1SDA054225R1 ABB T4L 250 TMD 20-200 3P F F Moulded Case Circuit Breaker 20 A

Why Choose the ABB T4L 250 TMD 20-200 3P F F Circuit Breaker?

The ABB 1SDA054225R1 is a high-performance SACE Tmax T4L moulded case circuit breaker (MCCB) designed for reliable protection and switching in industrial and commercial low-voltage electrical distribution systems. Part of the proven ABB SACE Tmax T series, this three-pole circuit breaker combines a compact T4 frame with a thermomagnetic TMD trip unit for dependable overload and short-circuit protection.

The T4L configuration provides a high short-circuit breaking capacity for demanding power distribution applications. Its TMD thermomagnetic release provides adjustable thermal overload protection together with fixed magnetic short-circuit protection, helping safeguard cables, switchgear and downstream electrical equipment against damaging overcurrents.

With a 20 A rated current, three-pole construction and fixed installation with front terminals, the 1SDA054225R1 is suitable for straightforward integration into switchboards and distribution panels. The T4L performance level provides an ultimate short-circuit breaking capacity of up to 120 kA at 380–415 V AC, making this MCCB particularly suitable for installations where high prospective fault currents are present.

Key Advantages

• High-performance ABB SACE Tmax T4L moulded case circuit breaker.
• 20 A rated current for low-voltage power distribution protection.
• Three-pole configuration for three-phase electrical systems.
• TMD thermomagnetic trip unit provides overload and short-circuit protection.
• Adjustable thermal protection allows the breaker to be matched to the protected circuit.
• High breaking capacity of 120 kA at 380–415 V AC.
• Fixed installation with front terminals for convenient switchboard integration.
• Robust Tmax construction designed for demanding industrial electrical distribution systems.

Key Features

• ABB SACE Tmax T4 series.
• T4L 250 frame with L short-circuit performance level.
• 20 A rated current.
• 3-pole circuit breaker configuration.
• TMD thermomagnetic release.
• Thermal trip adjustment of approximately 0.7–1 × In.
• Fixed magnetic short-circuit protection.
• 690 V AC rated operational voltage.
• 1,000 V rated insulation voltage.
• 8 kV rated impulse withstand voltage.
• Fixed circuit-breaker installation with front terminal connections.
• High electrical and mechanical operating endurance.

Reliable Circuit Protection for Power Distribution

Moulded case circuit breakers such as the ABB SACE Tmax T4L protect electrical distribution circuits against overloads and short circuits while also providing a convenient means of circuit isolation and switching. The TMD trip unit combines thermal overload protection with magnetic short-circuit protection, providing dependable protection without requiring a separate electronic trip system.

The T4L's high short-circuit performance makes it particularly well suited to industrial installations where prospective fault currents can be substantial. Its compact fixed configuration and front terminals simplify installation in switchboards, control panels and power distribution assemblies while maintaining the protection performance expected from the ABB SACE Tmax range.

Typical Applications

• Industrial low-voltage power distribution systems.
• Electrical switchboards and distribution panels.
• Three-phase feeder circuit protection.
• Manufacturing and process plant electrical systems.
• Commercial and infrastructure power distribution.
• Machine and production-line electrical panels.
• Protection of cables and downstream electrical equipment.
• Installations with high prospective short-circuit currents.