Schneider Electric R9F12110 Resi9 1P 10 A C-curve MCB

R9F12110: Resi9 1P 10 A C-curve miniature circuit breaker

The R9F12110 is a Schneider Electric Resi9 miniature circuit breaker (single-pole, 10 A, C curve) with thermal-magnetic tripping and a 6000 A breaking capacity at 230 V AC. It clips onto a DIN rail, carries ON/OFF indication on the toggle and is finished in white (RAL 9003), the colour that distinguishes the Resi9 range from the grey Easy9 range. Seven Star LLC supplies the R9F12110 in Oman and the GCC as an independent supplier based in Muscat.

Reading the reference: across the references in this lane the digit after R9F12 follows the pole count and the last two digits follow the rated current, so R9F12110 reads as 1P and 10 A. This is our reading of the pattern and the product title, not a published ordering table, so always confirm the full reference. With one protected pole it breaks the phase conductor only and is intended for a single-phase branch where the neutral runs separately. The datasheet quotes 230 V AC as the operating voltage.

Durability and environment for the R9F12110

The Resi9 datasheet lists 20000 cycles mechanical and 10000 cycles electrical operating cycles, which are higher than the 10000 and 4000 cycles that the Easy9 datasheets in the same lane quote. For a board that is switched often, for example circuits that are isolated at every maintenance visit, that margin is worth noting. Protection is IP20, pollution degree 2 and tropicalisation level 2.

Operating ambient is -25 to 60 °C and storage -40 to 60 °C, with humidity up to 95 % at 55 °C. In a Gulf building, enclosure temperature can be much higher than room temperature, and a breaker carrying its full rating in a closed board will run hotter than one lightly loaded, so allow for derating margin and ventilation. This unit itself is not a weatherproof device; the enclosure must keep dust and water away.

Technical specifications of the R9F12110

Typical uses of the R9F12110 in Oman and the GCC

Resi9 is aimed at residential and small commercial boards, so this unit is most often specified for shop fit-outs and retail units, warehouse lighting and socket groups and site offices and camp accommodation. Long summer peaks mean cooling circuits run near their rating for months, which makes the choice of 10 A and the board ventilation more important than in cooler climates. Dust and humidity near the coast reinforce the need for a closed, well-sealed enclosure because the breaker body is IP20.

Where the R9F12110 sits among Resi9 references

The table compares nearby Resi9 C-curve references with the same 6000 A class. Pole count drives width and voltage, while the amp rating changes the magnetic trip band and sometimes the terminal size.

Installation and upkeep of the R9F12110

De-energise and prove dead, then clip the R9F12110 onto the rail and check that the toggle moves freely. Insert stripped conductors fully, tighten to 2 N.m with a calibrated driver, and fit ferrules where the datasheet lists flexible cable with ferrule. After switching on, confirm that the ON/OFF indication matches the toggle position and label the circuit.

Re-torque terminals during scheduled inspections, especially in boards that are warm or that carry vibration, and look for discoloured plastic that signals heat at a termination. If a breaker trips on a short circuit, find the cause before resetting; if it trips repeatedly on a normal load, the rating or the load is wrong rather than the device.

Dimensions, terminals and wiring of the R9F12110

The R9F12110 measures 18 mm wide by 81 mm high and 72 mm deep, with an embedding depth of 44 mm, and weighs 120 g net. That is 2 modules of 9 mm, so it occupies 1 standard pole width of 18 mm on the rail. Terminals are tunnel type at the top and bottom and accept 1–25 mm² – rigid; 1–16 mm² – flexible with ferrule; 1–16 mm² – flexible. Strip conductors to 14 mm and tighten to 2 N.m.

At 18 mm this is the slimmest device in the lane, the choice when many single-phase circuits have to share one small consumer unit.

Information to send with an RFQ for the R9F12110

• Exact reference R9F12110 and the quantity needed.
• Supply voltage, system type and earthing arrangement.
• Prospective short-circuit current at the board, if known.
• Load description and cable size for the circuit.
• Other poles or ratings needed in the same order.
• Delivery location and timeline.

Before ordering, also check that the board enclosure, busbar arrangement and neighbouring breakers leave enough spacing for heat to dissipate, 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 and what the upstream device allows through.

Spare breakers and matching ratings are worth planning for sites that run continuously, since a replacement of the same rating, pole count and curve keeps the original protection design intact when a unit has to be changed after a trip or a fault.

If the board will be extended later, leave spare rail length and consider how added circuits will change the total load and heat inside the enclosure, which affects how close each breaker will run to its rating in summer.

Documents and quotation

The manufacturer datasheet for the R9F12110 is attached on this page and holds the full specification summarised above.

Send us the reference R9F12110, quantity and delivery location and Seven Star LLC will reply to your request. We supply as an independent supplier based in Muscat.