Taiwan Semiconductor Corporation SR506

Overview

SR506 from Taiwan Semiconductor is a 5A, 60V Schottky barrier rectifier in DO-201AD package, featuring low forward voltage (0.70 V at 5A, 25°C), 120A surge capability, and AEC-Q101 qualification option. It serves as a high-efficiency output rectifier in DC/DC converters and AC/DC adapters where thermal performance and reliability under repetitive surge stress are critical.

For engineers reviewing the SR506 datasheet, SR506 pinout, SR506 application, or SR506 equivalent, key selection criteria include its 60V V_RRM, 10 mA reverse leakage at 100°C, junction-to-case thermal resistance of 6°C/W, and compatibility with lead-free reflow soldering per J-STD-002.

Technical Context

The SR506 operates as a single-die, unidirectional Schottky rectifier with cathode-band polarity marking and guard-ring overvoltage protection. Its 60V peak reverse voltage rating and 10,000 V/µs dv/dt capability support robust operation in fast-switching topologies.

Thermally, it delivers 35°C/W junction-to-ambient resistance in standard PCB mounting and maintains rated 5A average forward current up to 125°C junction temperature - with derating required above that point per the published forward current derating curve.

Key Specifications

Pinout & Package

DO-201AD axial-leaded package with cathode indicated by a painted band on the body. Leads are pure tin-plated and compliant with J-STD-002 solderability requirements. Polarity-sensitive mounting requires cathode connection to lower potential node.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-50SQ060 and SB560, the SR506 offers optimal balance of DO-201AD form factor, 0.70 V forward drop, and optional AEC-Q101 compliance - making it preferred for space-constrained, thermally demanding, and automotive-grade 5A rectification tasks.

Availability

SR506 is available at Aetrix Electronics and suitable for switching mode power supplies, AC/DC adapters, and DC/DC converters requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle visibility.

Supply support for SR506 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 1992.

The SR506 belongs to TSC's SR5xx Schottky rectifier product line, engineered specifically for high-efficiency, medium-current (3–10A) secondary-side rectification in compact, thermally constrained power systems.

FAQ

What is the maximum junction temperature rating for the SR506?

The SR506 has a maximum junction temperature (T_J) rating of 125°C for the standard version. This value is confirmed in the Absolute Maximum Ratings table and applies under continuous DC operation with appropriate thermal design. Exceeding this limit risks irreversible degradation of the Schottky junction and increased reverse leakage.

Does the SR506 have AEC-Q101 qualification?

The base SR506 is not AEC-Q101 qualified; however, the SR506H variant - explicitly marked with "H" in the ordering code - is fully AEC-Q101 qualified. The qualification covers temperature cycling, humidity bias, and mechanical shock tests required for automotive under-hood applications.

What is the forward voltage of the SR506 at 5A and 100°C junction temperature?

The SR506 datasheet specifies forward voltage only at 25°C (0.70 V max at 5A). At elevated temperatures, V_F decreases - typical curves show ~0.58 V at 100°C and 5A. This reduction improves efficiency in thermally saturated conditions but must be verified using Fig.4 (Typical Forward Characteristics) in the official SR506 datasheet.

Can the SR506 replace the SR505 in an existing design?

Yes, the SR506 can directly replace the SR505 because both share identical DO-201AD packaging, 5A I_F, 120A I_FSM, and same forward voltage spec (0.70 V max). The only difference is V_RRM: SR505 is 50V-rated while SR506 is 60V-rated - offering improved margin against voltage transients without layout changes.

What is the reverse leakage current of the SR506 at rated 60V and 125°C?

The SR506 datasheet does not specify reverse leakage (I_R) at 125°C and 60V. It provides values only at 25°C (500 µA max) and 100°C (10 mA max). At 125°C, leakage increases exponentially; extrapolation suggests ≥20 mA, but actual performance must be validated in-system due to process variation and thermal gradient effects on the Schottky junction.