BOM / RFQ

Siemens 3RT20 Series

2508 variants · Siemens

About the Siemens 3RT20 Series

The Siemens 3RT20 Series series groups 2508 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. Variants differ by arcing time, depth and height, so you can match the exact arcing time your application requires using the selection guide below.

Select a variant by

Arcing time: 10 ... 10 ms · 10 ... 15 ms · 10 ... 20 ms
Depth: 73 mm · 97 mm · 107 mm · 130 mm · 151 mm · 152 mm · 154 mm
Height: 70 mm · 85 mm · 102 mm · 114 mm · 140 mm
Width: 45 mm · 55 mm · 70 mm

Variant comparison

Parameter	3RT2024-1FB44-3MA0	3RT2026-1BM40	3RT2026-1FB44-3MA0	3RT2026-2BB44	3RT2028-1AC20	3RT2035-1KB40
Arcing time	10 ... 10 ms	10 ... 10 ms	10 ... 10 ms	10 ... 10 ms	10 ... 10 ms	10 ... 20 ms
Depth	151 mm	107 mm	151 mm	154 mm	97 mm	130 mm
Height	85 mm	85 mm	85 mm	102 mm	85 mm	114 mm
Width	45 mm	45 mm	45 mm	45 mm	45 mm	55 mm

Request a quote on any Siemens 3RT20 Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.

All variants

Siemens 3RT2024-1FB44-3MA0

3RT2024-1FB44-3MA0

Siemens SIRIUS power contactor 3RT2024-1FB44-3MA0, 24 V DC coil, size S0, screw-type terminals, for 35 mm DIN rail.

Depth: 151 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2026-1BM40

Siemens SIRIUS 3RT2026-1BM40 power contactor, size S0, screw-type coil terminals, integrated auxiliary switch, 220 V rated coil.

Depth: 107 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2026-1FB44-3MA0

3RT2026-1FB44-3MA0

Siemens SIRIUS power contactor, 3RT2026-1FB44-3MA0, Size S0, 45 mm width, screw-type terminals, 35 mm DIN rail snap-on mounting, 151 mm depth, 85 mm height.

Depth: 151 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2026-2BB44

Siemens SIRIUS 3RT2026-2BB44 power contactor, S0 size, 24 V DC coil, spring-type terminals.

Depth: 154 mm · Width: 45 mm · Height: 102 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2028-1AC20

Siemens SIRIUS 3RT2028-1AC20 power contactor, S0 frame, 45 mm, screw-type coil terminals, DIN rail mounting.

Depth: 97 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2035-1KB40

Siemens SIRIUS 3RT2035-1KB40 coupling contactor, 24 VDC coil, S2 frame size, screw-type terminals, 55 mm width, 130 mm depth, DIN-rail mount.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2036-1AK60

Siemens SIRIUS power contactor, 3RT2036-1AK60, 52 A at 480 V, 55 mm width, 130 mm depth, size S2.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2037-1KB40

Siemens SIRIUS S2 coupling contactor, 24 V DC coil, screw-type terminals, 55 mm width, 130 mm depth, 114 mm height.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2038-1AP00

Siemens SIRIUS S2 power contactor, 3RT2038-1AP00, rated 65 A at 480 V, screw and snap-on 35 mm DIN rail, current lifecycle stage.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2045-1KB40

Siemens SIRIUS S3 coupling contactor, 3RT2045-1KB40, 24 V DC coil, screw-type terminals, DIN rail mounting, 10 million mechanical cycles.

Depth: 152 mm · Width: 70 mm · Height: 140 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2047-1AK60

Siemens SIRIUS 3RT2047-1AK60 power contactor, size S3, AC-3 850 1/h, 152 mm deep, screw and snap-on DIN rail mounting.

Depth: 152 mm · Width: 70 mm · Height: 140 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2018-2BB41

Siemens SIRIUS 3RT2018-2BB41 power contactor, size S00, 24 V DC coil, spring-type terminals, 45 mm width, 73 mm depth, 70 mm height.

Depth: 73 mm · Width: 45 mm · Height: 70 mm · Arcing time: 10 ... 15 ms

Siemens 3RT2028-1FB44-3MA0

3RT2028-1FB44-3MA0

Siemens SIRIUS 3RT2028-1FB44-3MA0 power contactor, 24 VDC coil, screw terminals, S0 size.

