Taiwan Semiconductor Corporation 1N5819 B0G

Overview

1N5819 B0G from Taiwan Semiconductor is a 1 A, 40 V Schottky barrier rectifier in DO-204AL (DO-41) package, featuring 0.60 V max forward voltage at 1 A and 30 A surge current capability; used in DC-DC converters for high-efficiency low-voltage rectification.

For engineers reviewing the 1N5819 B0G datasheet, 1N5819 B0G pinout, 1N5819 B0G application, or 1N5819 B0G equivalent, key selection factors include reverse voltage rating (40 V), thermal resistance (100 °C/W), junction capacitance (55 pF), AEC-Q101 qualification status, and DO-41 mechanical compatibility.

Technical Context

This discrete Schottky diode uses a single-die construction with guard ring protection to withstand transient overvoltage events. Its low VF and fast switching enable high-frequency operation without minority-carrier storage delay.

The device operates across –55 °C to +125 °C junction temperature range and exhibits 10,000 V/µs critical dv/dt rating, supporting reliable performance in noisy switching environments such as flyback and buck converter outputs.

Key Specifications

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode indicated by band; leads are pure tin plated, solderable per J-STD-002, UL 94V-0 molded compound, 0.330 g weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB140 and SS14, the 1N5819 B0G offers verified DO-41 axial lead compatibility, AEC-Q101 availability, and consistent 0.60 V VF specification - making it optimal for legacy through-hole industrial and automotive repair applications where lead-forming and hand-soldering are standard.

Availability

1N5819 B0G is available at Aetrix Electronics and suitable for switching mode power supplies, DC-DC converters, and automotive body control modules requiring stable component supply and long-term sourcing continuity.

Supply support for 1N5819 B0G 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 and automotive markets since 1979.

The 1N5817–1N5819 series belongs to TSC's general-purpose Schottky rectifier product line, engineered for high-reliability, low-loss power conversion in cost-constrained applications where efficiency and ruggedness are balanced.

FAQ

What is the maximum junction temperature rating for the 1N5819 B0G?

The 1N5819 B0G has a maximum junction temperature (T_J) of +125 °C and a minimum of –55 °C. This rating applies across its full operating range and is validated per JEDEC standards. Derating curves in the official Taiwan Semiconductor datasheet show linear reduction of average forward current above 25 °C ambient, ensuring safe thermal operation in enclosed enclosures or high-temperature environments. The 1N5819 B0G must be mounted with adequate PCB copper area to maintain this limit under 1 A continuous load.

Does the 1N5819 B0G have AEC-Q101 qualification?

The 1N5819 B0G itself is not AEC-Q101 qualified; however, the 1N5819H variant (same electrical specs, DO-41 package) carries full AEC-Q101 certification. The "B0G" suffix indicates green molding compound and ammo box packaging - not automotive qualification. Engineers requiring AEC-Q101 compliance must specify 1N5819H or 1N5819HA0G. The 1N5819 B0G remains suitable for industrial and commercial applications where automotive stress testing is not mandated.

What does the "B0G" suffix mean in 1N5819 B0G?

The "B0G" suffix in 1N5819 B0G denotes Taiwan Semiconductor's packaging and environmental coding: "B" indicates standard non-AEC-Q101 grade, "0" is a revision placeholder, and "G" confirms halogen-free, RoHS-compliant green compound per IEC 61249-2-21. It is shipped in 3,000-piece ammo boxes. This differs from "H"-suffixed parts (e.g., 1N5819H), which indicate AEC-Q101 qualification, and "A0G", which specifies ammo box packaging without the "H" grade.

How does the 1N5819 B0G compare to the 1N5817 and 1N5818 in terms of reverse voltage rating?

The 1N5819 B0G is rated for 40 V repetitive peak reverse voltage (V_RRM), whereas the 1N5817 and 1N5818 are rated for 20 V and 30 V respectively. All three share identical forward current (1 A), surge current (30 A), and package (DO-41), but differ only in V_RRM and corresponding forward voltage - the 1N5819 B0G exhibits 0.60 V max VF vs. 0.45 V for the 1N5817. Select the 1N5819 B0G when system-level reverse transients exceed 30 V.

Is the 1N5819 B0G suitable for high-frequency switching applications like 500 kHz DC-DC converters?

Yes, the 1N5819 B0G is well-suited for high-frequency switching applications up to 500 kHz due to its Schottky architecture - which eliminates minority carrier storage delay and enables nanosecond-scale reverse recovery. Its 55 pF junction capacitance and 10,000 V/µs dv/dt rating support clean commutation in buck, boost, and flyback topologies. However, layout parasitics and thermal management remain critical; the 1N5819 B0G must be placed close to the switching node with minimized trace inductance to preserve performance.