Taiwan Semiconductor Corporation ABS8-T

Overview

ABS8-T from Taiwan Semiconductor is a 1A, 800V standard bridge rectifier in ABS package, featuring glass-passivated junctions, 30A peak surge current (8.3ms), and UL recognition (E-326854), used in AC/DC front-end stages of switching mode power supplies.

For engineers reviewing the ABS8-T datasheet, ABS8-T pinout, ABS8-T application, or ABS8-T equivalent, key selection criteria include repetitive peak reverse voltage (800V), forward current rating (1.0A on aluminum substrate), thermal resistance (R_θJL = 25°C/W), and RoHS/halogen-free compliance per IEC 61249-2-21.

Technical Context

The ABS8-T integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals. Its glass-passivated junction ensures stable reverse leakage (<10µA at 25°C) and high reliability under thermal cycling.

Designed for surface-mount assembly on FR-4 or aluminum substrates, it supports automated placement and meets JESD201 Class 1A whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.

Key Specifications

Pinout & Package

Package: ABS - molded plastic case with matte tin-plated leads, UL 94V-0 rated, polarity marked on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU8K and MB10F, the ABS8-T offers superior thermal performance (R_θJL = 25°C/W), tighter V_F spec (≤0.95V), and UL recognition-making it optimal for volume-manufactured, thermally constrained, safety-certified power supplies.

Availability

ABS8-T is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and industrial AC/DC adapters requiring stable component supply and long-term manufacturability.

Supply support for ABS8-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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global power and protection markets since 1979.

The ABS series was developed specifically for cost-sensitive, high-volume AC/DC front-end rectification in consumer and industrial power supplies, emphasizing reliability, automated assembly compatibility, and regulatory compliance.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for ABS8-T?

The ABS8-T has a maximum repetitive peak reverse voltage (V_RRM) of 800 V, as specified in the Absolute Maximum Ratings table. This value defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown. It is confirmed across all official Taiwan Semiconductor documentation versions (C2103) and distinguishes ABS8-T from ABS6-T (600 V) and ABS10-T (1000 V). The ABS8-T must not be operated beyond this rating in any design.

Does ABS8-T support automated pick-and-place assembly?

Yes, ABS8-T supports automated pick-and-place assembly. Its ABS package features matte tin-plated leads compliant with J-STD-002 solderability standards and is explicitly noted in the datasheet as "ideal for automated placement." The device also meets JESD201 Class 1A whisker resistance and J-STD-020 Level 1 moisture sensitivity, eliminating pre-bake requirements and enabling direct use in high-speed SMT lines without process modification.

What is the forward voltage (V_F) specification for ABS8-T at typical operating conditions?

The forward voltage (V_F) for ABS8-T is specified as ≤0.95 V per diode at I_F = 0.4 A and T_J = 25°C, under pulse test conditions (PW = 0.3 ms). This value reflects conduction loss across one diode leg in the bridge. Since ABS8-T contains four diodes in series pair configuration, total bridge drop is approximately twice this value under balanced load. The datasheet confirms this limit applies to all ABS6-T through ABS10-T variants.

Is ABS8-T certified for safety standards such as UL recognition?

Yes, ABS8-T is UL Recognized under File # E-326854, as stated in the FEATURES section of the official Taiwan Semiconductor datasheet. This certification applies to the entire ABS6-T to ABS10-T family and validates compliance with UL/CSA 60950-1 and 62368-1 for use in end equipment. UL recognition covers flammability (UL 94V-0), terminal plating, and construction integrity-critical for power supply safety approvals.

What is the junction-to-lead thermal resistance (R_θJL) of ABS8-T, and why does it matter?

The junction-to-lead thermal resistance (R_θJL) of ABS8-T is 25°C/W, as published in the THERMAL PERFORMANCE section. This parameter quantifies how effectively heat transfers from the silicon junction to the device leads-key for estimating temperature rise when mounted directly to a PCB copper pour or aluminum substrate. A low R_θJL enables higher power dissipation without external heatsinking, making ABS8-T suitable for space-constrained, fanless power supplies where thermal management relies on PCB layout.