Taiwan Semiconductor Corporation SRS1640H

Overview

SRS1640H from Taiwan Semiconductor is a 16A, 40V Schottky barrier rectifier in TO-263AB (D2PAK) package, AEC-Q101 qualified for automotive use, with 0.55V forward voltage at 8A/25°C, 150A surge capability, and junction temperature rating up to +150°C. It serves as a freewheeling or reverse-battery protection diode in DC/DC converters and car lighting systems.

For engineers reviewing the SRS1640H datasheet, SRS1640H pinout, SRS1640H application, or SRS1640H equivalent, key selection criteria include its 40V V_RRM, dual-die configuration, low thermal resistance (2°C/W), AEC-Q101 qualification, and moisture sensitivity level 1 compliance - all critical for high-reliability 12V/24V automotive power designs.

Technical Context

The SRS1640H integrates two Schottky die in a single TO-263AB (D2PAK) package, enabling dual-diode functionality without external paralleling. Its guard ring structure provides overvoltage protection, and matte tin-plated leads ensure solderability per J-STD-002.

Rated for continuous forward current of 16A at case temperature ≤125°C (derated to zero at 150°C), it delivers low conduction loss with 0.55V V_F at 8A/25°C and maintains <500µA reverse leakage at 40V/25°C - optimized for high-frequency switching in compact DC/DC topologies.

Key Specifications

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount, 3-terminal configuration with anode-cathode-anode (dual common-cathode arrangement confirmed by marking diagram and mechanical data). Cathode tab is electrically connected to pin 2 (center tab), and pins 1 & 3 are anodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-16CTQ040PbF and SB1640, the SRS1640H offers the lowest forward voltage (0.55V), tightest thermal resistance (2°C/W), and full AEC-Q101 compliance - making it optimal for space- and thermal-constrained automotive power stages requiring highest efficiency and qualification assurance.

Availability

SRS1640H is available at Aetrix Electronics and suitable for automotive lighting, DC/DC converter design, and reverse battery protection circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for SRS1640H 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 semiconductor manufacturer specializing in power discrete devices, including Schottky rectifiers, MOSFETs, and TVS diodes, with global distribution and automotive qualification capabilities.

The SRS16xxH series was designed specifically for high-reliability 12V/24V automotive power conversion - emphasizing low V_F, robust surge handling, AEC-Q101 compliance, and TO-263AB manufacturability for automated SMT lines.

FAQ

What is the maximum junction temperature rating for the SRS1640H?

The SRS1640H has a maximum junction temperature (T_J) rating of +150°C, validated per AEC-Q101 stress testing. This allows operation in under-hood environments where ambient temperatures exceed 105°C. Derating begins at 125°C case temperature, reaching zero current capacity at 150°C. The SRS1640H's thermal performance is supported by its 2°C/W junction-to-case resistance and D2PAK package's exposed cathode tab for direct PCB heatsinking.

Is the SRS1640H pin-compatible with other parts in the SRS16xxH family?

Yes, all SRS16xxH variants - including SRS1620H through SRS16100H - share identical TO-263AB (D2PAK) packaging, pinout (anode-cathode-anode), and mechanical dimensions. This enables drop-in voltage-level substitution across the family without PCB layout changes. The SRS1640H uses marking code "SRS1640" and is functionally interchangeable with other members in board-level assembly, provided voltage and thermal requirements align.

Does the SRS1640H have a common-cathode or common-anode configuration?

The SRS1640H features a common-cathode configuration: Pin 2 (center tab) is the shared cathode, while Pins 1 and 3 are independent anodes. This dual-anode arrangement supports parallel operation or separate circuit paths - such as dual-output DC/DC converters or independent freewheeling legs in motor drivers. The marking diagram and mechanical outline confirm this topology, and the device's dual-die construction is explicitly stated in the KEY PARAMETERS section.

What is the reverse leakage current specification for the SRS1640H at elevated temperature?

At rated 40V reverse voltage and junction temperature of 100°C, the SRS1640H exhibits a maximum reverse leakage current (I_R) of 15 mA per diode. At 25°C and 40V, leakage is limited to 500 µA max. These values are measured under standardized pulse conditions (30 ms PW) and reflect real-world behavior in automotive environments where thermal stress increases leakage - critical for low-power standby circuits and reverse-battery protection integrity.

How does the guard ring feature improve reliability in automotive applications?

The guard ring in the SRS1640H enhances edge termination robustness, suppressing premature avalanche breakdown during voltage transients like ISO 7637-2 load dump pulses. This structural feature increases the device's ability to withstand repetitive overvoltage stress without degradation - directly supporting AEC-Q101 qualification requirements for automotive power rectifiers. In practice, it extends field lifetime in 12V systems exposed to alternator regulation faults or jump-start events.