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1N4007 Pinout

Anode (A) - positive terminal; Cathode (K) - negative terminal marked by a painted band. Current conducts from anode to cathode, blocking in reverse.

Specifications

Parameter	Value
Part Number	1N4007
Type	General-Purpose Rectifier Diode
Package	DO-41 (Axial)
Max Repetitive Peak Reverse Voltage (VRRM)	1000 V
Average Forward Rectified Current (IF(AV))	1 A
Peak Surge Current (IFSM, 8.3 ms)	30 A
Forward Voltage (VF @ 1 A)	≈ 1.1 V
Typical Reverse Recovery Time (trr)	~2 µs (slow recovery)
Operating Junction Temperature	−55 °C to +150 °C
Polarity Marking	Cathode band
Mounting	Through-hole

Tip: For high-frequency rectification (SMPS), use fast/ultrafast diodes like UF4007 or Schottky types.

Working Principle

The 1N4007 is a PN junction that allows current in one direction only. Under forward bias, it conducts with ~0.7–1.1 V drop. Under reverse bias, it blocks current until breakdown near its VRRM (1000 V). This one-way behavior enables efficient AC-to-DC rectification.

Circuit Symbol

 ----|>|----
   A      K

Key Features

High reverse voltage-handles up to 1000 V.
1 A average current with strong surge tolerance (30 A).
Low leakage for stable DC outputs.
Rugged, inexpensive, widely available.

1N4007 vs Other 1N400x Series

Model	Reverse Voltage (VRRM)	Average Current	Typical Use
1N4001	50 V	1 A	Low-voltage DC supplies
1N4002	100 V	1 A	Wall adapters
1N4004	400 V	1 A	Up to 230 V rectifiers
1N4007	1000 V	1 A	Universal / mains

Compatibility: 1N4007 can replace any lower-voltage member of the family.

Applications

AC/DC rectifier in adapters and linear power supplies.
Bridge rectifier (x4 diodes) for full-wave conversion.
Flyback/free-wheeling protection for relays and coils.
Polarity protection at DC inputs.
Clamping & limiting with zeners/capacitors.
General DIY and educational projects.

How to Test a 1N4007 with a Multimeter

Set the meter to Diode Test mode.
Red probe to Anode, black to Cathode → reading ~0.6–0.7 V (forward drop).
Reverse the probes → meter shows OL (no conduction).

If it conducts both ways, the diode is shorted; if it shows OL both ways, it's open-replace it.

Circuit Example: Full-Wave Bridge Rectifier

 AC ~ ────┬────|>|────┬──── +VDC
                  |           |
                  |           |
                  └────|<|────┴──── 0V

Four 1N4007 diodes form a bridge that rectifies both halves of the AC waveform for smoother DC (with a filter capacitor).

Equivalents & Replacements

Model	Notes
UF4007	Fast-recovery (≈50 ns); same voltage & current ratings
1N5408	3 A / 1000 V (higher current)
1N5399	1.5 A / 1000 V
HER108	Ultra-fast rectifier
BY255	3 A / 1300 V, high-voltage option

Frequently Asked Questions

What is the maximum voltage rating of 1N4007?

1000 V (VRRM).

Can 1N4007 replace 1N4001 or 1N4004?

Yes. 1N4007 is backward-compatible with lower-voltage 1N400x parts.

Is 1N4007 good for high-frequency switching?

No. Use UF4007 or a Schottky for fast switching/SMPS.

How do I identify the cathode?

The striped band on the body marks the cathode (−).

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