Thyristor Blocks

Thyristor Blocks

Thyristor blocks are used to control single-phase or three-phase electrical loads in industrial and technological processes. They serve as a power actuator device that receives a control signal from a temperature controller, regulator, or another automation device and switches the load accordingly.

Unlike electromechanical relays or contactors, thyristor blocks have no moving contacts. This ensures high switching speed, no mechanical wear, and a long service life even under intensive operation.

What Thyristor Blocks Are Used For

The primary purpose of thyristor blocks is to control electric power and switch loads automatically.

Main tasks:

• control of electric heaters;
• switching of heating elements (TENs);
• power regulation of heating;
• control of drying chambers;
• operation with thermoplastic equipment;
• control of industrial furnaces;
• automation of technological processes;
• contactless load switching;
• operation within PID control systems.

Operating Principle

The thyristor block receives a control signal from a regulator or controller and according to it switches on or off the power supply to the load.

In temperature control systems, thyristor blocks often operate together with PID regulators. The regulator determines the required power level, and the thyristor block provides fast and precise control of the heater without mechanical contact switching.

Depending on the model, control by period skipping or phase power regulation is possible.

Where They Are Applied

Thyristor blocks are used in a wide range of industrial and technological systems.

Main application areas:

• electric furnaces;
• drying chambers;
• heating systems;
• thermoplastic injection molding machines;
• extruders;
• thermoforming equipment;
• ventilation systems with electric heating;
• laboratory equipment;
• food industry;
• woodworking equipment;
• production lines;
• industrial automation systems.

Thyristor blocks are especially effective in processes that require a high number of switching cycles or precise temperature regulation.

Main Advantages of Thyristor Blocks

Contactless control technology offers a number of benefits compared to traditional relay solutions.

Key advantages:

• no mechanical wear;
• high switching speed;
• long service life;
• silent operation;
• high reliability;
• precise power control;
• compatibility with PID regulators;
• minimal maintenance;
• stable operation under industrial conditions.

Thanks to these properties, thyristor blocks are widely used in modern heating process automation systems.

Control Signals

Thyristor blocks can operate with various types of control signals:

• discrete signal;
• logical control signal;
• signal from PID regulator;
• pulse signal;
• signal from controller;
• output of temperature regulator.

This allows their integration into almost any automation system.

How to Choose a Thyristor Block

When choosing, consider:

• type of load;
• supply voltage;
• operating current;
• single-phase or three-phase design;
• control method;
• type of control signal;
• regulation mode;
• cooling conditions;
• mounting method;
• operating conditions;
• compatibility with regulator or controller.

For heating systems, it is important to select the block rated for current with the necessary power margin and ensure proper cooling of power components.

Use with Temperature Controllers

Thyristor blocks are often used together with REGMIK temperature controllers. This solution enables precise PID control and smooth management of heating elements without mechanical contact wear.

Such configuration is especially effective for:

• drying chambers;
• industrial furnaces;
• thermoplastic injection molding machines;
• heating cabinets;
• extruders;
• technological heating systems.

Buy REGMIK Thyristor Blocks

Our catalog features REGMIK thyristor blocks for controlling TENs, heaters, drying chambers, industrial furnaces, and other technological equipment. Available solutions for single-phase and three-phase loads with high reliability and long service life.

Our specialists will help you select a thyristor block according to load power, control type, and operating conditions.