Schneider Electric GC4030M5 TeSys GC 40 A 3P Contactor

GC4030M5 contactor: the largest three-pole contactor of the GC family

The GC4030M5 is the biggest unit in the TeSys GC modular range covered here: three normally open poles, 40 A in AC-7a, 15 A in AC-7b and a 220 to 240 V AC coil at 50 Hz. It is three 18 mm modules wide (54 mm) and the datasheet gives 85 mm height and 62.5 mm depth. Seven Star LLC supplies the GC4030M5 in Oman and the GCC as an independent supplier based in Muscat.

The reference reads GC40 for the 40 A frame, 30 for three poles and M5 for the 230 V coil. The coil is also the heaviest in the family: 53 VA 50 Hz (at 20 °C) at inrush and 6.5 VA 50 Hz (at 20 °C) held in, which still leaves the control circuit light compared with a motor contactor.

Technical specifications of the GC4030M5

GC modular contactor family compared with the GC4030M5

The five GC references below come from the same TeSys GC datasheet series and differ in current rating, pole count and coil. The highlighted row is the one on this page.

Thermal and coil load of the GC4030M5

Three poles at the rated current each dissipate 3.2 W, and the datasheet quotes 2.1 W at 50/60 Hz total heat dissipation. When a row of these modules sits in one board, add that figure to the heat budget of the enclosure, because the Gulf summer leaves little spare margin.

Making and breaking capacity is 120 A at 400 V, with a short-time withstand of 320 A for 10 s. Impedance per pole is 2 mOhm – Ith 40 A 50 Hz for power circuit.

Choosing a pole count: GC4030M5 against its siblings

Compared with the 25 A GC2530M5, the GC4030M5 raises the rating from 25 A to 40 A and needs 54 mm of rail instead of 36 mm. Compared with the two-pole GC4020M5 at the same 40 A, it adds a third conductor, which means it can switch a balanced three-phase heater or lighting feeder in one operation.

Nothing about the rated operational voltage changes with pole count: the datasheet limits it to 250 V AC, so verify the phase-to-phase and phase-to-neutral voltages in your circuit before assuming a 400 V network can be switched.

Order checklist for the GC4030M5

• Three 40 A poles; the datasheet lists no auxiliary contact.
• Confirm that the voltage across the poles stays inside the 250 V AC limit.
• Coil: 220 to 240 V AC, 50 Hz.
• Rail space: 54 mm for the three modules.
• Heat: allow 2.1 W for the unit plus the contribution of the neighbours.
• Sale unit: the datasheet lists a set of 4.

GC4030M5 in Oman and the GCC

Three 40 A poles suit heater banks in industrial washing and process-heating equipment, large lighting installations in warehouses, and fan-coil or air-handling panel feeders at hotels and malls.

In a hot, dusty environment the module is mounted inside a sealed board, and the datasheet shows IP20 for the module itself and IP40 in an enclosure, so the panel must provide the real protection.

Installing and maintaining the GC4030M5

Clip on the rail, upright or tilted up to 30 degrees, and wire the coil to its two control terminals. Keep power cables clear of the coil terminals to avoid accidental contact when a technician works on a live board.

Between inspections look for discoloured terminals and for a coil that buzzes. Both indicate loose connections or a low coil voltage. Replacement is by whole module.

Information to send with an RFQ for the GC4030M5

• Full reference and quantity required
• Coil voltage and frequency available on site
• Load type and current (resistive, lighting or motor)
• Number of poles and enclosure space available
• Delivery location and timing

Documents and quotation

A datasheet for the GC4030M5 is attached on this page. It carries the electrical, mechanical and environmental data summarised above, so the figures can be checked against your drawings.

Send the part number, quantity and 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.