Allen-Bradley N990CH16A8S9339 Thyristor Module

Description:

The N990CH16 A8S 9339 Thyristor Module is a high-power semiconductor switching device used in industrial power control and conversion systems to regulate large AC and DC electrical loads. Commonly installed in motor drives, soft starters, DC power supplies, induction heating equipment, welding machines, and industrial rectifier systems requiring precise phase control and high current handling capability. Maintenance teams and power electronics technicians use this module for equipment repairs, drive restoration, and replacement of failed SCR devices in heavy industrial applications. The N990CH16 is a press-pack phase control thyristor designed for high-power switching applications.

Applications:

The N990CH16 thyristor module is commonly used in DC motor controls, variable speed drives, industrial rectifiers, power supplies, induction heating systems, mining equipment, and welding equipment where high-current phase angle control is required. The N990CH16 thyristor is designed for line frequency applications up to 500 Hz and is widely used in heavy-duty industrial power conversion equipment.

Technical Specifications:

• Manufacturer part number (MPN): N990CH16
• Marking code: A8S 9339
• Product type: Phase control thyristor module (SCR)
• Device type: Press-pack thyristor
• Semiconductor type: Silicon Controlled Rectifier (SCR)
• Average on-state current: 2500 A
• Repetitive peak off-state voltage: 1600 V
• Repetitive peak reverse voltage: 1600 V
• Surge current rating: 37,000 A
• Package style: W12 press-pack housing
• Housing dimensions: 102 mm × 63 mm × 34 mm
• Mounting type: Clamped press-pack installation
• Maximum junction temperature: 125°C
• Thermal resistance junction-to-case: 0.017 K/W
• Clamping force requirement: 27 to 34 kN
• Device weight: Approximately 1.0 kg (2.2 lb)
• Frequency capability: Up to 500 Hz line frequency applications
• Cooling method: Air or water-cooled heatsink systems
• Application: Industrial power control and rectification
• Service application: Repair and replacement component
• Equivalent part number: N2500VC160
• Original manufacturer: Westcode / IXYS UK Westcode / Littelfuse legacy series.

Common Replacements:

• IXYS Westcode N2500VC160
• AS Energi ATDN2500VC160
• Littelfuse N2500VC160 Press-Pack SCR