Depth: 151 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2037-1AC20

Siemens SIRIUS S2 power contactor, 3RT2037-1AC20, rated 65 A at 480 V AC-3, 24 V 50 Hz coil, screw terminals, DIN-rail mount.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2037-1KB44-3MA0

3RT2037-1KB44-3MA0

Siemens SIRIUS coupling contactor, 3RT2037-1KB44-3MA0, size S2, 24 V DC coil, screw-type terminals, DIN rail mount, 174 mm depth.

Depth: 174 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2045-1AK60

Siemens SIRIUS 3RT2045-1AK60, power contactor, size S3, screw-type terminals, solid wire 2.5...16 mm², depth 152 mm, active production.

Depth: 152 mm · Width: 70 mm · Height: 140 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2046-1AP60

Siemens SIRIUS, power contactor, 3RT2046-1AP60, size S3, screw-type coil terminals, auxiliary switch, 152 mm depth, 70 mm width, 140 mm height.

Depth: 152 mm · Width: 70 mm · Height: 140 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2046-1KB40

Siemens SIRIUS coupling contactor 3RT2046-1KB40, S3 frame, 24 VDC coil, screw-type terminals, 70 x 140 x 152 mm DIN-rail mount.

Depth: 152 mm · Width: 70 mm · Height: 140 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2023-1FB40

Siemens SIRIUS power contactor, size S0, 24 V DC coil, screw-type terminals, 45 x 85 x 107 mm.

Depth: 107 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2024-1NB30

Siemens SIRIUS, power contactor, 3RT2024-1NB30, S0 frame, coil 21-28 V, screw terminals, 1-10 mm² wire, active.

Depth: 107 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2027-1AK60

Siemens SIRIUS power contactor, 3RT2027-1AK60, S0 frame size, 45 mm width, screw-type terminals, 97 mm depth.

Depth: 97 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2035-1AK64

Siemens SIRIUS 3RT2035-1AK64, size S2 power contactor, screw-type coil terminals, 110 V AC 50 Hz, current-production lifecycle.

Depth: 174 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2035-1KB44-3MA0

3RT2035-1KB44-3MA0

Siemens SIRIUS coupling contactor, 3RT2035-1KB44-3MA0, S2 size, 24 V DC coil, screw terminals, 55 mm width, 174 mm depth, 114 mm height, AC-3 switching rated to 1000 ops/h, active lifecycle.

Depth: 174 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2038-1AM20

Siemens SIRIUS power contactor 3RT2038-1AM20, S2 frame, screw-type coil terminals, with auxiliary switch, DIN rail mount.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2046-1AK64-3MA0

3RT2046-1AK64-3MA0

Siemens SIRIUS power contactor, S3 frame, 3RT2046-1AK64-3MA0, 195 mm depth, 70 mm width, screw-type coil terminals.

Depth: 195 mm · Width: 70 mm · Height: 140 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2046-1AM20

Siemens SIRIUS 3RT2046-1AM20 power contactor, size S3, screw terminals, AC-3 max 850 switching cycles/h, 152 mm depth.

Depth: 152 mm · Width: 70 mm · Height: 140 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2046-1KB44-3MA0

3RT2046-1KB44-3MA0

Siemens SIRIUS series, coupling contactor, 3RT2046-1KB44-3MA0, S3 frame, 24 V DC coil, 85 A AC-3.

Depth: 195 mm · Width: 70 mm · Height: 140 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2027-1AP60

Siemens SIRIUS Power Contactor, 3RT2027-1AP60, Size S0, 45 mm width, screw terminals, 10 A at 24 V, active production.

Depth: 97 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2028-1AN20

Siemens SIRIUS power contactor 3RT2028-1AN20, Size S0, 45 mm wide, screw-type coil terminals, auxiliary switch, up to 1,000 ops/h at AC-1.

Depth: 97 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2036-1AK64-3MA0

3RT2036-1AK64-3MA0

Siemens SIRIUS power contactor, size S2, order code 3RT2036-1AK64-3MA0, 52 A at 480 V, screw-type coil terminals, 55 mm wide.

