2CCG001602R0001 ABB S803PV-SP125 MCB 5 kA 3P 125 A PV String

Why Choose the ABB S803PV-SP125 MCB?

The ABB S803PV-SP125 is a high-performance three-pole miniature circuit breaker (MCB) for photovoltaic string applications, designed to protect PV modules and conductors against overloads, short circuits and reverse currents. As part of the specialised ABB S800PV-SP photovoltaic protection range, it is engineered specifically for demanding DC solar installations.

This photovoltaic circuit breaker has a 125 A rated current and a 5 kA ultimate short-circuit breaking capacity (Icu) in accordance with IEC/EN 60947-2. The S800PV-SP range is polarity independent and supports safe disconnection of all poles, simplifying its application within professional photovoltaic systems.

With its three-pole configuration and suitability for S800PV-SP applications up to 1500 V DC, the S803PV-SP125 provides robust protection and control for high-voltage photovoltaic strings. Its modular DIN-rail format makes it suitable for PV combiner boxes, DC distribution assemblies and other solar power equipment requiring dependable high-current circuit protection.

Key Advantages

• Purpose-designed high-performance MCB for photovoltaic string protection.
• 125 A rated current for high-current PV circuits.
• 5 kA ultimate short-circuit breaking capacity in accordance with IEC/EN 60947-2.
• Three-pole configuration for multi-pole DC circuit protection and isolation.
• S800PV-SP range designed for photovoltaic applications up to 1500 V DC.
• Polarity-independent design simplifies integration into DC systems.
• Protects PV modules and conductors against overloads, short circuits and reverse currents.
• Supports safe disconnection of all poles and selective string shutdown under load.

Key Features

• ABB S800PV-SP photovoltaic circuit breaker range.
• 125 A rated current.
• 5 kA Icu according to IEC/EN 60947-2.
• Three-pole design.
• Designed for PV string protection.
• S800PV-SP platform suitable for applications up to 1500 V DC.
• Polarity-independent operation.
• Safe disconnection of all poles.
• Protection against overloads, short circuits and reverse currents.
• Remote shutdown capability when combined with compatible ABB releases and accessories.

Reliable Circuit Protection for Photovoltaic Systems

Photovoltaic strings operate under demanding DC conditions that require protective devices specifically engineered for solar generation systems. The ABB S803PV-SP125 protects PV modules and conductors against overloads, short circuits and reverse currents, including reverse-current conditions that can arise from defective strings or regenerative feedback associated with inverter faults.

The S800PV-SP range combines polarity-independent operation with safe multi-pole disconnection and high-voltage DC capability. These characteristics make the S803PV-SP125 well suited to professional photovoltaic installations where dependable string protection, circuit isolation and continuity of operation are important.

Typical Applications

• Photovoltaic string circuit protection.
• Solar PV DC distribution systems.
• Photovoltaic combiner boxes.
• High-voltage DC photovoltaic installations.
• Commercial and industrial solar arrays.
• PV power generation and renewable energy equipment.
• DC distribution assemblies requiring three-pole protection.