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Schneider Electric LC3D12AU7 — Contactors

Schneider Electric LC3D12AU7 TeSys D Star Delta Starter, 12

MPNLC3D12AU7
Obsolete

Schneider Electric TeSys D series, LC3D12AU7 star delta starter, 3 x 3P (3 NO) poles, 12 A AC-3, 240 V AC coil, IP20 front face.

Schneider Electric LC3D12AU7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LC3D12AU7 — Identification
ParameterValue
Product / component typeStar delta starter
Series / rangeTeSys
ApplicationMotor control
LC3D12AU7 — Ratings & Performance
ParameterValue
Rated operational voltage (Ue)Power circuit: 10 MOhm for signalling circuit
Utilisation categoryAC-3
LC3D12AU7 — Contacts & Poles
ParameterValue
Pole configuration3 x 3P
LC3D12AU7 — Environmental
ParameterValue
IP degree of protectionIP20 front face conforming to IEC 60529
Operating altitude3000 m without derating
Mechanical robustnessVibrations contactor open: 2 Gn, 5...300 Hz Vibrations contactor closed: 4 Gn, 5...300 Hz Shocks contactor open: 10 Gn for 11 ms Shocks contactor closed: 15 Gn for 11 ms
Protective treatment / pollution degreeTH conforming to IEC 60068-2-30
Fire resistance850 °C conforming to IEC 60695-2-1
Flame retardanceV1 conforming to UL 94

Product details

It is configured as 3 x 3P (3 NO) power poles, rated 12 A in AC-3 utilisation category, with a 240 V AC coil.

The front face carries IP20 protection (finger-safe), so it mounts inside a standard enclosure without additional guarding on the operator side. Pollution degree 3 means it tolerates conductive pollution in industrial panel environments. Operating temperature spans -40 to 70 °C at rated coil voltage, and it derates above 3000 m altitude — no adjustment needed for most installations up to that elevation.

Frequently asked questions

What is the closest alternative to the LC3D12AU7 in the TeSys D family?

Schneider Electric does not publish a direct drop-in successor for this order code. A parametric match would need the same 3 x 3P NO contact arrangement, 12 A AC-3 rating, and 240 V AC coil voltage — but the form factor and wiring pattern of a current TeSys D star delta starter may differ. Verify the mounting footprint and terminal layout before substituting.

What compliance documentation does Schneider provide for the LC3D12AU7?

The part carries IEC 60947-1 and IEC 60947-4-1 compliance for contactors and starters. Fire resistance is tested to IEC 60695-2-1 (850 °C), and the housing meets UL 94 V-1. Climatic withstand conforms to IACS and IEC 60947-1 Annex Q category D. Protective treatment is TH per IEC 60068-2-30 (damp heat).

MPN
LC3D12AU7