Taiwan Semiconductor Corporation ABS8-K

Overview

ABS8-K from Taiwan Semiconductor is a 1A, 800V standard bridge rectifier in ABS package with quad configuration, glass-passivated junctions, 30A peak surge capability, and UL Recognized (E-326854) construction - used in AC/DC front-end stages of compact SMPS and LED drivers.

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

Technical Context

The ABS8-K integrates four silicon diodes in a single-phase full-wave bridge configuration, enabling direct AC-to-DC conversion without external interconnection. Its glass-passivated junction ensures stable reverse leakage (<10 µA at 25°C, <150 µA at 125°C) and high reliability under repeated surge stress (IFSM = 30 A, 8.3 ms half-sine).

Thermally, it supports operation from –55°C to +150°C junction temperature, with R_θJA = 80 °C/W (free air) and R_θJL = 25 °C/W - optimized for conduction-cooled mounting on aluminum substrates where 1.0 A continuous forward current is rated.

Key Specifications

Pinout & Package

Package: ABS - molded plastic case meeting UL 94V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 1A whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU8K and DB108S, ABS8-K delivers balanced performance: UL recognition enables faster certification, its 30 A I_FSM exceeds GBU8K while maintaining lower V_F than DB108S, and its 1.0 A rating on aluminum substrate matches typical SMPS thermal layouts without overdesign.

Availability

ABS8-K is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB wall adapters requiring stable component supply, consistent parametric performance, and full regulatory documentation including UL file access and RoHS/halogen-free declarations.

Supply support for ABS8-K 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, automotive, and industrial markets since 1979.

The ABS-K series was designed specifically for cost-sensitive, high-volume AC/DC front-end applications demanding reliable bridge rectification in compact surface-mount packages with certified safety and environmental compliance.

FAQ

What is the maximum continuous forward current rating for ABS8-K?

The ABS8-K has two forward current ratings depending on PCB mounting: 0.8 A when mounted on standard glass-epoxy (FR-4) PCB, and 1.0 A when mounted on an aluminum substrate. This higher rating leverages the ABS package's low R_θJL (25 °C/W) for improved thermal conduction. Designers must select the appropriate rating based on actual board construction - ABS8-K performance in real-world SMPS designs relies on correct thermal implementation.

Does ABS8-K meet UL safety certification requirements?

Yes, ABS8-K is UL Recognized under File #E-326854, confirming compliance with UL 60950-1 and UL 62368-1 for use in end equipment. This recognition covers flammability (UL 94V-0), moisture sensitivity (J-STD-020 Level 1), and construction integrity. ABS8-K's UL status eliminates the need for additional component-level safety testing during final product certification - a key advantage for ABS8-K in regulated power supply designs.

What is the marking code printed on the ABS8-K device body?

The ABS8-K is marked "ABS8" on its top surface, followed by a date code (YW) and factory code (F), per the official Taiwan Semiconductor marking diagram. This distinguishes it from ABS4-K (marked ABS4), ABS6-K (ABS6), and ABS10-K (ABS10). The marking is laser-etched and visible under 10× magnification; ABS8-K's unique marking ensures traceability and prevents substitution errors in automated assembly and field service.

Can ABS8-K replace ABS6-K or ABS10-K in an existing design?

No - ABS8-K is not a drop-in replacement for ABS6-K or ABS10-K due to different V_RRM ratings (800 V vs. 600 V or 1000 V). Substituting ABS8-K for ABS6-K risks overvoltage failure in high-line conditions; using it instead of ABS10-K reduces safety margin in 277 V_AC or surge-prone environments. ABS8-K must be selected only where 800 V blocking is explicitly required - its electrical identity is fixed and non-interchangeable within the ABS-K family.

Is ABS8-K suitable for lead-free reflow soldering processes?

Yes, ABS8-K is qualified for lead-free reflow soldering per J-STD-002, with matte tin-plated leads and moisture sensitivity level 1 (MSL-1), meaning it can be stored indefinitely at ≤30°C/60% RH without baking. Its ABS package withstands peak reflow temperatures up to 260°C for 10 seconds. ABS8-K's compatibility with standard Pb-free SMT lines reduces process complexity and makes it ideal for high-yield manufacturing of ABS8-K-based power supplies.