Taiwan Semiconductor Corporation S1DLH

Overview

S1DLH from Taiwan Semiconductor is a 1A, 200V repetitive peak reverse voltage (V_RRM) standard surface-mount silicon rectifier diode in Sub SMA package, featuring glass passivated junction, 30A peak surge current (I_FSM), and 175°C maximum junction temperature - used in automotive lighting and DC-DC converter output stages.

For engineers reviewing the S1DLH datasheet, S1DLH pinout, S1DLH application, or S1DLH equivalent, key selection criteria include V_RRM = 200 V, I_F = 1 A, V_F ≤ 1.1 V @ 1 A, I_R ≤ 5 µA @ 25°C, and Sub SMA thermal resistance R_θJL = 25°C/W (S1ALH–S1JLH group).

Technical Context

The S1DLH is a single-die, unidirectional standard recovery rectifier with cathode-band polarity marking, designed for low-loss power conversion where fast switching is not required. Its 1800 ns reverse recovery time (t_rr) and 9 pF junction capacitance reflect standard recovery behavior suitable for line-frequency and moderate-speed SMPS applications.

Thermally, it uses a glass-passivated chip mounted in a Sub SMA case rated to 175°C junction temperature, with UL 94V-0 molding compound and matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Key Specifications

Pinout & Package

Package: Sub SMA - Low-profile, surface-mount plastic package with molded body meeting UL 94V-0, matte tin-plated gull-wing leads, and cathode band polarity indicator. Weight: 0.019 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M1020T3G and VS-1EWH02-M3/5AT, the S1DLH uniquely combines AEC-Q101 qualification, Sub SMA compactness, and 25°C/W R_θJL in a cost-optimized standard rectifier - making it preferred for space-constrained automotive and industrial converters where qualification and thermal performance are jointly critical.

Availability

S1DLH is available at Aetrix Electronics and suitable for automotive LED lighting, industrial DC-DC converters, and snubber networks requiring stable component supply, long-lifecycle assurance, and AEC-Q101-compliant sourcing.

Supply support for S1DLH 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 discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and automotive qualification capabilities.

The S1DLH belongs to TSC's S1xLH standard rectifier family, engineered for cost-sensitive, high-reliability power conversion in automotive and industrial environments where robustness, thermal performance, and regulatory compliance are mandatory.

FAQ

What is the peak repetitive reverse voltage rating for S1DLH?

The S1DLH has a peak repetitive reverse voltage (V_RRM) rating of 200 V, verified per Taiwan Semiconductor's official datasheet revision B2108. This rating defines the maximum reverse voltage the diode can block repeatedly without avalanche breakdown under normal operating conditions. It is suitable for circuits with up to 200 V DC bus or 140 V RMS AC inputs. The S1DLH must not be operated beyond this limit to ensure long-term reliability.

Is S1DLH qualified for automotive applications?

Yes, the S1DLH is AEC-Q101 qualified, as explicitly stated in its official datasheet. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and mechanical shock - confirming suitability for automotive subsystems such as LED lighting, body control modules, and infotainment power supplies. The S1DLH's glass passivation and moisture sensitivity level 1 further support robust automotive manufacturing flow compatibility.

What is the forward voltage drop of S1DLH at rated current?

The S1DLH exhibits a maximum forward voltage (V_F) of 1.1 V at 1 A forward current and 25°C junction temperature, per the electrical specifications table in the official datasheet. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating. At higher temperatures or continuous DC operation, V_F decreases slightly due to negative temperature coefficient, but system-level thermal design must account for average conduction loss (~1.1 W at full load).

Does S1DLH have a defined reverse recovery time?

Yes, the S1DLH has a typical reverse recovery time (t_rr) of 1800 ns, measured at I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value confirms its classification as a standard recovery rectifier, appropriate for line-frequency and low-to-moderate frequency (< 50 kHz) switching applications. Faster recovery diodes (e.g., < 500 ns) are not interchangeable without evaluating switching loss and EMI implications.

What package type does S1DLH use and what are its key mechanical features?

The S1DLH uses the Sub SMA package - a low-profile variant of SMA with reduced height and optimized thermal pad geometry. Key mechanical features include UL 94V-0 flammability-rated molding compound, matte tin-plated gull-wing leads compliant with J-STD-002, cathode band polarity marking, and a weight of approximately 0.019 g. Its compact size supports high-density PCB layouts while maintaining 25°C/W junction-to-lead thermal resistance for the S1ALH–S1JLH series.