ABB S202-C6 Two-pole Miniature Circuit Breaker, C 6 A

Ordered as 2CDS252001R0064, the S202-C6 is a two-pole breaker from the System pro M compact S200 series with a 6 A rating. It combines a delayed thermal release for overload with an electromagnetic release for short circuit, and the C curve tolerates normal switching-on surges. With a 6 kA rating under IEC/EN 60898-1, a typical job is a phase-and-neutral or two-phase control supply.

Related devices can be found under circuit breakers; for loads beyond 63 A look at the SACE Tmax XT series.

Technical specifications

Trip limits and temperature derating for 6 A

For a 6 A C-curve breaker the magnetic release acts between 30 A and 60 A (5 to 10 x In), with a delay of 0.1 to 15 s at the lower limit. The bimetal element holds at 6.78 A (1.13 x In) for one hour and must trip inside one hour at 8.7 A (1.45 x In); the reference temperature is 30 C. In warmer boards ABB’s derating table allows 5.7 A at 40 C, 5.3 A at 50 C and 4.9 A at 60 C. In a crowded row the rated current must be multiplied by 0.9, 0.8 or 0.75 for two or three, four or five, or six or more neighbours; spacing pieces cancel the factor.

Accessories for the two-pole breaker

The 2P version isolates phase and neutral together, which suits 230 V circuits that need neutral isolation. Ratings are 400 V AC (IEC/EN 60898-1), 440 V AC (IEC/EN 60947-2) and 125 V DC. Add-on parts that clip to the breaker: auxiliary and signal contact blocks, shunt and undervoltage trips, a motorised operator and the DDA 200 earth-leakage block. The body needs 35 mm of DIN rail.

What the type name tells you

In S202-C6 the S200 housing is combined with 2 poles, the C characteristic and a 6 A rating. 2CDS252001R0064 is the order number for this exact type. Before an order goes out, match the pole count, curve, current, voltage and fault level against the installation drawings and decide about accessories.

Key features of the S202-C6

• Two protected poles in a 35 mm wide body, switching both conductors of a circuit with one handle.
• C tripping characteristic with an instantaneous range of 5 to 10 x In, which rides through the moderate inrush of small transformers, power supplies, contactor coils and lighting drivers.
• Rated short-circuit capacity Icn of 6 kA under IEC/EN 60898-1 and ultimate breaking capacity Icu of 10 kA under IEC/EN 60947-2.
• Electrical endurance of 20,000 operations and an impulse withstand voltage of 4 kV.
• 35 mm² terminals top and bottom, tightened to 2.8 Nm.
• A full set of clip-on accessories from the System pro M compact range.

Where a 6 A two-pole C breaker is used

A 6 A rating sits at the low end of the S200 range and is normally chosen for control and auxiliary circuits rather than for power distribution. Typical examples are the control transformer secondary or primary in a motor control panel, 230 V supplies to PLC and instrument power supplies, panel lighting and heater circuits, and small single-phase loads in building distribution boards. The two-pole build is used where both phase and neutral must be disconnected, or where a 400 V supply is taken between two phases.

Selecting between curves and ratings

Installation and maintenance

• Snap the breaker onto 35 mm DIN rail and tighten the terminals to the stated 2.8 Nm; re-check torque during scheduled panel maintenance, because loose terminals heat up.
• Leave spacing pieces or free space in densely packed rows when the derating factors would otherwise reduce the usable current too far.
• Use the operating handle periodically on circuits that are rarely switched, as part of routine inspection.
• Fit IP40 covers or a suitable enclosure, since the device itself is IP20.

Considerations for Oman and the GCC

Distribution boards in plant rooms, rooftop enclosures and outdoor kiosks in Oman regularly see internal air temperatures well above the 30 °C reference used for the rating. ABB’s derating figures show the effect directly: at 50 °C the 6 A device carries 5.3 A. Good enclosure ventilation, shading of outdoor boards and sensible spacing help keep the breaker within its rating, and the derated value should be used when checking against the load.

What to include in an RFQ

Please give the type S202-C6 or the order code 2CDS252001R0064, the quantity, and any accessories needed such as auxiliary contacts, signal contacts, shunt trips or a DDA 200 earth-leakage block. If the breaker is replacing an existing device, mention the original make and type so the curve and breaking capacity can be compared.

Documents and quotation

Attached is the ABB data sheet for the S 200 and S 200 M breakers, containing technical data, tripping limits, derating figures, accessories and dimensions. Quotations come from Seven Star LLC, an independent supplier based in Muscat, once you give the model and the number of pieces. Price and stock are not displayed here, and the specification should be confirmed before ordering.