This post explains for the diode.
The Part Number is MBR30H100CTG, MBRF30H100CTG
The Marking : B30H100G
The function of this semiconductor is Switch-mode Power Rectifier.
The package is TO-220 Type
Manufacturer: ON Semiconductor
Preview images :
1 page
Description
This is 100V, 30A, Switch‐mode Power Rectifier.
Features and Benefits :
1. Low Forward Voltage: 0.67 V @ 125°C
2. Low Power Loss/High Efficiency
3. High Surge Capacity
4. 175°C Operating Junction Temperature
5. 30 A Total (15 A Per Diode Leg)
6. These are Pb−Free Devices
Applications:
1. Power Supply – Output Rectification
2. Power Management
3. Instrumentation […]