Depth: 174 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2037-3AL20

Siemens SIRIUS power contactor, 3RT2037-3AL20, S2 frame, 65 A at 480 V AC-3, spring-type coil terminals, screw and snap-on DIN rail mount.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2038-1AK60

Siemens SIRIUS power contactor, size S2, order code 3RT2038-1AK60, rated 65 A at 480 V, 10,000,000 mechanical operations.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2038-1KB40

Siemens SIRIUS 3RT2038-1KB40 coupling contactor, 24 V DC coil, S2 size, 55 mm width, 130 mm depth.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2038-3AG20

Siemens SIRIUS power contactor, Size S2, 3RT2038-3AG20, 65 A at 480 V AC-3, 110 V 50 Hz coil, spring-type terminals, screw and snap-on 35 mm DIN rail mount.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2015-1BB42

Siemens SIRIUS 3RT2015-1BB42 power contactor, S00 frame, 24 V DC coil, screw-type terminals, 45 mm width, DIN rail snap-on mounting.

Depth: 73 mm · Width: 45 mm · Height: 58 mm · Arcing time: 10 ... 15 ms

Siemens 3RT2026-1BB44-3MA0

3RT2026-1BB44-3MA0

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.

Depth: 151 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2026-1KB40

Siemens SIRIUS 3RT2026-1KB40 coupling contactor, S0 frame, 24 V DC coil, 10 A DC-13 at 24 V, screw terminals, 45 mm width, DIN rail.

Depth: 107 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2027-1AK60-0UA0

3RT2027-1AK60-0UA0

Siemens SIRIUS 3RT2027-1AK60-0UA0 S0 power contactor, 5 hp at 230 V, screw-type coil terminals, 3-pole, 45 mm wide, DIN rail snap-on.

Depth: 97 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2035-1NB30

Siemens SIRIUS 3RT2035-1NB30 power contactor, size S2, 20-33 V coil, 55 mm wide, 130 mm deep, screw and snap-on DIN rail mount.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2036-1AM20

Siemens SIRIUS S2 power contactor, 3RT2036-1AM20, 208 V 50 Hz coil, screw-type terminals, depth 130 mm, width 55 mm.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2038-1NB30

Siemens SIRIUS S2 power contactor, 3RT2038-1NB30, size S2, screw-type coil terminals, 55 mm width, 130 mm depth, 114 mm height.

Depth: 130 mm · Width: 55 mm · Height: 114 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2045-1AP60

Siemens SIRIUS 3RT2045-1AP60 S3 power contactor, screw-type coil terminals, auxiliary switch, 152 mm depth.

Depth: 152 mm · Width: 70 mm · Height: 140 mm · Arcing time: 10 ... 20 ms

Siemens 3RT2026-1AV60

Siemens SIRIUS power contactor 3RT2026-1AV60, size S0, 45 mm width, screw and snap-on mounting on 35 mm DIN rail. Auxiliary contacts rated 10 A at 24 V, mechanical life 10,000,000 operations.

Depth: 97 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2024-1FB40

Siemens SIRIUS, power contactor, 3RT2024-1FB40, S0 frame, 24 V coil, screw-type terminals, 1-10 mm² solid/stranded wire, auxiliary switch.

Depth: 107 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2018-1AK61-0UA0

3RT2018-1AK61-0UA0

Siemens SIRIUS power contactor, 3RT2018-1AK61-0UA0, size S00, 45 mm width, 73 mm depth, auxiliary switch, screw terminals.

Depth: 73 mm · Width: 45 mm · Height: 58 mm · Arcing time: 10 ... 15 ms

Siemens 3RT2024-1BB44-3MA0

3RT2024-1BB44-3MA0

Siemens SIRIUS power contactor, size S0, 24 V coil, screw-type terminals, active production.

Depth: 151 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2028-1BB40

Siemens SIRIUS power contactor, 3RT2028-1BB40, size S0, 24 V DC coil, screw terminals, 45 mm width.

Depth: 107 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2023-2BB40

Siemens SIRIUS 3RT2023-2BB40, Size S0 power contactor, 24 V DC coil, 10 A at DC-13, spring-type terminals, DIN rail mount.

Depth: 107 mm · Width: 45 mm · Height: 102 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2026-1AK60

Siemens SIRIUS power contactor 3RT2026-1AK60, S0 frame, 45 mm wide, 97 mm deep, screw-type coil terminals.

Depth: 97 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms

Siemens 3RT2026-1AP60

Siemens SIRIUS 3RT2026-1AP60 power contactor, AC-3e/AC-3, 25 A, 11 kW / 400 V, 3-pole, 220 V AC coil 50 Hz / 240 V 60 Hz, 1 NO + 1 NC auxiliary, screw terminals, size S0, DIN rail mount.

Depth: 97 mm · Width: 45 mm · Height: 85 mm · Arcing time: 10 ... 10 ms