2CDS273334R0257 ABB ST203M-K1.6 Miniature Circuit Breaker 1.6 A 3P K 15 kA UL1077

Why Choose the ABB ST203M-K1.6 Miniature Circuit Breaker?

The ABB ST203M-K1.6 is a compact 3-pole miniature circuit breaker (MCB) designed for supplementary overcurrent and short-circuit protection in industrial machinery, control panels and electrical equipment. As part of the ABB ST200M series, it combines a 1.6 A rated current with K-characteristic tripping and compliance with the UL 1077 standard.

The ST203M-K1.6 uses thermal-magnetic protection to respond to sustained overloads and short-circuit faults. Its K tripping characteristic is particularly suited to industrial circuits and inductive loads where normal operation can involve elevated starting or inrush currents, helping reduce unwanted tripping during equipment start-up.

With a 3-pole configuration, 1.6 A rated current and 15 kA short-circuit rating, the ST203M-K1.6 provides dependable supplementary protection for three-pole industrial circuits. ABB order code 2CDS273334R0257 identifies this specific ST200M configuration.

Key Advantages

• Reliable 3-pole supplementary circuit protection for industrial equipment.
• 1.6 A rated current suited to low-current control and equipment circuits.
• K tripping characteristic accommodates elevated starting and inrush currents.
• 15 kA short-circuit rating for robust fault protection.
• UL 1077 compliant for supplementary overcurrent protection.
• Compact modular construction for integration into industrial control panels.

Key Features

• ABB ST200M miniature circuit breaker series.
• 3-pole configuration.
• 1.6 A rated current.
• K-characteristic thermal-magnetic tripping.
• 15 kA short-circuit rating.
• Designed for supplementary overcurrent and short-circuit protection.
• Suitable for industrial control and inductive-load circuits within its specified ratings.
• Compact modular design for electrical control and automation assemblies.

Reliable Supplementary Protection for Industrial Control Circuits

Miniature circuit breakers such as the ABB ST203M-K1.6 protect conductors and connected equipment by automatically interrupting current during overload or short-circuit conditions. Thermal protection responds to sustained overloads, while the magnetic trip mechanism provides rapid operation when significant fault currents occur.

The K tripping characteristic is well suited to applications where normal switching or starting can produce temporary current peaks. Combined with its UL 1077 supplementary protection classification, the ST203M-K1.6 is particularly useful for industrial control equipment and inductive loads requiring dependable protection while accommodating normal inrush conditions.

Typical Applications

• Industrial machinery and machine control panels.
• Low-current industrial control circuits.
• Inductive-load circuit protection.
• Automation and production equipment.
• Electrical equipment requiring supplementary protection.
• OEM control assemblies using UL 1077 supplementary protectors.