Siemens 3RT2026-1BB44-3MA0 SIRIUS contactor 24V DC coil S0 4
Siemens SIRIUS 3RT2026-1BB44-3MA0, power contactor, size S0, 24 V DC coil, screw-type terminals, no auxiliary switch, 45 mm width, 151 mm depth, active production.
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 | 6 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 | DC |
| 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 | 151 mm |
Product details
Frequently asked questions
What are the key dimensions of this contactor?
Width 45 mm, height 85 mm, depth 151 mm — standard S0 frame size. It mounts on a 35 mm DIN rail with screw or snap-on.
What is the maximum solid conductor size for the main terminals?
The main terminals accept solid or stranded conductors from 1 to 10 mm². For auxiliary contacts, two conductors from 0.5 to 1.5 mm² (or 0.75 to 2.5 mm²) are permitted.
No add-on auxiliary switch block, so what you see is what you get: three main poles and one normally-open auxiliary contact built in. That's a compact footprint for a contactor rated to switch motor loads in the 7.5 kW range (depends on the duty). If you're cramming a panel, the 45 mm width leaves room for a soft starter or a breaker alongside.
Storage range goes down to -55 °C, but that's handling, not running. That's handy when you're fitting it into a mixed row of gear.