1SDA101955R1 ABB XT4V 160 MA 12.5A 3P Fixed MCCB

Why Choose the ABB XT4V 160 MA 12.5 1SDA101955R1 Circuit Breaker?

The ABB 1SDA101955R1 is a SACE Tmax XT4V moulded case circuit breaker (MCCB) designed particularly for motor protection and other low-voltage applications requiring magnetic short-circuit protection. This three-pole fixed breaker uses ABB’s MA magnetic-only trip unit, with a rated current of 12.5 A and an adjustable instantaneous magnetic trip range of 62.5–125 A.

As part of the ABB SACE Tmax XT family, the XT4V combines a compact XT4 frame with high short-circuit interruption performance. The V performance level provides an ultimate short-circuit breaking capacity of up to 150 kA at 415 V AC, making this breaker suitable for applications where high prospective fault currents must be interrupted reliably.

The 1SDA101955R1 is supplied in a three-pole fixed configuration with front terminals. Because its MA release provides magnetic short-circuit protection rather than conventional thermal overload protection, it is particularly suited to motor circuits where overload protection is provided separately by an appropriate motor overload device.

Key Advantages

• Compact 12.5 A motor-protection MCCB from the ABB SACE Tmax XT range.
• MA magnetic-only trip unit provides dedicated short-circuit protection.
• Adjustable instantaneous magnetic trip setting from 62.5–125 A.
• Magnetic adjustment corresponds to approximately 5–10 × rated current.
• XT4V high-breaking-capacity platform for demanding fault-current conditions.
• Ultimate short-circuit breaking capacity up to 150 kA at 415 V AC.
• Three-pole configuration for three-phase motor and distribution circuits.
• Fixed construction with front terminals for straightforward switchboard integration.
• Well suited to coordination with separate motor overload protection.

Key Features

• ABB SACE Tmax XT4V moulded case circuit breaker.
• XT4 160 frame.
• 12.5 A rated current.
• Three-pole configuration.
• MA magnetic trip unit.
• Instantaneous magnetic short-circuit protection.
• 62.5–125 A adjustable instantaneous trip range.
• 5–10 × In magnetic adjustment range.
• V high-breaking-capacity performance level.
• 150 kA ultimate breaking capacity at 415 V AC.
• Rated operational voltage up to 690 V AC.
• Fixed installation.
• Front main-circuit terminals.
• Lever operating mechanism.
• Designed particularly for motor short-circuit protection.

Magnetic Short-Circuit Protection for Motor Circuits

The MA magnetic trip unit is designed to respond rapidly to high short-circuit currents without incorporating a conventional thermal overload element. On the 1SDA101955R1, the instantaneous magnetic threshold can be adjusted between 62.5 A and 125 A, equivalent to approximately 5–10 times the breaker’s 12.5 A rated current. This adjustment helps accommodate motor starting currents while maintaining effective protection against severe fault conditions.

Because the MA release is intended principally for short-circuit protection, motor overload protection should be provided by an appropriately coordinated external overload relay or equivalent protective device. Combined with the XT4V platform’s high short-circuit breaking capability, this makes the breaker particularly useful in motor starters, motor control centres and industrial machinery circuits.

Typical Applications

• Three-phase motor short-circuit protection.
• Motor control centres and motor starter assemblies.
• Industrial machinery and production equipment.
• Pumps, fans and compressor circuits.
• Conveyors and material-handling systems.
• Industrial switchboards and control panels.
• Process-industry electrical systems.
• Circuits using separate coordinated motor overload protection.