Schneider Electric A9Z66463 Acti9 iID 4P 63 A 500 mA B-SI

A9Z66463: Acti9 iID 4P 63 A 500 mA type B-SI RCCB

The A9Z66463 is a Schneider Electric Acti9 iID residual current circuit breaker (RCCB) with four poles, a rated current of 63 A, a sensitivity of 500 mA and protection class type B-SI (Super Immunised). The datasheet lists photovoltaic, three-phase speed drive and lift as its device applications. It clips onto a 35 mm DIN rail, is 72 mm wide (8 modules of 9 mm) and is rated 400 V AC at 50 Hz. Seven Star LLC supplies the A9Z66463 in Oman and the GCC as an independent supplier based in Muscat.

Unlike the type AC and type A iID devices, this reference is aimed at circuits where the residual current may contain a smooth DC component. IEC/EN 62423, listed among its standards next to EN/IEC 61008-1, is the standard that covers type F and type B residual current devices, which is why it appears on a type B-SI unit.

Technical specifications of the A9Z66463

Why type B-SI matters for the A9Z66463

A basic RCCB responds to sinusoidal alternating residual current. Equipment that rectifies the supply, such as inverters, speed drives and lift controllers, can leak current with a smooth DC content that blinds a type AC or type A device or saturates its core. A type B device is built to detect that kind of fault current as well as the alternating and pulsating forms. The A9Z66463 is rated for exactly the three applications Schneider names: photovoltaic installations, three-phase variable speed drives and lifts.

The SI suffix stands for Super Immunised. The datasheet backs this with an 8/20 µs impulse withstand of 3 kA and an overvoltage category of IV. In practice a super-immunised device is less likely to trip when transients, switching surges or the high-frequency leakage of electronic equipment pass through, which cuts nuisance trips on installations where they are costly.

Sensitivity of 500 mA on the A9Z66463

At 500 mA the A9Z66463 is far less sensitive than a 30 mA device and is not a personal-protection stage. A level like this is typically chosen for fire-risk protection, for group incomers feeding several outgoing circuits, or on equipment with higher normal leakage. The datasheet lists its location in the system as outgoer and group incomer, and the tripping time is instantaneous.

If the circuit also has sockets or other points where a person can touch live parts, add a 30 mA stage downstream. Because tripping is instantaneous, a fault on the downstream device may trip both unless the system is arranged so that the upstream device is selective, so check the discrimination design before commissioning.

Terminals, indicators and mounting of the A9Z66463

The A9Z66463 is 72 mm wide, 88 mm high and 73 mm deep, weighs 415 g and comes in white (RAL 9003). Double terminals are fitted at the front and the back. The front takes 1 to 35 mm² rigid, 1 to 25 mm² flexible or the same flexible size with a ferrule, and the back takes 1 to 25 mm² rigid and 1 to 16 mm² flexible, with or without ferrule. Strip 14 mm and tighten to 3.5 N.m, top or bottom. The neutral is on the left.

Front signalling includes a toggle with ON/OFF indication, a green LED for the presence of voltage and a trip indicator. A padlocking device is listed to hold the unit open during maintenance, and the contact position indicator shows whether the poles are open.

Ratings and environment of the A9Z66463

The this RCCB lists a rated insulation voltage of 500 V, an impulse withstand of 6 kV, a breaking and making capacity of Idm 1500 A and Im 1500 A, and a conditional short-circuit current of 10 kA. Durability is 20000 mechanical and 15000 electrical cycles. Protection is IP20, or IP40 in a modular enclosure, with IK05 and pollution degree 3.

Operation is listed from -25 to 60 °C up to 2000 m, and storage from -40 to 85 °C. The upper limit is a good fit for Gulf switchrooms, but the temperature inside a loaded inverter or drive cabinet should be checked, since heat from neighbouring power electronics reaches an this RCCB mounted beside them.

Selection checklist for the A9Z66463

• Residual current waveform: confirm that the loads justify type B-SI, and confirm which type the drive or inverter manufacturer requires.
• Supply: 400 V AC, 50 Hz, four poles with neutral on the left.
• Current: load up to 63 A, with a short-circuit device upstream.
• Sensitivity: 500 mA instantaneous against the protection goal.
• Approvals: the datasheet lists VDE, NF, IMQ and KEMA quality labels and CCC certification; check which your project requires.
• Space: 8 modules, 72 mm of DIN rail.

Installing and testing the A9Z66463

Isolate and prove dead, clip the this RCCB onto the rail and connect the conductors as the diagram on the housing shows, with neutral on the left. Use the 14 mm strip length and 3.5 N.m torque. Energise, confirm the green voltage LED, and use the test function to check that the device trips. Reset by hand afterwards.

Keep a record of the setting and rating, test the unit at regular intervals, and investigate before reclosing after a trip. On a drive or inverter circuit, check the cable shielding, filters and earthing first because they set the normal leakage that the A9Z66463 sees.

In the region a type B-SI device is typically considered for rooftop and carport solar installations, lift machine rooms, and pump or fan drives at water, HVAC and industrial sites. Heat, dust and humidity are the main ageing factors, so enclosure sealing and ventilation matter. Requirements for residual current protection on inverters and drives come from the equipment supplier and the project specification, and those take precedence over general guidance.

Information to send with an RFQ for the A9Z66463

• Exact reference A9Z66463 and the quantity needed.
• Equipment on the circuit, such as inverter, drive or lift controller, with its make and model.
• Supply voltage, system type and earthing arrangement.
• Upstream protective device and its rating.
• Approvals required by the project.
• Delivery location and timeline.

Documents and quotation

The Schneider Electric datasheet for the A9Z66463 is attached on this page and holds the full specification summarised above. It is dated 8 Nov 2026 as printed on the manufacturer’s document.

Send us the reference A9Z66463, quantity and delivery location and Seven Star LLC will reply to your request. We supply as an independent supplier based in Muscat and do not act for the manufacturer.