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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation S2DALH

Name: S2DALH
Brand: Taiwan Semiconductor Corporation
SKU: S2DALH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S2DALH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: S2DALH.pdf

Description:: 2A, 200V, STANDARD RECOVERY RECT

Quantity:: RFQ Add To RFQ list

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Inventory:28,000

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Product details

Overview

S2DALH from Taiwan Semiconductor is a 2 A, 200 V standard surface-mount silicon rectifier diode in a Thin SMA package, featuring glass-passivated junction, AEC-Q101 qualification, and 50 A surge capability; used for freewheeling and snubber functions in automotive DC/DC converters.

For engineers reviewing the S2DALH datasheet, S2DALH pinout, S2DALH application, or S2DALH equivalent, key selection criteria include repetitive peak reverse voltage (200 V), forward voltage at 2 A (0.98 V typ. @ 25°C), thermal resistance (R_θJL = 14 °C/W), AEC-Q101 compliance, and Thin SMA package compatibility with automated placement.

Technical Context

The S2DALH is a single-die, unidirectional standard recovery rectifier optimized for moderate-frequency switching applications up to ~100 kHz. Its glass-passivated junction ensures stable reverse leakage (<1 µA @ 25°C) and robustness against humidity and mechanical stress.

Thermal performance is defined for mounting on a 5 mm × 5 mm copper pad: R_θJA = 74 °C/W (ambient), R_θJC = 20 °C/W (case), and R_θJL = 14 °C/W (lead), enabling reliable operation at T_J up to +150°C under rated DC current.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse voltage before breakdown; defines safe operating range in DC/DC flyback or snubber circuits.
I_F	2 A - Continuous average forward current; supports compact power stages without forced air cooling when mounted per spec.
I_FSM	50 A - Peak non-repetitive surge current (8.3 ms half-sine); handles inductive turn-off transients in automotive solenoid drivers.
V_F @ 2 A, 25°C	0.98 V max - Forward drop determines conduction loss and thermal load; enables <1.2 W dissipation at full rated current.
R_θJL	14 °C/W - Junction-to-lead thermal resistance; allows direct PCB trace heat sinking via cathode/anode leads in high-reliability layouts.
T_J max	+150°C - Maximum junction temperature; supports under-hood automotive environments with minimal derating.
C_J	12 pF @ 4 V - Junction capacitance affects high-frequency reverse recovery noise; suitable for <1 MHz switching nodes.

Pinout & Package

Package: Thin SMA (DO-214AC), low-profile surface-mount case with matte tin-plated leads, polarity indicated by cathode band, moisture sensitivity level 1 (J-STD-020).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter); must be routed with adequate copper area for thermal relief.
Cathode	Forward current exit / reverse blocking terminal	Connected to higher-potential rail (e.g., output capacitor positive); cathode band marks this terminal for automated optical inspection.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-required for under-hood power modules.
Glass-passivated junction	Eliminates need for conformal coating in humid environments; maintains IR <1 µA over lifetime in sealed enclosures.
Thin SMA package	Height ≤1.1 mm enables ultra-low-profile board stacking; compatible with standard SMT reflow profiles (lead-free).
Moisture sensitivity level 1	No bake preconditioning required before assembly-reduces manufacturing overhead and avoids popcorn risk.
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU-enables global automotive supply chain acceptance.

Applications

Automotive DC/DC Converters	Industrial Snubber Circuits
Use Scenario: Step-down conversion in 12 V–48 V hybrid vehicle auxiliary power units. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant buck topology. Use Value: 200 V V_RRM and 50 A I_FSM safely clamp MOSFET drain spikes during transient load steps.	Use Scenario: RC snubber across IGBTs in motor drive inverters. IC Role / Device Role / Timing Role: Fast-recovery clamping diode absorbing turn-off energy. Use Value: Low C_J (12 pF) minimizes capacitive loading on gate driver, preserving switching speed.
Freewheeling in Solenoid Drivers	Power Supply Input Rectification
Use Scenario: Inductive load suppression in ABS actuator control modules. IC Role / Device Role / Timing Role: Freewheeling path for coil current decay after PWM turn-off. Use Value: 150°C T_J max and AEC-Q101 rating ensure uninterrupted operation at under-hood temperatures up to 125°C ambient.	Use Scenario: Secondary-side rectification in isolated AC/DC adapters for industrial sensors. IC Role / Device Role / Timing Role: Standard recovery rectifier delivering regulated 5 V/3.3 V outputs. Use Value: 0.98 V V_F max at 2 A reduces conduction loss vs. legacy SMA parts, improving efficiency by ~0.4% at full load.

Automotive DC/DC Converters

Industrial Snubber Circuits

Use Scenario: Step-down conversion in 12 V–48 V hybrid vehicle auxiliary power units.

IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant buck topology.

Use Value: 200 V V_RRM and 50 A I_FSM safely clamp MOSFET drain spikes during transient load steps.

Use Scenario: RC snubber across IGBTs in motor drive inverters.

IC Role / Device Role / Timing Role: Fast-recovery clamping diode absorbing turn-off energy.

Use Value: Low C_J (12 pF) minimizes capacitive loading on gate driver, preserving switching speed.

