The 1N4007 is the most widely used power rectifier diode in the world of electronics. It belongs to the 1N400x series and is the “ultimate” version in that family, capable of handling a peak repetitive reverse voltage of up to 1000V. It is primarily used for rectification, converting alternating current (AC) to direct current (DC) in power supplies. Due to its high voltage rating and 1A current capacity, it is also a popular choice for “flyback” protection, where it is placed across inductive loads like relays and motors to prevent voltage spikes from damaging sensitive control circuitry.
1N4007 Pinout (DO-41)
The 1N4007 is housed in a molded plastic axial package. The polarity is indicated by a silver band.
| Pin | Terminal | Description |
| 1 | Cathode | The negative terminal (marked with a silver band) |
| 2 | Anode | The positive terminal |
Technical Specifications – maximum
- Peak Repetitive Reverse Voltage (VRRM): 1000V
- Average Forward Rectified Current (IO): 1.0A
- Non-Repetitive Peak Forward Surge Current (IFSM): 30A
- Forward Voltage Drop (VF): 1.1V
- Reverse Current (IR): 5µA
- Operating Junction Temperature: -65°C to +175°C
Key Features & Benefits
- High Voltage Tolerance: Can safely handle up to 1000V, making it versatile for both low and high voltage AC mains projects.
- Durability: High surge current capability allows it to withstand temporary spikes without failing.
- Low Cost: Extremely affordable and widely available globally.
- Standard Footprint: The DO-41 package fits perfectly in breadboards and standard PCB hole spacings.
Common Applications
- AC to DC Rectification: Used in bridge rectifiers for wall adapters and power supplies.
- Flyback Protection: Placed across relay coils to suppress inductive voltage spikes.
- Reverse Polarity Protection: Prevents damage if a battery or power supply is connected incorrectly.
- Voltage Clamping: Limiting voltage levels in power management circuits.
1N4007 Equivalent & Substitutes
- 1N4001 to 1N4006 (Lower voltage versions of the same series)
- UF4007 (Ultra-fast version for high-frequency switching)
- 1N5408 (3A version for higher current requirements)
- M7 (Surface mount SMD equivalent)
Related Tutorials on ElxHub
- Basics: Diodes – Basics, Types, and Working
- Protection: How to Protect Your Circuit from Reverse Polarity – Coming Soon
- Selection Guide: Ultimate Diode Selection Guide
Conclusion
The 1N4007 is a “must-have” component for any electronics inventory. Its ability to handle high voltages while remaining compact and inexpensive makes it the primary choice for power rectification and circuit protection. Whether you are building a simple battery charger or a complex industrial controller, the 1N4007 provides the robust reliability needed for power-related tasks.
Download the Diode Datasheet pdf:
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