Schneider Electric LC1D09U7 TeSys Deca 9 A Contactor 240 V AC

LC1D09U7: 9 A TeSys Deca contactor with 240 V AC coil

The LC1D09U7 is a Schneider Electric TeSys Deca contactor listed in the datasheet as: TeSys D contactor – 3P(3 NO) – AC-3 – ≤ 440 V 9 A – 240 V AC coil. The LC1D09 is the smallest frame of the TeSys Deca contactor family, rated 9 A in AC-3 at up to 440 V. It is built for small three-phase motors, solenoid and resistive loads, and for control-duty switching where panel space is limited. The same 45 mm wide body takes the larger 12, 18 and 25 A ratings, so cabinet layouts stay uniform. Seven Star LLC supplies the LC1D09U7 in Oman and the GCC as an independent supplier based in Muscat.

Decoding the reference from the datasheet title: LC1D is the three-pole TeSys Deca contactor, 09 is the 9 A frame, and U7 is the control voltage code, here a 240 V AC 50/60 Hz coil. The datasheet gives dimensions of 77 x 45 x 86 mm (H x W x D) and a net weight of 0.32 kg.

Technical specifications of the LC1D09U7

Ratings of the LC1D09U7 in motor and resistive duty

At 9 A AC-3 the datasheet lists 2.2 kW at 220/230 V, 4 kW at 380/400 V and 415/440 V and 5.5 kW at 500 V and 660/690 V, plus 5 hp at 460/480 V for three-phase motors. On resistive loads, AC-1, the contactor handles 25 A at 440 V.

Those motor ratings apply to AC-3 and AC-3e starting at up to 440 V; for AC-4 (plugging and inching) the datasheet gives a reduced figure, so a repetitive-reversing duty needs its own check. For the Omani and GCC 415 V network, the 380/400 V and 415/440 V rows are the relevant ones. Power circuit insulation is rated 690 V with an impulse withstand of 6 kV, overvoltage category III and pollution degree 3.

The 240 V AC coil on the LC1D09U7

The coil of the LC1D09U7 is rated 240 V AC 50/60 Hz. The datasheet gives an inrush of 70 VA (cos phi 0.75, at 20 °C) and a hold-in of 7 VA at 50 Hz and 7.5 VA at 60 Hz (cos phi 0.3). Dividing by the coil voltage, that is roughly 0.29 A at the moment of closing and 0.03 A while held in at 50 Hz; these are our own calculations from the VA figures and are only an order-of-magnitude guide for sizing control fuses and transformers. The coil has no built-in suppressor module, so a surge suppressor or RC network is an add-on if the coil is switched by a PLC output or a small relay. Control circuit voltage limits per the datasheet: drop-out between 0.3 and 0.6 Uc, operational at 0.8 to 1.1 Uc at 50 Hz and 0.85 to 1.1 Uc at 60 Hz in the range from -40 to 60 °C, and 1 to 1.1 Uc between 60 and 70 °C. A 240 V AC coil is matched to the nominal single-phase voltage of the Omani network, so it connects directly to a phase and neutral without a control transformer. This keeps small starter panels simple: one fused supply, one stop button, one start button, and the coil.

Wiring a 240 V AC coil: it connects directly to the phase and neutral of the Omani 240 V supply, so a small starter needs no control transformer. A single fused feed can supply the stop button, the start button, the overload contact and the coil in series, which keeps the panel simple and inexpensive to wire.

Commissioning check on a 240 V AC coil: measure the control supply at the coil and confirm it stays in the 192 V to 264 V window (0.8 to 1.1 Uc) with all loads on. If a feeder is long or heavily loaded, the lower end of that window is the one that matters at motor start, when many coils can drop out together.

Typical homes for the LC1D09U7: locally built starter panels, small water-transfer pump sets, ventilation fans and compressor controls where the local network is 240 V single-phase for control. It is also a sensible choice for a machine arriving with a nameplate of 240 V.

Contacts, terminals and service life of the LC1D09U7

The power terminals are open screw clamps taking 1 to 4 mm² flexible conductors, and the datasheet gives a tightening torque of 1.7 N.m. It carries one NO and one NC auxiliary contact, mechanically linked, with the NC also acting as a mirror contact for safety circuits.

Mechanical life is 15 million operations; at 9 A AC-3 the electrical life is 2 million, and 0.6 million at 25 A AC-1. With a 3600 operations per hour maximum rate at 60 °C, the 9 A frame suits frequent-start duties such as small conveyors and dosing pumps.

The LC1D09U7 within the LC1D09 range

All references below share the 9 A power section and differ in coil voltage. The datasheet data for ratings, terminals and endurance are the same across them; only the coil voltage changes. Against its neighbours, the 240 V AC coil is the one that matches the nominal supply of the Omani network, so no tapping or transformer is needed. The 230 V version also works on most 240 V supplies because of its window, but the 240 V coil sits closer to the middle of its range at local voltage.

Choosing the LC1D09U7: a checklist

• Motor power (up to 4 kW at 400 V in AC-3) and its full-load current at the supply voltage.
• Utilisation category: AC-3 for squirrel-cage starting, AC-1 for resistive loads up to 25 A, AC-4 only with the reduced rating.
• Coil voltage and whether the control supply is AC (this reference) or DC.
• Overload protection: thermal overload relay or motor circuit breaker that matches the 9 A frame.
• Auxiliary contact needs beyond the built-in 1 NO + 1 NC.
• Check that the control supply is nominally 240 V (not 230 V), and that the contactor coil label in the existing starter matches.
• Confirm the control supply really is 240 V AC before ordering the LC1D09U7; coil voltage cannot be changed on the contactor.

Where the LC1D09U7 works in Oman and the GCC

A 9 A contactor typically drives small circulation pumps, fan units, dosing and chemical metering pumps, roller shutters and gate motors, plus heater elements in HVAC equipment. In the Gulf it is common in packaged equipment shipped from OEMs, where the smallest frame is chosen to keep panels compact.

The 240 V AC coil matches the nominal single-phase supply of the Omani network and is easy to use in locally built starter panels. Ambient temperatures inside outdoor panels in Oman often exceed the 60 °C limit for full rating in summer; the datasheet allows operation to 70 °C with derating, but the usual practice is to shade, ventilate or air-condition the enclosure. Fine dust and humid coastal air call for sealed enclosures because the contactor itself is only IP20 on the front face.

Information to send with an RFQ for the LC1D09U7

• The reference LC1D09U7 and the quantity required
• Whether it replaces an existing LC1D09 contactor and the coil voltage printed on it
• Motor power, supply voltage and starting method (direct-on-line, reversing, star-delta)
• Number of auxiliary contacts and overload relay that will be fitted
• Delivery location in Oman or the GCC and the timing needed

Documents and quotation

A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above.

Send us the part number LC1D09U7, the quantity and the application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer.