ABB S800 High Performance Circuit Breakers

ABB presents S800 for commercial and industrial distribution and critical-power applications such as data centers, hospitals and telecommunications. Dedicated variants address renewable-energy and other specialist circuits. Suitability depends on the specific range, model and electrical system.

Understanding the References on This Page

• S800C, S800N and S800S: high performance circuit-breaker ranges. Select the trip characteristic, poles, current and breaking capacity from the exact model documentation.
• S800S-UC: a dedicated range for DC applications. Confirm the pole connection and DC ratings rather than applying AC ratings.
• S800HV: a dedicated high-voltage AC range; it must not be treated as a standard S800S breaker.
• S800PV-S: photovoltaic string-protection circuit breakers. S800PV-M: switch-disconnectors for PV DC isolation. Isolation and overcurrent protection are different functions.
• S800S-SCL and SCL-SR: short-circuit-limiter references requiring a verified coordination arrangement. ABB documents automatic reset for SCL-SR; do not transfer that function to an SCL reference without the SR designation.
• Busbar and link references: accessories also appear in the list. Their suitability must be checked for the exact device and installation.

Ratings, Standards & Selection Boundaries

As an example, ABB identifies S804S-C50 / 2CCS864001R0504 as a 4-pole, C-characteristic, 50 A high performance circuit breaker. This example does not define the ratings of other references.

• Breaking capacity: ABB describes S800S with capacity up to 50 kA under IEC/EN 60947-2. Confirm the exact Icu/Ics, voltage and configuration. Do not apply this family maximum to S800C, S800N, PV or accessory entries.
• Standards: distinguish IEC circuit-breaker ratings from UL ratings. ABB lists S800S, S800C and S800P in its UL1077 supplementary-protection portfolio; S800U is a separate UL489 range. Do not infer UL489 approval from the S800 name.
• PV isolation: ABB documents S800PV-S circuit breakers under IEC 60947-2 and S800PV-M switch-disconnectors under IEC 60947-3. Check the complete suffix, current, DC voltage, earthing arrangement and prescribed connections.
• Coordination and accessories: selectivity, back-up protection and limiter combinations require ABB coordination data for the actual upstream and downstream devices.

Information Needed to Select a Device

Confirm the function first: overcurrent protection, DC isolation, short-circuit limiting or an accessory. Then specify AC/DC voltage, poles, rated current, trip characteristic, prospective fault current, required standard and installation conditions. For PV circuits, include maximum system voltage and the earthing arrangement. Provide the existing device codes when checking coordination or accessories.

Related references: MCB product category and MCB Accessories. These links do not establish accessory compatibility.

ABB sources: S800 family overview; S800 technical catalogue (2017); S800PV-S / S800PV-M technical catalogue.