Schneider Electric C10F1TM020 NSX100F 1P 20 A TM-D AC/DC Breaker

C10F1TM020: 20 A single-pole ComPacT NSX100F AC/DC breaker

The C10F1TM020 is a Schneider Electric ComPacT NSX100F circuit breaker with one pole, a TM-D thermal-magnetic trip unit rated 20 A, designed for both AC and DC. The datasheet describes it as: ComPacT NSX100F AC/DC, 18 kA at 240 VAC, TMD trip unit 20 A, 1 pole 1d. Seven Star LLC supplies the C10F1TM020 in Oman and the GCC as an independent supplier based in Muscat.

Reading the reference: the NSX100 frame carries up to 100 A, the F letter is the breaking-capacity level (18 kA at 240 V AC for this one-pole version), and the datasheet’s trip unit name is TM-D with a fixed 20 A thermal setting and a fixed magnetic setting of 190 A.

Technical specifications of the C10F1TM020

How the TM-D trip unit protects at 20 A

The TM-D unit is thermal-magnetic: a bimetal element for overload (L) and a magnetic element for short-circuit (I). Both are fixed on this reference. The long-time pick-up is fixed at 1 x In, which is 20 A, and the instantaneous pick-up is fixed at 190 A, about 9.5 times In (calculated).

Fixed settings keep the device simple and free from mis-adjustment, but they also mean the protection cannot be tuned for motor inrush or for selectivity. The datasheet lists no earth-leakage protection. If a load needs adjustable thresholds, a breaker with an adjustable or electronic trip unit is the route.

AC and DC ratings: where a single pole fits

The datasheet gives two sets of ratings. On AC, Ue is 277 V and Icu and Ics are 18 kA at 220/240 V; on DC, Ue is 250 V and Icu and Ics are 36 kA. A single-pole breaker has one contact gap, so it fits circuits where one conductor is switched: a phase-to-neutral circuit on a 400 V system, a single-phase supply, or a DC circuit up to 250 V where the polarity arrangement permits it.

For three-phase loads or for circuits that need all poles to open together, a multi-pole device is the correct choice; a multi-pole NSX100F version with its own datasheet ratings is the right basis.

Size, heat and mounting

Power dissipation per pole is 4.01 W, a small number, but it adds up when many one-pole breakers are packed side by side in one distribution board. The device is 35 mm wide, 161 mm high and 86 mm deep and weighs 0.7 kg, so a row of these is compact.

Mounting is on a backplate or flat on the back, with front connections at 35 mm pitch. The front face is Class II; IP40 and IK07 apply, so installation is inside an enclosed panel. The overvoltage category is IV for this single-pole version.

Related references to the C10F1TM020

The same single-pole NSX100F family is available at other ratings. The closest neighbour in the range we handle is C10F1TM030, which differs in the thermal setting and the fixed magnetic pick-up (30 A and 300 A), while the frame, voltage and breaking capacity are the same. Other ratings exist in the family; ask us for current availability.

Choose between neighbouring ratings on the load current and conductor size, not on the breaker alone: the breaker rating must protect the cable.

Installing and maintaining the C10F1TM020

Mount the C10F1TM020 on the backplate or flat on the back as the installation instructions allow, connect the cable to the front terminals and torque it to the manufacturer’s value. Switch the toggle through its positions to confirm free operation, and record the nominal 20 A setting on the circuit schedule.

Maintenance is limited: periodic inspection of terminals for heat discolouration, a manual operation test and, after any trip, a check of the cause before reclosing. Mechanical durability is 20000 cycles; electrical durability is 20000 cycles at 277 V In/2 and 10000 cycles at 277 V In.

Applications in Oman and the GCC

In Oman and the GCC, a 20 A one-pole breaker is typical for lighting circuits, small fan and pump circuits, control power and instrumentation supplies in plants, camps and buildings. DC capability up to 250 V also makes it usable on battery and UPS circuits in substations and telecom rooms.

Selection and RFQ information for the C10F1TM020

• Load current and cable size, against the 20 A fixed rating.
• System: AC up to 277 V or DC up to 250 V, and the fault level.
• Pole count: single-pole here; two- or three-pole devices need different references.
• Accessories required.
• Quantity and delivery location in Oman or the GCC.

Send the part number C10F1TM020, the quantity and the delivery location, and if possible the circuit voltage and fault level.

Quote C10F1TM020 exactly on any purchase request.

The C10F1TM020 datasheet is the reference for the values above.

Documents and quotation

The official English datasheet for the C10F1TM020 is attached on this page. It lists the trip settings, ratings, dimensions and environmental data used above.

To request a quotation, send the part number C10F1TM020, the quantity and the delivery location. Seven Star LLC is an independent supplier in Muscat and quotes according to current availability.