Allen-Bradley N990CH16A8S9339 Thyristor Module

Allen-Bradley N990CH16A8S9339 Thyristor Module is a high-power press-pack phase-control thyristor (SCR) designed for industrial power control and rectification, handling large AC and DC loads in motor drives, soft starters, DC power supplies, induction heating equipment, welding machines, and industrial rectifier systems. It delivers an average on-state current of 2500 A and repetitive peak off-state and reverse voltages of 1600 V, supports line-frequency operation up to 500 Hz, and is compatible with air- or water-cooled heatsink cooling. The unit comes in a W12 press-pack housing, measures 102 mm × 63 mm × 34 mm, weighs roughly 1.0 kg, and requires a clamping force of 27 to 34 kN for installation; its maximum junction temperature is 125°C and the junction-to-case thermal resistance is 0.017 K/W. In maintenance contexts, it is used for repair and replacement of SCR devices in heavy industrial equipment and aligns with original Westcode / IXYS UK Westcode / Littelfuse legacy series, with an equivalent part number N2500VC160 and common replacements including IXYS Westcode N2500VC160, AS Energi ATDN2500VC160, and Littelfuse N2500VC160.