Taiwan Semiconductor Corporation S4DH

Overview

S4DH from Taiwan Semiconductor is a 4A, 200V surface-mount silicon rectifier diode in DO-214AB (SMC) package, featuring glass-passivated junction, AEC-Q101 qualification, 100A peak surge current rating, and 1.15V max forward voltage at 4A/25°C - used in automotive DC-DC converters and snubber circuits.

For engineers reviewing the S4DH datasheet, S4DH pinout, S4DH application, or S4DH equivalent, key selection criteria include repetitive peak reverse voltage (200V), thermal resistance (13°C/W junction-to-lead), moisture sensitivity level (J-STD-020 Level 1), RoHS/halogen-free compliance, and automotive-grade reliability per AEC-Q101.

Technical Context

The S4DH operates as a single-die standard recovery rectifier with 200V V_RRM, 4A average forward current, and 1500ns reverse recovery time under IF = 0.5A / IR = 1.0A / Irr = 0.25A conditions. Its glass-passivated junction ensures stable performance across -55°C to +150°C junction temperature range.

Thermal design is supported by R_θJL = 13°C/W and R_θJA = 47°C/W ratings, while the DO-214AB (SMC) package enables automated placement and meets UL 94V-0 flammability and JESD 201 Class 2 whisker resistance requirements.

Key Specifications

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicating band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance; weight ≈0.210g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH4L02 and VS-4EWH02-M3, the S4DH delivers balanced trade-offs between forward loss, recovery behavior, and automotive qualification - making it especially appropriate for cost-sensitive, thermally constrained, and AEC-Q101–mandated applications where moderate switching frequency suffices.

Availability

S4DH is available at Aetrix Electronics and suitable for automotive lighting, DC-DC converter designs, and snubber circuits requiring stable component supply, long-term lifecycle assurance, and AEC-Q101–compliant sourcing.

Supply support for S4DH 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 automotive, industrial, and consumer markets since 1979.

The S4DH belongs to TSC's AEC-Q101–qualified S4xH rectifier family, engineered specifically for robust, high-reliability surface-mount rectification in harsh-environment automotive power systems.

FAQ

What is the peak repetitive reverse voltage rating for the S4DH?

The S4DH has a peak repetitive reverse voltage (V_RRM) rating of 200 V. This value is defined per the manufacturer's absolute maximum ratings table and represents the maximum allowable reverse-biased voltage the device can withstand repeatedly without breakdown. It is confirmed in the "ABSOLUTE MAXIMUM RATINGS" section of the S4AH–S4MH datasheet, Version A2102, where S4DH corresponds to the "x = D" variant.

Is the S4DH suitable for automotive applications?

Yes, the S4DH is explicitly AEC-Q101 qualified, as stated in the FEATURES section of its datasheet. This qualification validates its reliability for automotive use cases including under-hood environments, lighting systems, and power conversion modules. The device's -55°C to +150°C junction temperature range, moisture sensitivity level 1, and halogen-free construction further support its deployment in automotive electronics per S4DH specifications.

What package type does the S4DH use, and what are its key mechanical attributes?

The S4DH uses the DO-214AB (SMC) surface-mount package. Key mechanical attributes include matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flammability-rated molding compound, JESD 201 Class 2 whisker resistance, and cathode polarity indicated by a visible band. Its approximate weight is 0.210 g, and it supports automated placement per the S4DH datasheet.

What is the maximum forward voltage drop of the S4DH at rated current?

The S4DH has a maximum forward voltage drop (V_F) of 1.15 V at 4 A forward current and 25°C junction temperature, as specified in the ELECTRICAL SPECIFICATIONS table. This value is measured under pulsed conditions (PW = 0.3 ms) and directly impacts conduction loss and thermal design in applications such as DC-DC converters and LED drivers using the S4DH.

Does the S4DH have a specified reverse recovery time, and how is it measured?

Yes, the S4DH has a typical reverse recovery time (t_rr) of 1500 ns. It is measured under the conditions: forward current I_F = 0.5 A, reverse current I_R = 1.0 A, and reverse recovery current I_rr = 0.25 A - per the ELECTRICAL SPECIFICATIONS table. This parameter is critical for snubber and moderate-frequency rectification applications where controlled turn-off behavior is required, as confirmed in the S4DH datasheet.