Diode module for coil surge protection 110/220VAC LA4DA2U

Contactor coil protection – surge suppression module LA4DA2U

This surge protection module, designed for TeSys Deca contactors, is a key element ensuring the reliability and durability of electrical installations. Its use limits transient voltage, protecting contactor coils from damage caused by back induction during switching. The LA4DA2U module is compatible with a wide range of LC1D80-D150 (3P) and LC1D40-D115 (4P) contactors, making it a universal solution for many applications.

Construction and mounting

The module is characterized by simple mounting – it only needs to be screwed onto the top of the contactor. This ensures a stable connection and easy installation for both professionals and people with basic electrical knowledge. The compact dimensions of the module do not affect the overall size of the contactor, making it easier to integrate into existing switchboards and control cabinets. It utilizes RC (resistor-capacitor) technology to suppress surges, which is a proven and effective solution in such applications.

Application and benefits

The LA4DA2U module is used wherever protection of contactor coils from the negative effects of surges is required. It is particularly recommended for applications exposed to frequent switching, such as motor control systems, pumps or fans. Using this module translates to:

• Increased contactor lifespan: Limiting surges reduces the thermal load on the coils, which extends their life and minimizes the risk of failure.
• Improved installation reliability: Surge protection prevents unplanned downtime of devices and systems.
• Compliance with safety standards: The module meets the requirements of IEC 60947-5-1, EN 60947-5-1, UL 60947-5-1 and CSA C22.2 No 60947-5-1 standards, ensuring safe use.
• Sustainable development: The product is compliant with RoHS and REACH directives (Green Premium), confirming its environmental friendliness.
• Wide voltage range: The module works with control circuits with a voltage of 110…240 V AC at a frequency of 50/60 Hz, ensuring its versatility.
• Easy identification: The lack of an LED indicator does not affect the functionality of the device – its task is to discreetly protect the contactor coil.