2CDS271334R0021 ABB ST201M-D2 2A 1P D Curve Miniature Circuit Breaker

Why Choose the ABB ST201M-D2 Miniature Circuit Breaker?

The ABB ST201M-D2 is a high-performance single-pole miniature circuit breaker (MCB) / supplementary protector designed to provide reliable overcurrent and short-circuit protection in industrial and commercial electrical systems. With ABB order code 2CDS271334R0021, it forms part of the ABB ST 200 M series of modular circuit protection devices.

Designed for demanding applications requiring dependable circuit protection in a compact DIN-rail format, the ST201M-D2 combines thermal and magnetic tripping to protect electrical equipment and conductors against overload and short-circuit conditions. Its D tripping characteristic is particularly suited to circuits containing equipment with higher starting or inrush currents.

The ST201M-D2 has a rated current of 2 A and a single-pole configuration. It is certified to UL 1077 for supplementary protection, with a 10 kA interrupting rating at 240 V AC, 277 V AC and 60 V DC. The ST 200 M series also provides a rated ultimate short-circuit breaking capacity of up to 15 kA under applicable IEC conditions.

Key Advantages

• Compact single-pole miniature circuit breaker for supplementary circuit protection.
• 2 A rated current for protecting low-current electrical and control circuits.
• D tripping characteristic suitable for loads with higher starting and inrush currents.
• ST 200 M series with 15 kA short-circuit breaking capacity under applicable IEC conditions.
• 10 kA UL 1077 interrupting rating at 240 V AC, 277 V AC and 60 V DC.
• Compact DIN-rail modular construction simplifies installation in electrical control and distribution panels.

Key Features

• ABB ST 200 M series miniature circuit breaker.
• 2 A rated current.
• Single-pole (1P) configuration.
• D-curve tripping characteristic.
• UL 1077 supplementary protector.
• 10 kA interrupting rating at 240 V AC and 277 V AC.
• 10 kA interrupting rating at 60 V DC.
• Thermal-magnetic protection against overload and short-circuit conditions.
• Compact modular design for DIN-rail installation.

Reliable Circuit Protection for Industrial Systems

Miniature circuit breakers such as the ABB ST201M-D2 provide automatic protection against overload and short-circuit conditions. When current exceeds the permitted operating range, the thermal-magnetic tripping mechanism disconnects the circuit, helping protect connected wiring and electrical equipment from damaging overcurrent conditions.

The ST 200 M series is designed for demanding industrial and commercial applications where compact modular protection and dependable switching performance are required. The ST201M-D2's 2 A rating and D tripping characteristic make it particularly suitable for low-current circuits supplying equipment that can produce comparatively high starting currents, while its UL 1077 classification supports use as a supplementary protector within electrical equipment.

Typical Applications

• Industrial control panels and automation systems.
• Machine control and auxiliary circuits.
• Low-current electrical equipment protection.
• Circuits supplying loads with higher starting or inrush currents.
• Supplementary protection within electrical equipment.
• Commercial and industrial electrical distribution panels.