1N4006 Rectifier Diode - 1A 800V Silicon Rectifying Diodes, DO-41 Axial Package for Power Supply Rectification, Reverse Polarity Protection, and Inductive Flyback Clamping

The DIYKIT 1N4006 is a highly reliable, general-purpose silicon rectifier diode belonging to the industry-standard 1N400x family. Designed for versatility and durability, this axial-lead diode is rated for a continuous forward current of 1.0 Ampere and an impressive peak repetitive reverse voltage of 800 Volts. While lower-numbered members of the family like the 1N4001 are limited to low-voltage rails, the 1N4006 provides substantial voltage headroom, making it an indispensable component for mains-side rectification, high-voltage DC power supplies, and robust inductive spike suppression. Whether you are building a custom power supply on a printed circuit board (PCB), prototyping on a breadboard, or repairing consumer electronics, the 1N4006 is a fundamental drawer essential that delivers consistent performance under demanding electrical conditions.

At its core, the 1N4006 utilizes a diffusion-type silicon PN junction housed in a rugged, molded plastic DO-41 (also known as DO-204AL) package. This package features high-temperature soldering guaranteed to 260 degrees Celsius for 10 seconds at 0.375-inch lead length, preventing thermal damage during assembly. The diode exhibits a low forward voltage drop of typically 1.1 Volts when operating at its full rated current of 1.0 Amp, which minimizes power dissipation and localized heating. It is classified as a standard recovery diode, optimized for low-frequency applications such as 50Hz to 60Hz AC mains rectification. Because of its standard recovery characteristics, it is not recommended for high-frequency switching power supplies (SMPS) operating in the tens of kilohertz range, where fast-recovery or Schottky diodes are preferred. However, for general-purpose DC blocking, reverse-polarity protection, and low-frequency rectification, its high reverse voltage capability of 800V ensures that transient spikes and line surges will not easily puncture the junction.

• Peak Repetitive Reverse Voltage (Vrrm): 800 V
• Maximum RMS Voltage (Vrms): 560 V
• Maximum DC Blocking Voltage (Vdc): 800 V
• Maximum Average Forward Rectified Current (Io): 1.0 A (at Ta = 75 degrees Celsius)
• Peak Forward Surge Current (Ifsm): 30 A (8.3ms single half sine-wave superimposed on rated load)
• Maximum Instantaneous Forward Voltage Drop (Vf): 1.1 V at 1.0 A DC
• Maximum DC Reverse Current (Ir): 5.0 uA at rated DC blocking voltage (Ta = 25 degrees Celsius), 50 uA (Ta = 100 degrees Celsius)
• Typical Junction Capacitance (Cj): 15 pF (measured at 1.0 MHz and applied reverse voltage of 4.0 V)
• Operating Junction and Storage Temperature Range:
• 65 to +175 degrees Celsius
• Package Type: DO-41 (Axial Lead, Plastic Case)
• Lead Finish: Matte Tin Plated Leads, Solderable per MIL-STD-202 Method 208

The 1N4006 is widely used across a broad spectrum of electronic designs. Its primary application is in AC-to-DC power rectification, where it can be configured as a single half-wave rectifier or in a four-diode bridge configuration for full-wave rectification. It is also highly valued as a reverse-polarity protection diode; when placed in series with a DC power input, it prevents current from flowing if the power source is connected backward, safeguarding sensitive downstream microcontrollers, sensors, and ICs. Additionally, it serves as an excellent freewheeling or flyback diode. When inductive loads such as relays, solenoids, DC motors, or stepper motors are switched off, they generate high-voltage back-EMF spikes that can destroy control transistors. Placing a 1N4006 in parallel with the inductive load (biased in reverse) provides a safe path for this energy to dissipate, protecting your control circuitry.

When integrating the 1N4006 into your projects, pay close attention to physical installation. The cathode of the diode is clearly marked by a painted band on the plastic body; current flows from the anode (unmarked side) to the cathode (marked side). When bending the axial leads for through-hole mounting, avoid applying excessive stress directly at the body-lead interface, as this can crack the internal glass passivation layer and cause device failure. It is recommended to support the lead with pliers while bending. For optimal thermal performance, keep the lead lengths as short as practical when soldering to a PCB, as the copper traces act as effective heatsinks to draw heat away from the silicon junction. If hand-soldering, use a standard 35W to 60W soldering iron and complete the joint within 3 seconds to prevent thermal stress.

1 x DIYKIT 1N4006 Rectifier Diode