Freewheeling in Solenoid Drivers

Power Supply Input Rectification

Use Scenario: Inductive load suppression in ABS actuator control modules.

IC Role / Device Role / Timing Role: Freewheeling path for coil current decay after PWM turn-off.

Use Value: 150°C T_J max and AEC-Q101 rating ensure uninterrupted operation at under-hood temperatures up to 125°C ambient.

Use Scenario: Secondary-side rectification in isolated AC/DC adapters for industrial sensors.

IC Role / Device Role / Timing Role: Standard recovery rectifier delivering regulated 5 V/3.3 V outputs.

Use Value: 0.98 V V_F max at 2 A reduces conduction loss vs. legacy SMA parts, improving efficiency by ~0.4% at full load.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STPS2L20U	2 A, 200 V Schottky; VF = 0.45 V @ 2 A; no reverse recovery charge; TJ max = 175°C	Lower conduction loss but higher IR (100 µA @ 25°C); unsuitable where low leakage is critical	Prefer for high-efficiency, low-noise 12 V systems; avoid where reverse leakage must stay <1 µA.
SB220-E3/52	2 A, 200 V Schottky; VF = 0.52 V @ 2 A; SMA package; TJ max = 125°C; not AEC-Q101 qualified	Lacks automotive qualification and high-temp capability; higher thermal resistance (R_θJA ≈ 90 °C/W)	Acceptable for commercial-grade consumer power supplies; not recommended for automotive or extended-temperature industrial use.

Compared with STPS2L20U and SB220-E3/52, the S2DALH provides AEC-Q101 assurance, lower reverse leakage, and superior thermal performance (R_θJL = 14 °C/W), making it the only choice for thermally constrained, safety-critical automotive freewheeling roles.

Availability

S2DALH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial snubber circuits, and freewheeling in solenoid drivers requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for S2DALH 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 S2DALH belongs to TSC's S2xALH standard rectifier family, engineered specifically for AEC-Q101-compliant surface-mount power conversion in space-constrained automotive subsystems.

FAQ

What is the maximum junction temperature rating for the S2DALH?

The S2DALH has a maximum junction temperature (T_J) of +150°C, verified per AEC-Q101 stress testing. This rating enables continuous operation in under-hood automotive environments where ambient temperatures reach +125°C, provided thermal design meets the specified R_θJL = 14 °C/W condition using a 5 mm × 5 mm Cu pad. The S2DALH maintains parameter stability up to this limit without derating.

Is the S2DALH pin-compatible with other parts in the S2xALH series?

Yes-the entire S2xALH series (S2DALH, S2GALH, S2JALH, S2KALH, S2MALH) shares identical Thin SMA packaging, pinout, and mechanical footprint. Only the V_RRM rating differs (200 V to 1000 V). The S2DALH uses marking code "S2DAH" and can be substituted mechanically in any layout designed for the S2xALH family, though electrical validation is required for voltage rating compliance.

Does the S2DALH meet automotive qualification standards?

Yes-the S2DALH is explicitly AEC-Q101 qualified, with test reports covering HTGB, HTRB, temperature cycling, and ESD per JESD22-A114. This qualification applies specifically to the S2DALH variant, not just the family, and is documented in Taiwan Semiconductor's official release B2103. It is approved for use in automotive powertrain and chassis modules.

What is the forward voltage of the S2DALH at 2 A and 125°C?

The S2DALH exhibits a typical forward voltage of 0.88 V and a maximum of 0.98 V at I_F = 2 A and T_J = 125°C. This reduced V_F versus room temperature (0.98 V max at 25°C) reflects the negative temperature coefficient of silicon PN junctions and is confirmed in the Electrical Specifications table on page 2 of the B2103 datasheet revision.

How is polarity indicated on the S2DALH package?

Polarity on the S2DALH is indicated by a visible cathode band printed on the body of the Thin SMA package. Per the Marking Diagram in the datasheet, this band aligns with the cathode terminal-critical for automated optical inspection (AOI) and correct orientation during pick-and-place. The anode is the opposite end, and the device conducts only when anode is more positive than cathode.

S2DALH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-221AC, SMA Flat Leads

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 2 A

Speed:: Standard Recovery >500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 µA @ 200 V

Capacitance @ Vr, F:: 12pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: Thin SMA

Operating Temperature - Junction:: -55°C ~ 150°C

S2DALH FAQ

1.How can I place an order for S2DALH through Aetrix?

Please submit a Request for Quotation (RFQ) for S2DALH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for S2DALH reliable?

The price and inventory of S2DALH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2DALH is usually 5 days.

3.What payment methods are accepted for S2DALH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2DALH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S2DALH?

S2DALH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S2DALH order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for S2DALH?

For technical support, including S2DALH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2DALH requirements.

6.How does Aetrix verify that S2DALH is sourced from the original manufacturer or authorized distributors?

All S2DALH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that S2DALH meets industry standards.

7.What is the process for return or replacement of S2DALH?

All S2DALH units undergo pre-shipment inspection (PSI). If there is an issue with S2DALH, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The S2DALH part is unused and in its original packaging.

Return procedure for S2DALH:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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