Description

The ABB 5STP26N6500 is a high-power phase control thyristor (PCT) manufactured by ABB Switzerland — Power Semiconductors, originating from the legacy BBC/ASEA thyristor production line. This hockey-puck (press-pack) semiconductor device is designed for demanding industrial rectification, inverter, and power control applications requiring high voltage blocking capability and substantial current handling.

The ABB 5STP26N6500 features a robust ceramic, metal-sealed co-fired package with patented free-floating silicon technology, delivering low on-state and switching losses for optimal power handling efficiency. Its interdigitated amplifying gate design ensures reliable triggering even in challenging electrical environments.

Application Scenarios

At an electrolytic aluminum smelter in China, a 66-pulse rectifier bank experienced frequent phase-arm failures due to thermal stress and voltage transients. Each thyristor failure required a 6-hour production stoppage, costing the facility approximately $85,000 per incident. The engineering team replaced the aging SCRs with the ABB 5STP26N6500, leveraging its 6.5kV blocking voltage and 65kA surge current capability to withstand the demanding electrical conditions. Within the first year of operation, the rectifier bank achieved zero phase-arm failures, and the plant’s maintenance manager credited the ABB 5STP26N6500 with reducing unplanned downtime by 100%, delivering annual savings exceeding $1.5 million.

Whether deployed in HVDC converter stations, large motor drives, electrolytic power supplies, or traction systems, the ABB 5STP26N6500 delivers the reliable, high-power switching performance that mission-critical industrial applications demand.

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