Taiwan Semiconductor Corporation DBLS151G

Overview

DBLS151G from Taiwan Semiconductor is a 1.5A, 50V repetitive peak reverse voltage (V_RRM) standard quad bridge rectifier in DBLS surface-mount package, featuring 50A peak surge current (I_FSM), 1.10V max forward voltage at 1.5A, and AEC-Q101 qualification option - used in compact AC/DC front-end stages of LED drivers and low-voltage adapters.

For engineers reviewing the DBLS151G datasheet, DBLS151G pinout, DBLS151G application, or DBLS151G equivalent, key selection criteria include V_RRM=50V rating, I_F=1.5A continuous capability, R_θJA=40°C/W thermal resistance, UL 94V-0 molded case, and compatibility with J-STD-002 soldering processes.

Technical Context

The DBLS151G integrates four silicon diodes in a single-phase full-wave bridge configuration with common-cathode and common-anode terminals externally accessible. Its DBLS package uses matte tin-plated leads and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.

Thermally, it delivers R_θJL = 15°C/W junction-to-lead and R_θJA = 40°C/W junction-to-ambient performance. Electrical behavior is characterized by ≤1.10V forward voltage at 1.5A/25°C and ≤2µA reverse leakage per diode at rated 50V and 25°C.

Key Specifications

Pinout & Package

DBLS151G is housed in a compact, surface-mount DBLS molded plastic package (UL 94V-0 rated) with four external terminals: two AC inputs (A1, A2), one common anode (CATH), and one common cathode (ANOD). Leads are matte tin-plated and compliant with J-STD-002 solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU4A and MB1S, DBLS151G uniquely combines SMT DBLS packaging, 50A surge rating, and optional AEC-Q101 qualification - making it the preferred choice for space-constrained, high-reliability 1.5A bridge rectification where thermal and mechanical robustness are critical.

Availability

DBLS151G is available at Aetrix Electronics and suitable for LED lighting drivers, USB-C power adapters, and industrial sensor power supplies requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

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 Taiwanese semiconductor manufacturer specializing in discrete power devices, rectifiers, and protection components since 1979.

The DBLS151G belongs to TSC's standard bridge rectifier product line, engineered for high-volume, cost-sensitive AC/DC conversion in consumer, industrial, and automotive-qualified power supplies.

FAQ

What is the maximum junction temperature specification for DBLS151G?

The DBLS151G has a maximum junction temperature (T_J) of +150°C, as specified in its absolute maximum ratings table. This rating enables reliable operation in enclosed environments such as LED driver housings or sealed power adapters. Derating begins above 25°C ambient, and thermal design must ensure that power dissipation - calculated using V_F × I_F and R_θJA - keeps actual T_J below this limit. The DBLS151G datasheet provides forward current derating curves for precise thermal modeling.

Is DBLS151G pin-compatible with other parts in the DBLS15xG series?

Yes, all DBLS15xG variants - including DBLS151G through DBLS159G - share identical DBLS package dimensions, pinout, and terminal assignments (A1, A2, ANOD, CATH). Only the V_RRM rating differs across the series (50V to 1400V), so PCB layout and soldering process remain unchanged when upgrading voltage grade. However, electrical validation is required for each target application due to differing reverse leakage and capacitance characteristics at higher V_RRM.

Does DBLS151G meet RoHS and halogen-free requirements?

Yes, DBLS151G is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. This compliance is confirmed in TSC's official product documentation and supported by material declarations available upon request - essential for CE marking and export to EU, Japan, and South Korea markets.

What is the forward voltage of DBLS151G at rated current?

The DBLS151G exhibits a maximum forward voltage (V_F) of 1.10 V per diode at I_F = 1.5 A and T_J = 25°C, as measured under pulsed conditions (PW = 0.3 ms). This value increases with junction temperature and current - typical V_F rises to ~1.25 V at 125°C. Designers should use this parameter to calculate conduction losses (P_COND ≈ 2 × V_F × I_F) in full-wave bridge configurations.

Can DBLS151G be used in automotive applications?

Yes - the AEC-Q101-qualified variant DBLS151GH is explicitly designed for automotive applications such as infotainment power supplies and body control modules. While the standard DBLS151G is not AEC-Q101 certified, its DBLS package meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, supporting robust SMT assembly. For automotive-grade deployment, only DBLS151GH should be selected and validated per vehicle manufacturer requirements.