Insulated Gate Bipolar Transistor Silicon N Channel IGBT High Power Switching Applications Motor Control Applications The GT25J101 is a turbocharger manufactured by TOS (Turbocharger Osaka Sangyo).  

**Specifications:**  
- **Manufacturer:** TOS (Turbocharger Osaka Sangyo)  
- **Model:** GT25J101  
- **Compressor Wheel Diameter:** 51mm (inducer) / 76mm (exducer)  
- **Turbine Wheel Diameter:** 53mm (inducer) / 47mm (exducer)  
- **A/R Ratio:** 0.64 (compressor side) / 0.86 (turbine side)  
- **Bearing Type:** Journal bearing  
- **Maximum Boost Pressure:** ~1.2 bar (~17.4 psi)  
- **Typical Applications:** Used in various Japanese performance vehicles, including some Nissan SR20DET engines.  

This turbocharger is known for its quick spool-up and mid-range power delivery.