1N4007 Diode Specs

1N4007 Diode Specs
••• Stockbyte/Stockbyte/Getty Images

A rectifier diode is used as a one-way check valve. Since these diodes only allow electrical current to flow in one direction, they are used to convert AC power into DC power. When constructing a rectifier, it is important to choose the correct diode for the job; otherwise, the circuit may become damaged. Luckily, a 1N4007 diode is electrically compatible with other rectifier diodes, and can be used as a replacement for any diode in the 1N400x family.

Reverse Voltage Rating

A diode allows electrical current to flow in one direction -- from the anode to the cathode. Therefore, the voltage at the anode must be higher than at the cathode for a diode to conduct electrical current.

In theory, when the voltage at the cathode is greater than the anode voltage, the diode will not conduct electrical current. In practice, however, the diode conducts a small current under these circumstances. If the voltage differential becomes great enough, the current across the diode will increase and the diode will break down.

Some diodes -- such as the 1N4001 -- will break down at 50 volts or less. The 1N4007, however, can sustain a peak repetitive reverse voltage of 1000 volts.

Forward Current

When the voltage at the anode is higher than the cathode voltage, the diode is said to be "forward-biased," since the electrical current is "moving forward." The maximum amount of current that the diode can consistently conduct in a forward-biased state is 1 ampere.

The maximum that the diode can conduct at once is 30 amperes. However; if the diode is required to conduct that much current at once, the diode will fail in approximately 8.3 milliseconds.

Forward Voltage and Power Dissipation

When the maximum allowable consistent current amount is flowing through the diode, the voltage differential between the anode and the cathode is 1.1 volts. Under these conditions, a 1N4007 diode will dissipate 3 watts of power (about half of which is waste heat).

Related Articles

How to Read Zener Diode Ratings
What Are the Functions of a Zener Diode?
What Is the Function of a Voltage Regulator?
How to Convert a 9V Battery to 3.3V DC
What Is a Flyback Diode?
How to Wire LEDs for 12V
What Is Ohm's Law & What Does It Tell Us?
How to Use a Variac
How to Measure VDC
What Is the Difference Between AC & DC Welding?
How to Regulate DC Power With Resistors
How Does the Condenser in a Fluorescent Lamp Work?
DC Vs. AC Voltage
How to Test a Diode Rectifier
Difference Between Digital Inverter & Sine Wave Inverter
What Causes Reverse Polarity in AC?
How to Use a 9-Volt Battery to Power LEDs
How to Calculate Voltages in Transistors
How to Use a Treadmill Motor for a Wind Generator