Schneider Electric C10N1TM063 NSX100N 1P 63 A AC/DC Breaker

Choosing the C10N1TM063: a 63 A one-pole NSX100N for AC and DC feeders

The C10N1TM063 is the 63 A version of the one-pole ComPacT NSX100N moulded-case breaker from Schneider Electric. Its datasheet title reads: Circuit breaker ComPacT NSX100N AC/DC, 25kA at 240VAC, TMD trip unit 63A, 1 pole 1d. It protects one conductor, uses a fixed thermal-magnetic trip unit and fits into a body 35 mm wide, which makes it a compact way to protect a mid-sized single-pole feeder. Seven Star LLC supplies the C10N1TM063 in Oman and the GCC as an independent supplier in Muscat.

Reading the part number with the datasheet beside it: C10 stands for the NSX100 frame, N for the breaking-capacity class (datasheet code: N 25 kA 240 V AC), 1 for one pole, TM for the thermal-magnetic trip unit and 063 for the 63 A rating. The datasheet gives the poles description as 1P with 1D protected.

What the 63 A rating means for heat and loading

The thing that most separates the C10N1TM063 from lower ratings in the same frame is how much heat it produces. The datasheet gives a power dissipation of 8.61 W per pole at its rated current. That figure is more than twice the 4.01 W given for the 20 A C10N1TM020 in the same housing, even though the housing is identical. In a ventilated cabinet this is minor; in a sealed, sun-exposed enclosure a row of several such breakers contributes noticeably to internal temperature.

Since the C10N1TM063 rated current is stated at 40 °C, a designer should compare 63 A with the real air temperature around the breaker, not the room temperature of the control building. If the enclosure runs hot in Gulf summer conditions, a conservative loading margin or better ventilation protects both the breaker and the cables connected to it.

Technical specifications of the C10N1TM063

Fixed trip settings of the C10N1TM063 and what they imply

The trip unit is a TM-D with the protection functions L and I. Overload protection is thermal, with a fixed long-time pick-up of 1 x In and a fixed delay, and short-circuit protection is magnetic with a fixed instantaneous pick-up of 500 A. There are no adjustment dials on the C10N1TM063. For the user this means the curve is known from the part number alone, which simplifies spares and documentation.

The 500 A threshold is roughly eight times the rated current. Loads with brief starting peaks, for example a group of fan motors or a transformer energising, should be checked against that value. If the peak is above 500 A, the C10N1TM063 will trip on switching rather than on a real fault, and a different breaker type would be required.

Voltage and fault-level limits for the C10N1TM063

On AC the datasheet limits the breaker to 277 V at 50/60 Hz and an Icu of 25 kA at 220/240 V. On DC the limit is 250 V with an Icu of 50 kA. The service breaking capacity Ics matches the Icu values in both cases. A one-pole breaker like this is usually applied to one phase to neutral or to one polarity of a DC circuit; the installation design should confirm that a single break is acceptable for the circuit and that voltage across the pole never exceeds the stated values.

Insulation data: rated insulation voltage 750 V AC at 50/60 Hz and rated impulse withstand voltage 8 kV. The datasheet also lists Category A utilisation, overvoltage category IV and pollution degree 3.

Mounting and servicing the C10N1TM063

The breaker is fixed-mounted on a backplate and can be installed horizontally, vertically or flat on its back. Cables enter at the front on both ends, with a 35 mm pitch. Because the breaker has a toggle handle and Class II protection on the front face, the handle is the only part the operator touches. IP40 and IK07 are the degrees listed; anything more demanding in terms of water or dust needs an enclosure around it.

For service planning, the datasheet gives mechanical durability of 20000 cycles and electrical durability of 20000 cycles at 277 V and In/2, falling to 10000 cycles at 277 V and In. When the 63 A is regularly loaded close to its limit and operated often as a switch, those electrical figures set the review interval. After a trip, find the cause first; a thermal-magnetic breaker is not a substitute for finding an overload.

Where a 63 A one-pole breaker is used in the region

Typical uses for the C10N1TM063 include single-phase distribution sub-circuits in commercial buildings, 250 V DC supplies for battery and control systems in substations and plants, and feeders to small process equipment in oil and gas, desalination and power facilities in Oman and the GCC. Heat, fine dust and coastal humidity are the three conditions that matter most. The datasheet allows relative humidity from 0 to 95 % and operation up to 2000 m without derating, which covers most sites in the region.

Comparing the C10N1TM063 with other ratings in the series

The same NSX100N one-pole body is also offered with lower ratings. The table compares the C10N1TM063 with the 20 A C10N1TM020 using their datasheet values.

RFQ checklist for the C10N1TM063

• The exact part number C10N1TM063 and quantity.
• Whether the circuit is AC or DC, the voltage and the available short-circuit current.
• Expected continuous current and peak starting current.
• Panel ambient temperature and whether the enclosure is ventilated.
• Delivery location and required documents.

Documents and quotation

A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above, and it is the document to check against your own drawings.

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 is not affiliated with the manufacturer.