Siemens 3RT6025-1BB40 SIRIUS Power Contactor, 24 VDC Coil

Name: 3RT6025-1BB40
Brand: Siemens
SKU: 3RT6025-1BB40
Availability: LimitedAvailability
Author: Safety-Loop Lena

Specifications

Identification

3RT6025-1BB40 — Identification
Parameter	Value
Contactor frame size	S0

Ratings & Performance

3RT6025-1BB40 — Ratings & Performance
Parameter	Value
Rated operational current, AC-12, max.	10 A
Rated value @ 400 V	3 A
Rated value @ 690 V	1 A
Rated value @ 230 V	10 A
Rated value @ 24 V	6 A
Rated value @ 110 V	1 A
Rated value @ 220 V	0.3 A

Control & Coil

3RT6025-1BB40 — Control & Coil
Parameter	Value
Control supply voltage type	DC

Contacts & Poles

3RT6025-1BB40 — Contacts & Poles
Parameter	Value
Main poles	3
Main NO contacts	3
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

Protection & Coordination

3RT6025-1BB40 — Protection & Coordination
Parameter	Value
Short-circuit coordination type 1, fuse	gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 63 A
Short-circuit coordination type 2, fuse	gL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 25 A
Aux. switch short-circuit protection, fuse	fuse gL/gG: 10 A

Connection & Mounting

3RT6025-1BB40 — Connection & Mounting
Parameter	Value
Main circuit connection	screw-type terminals
Aux. / control circuit connection	screw-type terminals
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 50022
Side-by-side mounting	Yes

Durability

3RT6025-1BB40 — Durability
Parameter	Value
Durability (operating cycles, typ.)	10 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

Environmental

3RT6025-1BB40 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

Mechanical

3RT6025-1BB40 — Mechanical
Parameter	Value
Width	45 mm
Height	85 mm
Depth	107 mm

Product details

Rated for AC-3e duty up to 690 V, it delivers 23 kW at 400 V / 60 °C and 40 kW at 690 V / 60 °C — covering the majority of three-phase motor starting applications in the 15–40 kW band.

Coil and switching ratings

The 24 VDC coil is rated for 6 A at the rated value, with a maximum switching frequency of 1 500 cycles per hour under DC operation. For AC-3 and AC-3e motor loads the maximum is 1 000 cycles per hour, dropping to 300 per hour for AC-4 plugging or inching duty — sufficient for conveyor start/stop cycles but not for high-repetition indexing. Auxiliary switch blocks (screw-type terminals) can be added via the product extension slot, making this contactor configurable for interlocking or status feedback without a separate relay.

Frequently asked questions

What is the price of the Siemens 3RT6025-1BB40 contactor?

Pricing directly affects budget compliance and purchase decision.

Is the Siemens 3RT6025-1BB40 in stock and what is the lead time?

Availability determines project timeline and sourcing urgency.

What is the coil voltage of 3RT6025-1BB40?

Coil voltage must match control circuit voltage to avoid damage or failure.

What are the dimensions and mounting requirements of the 3RT6025-1BB40?

Physical fit and mounting compatibility are critical for panel layout and installation.

Can the 3RT6025-1BB40 be used for AC3 motor starting at 7.5 kW 400 V?

Application-specific rating confirms the contactor is suitable for the intended load.

What is the difference between 3RT6025-1BB40 and 3RT6025-1BB41?

Buyers often compare similar models to select the best option for their application.