Schneider Electric A9N61508 C60H-DC 1P 10 A C Curve

A9N61508: C60H-DC 1P 10 A C-curve breaker

The A9N61508 is a Schneider Electric Acti9 C60H-DC miniature circuit-breaker with 1 protected pole, a rated current of 10 A and a C trip curve. Although the shop title only says miniature circuit breaker, the datasheet lists the network type as DC, so this is a direct-current device and should not be confused with the AC members of the Acti9 range. Seven Star LLC supplies the A9N61508 in Oman and the GCC as an independent supplier based in Muscat.

Reading the reference from the datasheet rather than from the number itself: A9N61508 is the 10 A step in the 1-pole ladder, it is rated for 250 V DC, and it occupies 2 modules of 9 mm on the DIN rail. A single-pole version has one switching contact, so the other conductor of the circuit is not interrupted by the breaker.

Technical specifications of the A9N61508

1P and 2P C60H-DC references in the family

The single-pole ladder that we handle includes A9N61511 (16 A), A9N61512 (20 A), A9N61519 (63 A). A9N61508 shares the 250 V DC rating, 0.128 kg weight and 2-module width with them, so current rating is the one datasheet difference between these four.

The two-pole references (A9N61521 (1 A), A9N61522 (2 A), A9N61523 (3 A), A9N61524 (4 A), A9N61525 (5 A), A9N61526 (6 A), A9N61528 (10 A), A9N61531 (16 A), A9N61532 (20 A), A9N61533 (25 A), A9N61535 (32 A), A9N61539 (63 A)) have a different electrical personality: a 500 V DC rated voltage, 4 modules of width and 0.256 kg. Choose the 2P series if the system voltage is above 250 V DC or if you want both conductors disconnected by one operating handle.

Installation, commissioning and maintenance of the A9N61508

The A9N61508 clips onto a 35 mm symmetrical DIN rail and is fixed mounting. The power terminals, top or bottom, accept a tightening torque of 2.5 N.m; use a calibrated driver rather than judgement, because DC contacts that are under-tightened heat up and can degrade slowly. The datasheet lists comb busbar compatibility at top or bottom in standard configuration, which allows neat feeder groups in a distribution board.

At commissioning, verify polarity against the wiring diagram, operate the toggle several times, confirm that the contact position indicator and the ON/OFF indication agree with the actual state, and check that the padlocking provision in position O works with your lock-out procedure. Mechanical durability is stated as 20000 cycles and electrical durability as 3000 cycles at L/R = 2 ms, so an annual operation check is reasonable, but do not use the breaker as a routine switch for heavy inductive loads.

What to send with an RFQ for the A9N61508

To quote the A9N61508 quickly, send the complete part number, the quantity, the system DC voltage and earthing arrangement, the highest prospective fault current, whether you need 1 pole, and the delivery location in Oman or the GCC. Mention if it replaces an existing device so we can compare labels.

How a thermal-magnetic DC breaker protects the circuit

The A9N61508 uses a thermal-magnetic trip unit. The thermal element reacts to a sustained overload by bending as the conductor heats, giving a delayed trip that tolerates short switching surges. The magnetic element reacts to a short circuit almost instantly. The curve code on the datasheet is C, which places the instantaneous threshold higher than a B curve and suits loads with moderate inrush.

Interrupting direct current is harder than interrupting alternating current because there is no natural current zero to help extinguish the arc. That is the reason the datasheet gives breaking capacity separately for each DC voltage: 20 kA at 110 V DC, 10 kA at 220 V DC and 6 kA at 250 V DC. Service capacity Ics, at 75 % of those values, is 15 kA at 110 V DC, 7.5 kA at 220 V DC and 4.5 kA at 250 V DC. The lower the system voltage, the higher the fault current the device can clear, so always compare the prospective fault current at your actual bus voltage with the matching line, not with the largest number.

Selecting the A9N61508 for your DC circuit

The 10 A step is where branch cabling starts to become more than control-wire and the conductor, not the breaker, often sets the limit. A 10 A rating sits in the middle of the family and is commonly used for DC lighting circuits, small converters, control cabinets supply lines and motor-control auxiliaries. Compare the continuous current with the 10 A rating after considering enclosure temperature, because the value on the datasheet refers to 25 °C. If several breakers sit side by side on the same rail, allow for mutual heating. This is the first step of the 1-pole ladder in our lane; the next rating up is A9N61511 at 16 A.

• Highest system voltage: must not exceed 250 V DC.
• Prospective short-circuit current at the breaker location, compared with the Icu line for that voltage.
• Continuous load current and ambient temperature inside the enclosure.
• Number of poles needed: 1 here; confirm whether your earthing arrangement needs both conductors switched.
• Polarity or terminal markings: follow the marks on the device and the wiring diagram supplied with the installation.

Typical use of the A9N61508 in Oman and the GCC

DC distribution appears in the region in substations, power plants, telecom shelters, solar-powered monitoring stations, battery rooms and process control cabinets in oil and gas, petrochemical and desalination facilities. A mid-range branch like this one, rated 10 A, is usually found on control-room auxiliary supplies and converter inputs. The datasheet gives an operating range of -25 to 70 °C, tropicalisation level 2, pollution degree 3 and altitude up to 2000 m, which is a useful starting point for panels in hot, dusty, humid coastal sites; keep panels out of direct sun.

Documents and quotation

A datasheet for the A9N61508 is attached on this page. The copy we reviewed is dated 8 Nov 2026 and lists the environmental data of the reference as well as the electrical values above.

Send the part number and your project details through the RFQ form; Seven Star LLC will confirm availability and lead time in Oman and the GCC.