1N4001 Rectifier Diode
A general-purpose 1A rectifier diode — the standard choice for converting AC to pulsating DC or blocking reverse power.
How this component works
A diode conducts current in the forward direction once the voltage across it exceeds its forward voltage drop (roughly 0.7V for silicon, 0.2-0.3V for Schottky), and blocks current in the reverse direction.
This one-way behavior is used to protect circuits from reversed power connections, to convert AC to pulsating DC (rectification), and to clamp voltage spikes from inductive loads like relay coils and motors.
CircuitForge models a diode's I-V curve with the standard exponential diode equation, using the forward voltage, saturation current (Is), and ideality factor (n) as the tunable parameters.
Common Use Cases
- Half-wave or full-wave (bridge) rectification of an AC input
- Reverse-polarity protection in series with a battery input
- Flyback/freewheeling diode across a relay or motor coil
Frequently Asked Questions
What's the difference between 1N4001 and 1N4007?
They're electrically almost identical except for reverse voltage rating — 1N4001 handles 50V reverse, 1N4007 handles 1000V. Both carry the same 1A forward current.
Why does it need a higher forward voltage than a 1N4148?
It's built for higher current handling, which comes with more internal series resistance and a higher voltage drop at the currents it's rated for — the tradeoff for its 5x higher current capacity.