Taiwan Semiconductor Corporation SR802HR0G

Overview

SR802HR0G from Taiwan Semiconductor is an AEC-Q101-qualified 8A, 20V Schottky barrier rectifier in DO-201AD package, featuring 0.55V forward voltage at 8A/25°C, 150A surge capability, and guard-ring overvoltage protection - deployed in automotive-grade DC-DC converters and SMPS secondary-side rectification.

For engineers reviewing the SR802HR0G datasheet, SR802HR0G pinout, SR802HR0G application, or SR802HR0G equivalent, key selection criteria include its 20V V_RRM, 125°C max junction temperature, AEC-Q101 qualification status, low VF performance, and DO-201AD mechanical compatibility with high-reliability power conversion designs.

Technical Context

This Schottky rectifier uses a single-die construction with guard-ring termination to enhance ruggedness against transient overvoltage events. Its 10,000 V/µs dv/dt rating and 150A non-repetitive surge current support robust operation in fast-switching topologies.

The device operates across -55°C to +125°C junction range (with extended 150°C option in higher-voltage variants), and achieves 40°C/W junction-to-ambient thermal resistance in standard PCB mounting - enabling compact, thermally efficient layouts in space-constrained adapters and on-board DC-DC modules.

Key Specifications

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and pass JESD201 Class 2 whisker testing. Weight: ~1.10 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-8EWH02-M3/45 and SB820, SR802HR0G uniquely combines AEC-Q101 qualification, DO-201AD through-hole compatibility, and 0.55V forward voltage - making it the only choice for automotive aftermarket adapters and industrial SMPS requiring field-serviceable leaded components.

Availability

SR802HR0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS secondary rectification, and USB-C PD adapter output stages requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SR802HR0G 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.

The SR802HR0G belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-reliability power conversion in harsh-environment applications including engine bays, factory floors, and telecom infrastructure.

FAQ

What does the "H" suffix in SR802HR0G indicate?

The "H" in SR802HR0G denotes AEC-Q101 qualification - confirming that the SR802HR0G has passed stress tests for automotive-grade reliability, including temperature cycling, humidity bias, and accelerated life testing. This makes SR802HR0G suitable for under-hood and safety-critical vehicle subsystems where standard industrial diodes would not be approved.

Is SR802HR0G compatible with lead-free soldering processes?

Yes, SR802HR0G features pure tin-plated leads compliant with J-STD-002 for solderability, and supports standard lead-free reflow profiles (peak 260°C). The DO-201AD package's 1.10g mass and thermal mass allow reliable wetting without tombstoning or voiding when using appropriate preheat and soak zones during assembly.

What is the maximum allowable junction temperature for SR802HR0G?

The SR802HR0G has a maximum junction temperature of 125°C under continuous operation. While some higher-voltage SR8xx variants support 150°C, the SR802HR0G variant is rated to 125°C - a critical limit for thermal design in enclosed adapters or automotive junction boxes where ambient temperatures may reach 85°C.

How does the guard ring in SR802HR0G improve system robustness?

The guard ring in SR802HR0G mitigates edge breakdown under high dv/dt conditions, raising the critical rate of rise of off-state voltage to 10,000 V/µs. In practice, this prevents premature avalanche failure during fast-switching transients in flyback or LLC converters - directly enhancing field failure rates in SR802HR0G-based power supplies.

Can SR802HR0G replace a standard silicon rectifier like 1N5408 in existing designs?

SR802HR0G can replace 1N5408 in many cases due to identical DO-201AD package and 8A rating, but requires verification of reverse voltage margin: 1N5408 supports 1000V V_RRM, while SR802HR0G is limited to 20V. It is only suitable where circuit reverse voltage remains ≤20V - such as low-voltage secondary windings or synchronous rectifier assist paths.