Schneider Electric A9D51210 iC60H RCBO 2P 10 A C 300 mA

A9D51210: Acti9 iC60H RCBO 2P 10 A C curve 300 mA

The A9D51210 is a Schneider Electric Acti9 iC60 RCBO, a residual current breaker with overcurrent protection. The datasheet lists it as iC60H2 RCBO with 2P, 10 A at 50 °C, curve C, 300 mA earth-leakage sensitivity, type A earth-leakage protection and a 10000 A breaking capacity at 240 V AC. Seven Star LLC supplies the A9D51210 in Oman and the GCC as an independent supplier based in Muscat.

One device combines the overcurrent protection of a miniature circuit breaker with the residual current protection of an RCCB, so a single circuit gets both functions in a 36 mm body (4 modules of 9 mm).

Technical specifications of the A9D51210

Earthing systems and wiring for the A9D51210

The datasheet lists the earthing system for this unit as TT / TN / IT. The three systems listed make it flexible across installations, but the protection chain and fault-loop calculation still have to be verified on site. The device has a left-hand neutral position and the connection diagram printed on the front must be followed. It is a two-pole device in a double-width body, with both conductors connected through the unit.

Selection checklist for the A9D51210

• Circuit: 2P at 230/240 V AC, 10 A, protected cable sized for that rating.
• Curve: C for general lighting, sockets and small motors.
• Sensitivity: 300 mA against the protection goal.
• Earthing: TT / TN / IT per the datasheet.
• Fault level: compare 10000 A with the prospective short-circuit current.
• Space: 4 modules, 36 mm.

Where the A9D51210 sits among iC60H RCBOs

The four iC60H RCBO references in this lane differ in pole description, rating, curve and sensitivity.

Installation and testing of the A9D51210

Isolate and prove dead, clip the A9D51210 onto the rail and connect the conductors following the diagram on its face, tightening to the torque values above. After energising, operate the test function on the device and confirm that it trips, then reset it.

A trip can come from overload, short circuit or leakage, so find the cause before closing the device again. Repeated residual trips usually point to damaged insulation or wet equipment on that circuit.

C curve and 10 A rating on the A9D51210

C-curve devices are designed to trip magnetically between roughly 5 and 10 times the rated current, the usual compromise for lighting, sockets and small motors. For 10 A that is about 50 to 100 A. This band is the general characteristic of the curve and is not a figure quoted in the datasheet, so check the manufacturer’s curve for the exact limits.

The breaking capacity of this unit is 10000 A at 240 V AC and the service breaking capacity Ics is 7500 A, with limitation class 3 in the datasheet. Compare the 10000 A value with the prospective short-circuit current at the board, and size the cable first from the load and installation method, then choose the 10 A device to protect it.

Typical uses of the A9D51210 in Oman and the GCC

RCBOs like this unit are typically specified where a single circuit needs both overcurrent and leakage protection, for example pump houses and kiosks, clinics and schools and site offices and camps. Heat, dust and coastal humidity are the main ageing factors, so keep the enclosure closed and test the residual function regularly. For critical loads follow the project specification over general advice.

Information to send with an RFQ for the A9D51210

• Exact reference A9D51210 and the quantity needed.
• Supply voltage, system type and earthing arrangement.
• Load description and cable size for the circuit.
• Prospective short-circuit current at the board, if known.
• Other ratings or curves needed in the same order.
• Delivery location and timeline.

Before ordering, check that the board enclosure, busbar arrangement and neighbouring devices leave enough room for heat to escape, since crowded boards in hot rooms run closer to their limits than the rated ambient suggests.

Keep a record of the installed ratings on the board schedule and note the supply voltage at commissioning, because later extensions and fault investigations depend on knowing exactly what protects each circuit.

Spare devices of the same rating, pole count, sensitivity and type are worth planning for sites that run continuously, since a like-for-like replacement keeps the original protection design intact after a trip or a fault.

If the board will be extended later, leave spare rail length and think about how added circuits change the leakage current seen by this device, which affects how close it runs to its trip threshold.

Documents and quotation

The Schneider Electric datasheet for the A9D51210 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 A9D51210, 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.