Skip to main content
Siemens 3RT1024-3AL20-1AA0 — Contactors

Siemens 3RT1024-3AL20-1AA0 SIRIUS Power Contactor, Size S0,

MPN3RT1024-3AL20-1AA0

Siemens SIRIUS, power contactor, Size S0, 3RT1024-3AL20-1AA0, 24 VDC coil, screw-type terminals, snap-on 35 mm DIN rail mount.

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

3RT1024-3AL20-1AA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1024-3AL20-1AA0 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V12.5 A
Rated value @ 400 V3 A
Rated value @ 500 V7.5 kW
Rated value @ 690 V7.5 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1024-3AL20-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RT1024-3AL20-1AA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1024-3AL20-1AA0 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 63 A
Short-circuit coordination type 2, fusefuse gL/gG: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1024-3AL20-1AA0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Side-by-side mountingYes
3RT1024-3AL20-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1024-3AL20-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1024-3AL20-1AA0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth91 mm

Product details

The 24 VDC coil pulls in reliably; the screw-type main terminals accept 2x (1 to 2.5 mm²) solid/stranded or up to 2x 10 mm², so it wires cleanly into existing panel layouts without crimping ferrules for the power circuit.

Motor duty and coordination

Rated for AC-2 duty at 400 V at 5.5 kW and AC-4 at 400 V at 12.5 A — the AC-4 figure governs reversing or inching applications where the contactor makes and breaks stalled-rotor current. For Type 2 coordination (no weld under fault) the upstream fuse must be gL/gG 25 A; Type 1 allows 63 A. That fuse spec matters when sizing the branch circuit in a motor control center.

IP20 on the front, IP00 at the terminals — so it belongs inside an enclosure, not exposed.

The built-in auxiliary contacts handle 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — enough to drive a PLC input or a small pilot light directly. At 24 VDC inductive loads the rating drops to 2 A; at 220 VDC it is 0.3 A. For DC switching, derate accordingly or use a DC-rated interposing relay for higher currents.

Frequently asked questions

What is the depth of 3RT1024-3AL20-1AA0?

The depth is 91 mm, with a width of 45 mm and height of 85 mm, fitting the standard S0 contactor footprint.

What wire sizes does the 3RT1024-3AL20-1AA0 accept?

Solid wire 2x (0.25 to 2.5 mm²) for control circuits; main terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm² stranded.

MPN
3RT1024-3AL20-1AA0