Durability with aux. switch block (cycles, typ.) | 10 000 000 |
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60 °C |
| Storage temperature range | -55 ... +80 °C |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 85 mm |
| Depth | 97 mm |
| Parameter | Value |
|---|---|
| At AC | 4 ... 16 ms |
Product details
Frequently asked questions
What are the main dimensions of this contactor?
Width is 45 mm, depth is 97 mm, and height is 85 mm. The S0 frame size fits standard panel layouts.
What wire sizes does the main circuit accept?
Solid or stranded conductors from 1 to 10 mm², and for auxiliary circuits, 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²).
Does this contactor include an auxiliary switch?
Yes, it comes with an auxiliary switch integrated.
What mounting options are available?
Screw or snap-on mounting onto 35 mm DIN rail per DIN EN 60715. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward.
MPN
3RT2026-1AC20-ZX95