1N4004 Rectifier Diode 10-Pack - 1A 400V Axial Silicon Diodes, DO-41 Package for Power Supplies, Polarity Protection, and Flyback Clamping in Arduino DIY Electronics

The DIYKIT 1N4004 Rectifier Diode 10-Pack is an essential assortment of high-quality, general-purpose silicon rectifier diodes designed for electronics hobbyists, makers, and professional engineers alike. Featuring ten individual 1N4004 diodes, this pack ensures you always have the necessary components on hand for power management, circuit protection, and signal conditioning. The 1N4004 is an industry-standard member of the classic 1N400x series, renowned for its dependability, low cost, and robust performance in everyday electronic applications. Whether you are building an AC-to-DC power converter, protecting sensitive microcontroller inputs, or clamping inductive kickback from inductive loads, these diodes provide the reliable performance your projects demand.

Each diode in this 10-pack is constructed using a diffused silicon junction, which offers low forward voltage drop and high current capability. Rated for a maximum continuous forward current of 1.0 Ampere and a peak repetitive reverse voltage of 400 Volts, the 1N4004 strikes an excellent balance between voltage tolerance and current handling. Housed in the standard DO-41 molded plastic package, these diodes feature axial leads that are highly compatible with standard 0.1-inch (2.54mm) pitch solderless breadboards, perfboards, and printed circuit boards (PCBs). The package is designed to withstand high soldering temperatures and features a clearly marked cathode band for quick polar orientation during assembly. With a low reverse leakage current and high surge current capability, these diodes are built to handle transient spikes and demanding operational conditions.

Please note that exact electrical characteristics may vary slightly by manufacturer or module revision; users should check the official datasheet for precise tolerances.

• Diode Type: Silicon Rectifier
• Package Type: DO-41 (Axial Leads)
• Quantity: 10 Pieces
• Maximum Repetitive Peak Reverse Voltage: 400 V
• Maximum RMS Voltage: 280 V
• Maximum DC Blocking Voltage: 400 V
• Maximum Average Forward Rectified Current: 1.0 A (at 75 degrees Celsius)
• Peak Forward Surge Current: 30 A (8.3ms single half sine-wave)
• Maximum Instantaneous Forward Voltage: 1.1 V (at 1.0 A DC)
• Maximum DC Reverse Current: 5.0 uA (at rated DC blocking voltage, 25 degrees Celsius)
• Typical Junction Capacitance: 15 pF (measured at 1.0 MHz)
• Operating and Storage Temperature Range:
• 65 to +175 degrees Celsius

The versatility of the 1N4004 makes it a staple in numerous electronic designs. Key applications include:

1. AC to DC Rectification: Configure four diodes in a bridge rectifier configuration to convert alternating current from step-down transformers into direct current for power supplies.

2. Reverse Polarity Protection: Place a diode in series with the positive power input of your Arduino, ESP32, or Raspberry Pi projects. If a battery or power adapter is connected backward, the diode blocks the current, preventing catastrophic damage to your microcontrollers and sensors.

3. Flyback / Freewheeling Diode: Inductive loads such as DC motors, solenoids, and relay coils generate massive high-voltage spikes when turned off. Placing a 1N4004 in parallel with the load safely clamps these spikes, protecting driving transistors or microcontrollers.

4. Voltage Clamping: Limit signal voltages to safe levels in analog signal processing circuits.

When integrating the 1N4004 diodes into your circuits, correct orientation is critical. The silver or white band printed on the cylindrical body of the diode indicates the cathode (negative terminal), while the unmarked side is the anode (positive terminal). In forward-bias mode, connect the anode to the higher potential and the cathode to the lower potential. Note that there is a typical forward voltage drop of approximately 0.7V to 1.1V across the diode during conduction, which will reduce the output voltage of your power supply slightly; account for this drop in low-voltage designs. For high-current applications approaching the 1.0A limit, ensure adequate lead length or PCB copper traces to dissipate heat, as the diode can become warm during continuous operation. When soldering, avoid overheating the leads; limit soldering iron contact to under 10 seconds.

10 x 1N4004 Silicon Rectifier Diodes (DO-41 Package)