Difference Between Stud-Type and Capsule-Type Phase-Controlled Thyristors (PCT)

Packaging Form:
Stud-type thyristors use a threaded stud design, with a threaded base that can be directly mounted onto a heat sink.

Heat Dissipation:
Heat is dissipated through the stud in direct contact with the heat sink. It offers good heat dissipation but is limited compared to Capsule-type, making it suitable for medium to high power applications.

Electrical Connection:
Typically connected via threaded mounting, which is simple to install and provides high mechanical strength.

Application Scenarios:
Commonly used in medium to high power industrial equipment, such as motor control, rectifiers, and heating devices.

Features:

• Compact structure and easy installation.
  
• Suitable for scenarios requiring moderate heat dissipation.
  
• Power range is generally lower than Capsule-type.

Packaging Form:
Capsule-type thyristors use a flat, round or disc-shaped design without threads, requiring clamping devices for installation.

Heat Dissipation:
Heat is dissipated from both the top and bottom surfaces (double-sided heat dissipation), providing superior heat dissipation performance, suitable for ultra-high power applications.

Electrical Connection:
Requires clamping devices for both electrical connection and mechanical fixation, with precise clamping force needed during installation.

Application Scenarios:
Commonly used in ultra-high power industrial applications, such as high-voltage direct current (HVDC) transmission, large motor drives, and induction heating equipment.

Features:

• Double-sided heat dissipation for higher efficiency.
  
• Suitable for extremely high power and current scenarios.
  
• More complex installation requiring professional clamping devices.