Kubota STP-330-145 Recirculating Chiller Controller 220V 3-Phase For Parts

Kubota STP-330-145 Recirculating Chiller Controller 220V 3-Phase For Parts

The Kubota STP-330-145 is a self-contained recirculating chiller temperature controller manufactured by Kubota KCT Corporation of Tokyo, Japan. It integrates a PT100-based temperature control system with a Mitsubishi PLC, solid state contactor, and a 50A main circuit breaker into a single freestanding cabinet. This unit was previously installed in a CD/DVD/Blu-Ray disc manufacturing facility, where recirculating chillers are used to maintain precise coolant temperatures for disc molding and coating processes. It is being sold as-is for parts or repair due to cracked pressure gauges found during inspection.

Specifications & What's Included

• Manufacturer: Kubota KCT Corporation, Tokyo — Made in Japan
• Model: STP-330-145 (also listed as STP330)
• Power Input: 220V AC, 3-Phase, 60Hz
• Temperature Controller: Kubota TIC(C), Model 00A07001
• Temperature Range: 0.0 – 130.0°C
• Temperature Sensor Type: PT100
• TIC(C) Supply: 100–240V AC, 50/60Hz; 6VA (100V) / 9VA (240V)
• Ambient Temperature Limit: 50°C max (per TIC label)
• Main Circuit Breaker: Fuji Electric DG53A, Part No. ED3BEB-050B, 50A
• Solid State Contactor: Mitsubishi US-K40SS
• PLC / Logic Controller: Mitsubishi Melsec F1-20MR
• Control Board: Kubota STP-2 printed circuit board
• Pressure Gauges: Two Yamamoto Keiki gauges (Discharge and Supply), rated to 1.6 MPa — both glass faces cracked
• Front Panel Controls: OPERATE indicators (Full, Pump, Cool, Heat), ALARM indicators (Temp H, Temp L, W Low, TA Heat, PU KW), PURGE button, STOP/START buttons, ALM RST, COOL RUN, POWER indicator
• Power Connector: Red 3-phase industrial plug with attached power cable (rear)
• Form Factor: Freestanding cabinet
• Origin: Used in a CD/DVD/Blu-Ray disc manufacturing plant

Applications

Recirculating chiller temperature controllers like the Kubota STP-330-145 are used in precision manufacturing environments where consistent coolant temperature is critical to process quality. In optical disc (CD/DVD/Blu-Ray) manufacturing, chillers regulate the temperature of injection molding machines, stampers, and coating equipment, where thermal stability directly affects disc geometry and yield. Similar systems are also found in semiconductor fabrication, laser cooling, chemical processing, and other industrial processes requiring closed-loop liquid temperature control. The unit's PT100 sensor input, Mitsubishi PLC logic, and solid state contactor combination is characteristic of Japanese-made industrial temperature control systems from the 1990s through the 2000s era, designed for factory integration with 3-phase power infrastructure.