Table of Contents
Introduction
The 2N7000 is an N-channel MOSFET widely used in low-power switching applications. It is known for its low on-resistance, high-speed operation, and ease of use in digital and analog circuits. This MOSFET is commonly found in battery-operated systems, switching regulators, and logic-level applications.
2N7000 Pinout
The 2N7000 comes in a TO-92 package and has three terminals:
- Source (S) – Pin 1: Connected to the ground or the lower potential side.
- Gate (G) – Pin 2: Controls the MOSFET switching (typically driven by logic signals).
- Drain (D) – Pin 3: Connected to the load.
2N7000 Specifications
Below are the key electrical and physical characteristics of the 2N7000:
- Type: N-Channel MOSFET
- Drain-Source Voltage (Vds): 60V
- Gate-Source Voltage (Vgs): ±20V max
- Drain Current (Id): 200mA continuous
- Power Dissipation (Pmax): 400mW
- On-Resistance (Rds(on)): ~1.8Ω at Vgs = 10V
- Threshold Voltage (Vgs(th)): 0.8V to 3V
- Switching Speed: Fast (rise time ~10ns, fall time ~10ns)
- Package Type: TO-92
Applications
Due to its versatility, the 2N7000 is used in various electronic circuits, including:
- Logic Level Switching: Used for switching loads with logic signals (e.g., microcontrollers and Arduino projects).
- Relay Drivers: Controls relays in low-power applications.
- Motor Control: Small DC motor switching in embedded systems.
- LED Driving: Used in low-power LED circuits.
- Signal Amplification: Functions as an amplifier in certain applications.
- Battery-Powered Systems: Ideal for low-power electronic devices.
Alternative MOSFETs
If the 2N7000 is unavailable or a different specification is needed, some alternatives include:
- BS170: Similar specifications, often used as a direct replacement.
- IRLZ34N: A logic-level MOSFET for higher current applications.
- 2N7002: SMD version of the 2N7000 for compact designs.
- BSS138: Another low-power N-channel MOSFET with a lower voltage rating.
Conclusion
The 2N7000 MOSFET is an excellent choice for low-power switching applications due to its simplicity, low cost, and ease of integration with logic circuits. Whether used for LED control, relay driving, or small motor switching, it remains a reliable option in electronics design..
