1SDA054940R1 ABB KLF-S T4-T5 Key Lock Equal No. 20005 for Front/Rotary Handle

Why Choose the ABB 1SDA054940R1 KLF-S Key Lock?

The ABB 1SDA054940R1 is a KLF-S key lock accessory designed for compatible ABB SACE Tmax T4 and T5 moulded case circuit breakers. It provides a keyed mechanical locking function for the circuit breaker front operating mechanism or rotary handle, supporting controlled operation in electrical distribution installations.

This KLF-S version uses equal key number 20005, allowing multiple compatible circuit breakers equipped with the corresponding KLF-S lock to be operated using the same key. The lock is intended to secure the operating mechanism in the open position, making it useful where controlled access and coordinated locking arrangements are required.

Designed specifically for Tmax T4 and T5 circuit breakers, the 1SDA054940R1 can be applied to the front operating mechanism or rotary handle operating mechanism. It provides a genuine ABB locking solution for switchboards, industrial distribution panels and installations requiring controlled breaker operation.

Key Advantages

• Provides key-operated mechanical locking for compatible Tmax circuit breakers.
• Designed for ABB SACE Tmax T4 and T5 circuit breakers.
• Uses equal key number 20005 for common-key locking arrangements.
• Locks the compatible operating mechanism in the open position.
• Suitable for both front and rotary handle operating mechanisms.
• Genuine ABB accessory engineered for coordinated integration with the Tmax T platform.

Key Features

• ABB SACE Tmax T accessory.
• KLF-S key lock configuration.
• Equal key number: 20005.
• Designed for common-key use between multiple compatible circuit breakers.
• Provides locking in the open position.
• Suitable for front operating mechanisms.
• Suitable for rotary handle operating mechanisms.
• Compatible with Tmax T4 and T5 moulded case circuit breakers.

Controlled Circuit Breaker Locking with a Common Key

A circuit breaker key lock provides a mechanical means of restricting operation of the breaker. The ABB KLF-S system is designed to hold the compatible Tmax operating mechanism in the open position, helping prevent unauthorised or unintended operation until the appropriate key is used.

The ABB 1SDA054940R1 uses key number 20005 and belongs to the KLF-S same-key family. Multiple compatible Tmax T4 and T5 circuit breakers fitted with matching number 20005 locks can therefore form a common-key arrangement, supporting practical access control across switchboards containing several breakers.

Typical Applications

• Key locking of ABB Tmax T4 and T5 circuit breakers in the open position.
• Common-key locking arrangements across multiple circuit breakers.
• Front-operated circuit breaker installations.
• Rotary handle operated circuit breaker installations.
• Industrial switchboards and electrical distribution panels.
• Commercial and infrastructure power distribution assemblies.