TIP35C NPN Power Transistor (100V-25A )

⚡ TIP35C – NPN Power Transistor

(High-power, high-current BJT in TO-247 package)

📌 General Description

The TIP35C is a silicon NPN power transistor designed for high power switching and amplification applications. It can handle up to 25A continuous collector current and up to 100V collector-emitter voltage. It’s robust, reliable, and widely used in motor control, audio amplification, and power supply designs.

⚙️ Key Specifications

Parameter Value Type NPN Power BJT VCEO (Collector-Emitter Voltage) 100V VCBO (Collector-Base Voltage) 100V IC (Collector Current) 25A continuous ICM (Peak Collector Current) 40A VBE(on) (Base-Emitter On Voltage) ~2V PD (Power Dissipation) 125W (with heatsink) hFE (DC Gain @ 4A, 4V CE) 15 – 75 Transition Frequency (fT) 3 MHz Junction Temp (Tj) –65°C to +150°C Package Type TO-247 (TO-218 compatible) 📦 Package Pinout – TO-247 (3-Pin)

      _____
     |     |
 B —| 1   |— C (Tab)
 E —| 3   |
     |_____|

1 – Base  
2 – Collector (also the metal tab)  
3 – Emitter  

🧪 Typical Applications

• High-current switching
• DC motor drivers
• Inverter and UPS systems
• Linear or Class AB audio amplifiers
• Power supplies and regulators
• Battery chargers

🔧 Features

• Rugged and thermally stable
• Can be paralleled for higher current
• Easy to drive (like standard BJT)
• Available with complementary PNP (TIP36C)

✅ Advantages

• High current and voltage capacity
• Excellent for linear and switching modes
• TO-247 package allows efficient cooling
• Widely available and cost-effective

⚠️ Design Tips

• Requires a heatsink for high power use (≥10A)
• Use a base resistor to limit base current and protect the driver
• Add flyback diode when switching inductive loads
• Consider Darlington pair setup for higher current gain