Taiwan Semiconductor Corporation DBLS151G RDG

Overview

DBLS151G from Taiwan Semiconductor is a 1.5A, 50V repetitive peak reverse voltage (VRRM) standard quad bridge rectifier in DBLS package, with 50A peak surge current (IFSM), 1.10V max forward voltage at 1.5A, and AEC-Q101 qualification option. It serves as AC-to-DC conversion core in compact off-line power supplies.

For engineers reviewing the DBLS151G datasheet, DBLS151G pinout, DBLS151G application, or DBLS151G equivalent, key selection criteria include VRRM margin for input rectification, thermal resistance (RθJL = 15°C/W), surge robustness (IFSM = 50A), and RoHS/halogen-free compliance for automotive and industrial end equipment.

Technical Context

The DBLS151G integrates four silicon diodes in a single-phase bridge configuration with common-cathode/common-anode topology. Its 50V VRRM rating targets low-voltage AC inputs (e.g., 24VAC or 36VAC systems), and its 1.5A average forward current (IF) supports continuous conduction mode operation up to ~75°C ambient with adequate PCB copper area.

Thermal performance is defined by RθJL = 15°C/W (junction-to-lead) and RθJA = 40°C/W (junction-to-ambient), enabling direct soldering to FR-4 PCBs without heatsinks in ≤1.5W dissipation applications. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.

Key Specifications

Pinout & Package

Package: DBLS - Surface-mount molded plastic case (UL 94V-0), 4-pin single-phase bridge configuration with marked polarity (AC1, AC2, +, – terminals). Dimensions per Taiwan Semiconductor outline drawing Rev. M2103.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU4A and DF02MA, the DBLS151G offers superior thermal performance (RθJL = 15°C/W), AEC-Q101 qualification path, and optimized surface-mount footprint-making it preferred for new designs targeting automotive, industrial, and medical auxiliary power where reliability, size, and thermal headroom are critical.

Availability

DBLS151G is available at Aetrix Electronics and suitable for switching mode power supplies, lighting drivers, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and compliance with RoHS and halogen-free mandates.

Supply support for DBLS151G 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, specializing in rectifiers, TVS diodes, MOSFETs, and power management components.

The DBLS151G belongs to TSC's DBLS-series standard bridge rectifiers, engineered for cost-sensitive, high-volume AC/DC front-end applications where reliability, thermal efficiency, and regulatory compliance are prioritized over ultra-low VF or ultra-high VRRM.

FAQ

What is the maximum operating temperature for DBLS151G?

The DBLS151G has a maximum junction temperature (TJ max) of +150°C and a storage temperature range of −55°C to +150°C. Its thermal design relies on RθJL = 15°C/W to transfer heat from the die to the PCB leads, allowing reliable operation in enclosed industrial enclosures up to 75°C ambient when mounted on ≥1 cm² 2-oz copper.

Is DBLS151G pin-compatible with other DBLS-series rectifiers like DBLS152G?

Yes, all DBLS151G through DBLS159G share identical DBLS package dimensions, pinout (AC1, AC2, +, –), and mechanical footprint. Only VRRM (50V to 1400V) and VF (1.10V to 1.25V) differ across the series-enabling direct substitution where voltage rating permits.

Does DBLS151G meet automotive qualification standards?

The base DBLS151G is not AEC-Q101 qualified, but the variant DBLS151GH is explicitly qualified per AEC-Q101. This version undergoes stress testing including HTOL, TC, and UHAST, and is marked with "H" suffix-making it suitable for automotive body electronics and infotainment power supplies.

What is the forward voltage drop of DBLS151G at rated current?

The DBLS151G exhibits a maximum forward voltage (VF) of 1.10 V per diode at IF = 1.5 A and TJ = 25°C, measured under pulse conditions (PW = 0.3 ms). At elevated junction temperatures (e.g., 125°C), VF decreases slightly due to negative temperature coefficient of silicon diodes.

How is polarity marked on the DBLS151G package?

Polarity on the DBLS151G is marked per standard bridge convention: the cathode bar (–) is indicated by a molded notch or beveled edge on the package body, adjacent to the negative DC output terminal. The + terminal is diagonally opposite; AC1 and AC2 are the remaining two pins, with no functional distinction between them in single-phase operation.