ABB SU200M UL489 Miniature Circuit Breakers

SU200M serves branch-circuit protection in industrial and commercial equipment. The trip characteristic should suit the load and its starting current: ABB distinguishes C for medium magnetic starting currents, K for higher starting currents such as motors and transformers, and Z for sensitive equipment. Check the actual time-current curve and protection requirements.

SU200M Range & Ratings

• Product scope: the existing list contains SU201M, SU202M, SU203M and SU204M references with C, K and Z characteristics. ABB presents SU200M with 1 to 4 poles and a family current range of 0.2 to 63 A; not every curve, voltage or pole arrangement supports every rating.
• UL / CSA: ABB identifies SU200M as a 10 kA UL489 range. The 480Y/277 V AC rating must be checked against the exact model and supply system; it is not a general 480 V rating. ABB selection tables apply lower current limits at this voltage depending on the curve.
• DC circuits: ABB documents 48 V DC for one pole and up to 96 V DC with two poles in series. Follow the prescribed connection and model data rather than transferring an AC rating to DC.

Standards & Model Boundaries

UL489 branch-circuit protection and UL1077 supplementary protection serve different purposes. SU200MR, SU200ML, SUP200M and SU200DC are separately designated ranges; their terminals or ratings must not be assumed for an SU200M reference.

For example, ABB identifies SU201M-C10 / 2CDS271337R0104 as a 1-pole C-characteristic 10 A device, with a 10 kA UL489 interrupting rating at 277 V AC or 48 V DC. Its IEC/EN 60947-2 ultimate breaking capacity is 15 kA at 230 V AC. These are different standard-and-voltage ratings, not interchangeable values for the whole list.

Choosing a Specific Breaker

Confirm the required approval, AC/DC voltage, supply configuration and earthing, poles, load current, starting current, trip curve and prospective fault current. Check ambient conditions, conductor and terminal requirements, and ABB coordination data where needed. Select accessories against the exact breaker and required approval.

Related pages: MCB category, MCB Accessories and S800 family overview. A related-page link does not establish interchangeability.

ABB references: SU200 range and connection boundaries; UL489 branch-circuit selection guide; SU201M-C10 product data.