Skip to main content
Log in
Siemens 3RT1526-1BF40 — Contactors

Siemens 3RT1526-1BF40 SIRIUS Power Contactor, S0 Frame, 35A

MPN3RT1526-1BF40

Siemens SIRIUS power contactor, 3RT1526-1BF40, S0 frame, 35 A rated at 24 V DC, screw-type terminals, 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

3RT1526-1BF40 — Identification
ParameterValue
Contactor frame sizeS0
3RT1526-1BF40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
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
3RT1526-1BF40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1526-1BF40 — Contacts & Poles
ParameterValue
Main poles4
Main NO contacts2
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1526-1BF40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 63 A
Short-circuit coordination type 2, fusefuse gL/gG: 35 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1526-1BF40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, solid or stranded2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1526-1BF40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1526-1BF40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1526-1BF40 — Mechanical
ParameterValue
Width61 mm
Height85 mm
Depth101 mm

Product details

It carries a 35 A rated operational current per NO and NC main contact at 24 V DC, per the datasheet.

The S0 footprint measures 61 mm wide by 85 mm tall by 101 mm deep, which is the standard slot for this frame class.

The 35 A rating at 24 V DC on the main contacts means this contactor can switch DC loads up to that current — important for battery-backed or DC-bus applications. For AC auxiliary circuits, the contact ratings step down with voltage: 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. The minimum DC switching capability is 16 mA at 24 V, which covers low-power PLC inputs and pilot lights.

Protection and environmental limits

Short-circuit protection requires a gL/gG fuse rated at 35 A for type 2 coordination. Arcing time is specified at 10 to 15 ms, and DC operating time between 13 and 40 ms.

Frequently asked questions

What are the key dimensions for panel layout?

The S0 frame measures 61 mm wide, 85 mm tall, and 101 mm deep. Side-by-side mounting is permitted without additional spacing.

What wire sizes does the screw terminal accept?

Solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). For AWG: 2x (20 to 16), 2x (18 to 14), 1x 12.

What short-circuit protection is required?

For type 2 coordination, use a gL/gG fuse rated at 35 A.

What compliance documentation is available?

RoHS compliance is confirmed with a substance prohibition date of 01 July 2006. The contactor is designed to meet IEC 60947-1 impulse withstand at 6 kV.

MPN
3RT1526-1BF40