Taiwan Semiconductor Corporation 2A04G-T

Overview

2A04G-T from Diodes Incorporated is a 2.0A glass passivated general-purpose rectifier diode in DO-15 package, rated for 400V peak repetitive reverse voltage (VRRM), 1.1V forward voltage at 2.0A, and 65A non-repetitive surge current. It serves as a primary AC-to-DC conversion element in offline power supplies, adapter front-ends, and industrial control power stages.

For engineers reviewing the 2A04G-T datasheet, 2A04G-T pinout, 2A04G-T application, or 2A04G-T equivalent, key selection criteria include VRRM derating for capacitive loads, thermal resistance (60°C/W), junction temperature limits (–65°C to +175°C), and DO-15 mechanical compatibility with through-hole PCB layouts.

Technical Context

This device operates as a single-phase, half-wave silicon rectifier optimized for 60Hz line-frequency applications. Its glass passivated die construction ensures stable reverse leakage (<5µA at 25°C, <200µA at 100°C) and robust surge tolerance (65A, 8.3ms half-sine).

Thermal performance is defined by RθJA = 60°C/W under standard mounting conditions (leads held at ambient at 9.5mm from case), and forward conduction follows a typical VFM of 1.1V at IO = 2.0A - enabling efficient low-loss rectification in cost-sensitive power conversion stages.

Key Specifications

Pinout & Package

Package: DO-15 molded plastic case (UL 94V-0), axial leaded, cathode indicated by band. Weight ≈ 0.4 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R04 and MUR240, the 2A04G-T delivers optimal balance of low forward loss, robust surge handling, and DO-15 mechanical fit for cost-sensitive, thermally constrained 60Hz rectifier applications - without unnecessary speed or package complexity.

Availability

2A04G-T is available at Aetrix Electronics and suitable for AC-DC adapters, industrial PLC power supplies, and LED driver bulk rectification requiring stable component supply and long-lifecycle support.

Supply support for 2A04G-T 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The 2A01G–2A07G series targets cost-optimized, high-reliability line-frequency rectification - emphasizing ruggedness, thermal stability, and RoHS compliance for industrial and consumer power applications.

FAQ

Is 2A04G-T suitable for capacitive-input filter applications?

Yes, but with 20% average current derating per datasheet Note 1. At full 2.0A rating, it must be used with resistive or inductive loads; for capacitive inputs, maximum IO is reduced to 1.6A to prevent overheating and premature failure due to peak current stress.

What is the cathode identification method on 2A04G-T?

The cathode is marked by a distinct color band on the DO-15 body, located adjacent to lead 2. This band aligns with industry-standard polarity marking and must be oriented toward the positive DC output node during PCB placement.

Does 2A04G-T require heatsinking in typical 2A operation?

No external heatsink is required below 55°C ambient when leads are maintained at ambient temperature at 9.5mm from the case. Above that temperature, thermal derating per Fig. 1 applies - e.g., ~1.4A at 100°C ambient - based on its RθJA of 60°C/W.

Can 2A04G-T replace 2A03G-T in a 200V design?

No - 2A03G-T is rated for 200V VRRM, while 2A04G-T is rated for 400V. Substituting a higher-voltage part is electrically safe but may incur unnecessary cost and slightly higher VFM (1.1V vs. 1.0V for 2A03G-T at 2A); verify layout clearance and thermal impact before replacement.