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

Taiwan Semiconductor Corporation HS2DAF-T

Name: HS2DAF-T
Brand: Taiwan Semiconductor Corporation
SKU: HS2DAF-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HS2DAF-T

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-221AC, SMA Flat Leads

Datasheet:: HS2DAF-T.pdf

Description:: 50NS, 2A, 200V, HIGH EFFICIENT R

Quantity:: RFQ Add To RFQ list

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Inventory:7,500

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Product details

Overview

HS2DAF-T from Taiwan Semiconductor is a 2A, 200V surface-mount high-efficiency rectifier diode in SMAF package, featuring glass-passivated junction, low reverse leakage (≤5 µA at 25°C), and fast reverse recovery time (≤50 ns). It serves as a freewheeling or output rectifier in DC-DC converters and switching-mode inverters operating up to 150°C junction temperature.

For engineers reviewing the HS2DAF-T datasheet, HS2DAF-T pinout, HS2DAF-T application, or HS2DAF-T equivalent, key selection criteria include its 200V V_RRM, 50A I_FSM surge rating, 0.91V forward voltage at 2A/25°C, thermal resistance R_θJA = 89°C/W, and RoHS/halogen-free compliance for industrial power conversion designs.

Technical Context

The HS2DAF-T is a single-die, unidirectional silicon rectifier optimized for high-frequency switching applications. Its glass-passivated junction ensures stable reverse characteristics and low IR drift over temperature, while the SMAF package supports automated placement and meets J-STD-020 moisture sensitivity level 1.

Electrical behavior is defined by tight forward voltage control (0.84V typ. @1A/25°C), low junction capacitance (27 pF @1MHz/4V), and fast recovery (≤50 ns) - enabling efficient operation in SMPS topologies where conduction loss and switching loss trade-offs are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for circuit blocking capability in 200V-rated systems.
I_F	2 A - Continuous average forward current; defines steady-state power handling in thermally managed PCB layouts.
I_FSM	50 A - Non-repetitive surge current (8.3 ms half-sine); supports inrush and fault-current tolerance in converter startup or overload.
V_F	0.91 V max @ 2A/25°C - Forward voltage drop directly impacts conduction loss and thermal rise in high-duty-cycle rectification.
t_rr	50 ns max - Reverse recovery time determines switching loss and EMI generation during turn-off in high-frequency SMPS.
R_θJA	89 °C/W - Junction-to-ambient thermal resistance on 5 mm × 5 mm Cu pad; used to calculate max ambient temperature for 150°C T_J limit.
C_J	27 pF @ 1 MHz / 4 V - Junction capacitance affects high-frequency noise coupling and snubber design in resonant or ZVS circuits.

Pinout & Package

Package: SMAF (Surface Mount Axial Flat), JEDEC DO-221AC compliant, matte tin-plated leads, cathode indicated by band. Weight: 0.035 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., switch node in buck sync rectifier or transformer secondary center-tap).
Cathode	Forward current exit / reverse blocking terminal	Connected to output rail or higher-potential node; polarity band identifies this terminal for correct PCB orientation.

Key Features

Feature	Design Value
Glass-passivated junction	Enables stable reverse leakage (<5 µA @25°C) and long-term reliability under humidity and thermal cycling stress.
Moisture sensitivity level 1	Eliminates bake requirements prior to reflow, supporting direct SMT assembly without preconditioning delays.
UL 94V-0 molding compound	Meets flame-retardancy safety standards for enclosed industrial and telecom power supplies.
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS directives, enabling use in eco-sensitive consumer and medical-adjacent equipment.

Applications

DC-DC Converter Output Rectification	Switching Mode Inverter Freewheeling
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 12–48 V outputs at up to 2 A. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output. Use Value: Low V_F (0.91 V max) minimizes conduction loss; fast t_rr (≤50 ns) reduces switching loss and improves efficiency above 100 kHz.	Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss return path for inductive current decay during high-side switch off-time. Use Value: 50 A I_FSM withstands transient energy spikes; 150°C T_JMAX supports operation in thermally constrained enclosures.
Industrial SMPS Input Stage	Telecom Power Supply Clamp
Use Scenario: Input bridge rectification or PFC stage in compact 200V-input industrial SMPS units. IC Role / Device Role / Timing Role: High-voltage, high-current rectifier handling line-frequency or high-frequency AC input waveforms. Use Value: 200V V_RRM provides sufficient margin over 200VAC RMS (≈283V peak); low IR ensures minimal standby loss.	Use Scenario: Transient voltage clamp or hold-up rectifier in 48 V telecom power distribution boards. IC Role / Device Role / Timing Role: Blocks reverse current while clamping inductive kickback or ESD transients on DC bus lines. Use Value: 27 pF C_J limits capacitive loading on sensitive control rails; UL 94V-0 package enhances system-level fire safety.

DC-DC Converter Output Rectification

Switching Mode Inverter Freewheeling

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 12–48 V outputs at up to 2 A.

IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: Low V_F (0.91 V max) minimizes conduction loss; fast t_rr (≤50 ns) reduces switching loss and improves efficiency above 100 kHz.

Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters.

IC Role / Device Role / Timing Role: Provides low-loss return path for inductive current decay during high-side switch off-time.

Use Value: 50 A I_FSM withstands transient energy spikes; 150°C T_JMAX supports operation in thermally constrained enclosures.

