Taiwan Semiconductor Corporation SR1620PT

Overview

SR1620PT from Taiwan Semiconductor is a 16A, 20V repetitive peak reverse voltage Schottky barrier rectifier in TO-247AD (TO-3P) package, featuring 0.55V forward voltage at 8A/25°C, 200A surge capability, and AEC-Q101 qualification option. It serves as a high-efficiency output rectifier in low-voltage DC-DC converters and SMPS for consumer power adapters.

For engineers reviewing the SR1620PT datasheet, SR1620PT pinout, SR1620PT application, or SR1620PT equivalent, key selection criteria include its 20V V_RRM, dual-die configuration, 3°C/W junction-to-case thermal resistance, and UL Recognized status (E-326243) for safety-critical power designs.

Technical Context

This Schottky rectifier uses a dual-die construction in a single TO-247AD package to support parallel conduction paths while maintaining low forward voltage drop. Its guard ring structure provides overvoltage protection, and matte tin-plated leads meet J-STD-002 solderability standards.

The device operates with a maximum junction temperature of 125°C (derated above 25°C ambient), exhibits 500µA reverse leakage at 25°C and rated VR, and delivers stable performance across -55°C to +125°C storage range per JESD201 Class 2 whisker testing.

Key Specifications

Pinout & Package

Package: TO-247AD (TO-3P) - Isolated case, 3-terminal through-hole package with center anode/cathode configuration and mechanical mounting hole; 5.60g mass; UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-16CTH02-M3, SR1620PT offers superior thermal performance (3 vs. 5.5°C/W) and AEC-Q101 readiness; versus MUR1620CT, it delivers 50% lower forward loss but trades off reverse voltage headroom - making SR1620PT optimal for 20V-class high-efficiency power conversion.

Availability

SR1620PT is available at Aetrix Electronics and suitable for power adapters, monitor SMPS, and DC-DC converters requiring stable component supply, long-term lifecycle assurance, and RoHS/halogen-free compliance.

Supply support for SR1620PT 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, automotive, and industrial markets since 1979.

The SR series Schottky rectifiers are engineered for high-efficiency, high-reliability secondary-side rectification in consumer and industrial switch-mode power supplies, emphasizing low V_F, rugged surge handling, and safety-certified packaging.

FAQ

What is the maximum junction temperature rating for SR1620PT?

The SR1620PT has a maximum junction temperature (T_J) rating of +125°C under continuous operation. This value is specified in the Absolute Maximum Ratings table and defines the upper thermal limit before derating begins. Operation beyond this temperature risks permanent parametric shift or failure. The SR1620PT datasheet provides a forward current derating curve referenced to case temperature, which must be used alongside its 3°C/W R_θJC to ensure safe thermal design in the target application.

Is SR1620PT pin-compatible with SR1620PTH?

Yes, SR1620PT and SR1620PTH share identical TO-247AD (TO-3P) mechanical dimensions, pinout, and electrical specifications - the only difference is that SR1620PTH is AEC-Q101 qualified for automotive use, while SR1620PT is the standard industrial-grade version. Both parts use the same marking code "SR1620PT" on the device body and require identical PCB layout and heatsink mounting. No redesign or requalification is needed when upgrading from SR1620PT to SR1620PTH in existing systems.

What does the "PT" suffix indicate in SR1620PT?

The "PT" suffix in SR1620PT denotes Taiwan Semiconductor's standard plastic TO-247AD (TO-3P) package variant with matte tin-plated leads, UL 94V-0 molding compound, and JESD201 Class 2 whisker resistance. It distinguishes this version from alternate packages such as surface-mount or tape-and-reel variants (e.g., SR1620PTH uses same "PT" suffix but adds "H" for AEC-Q101). The "PT" does not imply lead-free or halogen-free status - those are confirmed separately via RoHS and IEC 61249-2-21 compliance statements in the datasheet.

How is the dual-die configuration implemented in SR1620PT?

The SR1620PT integrates two independent Schottky die in a single TO-247AD package wired in parallel between the anode and cathode terminals. This architecture doubles the effective active area versus a single-die device, reducing forward voltage drop and spreading thermal load across the die surface. Electrical testing confirms matched V_F and I_R characteristics between dies, ensuring balanced current sharing without external balancing components - a key advantage over discrete dual-diode solutions requiring careful layout and matching.

Does SR1620PT require a heatsink in typical 16A operation?

Yes, SR1620PT requires a heatsink for reliable 16A continuous operation. With a junction-to-case thermal resistance of 3°C/W and a maximum T_J of 125°C, even at 25°C ambient, power dissipation of ~8.8W (16A × 0.55V) would raise the junction temperature to ~102°C - approaching the limit. Real-world ambient temperatures (e.g., 50–70°C inside enclosed adapters) necessitate heatsinking to maintain safe margins. The TO-247AD tab is electrically connected to the cathode and must be isolated from chassis ground unless circuit topology permits direct thermal coupling.