What is the R3968FC28N Thyristor? The R3968FC28N is a distributed gate thyristor designed for ultra-high power control in demanding applications. With its advanced gate structure, it delivers: Superior switching performance Excellent thermal stability High voltage handling capacity Robust surge current capability This makes it ideal for heavy-duty industries such as HVDC transmission, industrial drives, electrolysis plants, and power converters. Key Features of R3968FC28N High Surge Current Capability – Withstands extreme surges without performance degradation. Distributed Gate Design – Optimized gate triggering for reliable and uniform turn-on. High Voltage Blocking – Suitable for 2.8 kV+ class systems. Thermal Stability – Maintains efficiency across wide temperature ranges. Enhanced Durability – Long service life in challenging environments. Frequently Asked Questions (FAQ) Q1. What is the blocking voltage of R3968FC28N? It is rated for ~2800 V repetitive peak reverse voltage (VRRM). Q2. What cooling method is recommended? Capsule thyristors perform best with double-sided cooling to achieve maximum current ratings. Q3. Is it suitable for HVDC systems? Yes. With its high surge and voltage capability, it is widely used in HVDC and power transmission. Q4. Can I replace Westcode/ABB parts with this? Yes, equivalents are available. Always confirm mechanical dimensions and clamp force before substitution.