2pcs C3200 2sC3200 transistor

🔹 2PCS C3200 (2SC3200) – NPN High-Frequency Silicon Transistor

A general-purpose, high-frequency NPN bipolar junction transistor (BJT) in a compact TO-92 package. Designed for low-power amplification and switching applications in audio, RF, and signal processing circuits up to VHF frequencies. Often used as a small-signal amplifier or driver stage.

✅ Specifications:

• Part Number: C3200 or 2SC3200

• Type: NPN Bipolar Junction Transistor (BJT)

• Collector-Emitter Voltage (Vceo): 30V

• Collector-Base Voltage (Vcbo): 50V

• Emitter-Base Voltage (Vebo): 5V

• Continuous Collector Current (Ic): 100mA (Max)

• DC Current Gain (hFE): 70 – 240 (Typical range, varies by batch)

• Power Dissipation (Pc): 300mW (at 25°C ambient)

• Transition Frequency (fT): 200 MHz (Typical) – Suitable for RF/VHF applications

• Package: TO-92 (Through-Hole, Plastic)

• Pinout (TO-92, flat side facing you, leads down):

  1. Emitter (E)

  2. Collector (C)

  3. Base (B)
     Always verify with a multimeter as some manufacturers may use a different pinout.

• Quantity: 2 pieces

⚙️ Key Features:

• High Frequency Capability: The 200MHz fT makes it suitable for RF amplifiers, oscillators, and preamplifier stages.

• Low Noise: Can be used in low-noise amplifier (LNA) stages for sensitive receivers.

• General-Purpose Utility: A versatile transistor for a wide range of low-power analog and digital switching circuits.

• TO-92 Package: Easy to use on breadboards, perfboards, and PCBs for prototyping and production.

• High Gain: Offers good current amplification for its size and power class.

📦 Typical Applications:

• RF & VHF Circuits: Local oscillators, mixer stages, and RF amplifiers in radio receivers and transmitters.

• Audio Preamplifiers: Small-signal voltage amplification in microphone preamps, guitar pedals, and audio mixers.

• Low-Power Switching: Driving small relays, LEDs, or other transistors from microcontroller GPIO pins (with a base resistor).

• Signal Buffering & Impedance Matching: Isolating stages in analog signal chains.

• Educational & Hobbyist Projects: Learning transistor fundamentals, building simple amplifiers, and oscillator circuits.

🔧 Basic Usage as a Switch (with Arduino/MCU):

1. Circuit: Connect the Collector to your load (e.g., an LED with a series resistor), and the load to Vcc (e.g., 5V). Connect the Emitter to GND. Connect the Base to your MCU’s GPIO pin through a current-limiting resistor (e.g., 1kΩ – 10kΩ).

2. Calculation: Base resistor RB≈(VGPIO−0.7V)/(IC/hFE)RB​≈(VGPIO​−0.7V)/(IC​/hFE​). For a 5V GPIO, 20mA load, and hFE=100: $(5-0.7)/(0.02/100)\approx 21.5k\Omega$. A 10kΩ resistor is a safe, common choice.

3. Code: Set the GPIO pin HIGH to turn the transistor ON (saturating it), allowing current to flow through the load.

⚠️ Important Design Notes & Limitations:

• Low Current: Maximum 100mA collector current. Not for power switching. For higher currents, use a MOSFET or a power transistor (e.g., TIP31, 2N3055).

• Heat Dissipation: The TO-92 package can only dissipate ~300mW. Ensure VCE×IC<300mWVCE​×IC​<300mW for reliable operation. Use a heatsink if necessary.

• Static Sensitive: Handle with care to avoid ESD damage.

• Verification: Always verify pinout with a multimeter in diode-test mode before soldering.

• Biasing: For linear (amplifier) use, proper DC biasing of the base is required to set the operating point (Q-point).