Diodes Incorporated 1N5404-B

Overview

1N5404-B from Diodes Incorporated is a 3.0A, 400V peak repetitive reverse voltage general-purpose silicon rectifier diode in DO-201AD package, featuring 1.0V forward voltage at 3.0A, 200A non-repetitive surge capability, and 10μA reverse leakage at 25°C - used in AC/DC power supplies, battery chargers, and DC motor drive input stages.

For engineers reviewing the 1N5404-B datasheet, 1N5404-B pinout, 1N5404-B application, or 1N5404-B equivalent, key selection criteria include rated blocking voltage (400V), thermal resistance (15°C/W), surge robustness (200A @ 8.3ms), and DO-201AD mechanical compatibility with high-current PCB layouts.

Technical Context

This axial-lead rectifier operates in single-phase, half-wave configurations with resistive or inductive loads at 60Hz; capacitive loads require 20% current derating. Its diffused junction enables low V_F and stable IR performance across -65°C to +150°C operating range.

Thermal design relies on lead-to-ambient conduction: rated 3.0A average output assumes leads held at ambient temperature 9.5mm from case. Total capacitance is 50pF at 1MHz/4V reverse bias, limiting high-frequency switching use.

Key Specifications

Pinout & Package

Package: DO-201AD molded plastic case (UL 94V-0), axial-leaded, cathode indicated by band. Weight: ~1.1 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar rectifier applications.

Compared with 1N5404G and RS304, the 1N5404-B offers lowest typical forward voltage in the standard DO-201AD form factor, enabling simpler thermal management in space-constrained power supplies without heatsinks.

Availability

1N5404-B is available at Aetrix Electronics and suitable for AC/DC power supplies, battery chargers, and industrial control power modules requiring stable component supply and long-lifecycle support.

Supply support for 1N5404-B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection devices.

The 1N5400–1N5408 series targets cost-sensitive, high-volume AC/DC front-end rectification, emphasizing rugged surge handling and thermal stability in legacy power designs.

FAQ

Is the 1N5404-B suitable for high-frequency switching applications?

No. With 50pF junction capacitance and slow reverse recovery (not specified but typical of general-purpose rectifiers), it is optimized for 50/60Hz line-frequency rectification-not SMPS or PWM circuits. Use fast recovery or Schottky diodes for >1kHz operation.

What is the maximum allowable case temperature for continuous 3.0A operation?

The 3.0A rating is specified at T_A = 105°C with leads held at ambient 9.5mm from the case. Case temperature will exceed ambient; actual max case temperature depends on layout and airflow but should not exceed 150°C per T_j limit.

Does the "-B" suffix indicate tape-and-reel packaging?

No. Per Diodes Incorporated ordering information, "-B" denotes 500-piece bulk packaging in DO-201AD. Tape-and-reel variants use "-T" (e.g., 1N5404-T), packaged in 1.2K reels on 13-inch cores.

Can the 1N5404-B replace a 1N5406 in a 400V circuit?

Yes-only if the original design uses 1N5406 for its 600V rating and the actual circuit voltage never exceeds 400V. Substituting a lower V_RRM part risks reverse breakdown under transient overvoltage; verify worst-case line conditions before replacement.