Taiwan Semiconductor Corporation BA158G

Overview

BA158G from Taiwan Semiconductor is a 1A, 600V fast recovery rectifier diode in DO-204AL (DO-41) package, featuring 150 ns reverse recovery time, 1.2 V max forward voltage at 1 A, and 30 A surge capability. It serves as a primary output rectifier in switching-mode power supplies for industrial and automotive DC-DC converters.

For engineers reviewing the BA158G datasheet, BA158G pinout, BA158G application, or BA158G equivalent, key selection criteria include its 600 V repetitive peak reverse voltage, AEC-Q101 qualification option (BA158GH), thermal resistance of 60 °C/W, and compatibility with lead-free reflow soldering per J-STD-002.

Technical Context

The BA158G employs a single-die, glass-passivated PN junction optimized for fast switching in high-frequency SMPS topologies. Its 150 ns trr and low 1.2 V VF enable reduced conduction and switching losses compared to standard recovery rectifiers.

Designed for operation from –55 °C to +150 °C junction temperature, it supports stable performance under transient load conditions with 30 A non-repetitive surge rating and 5 µA max reverse leakage at 25 °C.

Key Specifications

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode indicated by a band; leads are pure tin plated and solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06 and ES1J, the BA158G offers optimal balance of speed (150 ns), conduction loss (1.2 V), and axial DO-41 fit-making it ideal for cost-sensitive, space-constrained 100–300 kHz industrial and automotive power supplies where AEC-Q101 compliance may be required.

Availability

BA158G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching inverter freewheeling paths, and automotive body control module power supplies requiring stable component supply and long-term sourcing continuity.

Supply support for BA158G 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 industrial, automotive, and consumer markets since 1979.

The BA158G belongs to TSC's BA15xG fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC conversion in thermally constrained environments.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) rating for BA158G?

The BA158G has a VRRM rating of 600 V, meaning it can block up to 600 V of reverse voltage continuously without breakdown. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version I2106). The BA158G is part of a series where BA157G = 400 V, BA158G = 600 V, and BA159G = 1000 V. Exceeding this voltage risks avalanche failure.

Is BA158G RoHS compliant and halogen-free?

Yes, BA158G is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. The molding compound meets UL 94V-0 flammability rating, and the pure tin-plated leads comply with J-STD-002 for lead-free soldering. These attributes are verified for all BA15xG variants including BA158G.

What is the reverse recovery time (trr) of BA158G and how is it measured?

The BA158G has a reverse recovery time (trr) of 150 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, as specified in the Electrical Specifications table. This parameter is critical for minimizing switching losses in high-frequency power supplies. The BA157G and BA159G share identical test conditions but differ in trr (150 ns and 250 ns respectively), confirming BA158G's mid-range speed within the family.

Does BA158G have an AEC-Q101 qualified version?

Yes, the AEC-Q101 qualified version of BA158G is designated BA158GH, as noted in the Ordering Information table. The "H" suffix indicates qualification to AEC-Q101 stress test standards for automotive discrete semiconductors. This variant is functionally identical to BA158G but undergoes additional reliability screening for under-hood applications.

What is the thermal resistance (R_θJA) of BA158G and what does it imply for PCB layout?

The BA158G has a junction-to-ambient thermal resistance (R_θJA) of 60 °C/W in the DO-204AL (DO-41) package. This means that with 1 A forward current and 1.2 V drop (1.2 W dissipation), the junction temperature will rise 72 °C above ambient-requiring careful attention to copper area, airflow, or spacing from heat sources. The datasheet specifies this value under standard JEDEC test conditions, and it applies directly to BA158G.