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Siemens 5TT5040-2 — Contactors

Siemens SENTRON 5TT5040-2 4 NO Insta Contactor, 400 V 40 A A

MPN5TT5040-2
Active

Siemens SENTRON insta contactor, 5TT5040-2, 4 NO contacts, rated 400 V AC / 40 A, control AC/24 V DC, IP20, 3 MW units.

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

5TT5040-2 — Mechanical
ParameterValue
Width53.5 mm
Height90 mm
Depth71 mm

Product details

The control coil accepts both AC and DC, with a rated control voltage of 24 V DC, so it drops straight into a 24 VDC control bus without an extra rectifier.

Mounting and integration constraints

The 71 mm depth and 53.5 mm width mean it fits standard 4-module enclosure cutouts, but the manufacturer explicitly notes that spacers must be provided between contactors to ensure heat dissipation — so when ganging multiple units, leave a gap or use a ventilated backplate. IP20 finger-safe terminals are fine for enclosed panels; not for washdown zones.

Frequently asked questions

Will the 5TT5040-2 drop into a panel designed for a 3RT7026-1AB05 without rewiring?

Not without modification. The 5TT5040-2 is a 4-pole insta contactor with 4 NO contacts, while the 3RT7026-1AB05 is a 3-pole main contactor with 3 NO main contacts plus one NO + one NC auxiliary contact built in. The footprint differs (71 mm depth vs 91 mm, 53.5 mm vs 55 mm width), and the control voltage ranges are not identical — the 5TT5040-2 is rated for 24 V DC coil, whereas the 3RT7026-1AB05 expects a specific AC control voltage. Panel layout and wiring would need to be re-evaluated.

What are the key dimensions of the 5TT5040-2?

Depth is 71 mm, width 53.5 mm, height 90 mm, with an installation depth of 64 mm.

MPN
5TT5040-2