2CDS272334R0051 ABB ST202M-D5 Supplementary Protector 5 A 2P D 15 kA UL1077

Why Choose the ABB ST202M-D5 Supplementary Protector?

The ABB ST202M-D5 is a compact two-pole miniature circuit breaker / supplementary protector designed to provide reliable overload and short-circuit protection for electrical equipment, control circuits and industrial automation systems. Part of the ABB System pro M compact ST200M series, this model combines a 5 A rated current, D tripping characteristic and UL 1077 supplementary protection classification.

The D characteristic is designed for circuits that can experience substantial but legitimate starting or inrush currents. This makes the ST202M-D5 particularly suitable for inductive equipment and other loads where a more tolerant instantaneous trip characteristic is required while retaining dependable thermal-magnetic protection against overloads and short circuits.

With a 2-pole configuration, 5 A current rating and 15 kA interrupting rating, the ST202M-D5 provides compact supplementary protection for industrial machinery, automation equipment and control cabinets. Its modular DIN-rail format supports straightforward integration into professional electrical assemblies requiring UL 1077 supplementary protection.

Key Advantages

• 5 A supplementary protector for reliable equipment overcurrent protection.
• 2-pole configuration provides coordinated protection and switching of two conductors.
• D tripping characteristic suited to circuits with high starting and inrush currents.
• 15 kA interrupting rating for robust short-circuit protection.
• UL 1077 classification for supplementary protection within electrical equipment.
• Compact modular construction for efficient DIN-rail panel installation.

Key Features

• ABB System pro M compact ST200M series.
• 5 A rated current.
• 2-pole configuration.
• D tripping characteristic.
• 15 kA interrupting rating.
• UL 1077 supplementary protector.
• Thermal-magnetic overload and short-circuit protection.
• Resettable protection following an overcurrent trip.
• Modular design for DIN-rail installation in control and equipment panels.

Reliable Supplementary Protection for High-Inrush Loads

Supplementary protectors such as the ABB ST202M-D5 provide overcurrent protection within industrial machinery and other electrical equipment where appropriate branch-circuit protection is provided separately. Thermal-magnetic operation combines time-dependent protection against sustained overloads with rapid magnetic operation when a sufficiently high short-circuit current occurs.

The D characteristic allows the ST202M-D5 to accommodate higher transient currents than more sensitive trip characteristics, making it useful for equipment with significant normal start-up current. Combined with its two-pole construction and UL 1077 classification, it provides practical supplementary protection for industrial controls, machinery and inductive equipment loads.

Typical Applications

• Industrial machinery and equipment panels.
• Automation and process-control systems.
• Control and auxiliary circuits with high inrush currents.
• Transformers, solenoids and other inductive equipment loads.
• Electrical equipment requiring supplementary overcurrent protection.
• OEM machinery and industrial control cabinets.