Industrial SMPS Input Stage

Telecom Power Supply Clamp

Use Scenario: Input bridge rectification or PFC stage in compact 200V-input industrial SMPS units.

IC Role / Device Role / Timing Role: High-voltage, high-current rectifier handling line-frequency or high-frequency AC input waveforms.

Use Value: 200V V_RRM provides sufficient margin over 200VAC RMS (≈283V peak); low IR ensures minimal standby loss.

Use Scenario: Transient voltage clamp or hold-up rectifier in 48 V telecom power distribution boards.

IC Role / Device Role / Timing Role: Blocks reverse current while clamping inductive kickback or ESD transients on DC bus lines.

Use Value: 27 pF C_J limits capacitive loading on sensitive control rails; UL 94V-0 package enhances system-level fire safety.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-efficiency rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R02FL	2A/200V, TO-277 package, t_rr = 35 ns, V_F = 0.95 V @2A/25°C, R_θJA = 70°C/W	Lower thermal resistance but larger footprint; requires different pad layout and reflow profile.	Preferred when board space allows and lower thermal resistance is prioritized over SMT density.
ON Semi MUR220SFT1G	2A/200V, SMAF package, t_rr = 35 ns, V_F = 0.92 V @2A/25°C, IR = 5 µA @25°C	Near-identical package and electrical specs; slightly faster recovery and tighter V_F distribution.	Suitable for drop-in replacement where faster recovery and tighter parametric consistency are required.

Compared with STTH2R02FL and MUR220SFT1G, the HS2DAF-T offers identical SMAF packaging and 200V/2A ratings but trades slightly slower recovery (50 ns vs. 35 ns) for broader supply chain availability and halogen-free compliance per IEC 61249-2-21.

Availability

HS2DAF-T is available at Aetrix Electronics and suitable for DC-DC converters, switching-mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for HS2DAF-T 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with ISO/TS 16949 and IATF 16949 certification.

The HS2DAF-T belongs to TSC's HS2xAF-T high-efficiency rectifier family, designed specifically for high-frequency, surface-mount power conversion systems demanding low V_F, fast t_rr, and robust thermal performance in compact form factors.

FAQ

What is the maximum junction temperature rating for HS2DAF-T?

The HS2DAF-T has a maximum junction temperature (T_JMAX) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet revision B2103. This rating enables reliable operation in high-temperature environments such as enclosed industrial power supplies or automotive under-hood auxiliary converters, provided thermal design maintains junction temperature within this limit using the specified R_θJA = 89°C/W on a 5 mm × 5 mm copper pad.

Does HS2DAF-T support lead-free reflow soldering?

Yes, the HS2DAF-T supports lead-free reflow soldering per J-STD-002. Its matte tin-plated leads are fully compatible with standard Pb-free reflow profiles (peak temperature ≤260°C), and its moisture sensitivity level 1 classification eliminates the need for pre-bake conditioning - enabling direct placement and reflow without process modification.

What is the reverse recovery time (t_rr) specification for HS2DAF-T?

The HS2DAF-T has a maximum reverse recovery time (t_rr) of 50 ns under test conditions of I_F = 0.5 A, I_R = 1.0 A, and I_RR = 0.25 A, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This value is measured at T_A = 25°C and confirms suitability for high-frequency switching applications up to several hundred kHz.

Is HS2DAF-T halogen-free and RoHS compliant?

Yes, the HS2DAF-T is both RoHS compliant and halogen-free in accordance with IEC 61249-2-21. The molding compound contains no brominated or chlorinated flame retardants, and all homogeneous materials meet EU Directive 2011/65/EU requirements. This makes HS2DAF-T suitable for environmentally regulated end equipment including consumer electronics and industrial automation systems.

What does the "AF" marking code indicate on HS2DAF-T?

The "AF" in the HS2DAF-T marking code identifies the device as part of Taiwan Semiconductor's high-efficiency rectifier series with glass-passivated junction and SMAF package. Specifically, "HS2D" denotes the 200V variant, "AF" indicates the standard performance grade (as opposed to "AG" or "AJ"), and "-T" signifies tape-and-reel packaging (7,500 units per reel). The full top-side marking is "HS2DAF".

HS2DAF-T 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 V @ 2 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 200 V

Capacitance @ Vr, F:: 27pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMAF

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

HS2DAF-T FAQ

1.How can I place an order for HS2DAF-T through Aetrix?

Please submit a Request for Quotation (RFQ) for HS2DAF-T 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 HS2DAF-T reliable?

The price and inventory of HS2DAF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HS2DAF-T is usually 5 days.

3.What payment methods are accepted for HS2DAF-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HS2DAF-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HS2DAF-T?

HS2DAF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HS2DAF-T 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 HS2DAF-T?

For technical support, including HS2DAF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HS2DAF-T requirements.

6.How does Aetrix verify that HS2DAF-T is sourced from the original manufacturer or authorized distributors?

All HS2DAF-T 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 HS2DAF-T meets industry standards.

7.What is the process for return or replacement of HS2DAF-T?

All HS2DAF-T units undergo pre-shipment inspection (PSI). If there is an issue with HS2DAF-T, 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 HS2DAF-T part is unused and in its original packaging.

Return procedure for HS2DAF-T:

1.Submit a request within 90 days.

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

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