Part of the Day · 1N4007 — DO-41 1A 1000V rectifier diode

Part of the Day · 2026-10-23

The leaded 1A rectifier diode you see most often in power supplies. It is the highest-voltage 1000V type in the 1N4001–1N4007 series.

Actual size

↓ Actual size, left edge aligned to 0 on the ruler

One ruler tick = 1mm. On PC this is actual size on a 24-inch FHD monitor at 100% zoom; on iPhone it adjusts automatically. For other screens, use “Calibrate ruler” below.

Enlarged (DO-41 · top view · approx. 13×)

Pins The banded end is the cathode (−)

leads partly shown · Package DO-41

Key specifications

Values are from the onsemi datasheet.

Marking and pins

Typical uses

• AC rectification (bridge / half-wave), adapters and power supplies
• Reverse-polarity protection (in series with the power input)
• Absorbing back-EMF from relay and motor coils

Companion & similar parts

• 1N4004 — 400V type from the same datasheet — everything else (1A, 30A surge, etc.) is the same
• 1N4001 — 50V type of the same series — only the voltage is lower; 1N4007 can replace it, but not the other way round
• 1N4148 — For fast small-signal switching (100V, 200mA) — cannot replace it in a 1A position

The body is marked 1N4007 plus a year/week code. As a standard-recovery type it is too slow for high-frequency rectification in switching power supplies (use a Schottky or fast-recovery diode there).