Schneider Electric EZ9S16240 Easy9 2P 40 A Switch Disconnector

EZ9S16240: Easy9 2P, 40 A switch disconnector

The EZ9S16240 is a Schneider Electric Easy9 modular switch disconnector, listed in the datasheet as: Easy9 switch disconnector – 2P – 40 A – 400 V. It is a manual clip-on device for DIN rail distribution boards. It opens and closes the circuit by hand and offers isolation, but it has no tripping unit, so a circuit breaker or fuse must protect the circuit upstream. Seven Star LLC supplies the EZ9S16240 in Oman and the GCC as an independent supplier based in Muscat.

In the reference, Easy9 is the economy modular range, 2P is the number of poles, and the 40 A figure is the rated operational current at 400 V, utilisation category AC-22A. The two-pole 40 A version is the smallest Easy9 switch in this group. It fits the mains isolator of a single-phase consumer unit, the local switch of a split air-conditioner or water heater circuit, and the isolation point of a small sub-board in a villa or shop.

Technical specifications of the EZ9S16240

Size, terminals and endurance of the EZ9S16240

The EZ9S16240 measures 81 mm high, 36 mm wide and 66.5 mm deep, 4 modules of 9 mm, and weighs 162 g. It is a grey clip-on device with a toggle that shows ON and OFF and a contact position indicator. Terminals are listed as tunnel type terminal (top or bottom) 1 to 35 mm² rigid; tunnel type terminal (top or bottom) 1 to 25 mm² flexible, tightened to 3.5 N.m.

Mechanical durability is 8500 cycles and electrical durability is 1500 cycles. The first figure is operation without load; the second is operation while breaking current, so for a switch that is used as a regular on-off device the second number is the one that sets the maintenance interval. The 63 A sibling EZ9S16263 uses the same 36 mm body and terminals, so the choice between them is about the current of the circuit.

Reading the making and withstand data of the EZ9S16240

The datasheet gives a short-circuit making capacity of 0.6 kA and a short-time withstand current of 0.48 kA during 1 s. Both scale with the rating: the making capacity works out to 15 times the rated current and the withstand to 12 times it, across every Easy9 switch in this group. These figures are small compared with industrial switchgear, which is why the switch is meant for building and light commercial boards where an upstream breaker limits the fault energy.

Utilisation category AC-22A covers resistive and mixed inductive loads including moderate overloads. The insulation voltage is 500 V AC 50/60 Hz and the impulse withstand voltage is 4 kV. Two poles open line and neutral together, which is appropriate for single-phase supplies; on a three-phase circuit use a three or four-pole reference. Its short-circuit making and withstand figures are the lowest in the table, so make sure the upstream protective device keeps the fault energy within them.

Easy9 switch references compared with the EZ9S16240

The table lists the Easy9 switch disconnectors covered on this site; width follows the pole count.

Selection checklist for the EZ9S16240

Before ordering the EZ9S16240, check the following.

• Circuit current: 40 A at 400 V 50/60 Hz.
• Poles: 2P, and whether the neutral must be isolated.
• Upstream protection: it must hold the fault current within the making capacity of 0.6 kA.
• Space: 4 modules of 9 mm, 36 mm wide.
• Cable: tunnel type terminal (top or bottom) 1 to 35 mm² rigid; tunnel type terminal (top or bottom) 1 to 25 mm² flexible.
• Ambient temperature: -5 to 55 °C in operation, which is narrower than industrial switchgear.

Where the EZ9S16240 is used in Oman and the GCC

In Oman and the GCC, economy modular switches are common in villa and apartment boards, shop and office distribution, camp accommodation, small pump rooms and auxiliary panels. They give a local isolation point at moderate cost.

The EZ9S16240 is not an industrial switchgear item. Where the site has high temperature, dust or heavy duty, compare the datasheet range with the real conditions and consider the heavier ComPacT or Acti9 ranges instead.

Installation and maintenance of the EZ9S16240

Clip the EZ9S16240 onto the DIN rail, strip the conductors to the length marked on the device, and tighten the terminals to 3.5 N.m. Check that the toggle movement is firm and that the position indication matches the contacts. Mark the circuit it isolates, because the value of a switch disconnector is a known, labelled isolation point.

Re-check torque after the first weeks, look for heat marks, and keep the front clean. The operating range of -5 to 55 °C is narrow, so mount the board away from direct sun and ensure ventilation; a cabinet in a hot Gulf plant room can easily exceed the upper limit.

Documents and quotation

A datasheet for this product is attached on this page. It carries the electrical, mechanical and environmental data summarised above, so check it against your own single-line diagram or panel drawing before ordering.

Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and operates separately from the manufacturer.