| No | Part number | Description ( Function ) | Manufacturers | |
| 4 | TVR14751 | (TVR Series) Zinc Oxide Varistor TVR-SERIES Part Number Code TVR-SERIES Part Number Code 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 TVR Product Code Thinking Varistor Resistance Disc 05 07 10 14 20 25 32 40 60 34 Ø Size 5Ø 7Ø 10Ø 14Ø 20Ø 25Ø 32Ø 40Ø 60Ø 34x34 Part No. (VlmA) 180 18x100V 241 24x101V 102 10x102V : : The Tolerance of VlmA K ±10% A 0~+10% B 0~-10% : : Serial Number Special Spec. Co |
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| 3 | TVR14751 | (TVR Series) Zinc Oxide Varistor TVR-SERIES Part Number Code TVR-SERIES Part Number Code 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 TVR Product Code Thinking Varistor Resistance Disc 05 07 10 14 20 25 32 40 60 34 Ø Size 5Ø 7Ø 10Ø 14Ø 20Ø 25Ø 32Ø 40Ø 60Ø 34x34 Part No. (VlmA) 180 18x100V 241 24x101V 102 10x102V : : The Tolerance of VlmA K ±10% A 0~+10% B 0~-10% : : Serial Number Special Spec. Co |
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| 2 | TVR14751-D | Metal Oxide Varistor Metal Oxide Varistor：TVR-D Series Disc Type Varistor for Surge Protection (High Surge Series) Features RoHS compliant Halogen-free series are available Body size: Ф7mm ~ Ф 20mm Wide operating voltage range: 115Vac ~ 680Vac High surge current rating up to 13KA High energy rating up to 720 Joule Operating temperature range: -40°C ~ +85°C Storage temperature range: -40° |
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| 1 | TVR14751-V | Metal Oxide Varistor Metal Oxide Varistor：TVR-V Series Disc Type Varistor for Surge Protection (Medium Surge Series) Features 1. Ro HS compliant 2. Halogen-free series are available 3. Body size: Ф10 and Ф14 mm 4. Wide operating voltage range: 130Vac ~ 680Vac 5. Operating temperature range: -40°C ~ +85°C Storage temperature range：-40°C ~ +125°C 6. Agency recognition: UL 1449 3rd/cUL/V |
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List of most widely used semiconductors
| Part Number | Function | Manufacturers | |
| 1N4007 | The 1N4007 is a rectification diode that is designed for high-voltage applications, typically up to 1000V. It has a maximum current rating of 1A and a forward voltage drop of around 0.7V. |
 Vishay |
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| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
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6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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