Diodes Incorporated 1N5402-B

Overview

1N5402-B from Diodes Incorporated is a 3.0A, 200V 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 low 10μA reverse leakage at 25°C - used in AC/DC power supplies, battery chargers, and DC motor drive input stages.

For engineers reviewing the 1N5402-B datasheet, 1N5402-B pinout, 1N5402-B application, or 1N5402-B equivalent, key selection criteria include V_RRM = 200V, I_O = 3.0A @ T_A = 105°C, I_FSM = 200A (8.3ms), V_FM = 1.0V @ 3.0A, and DO-201AD mechanical compatibility with high-temp soldering and UL 94V-0 molded plastic housing.

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 stable thermal performance up to +150°C junction temperature and low reverse leakage across temperature range.

Thermal resistance is 15°C/W junction-to-ambient (with leads held at ambient at 9.5mm from case), and total capacitance is 50pF at 1MHz/4V reverse bias - critical for EMI filtering and snubber design in offline power conversion stages.

Key Specifications

Pinout & Package

DO-201AD package: axial-leaded, molded black plastic case (UL 94V-0), cathode indicated by band, tin-plated leads solderable per MIL-STD-202 Method 208, weight ≈1.1 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5402-T, the -B variant offers immediate prototyping flexibility via bulk packaging; versus RS2M, it delivers higher current at lower cost but lacks fast-recovery capability needed in SMPS secondary rectification.

Availability

1N5402-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 1N5402-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 high-reliability power management and signal integrity solutions.

The 1N5400–1N5408 series targets cost-sensitive, high-volume rectification in legacy and industrial power supplies - emphasizing ruggedness, thermal stability, and broad mechanical compatibility.

FAQ

Is 1N5402-B RoHS compliant?

Yes, 1N5402-B features lead-free finish and complies with RoHS Directive 2002/95/EC (revision 13.2.2003), including exemptions for glass and high-temperature solder per EU Annex Notes 5 and 7. Tin-plated leads meet MIL-STD-202 Method 208 solderability requirements.

What is the maximum operating temperature for 1N5402-B?

The junction and storage temperature range is –65°C to +150°C. Derating begins at T_A = 25°C: average forward current drops linearly to zero at 175°C ambient, per Figure 1 in DS28007 Rev. 8–3.

Can 1N5402-B replace 1N5400 in a 50V design?

No - 1N5402-B has V_RRM = 200V and is over-specified for 50V applications; using it introduces unnecessary cost and board space. The 1N5400 (V_RRM = 50V) is the correct match for 50V-rated designs per datasheet grouping.

Does 1N5402-B support capacitive load operation?

Yes, but with 20% average current derating per datasheet note. For example, maximum I_O drops from 3.0A to 2.4A at T_A = 105°C when driving a capacitive-input filter, due to increased peak current stress during charging cycles.