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Siemens 3RT1025-3BD40-1AA0 — Contactors

Siemens 3RT1025-3BD40-1AA0 SIRIUS Power Contactor, Size S0,

MPN3RT1025-3BD40-1AA0

Siemens SIRIUS power contactor, Size S0, 3RT1025-3BD40-1AA0, 45 mm width, screw-type terminals, 24 VDC coil, rated 11 kW at 690 V AC-3, IP20 front.

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

3RT1025-3BD40-1AA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-3BD40-1AA0 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V10 kW
Rated value @ 690 V11 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
3RT1025-3BD40-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1025-3BD40-1AA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-3BD40-1AA0 — 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
3RT1025-3BD40-1AA0 — 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
3RT1025-3BD40-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-3BD40-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1025-3BD40-1AA0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth101 mm

Product details

The coil holds at 24 VDC nominal; verify the DC supply can deliver the 5.4 W without droop under load. Rated for motor duty at 10 kW at 500 V and 11 kW at 690 V in AC-3 category, and 7.5 kW at 400 V in AC-2.

Mounting and integration — DIN rail, side-by-side, clearance

The IP20 front protection means the contactor is safe for finger contact from the front in a closed panel; the terminals themselves carry IP00, so live parts are exposed until the terminal shrouds are fitted. Screw-type terminals on the main circuit accept 2x (0.25 to 2.5 mm²) solid or 2x (1 to 2.5 mm²) stranded, with a maximum of 2x 10 mm². For AWG, that translates to 2x (16 to 12) solid or 2x (14 to 10) stranded, with a single 8 AWG maximum. Strip length and torque values follow the terminal marking on the contactor.

Coordination and protection — fuse sizing

These values assume the standard assignment per IEC 60947-4-1.

Operating conditions and lifecycle

Frequently asked questions

How do I get current pricing and availability for 3RT1025-3BD40-1AA0?

Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time.

What is the depth of 3RT1025-3BD40-1AA0?

The depth is 101 mm. Combined with the 45 mm width and 85 mm height, the contactor fits standard DIN-rail enclosures with 120 mm or deeper backpan.

What wire sizes does the 3RT1025-3BD40-1AA0 accept?

The screw terminals accept 2x (0.25 to 2.5 mm²) solid or 2x (1 to 2.5 mm²) stranded, with a maximum of 2x 10 mm². In AWG, that's 2x (16 to 12) solid or 2x (14 to 10) stranded, max 1x 8 AWG.

Will 3RT1025-3BD40-1AA0 drop into a panel specified for 3RT1023-1AL20?

The 3RT1025-3BD40-1AA0 is a Size S0 frame, while the 3RT1023-1AL20 is a smaller Size S00. The mounting hole pattern and DIN-rail footprint differ — the S0 is 45 mm wide versus 22.5 mm for S00. It will not fit without panel modification.

What compliance documentation does Siemens provide for 3RT1025-3BD40-1AA0?

As a standard SIRIUS catalog item, the contactor carries CE marking for the European market and is designed to IEC 60947-4-1. The manufacturer provides a declaration of conformity and the product is RoHS compliant per EU directive 2011/65/EU.

MPN
3RT1025-3BD40-1AA0