Taiwan Semiconductor Corporation SR102 A0G

Overview

SR102 A0G from Taiwan Semiconductor is a 1A, 20V Schottky barrier rectifier in DO-204AL (DO-41) package, featuring low forward voltage drop (0.55 V at 1A, 25°C), 30A surge capability, and junction temperature rating up to +125°C. It serves as a primary output rectifier in compact AC/DC adapters and DC-DC converters where efficiency and thermal performance are critical.

For engineers reviewing the SR102 A0G datasheet, SR102 A0G pinout, SR102 A0G application, or SR102 A0G equivalent, key selection criteria include its 20V repetitive peak reverse voltage, 90°C/W junction-to-ambient thermal resistance, AEC-Q101 qualification availability (via H-suffix variants), RoHS/halogen-free compliance, and DO-41 mechanical compatibility with legacy through-hole power supply layouts.

Technical Context

This Schottky rectifier uses a single-die construction with guard ring protection to enhance overvoltage robustness. Its low VF enables reduced conduction loss in high-frequency switching topologies, while the 10,000 V/µs dv/dt rating supports reliable operation in fast-switching SMPS circuits.

The device operates across –55°C to +125°C junction range and exhibits 500 µA max reverse leakage at 25°C and rated VR. Thermal derating follows a defined curve: average forward current drops from 1A at 25°C to ~0.6A at 100°C ambient, per the published derating chart.

Key Specifications

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode band marking; leads are pure tin plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SR102 A0G, VS-1EWH02-M3/5AT offers marginally lower VF but lacks AEC-Q101 availability, while SB120-E3/54 provides identical performance with broader logistics support-making it ideal for production ramp where supply chain resilience matters more than 0.01 V VF gain.

Availability

SR102 A0G is available at Aetrix Electronics and suitable for AC/DC adapters, USB-C power delivery modules, and industrial DC-DC converters requiring stable component supply, consistent DO-41 mechanical fit, and verified Schottky performance at 20 V/1 A.

Supply support for SR102 A0G 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 power management and automotive markets since 1979.

The SR102 A0G belongs to TSC's SR1xx Schottky rectifier product line, engineered specifically for high-efficiency, low-profile AC/DC and DC/DC power conversion in consumer, industrial, and automotive auxiliary power applications.

FAQ

What is the maximum junction temperature rating for SR102 A0G?

The SR102 A0G has a maximum junction temperature (TJ max) of +125°C. This rating applies under continuous operation with appropriate thermal management. The device is also rated for storage between –55°C and +150°C. Exceeding +125°C junction temperature risks parametric shift and accelerated degradation, so layout and ambient conditions must ensure thermal limits are respected in the final SR102 A0G application.

Is SR102 A0G AEC-Q101 qualified?

No, SR102 A0G is not AEC-Q101 qualified. However, the SR102H variant-identical in all electrical and thermal specifications-is explicitly qualified per AEC-Q101. The "H" suffix denotes automotive qualification, while "A0G" indicates green, halogen-free packaging in ammo box format. For automotive-grade deployment, SR102H should be specified instead of SR102 A0G.

What does the "A0G" suffix mean in SR102 A0G?

The "A0G" suffix in SR102 A0G indicates two attributes: "A0" specifies ammo box packaging (3,000 units per box), and "G" denotes halogen-free, RoHS-compliant molding compound per IEC 61249-2-21. This suffix does not affect electrical parameters-it is purely a packaging and material compliance designation. All SR102 variants share identical VRRM, VF, IFSM, and thermal characteristics regardless of suffix.

Can SR102 A0G replace a 1N5817 in an existing design?

Yes, SR102 A0G is a direct form-fit and function replacement for the 1N5817: both are DO-41 packaged 1A, 20V Schottky rectifiers. SR102 A0G offers lower typical VF (0.55 V vs. 0.45–0.5 V for 1N5817), tighter IR control (500 µA max vs. 1 mA), and improved thermal resistance (90°C/W vs. ~100°C/W). No PCB changes are needed, though layout review for thermal relief and cathode band alignment is recommended before migration.

What is the reverse leakage current specification for SR102 A0G at 100°C?

At TJ = 100°C and rated VR (20 V), the SR102 A0G exhibits a maximum reverse leakage current (IR) of 10 mA. This value is confirmed in the Electrical Specifications table under "Reverse current @ rated VR" for SR102–SR104 groupings. At 25°C, IR is limited to 500 µA max; the exponential rise with temperature must be accounted for in high-ambient designs using SR102 A0G.