Lumimax Optoelectronic Technology 1N5401

Overview

1N5401 from Diodes Incorporated is a 3.0A, 100V 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 control circuits.

For engineers reviewing the 1N5401 datasheet, 1N5401 pinout, 1N5401 application, or 1N5401 equivalent, key selection factors include its 100V blocking rating, thermal resistance of 15°C/W, derated current handling up to 105°C ambient, and DO-201AD mechanical compatibility with high-reliability industrial power conversion designs.

Technical Context

The 1N5401 operates as a single-phase, half-wave silicon rectifier with diffused junction construction, optimized for resistive or inductive loads at 60Hz line frequency. Its design supports capacitive-load derating (−20% current) and withstands transient surges up to 200A (8.3ms half-sine).

Thermal performance is defined by junction-to-ambient resistance of 15°C/W under standard lead conditions (9.5mm from case), with operating temperature range spanning −65°C to +150°C and moisture sensitivity level 1 per J-STD-020C.

Key Specifications

Pinout & Package

Package: DO-201AD molded 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 rectifier diode applications.

Compared with 1N5402 and 1N5400, the 1N5401 provides optimal balance of 100V blocking margin and cost efficiency for standard 120VAC-derived power supplies, avoiding unnecessary derating or overspec while maintaining full 3.0A/200A capability.

Availability

1N5401 is available at Aetrix Electronics and suitable for AC/DC power supplies, battery chargers, and industrial relay snubbing requiring stable component supply and long-lifecycle support.

Supply support for 1N5401 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 for industrial, computing, and consumer markets.

The S3A–S3M series - including the 1N5401 - was engineered for cost-sensitive, high-volume AC/DC rectification applications demanding proven surge robustness and RoHS-compliant packaging.

FAQ

Is the 1N5401 RoHS compliant?

Yes, the 1N5401 features lead-free finish and complies with RoHS Directive 2002/95/EC (as revised March 13, 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 ambient temperature for full 3.0A operation?

Full 3.0A average forward current is rated at TA = 105°C, provided leads are maintained at ambient temperature at a distance of 9.5 mm from the case. Above 105°C, current must be linearly derated per Figure 1 in the datasheet, reaching zero at 175°C.

Can the 1N5401 be used in capacitive-input filter circuits?

Yes, but with 20% current derating applied to the 3.0A rating due to higher peak currents drawn by capacitive loads. This ensures safe operation within thermal and surge limits specified for 60Hz resistive/inductive loads.

Does the 1N5401 have a specified junction-to-case thermal resistance?

No - the datasheet specifies only junction-to-ambient thermal resistance (RθJA = 15°C/W) under defined mounting conditions (leads at ambient, 9.5 mm from case). Junction-to-case (RθJC) is not published, so heatsink interface design must rely on RθJA and empirical thermal validation.