Taiwan Semiconductor Corporation DBL157G-T

Overview

DBL157G-T from Taiwan Semiconductor is a 1.5A, 1000V repetitive peak reverse voltage (V_RRM) standard quad bridge rectifier in DBL package, featuring 50A non-repetitive surge current capability and 15 °C/W junction-to-lead thermal resistance, used in AC/DC front-end conversion for industrial SMPS and lighting ballasts.

For engineers reviewing the DBL157G-T datasheet, DBL157G-T pinout, DBL157G-T application, or DBL157G-T equivalent, key selection criteria include V_RRM = 1000 V, I_F = 1.5 A, I_FSM = 50 A, T_J(max) = 150 °C, and UL Recognized File # E-326854 compliance for safety-critical power supplies.

Technical Context

This device integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals externally accessible. It operates across -55 °C to +150 °C junction temperature range and supports soldering per J-STD-002 with matte tin-plated leads.

Thermal performance is defined by R_θJL = 15 °C/W and R_θJA = 40 °C/W; electrical behavior includes V_F ≤ 1.1 V at I_F = 1.5 A and I_R ≤ 2 µA at 25 °C under rated reverse voltage.

Key Specifications

Pinout & Package

Package: DBL - Molded plastic case meeting UL 94V-0 flammability rating; 4-pin single-phase bridge configuration with marked polarity (AC1, AC2, +, –) and matte tin-plated leads compliant with JESD 201 Class 1A whisker test.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU6K and GBU4J, DBL157G-T provides superior voltage margin (1000 V) in compact DBL packaging while maintaining 1.5 A rating-ideal for space-constrained, high-surge industrial and lighting designs where voltage headroom is critical.

Availability

DBL157G-T is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, LED driver power stages, and AC-DC adapters requiring stable component supply, long-term lifecycle support, and UL-recognized reliability.

Supply support for DBL157G-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 industrial, computing, and consumer markets since 1979.

The DBL series bridges are designed specifically for high-reliability, cost-sensitive AC/DC front-end rectification in industrial power supplies and lighting systems, emphasizing UL recognition, thermal robustness, and RoHS/halogen-free compliance.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) specified for DBL157G-T?

The DBL157G-T has a maximum repetitive peak reverse voltage (V_RRM) of 1000 V, as confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2103). This rating applies across the full operating temperature range and defines the highest AC peak voltage the device can block reliably in continuous operation.

Does DBL157G-T meet UL safety certification requirements?

Yes, DBL157G-T is UL Recognized with File # E-326854, verifying compliance with UL 60747-1 for discrete semiconductors. This certification supports its use in end products requiring safety agency approval, including industrial power supplies and LED lighting systems sold in North America and other regulated markets.

What is the forward voltage drop (V_F) of DBL157G-T at rated current?

The DBL157G-T exhibits a maximum forward voltage drop (V_F) of 1.1 V per diode at I_F = 1.5 A and T_J = 25 °C, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction losses in the rectifier stage.

What package type does DBL157G-T use, and what are its key mechanical attributes?

DBL157G-T uses the DBL molded plastic package, which meets UL 94V-0 flammability rating. Its matte tin-plated leads comply with J-STD-002 solderability standards and JESD 201 Class 1A whisker testing. Polarity is marked on the device body, and typical weight is 0.360 g.

Is DBL157G-T suitable for high-temperature environments such as enclosed LED drivers?

Yes, DBL157G-T supports operation from -55 °C to +150 °C junction temperature and features R_θJL = 15 °C/W, enabling effective thermal dissipation in thermally demanding LED driver enclosures. Its UL recognition and halogen-free construction further align with long-life, high-reliability lighting applications.