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

Taiwan Semiconductor Corporation HS2AA

Name: HS2AA
Brand: Taiwan Semiconductor Corporation
SKU: HS2AA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HS2AA

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: HS2AA.pdf

Description:: DIODE GEN PURP 50V 1.5A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:2,681

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Product details

Overview

HS2AA from Taiwan Semiconductor is a 1.5A, 50V repetitive peak reverse voltage (V_RRM) surface-mount fast recovery rectifier in DO-214AC (SMA) package, featuring 50 ns reverse recovery time (t_rr), 1.0 V max forward voltage at 1.5 A, and 5 µA max reverse leakage at 25°C - used in DC-DC converters and snubber circuits.

For engineers reviewing the HS2AA datasheet, HS2AA pinout, HS2AA application, or HS2AA equivalent, key selection criteria include its 50V V_RRM, 50 ns t_rr, DO-214AC thermal resistance (R_θJA = 80°C/W), and suitability for high-frequency switching power supplies requiring low forward drop and fast recovery.

Technical Context

The HS2AA is a single-die, silicon planar junction fast recovery rectifier with glass passivated chip construction, optimized for high-efficiency switching mode power conversion. Its 50 ns reverse recovery time and 1.0 V max forward voltage at rated current support reduced switching losses in high-frequency topologies.

Thermally, it uses a DO-214AC (SMA) package with matte tin-plated leads, JESD201 Class 2 whisker resistance, and UL 94V-0 molding compound. Junction temperature range is –55°C to +150°C, with R_θJA = 80°C/W enabling operation up to 1.5 A continuous under standard PCB layout conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in DC-DC flyback or buck-boost snubber networks.
I_F	1.5 A - Continuous average forward current; supports compact power stages without forced air cooling on standard FR-4.
t_rr	50 ns - Reverse recovery time at I_F = 0.5 A, I_R = 1.0 A; enables stable operation up to ~500 kHz switching frequency.
V_F	≤1.0 V @ 1.5 A, 25°C - Low conduction loss improves efficiency in low-voltage output rails (e.g., 3.3 V, 5 V DC-DC).
I_R	≤5 µA @ 50 V, 25°C - Minimal leakage ensures low standby power in energy-sensitive lighting and adapter designs.
R_θJA	80 °C/W - Junction-to-ambient thermal resistance; requires ≥25 mm² copper pour for full 1.5 A rating at T_A ≤ 70°C.

Pinout & Package

DO-214AC (SMA) package: molded plastic case with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; polarity indicated by single black band at cathode end.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter); must handle 1.5 A continuous and 50 A surge.
Cathode	Forward current exit / reverse blocking terminal	Marked by black band; connects to output rail or snubber network; withstands 50 V reverse bias with <5 µA leakage.

Key Features

Feature	Design Value
Glass passivated junction	Enhances long-term reliability and moisture resistance (MSL Level 1), eliminating need for conformal coating in industrial environments.
Fast recovery (50 ns)	Reduces switching loss and EMI generation compared to standard rectifiers, enabling higher-frequency power stage design.
Low profile DO-214AC (SMA)	0.060 g weight and 2.7 mm height allow use in space-constrained portable and LED driver PCBs.
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive, supporting green manufacturing and export compliance.

Applications

DC-DC Converter	Snubber Circuit
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 3.3–12 V outputs at ≤1.5 A. IC Role / Device Role / Timing Role: Fast recovery rectifier conducting forward current during transformer reset phase; blocks reverse voltage during primary switch conduction. Use Value: 1.0 V V_F minimizes conduction loss; 50 ns t_rr prevents reverse recovery spikes that degrade MOSFET reliability.	Use Scenario: RC snubber across MOSFET or IGBT switches in motor drives and inverters operating at 20–100 kHz. IC Role / Device Role / Timing Role: Freewheeling path for transient energy; clamps voltage overshoot during switch turn-off. Use Value: 50 V V_RRM and 50 A I_FSM safely absorb repetitive surge energy without degradation.
LED Driver	Freewheeling Diode
Use Scenario: Output rectification in constant-current LED drivers for commercial lighting (e.g., T8 tubes, panel lights). IC Role / Device Role / Timing Role: Synchronous or asynchronous rectifier in buck-derived topologies; handles pulsed 1.5 A loads with minimal thermal rise. Use Value: 80°C/W R_θJA and 150°C T_JMAX enable reliable operation on thermally constrained metal-core PCBs.	Use Scenario: Inductive load freewheeling in solenoid drivers, relay interfaces, and automotive body control modules. IC Role / Device Role / Timing Role: Provides low-impedance return path when inductive current collapses after switch deactivation. Use Value: 5 µA max I_R at 25°C ensures negligible standby current; glass passivation prevents corrosion in humid under-hood environments.

DC-DC Converter

Snubber Circuit

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 3.3–12 V outputs at ≤1.5 A.

IC Role / Device Role / Timing Role: Fast recovery rectifier conducting forward current during transformer reset phase; blocks reverse voltage during primary switch conduction.

Use Value: 1.0 V V_F minimizes conduction loss; 50 ns t_rr prevents reverse recovery spikes that degrade MOSFET reliability.

Use Scenario: RC snubber across MOSFET or IGBT switches in motor drives and inverters operating at 20–100 kHz.

IC Role / Device Role / Timing Role: Freewheeling path for transient energy; clamps voltage overshoot during switch turn-off.

Use Value: 50 V V_RRM and 50 A I_FSM safely absorb repetitive surge energy without degradation.

LED Driver

Freewheeling Diode

Use Scenario: Output rectification in constant-current LED drivers for commercial lighting (e.g., T8 tubes, panel lights).

IC Role / Device Role / Timing Role: Synchronous or asynchronous rectifier in buck-derived topologies; handles pulsed 1.5 A loads with minimal thermal rise.

Use Value: 80°C/W R_θJA and 150°C T_JMAX enable reliable operation on thermally constrained metal-core PCBs.

Use Scenario: Inductive load freewheeling in solenoid drivers, relay interfaces, and automotive body control modules.

IC Role / Device Role / Timing Role: Provides low-impedance return path when inductive current collapses after switch deactivation.

Use Value: 5 µA max I_R at 25°C ensures negligible standby current; glass passivation prevents corrosion in humid under-hood environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR105	Same DO-214AC package, 1.0 A rating, 50 V V_RRM, 75 ns t_rr, 1.15 V V_F	Lower current rating limits use to ≤1.0 A designs; slower recovery increases switching loss above 200 kHz.	Select if legacy footprint compatibility is required and peak current stays below 1.0 A.
Vishay VS-1N5817-M3/84	DO-204AL (DO-41) through-hole, 1.0 A, 20 V V_RRM, Schottky architecture, 0.45 V V_F	Not suitable for 50 V blocking; lacks reverse recovery specification due to Schottky nature; incompatible package.	Consider only for low-voltage (<20 V), low-loss applications where through-hole mounting is acceptable.

Compared with MUR105 and VS-1N5817-M3/84, the HS2AA delivers higher current capability (1.5 A vs. 1.0 A), faster recovery (50 ns vs. 75 ns), and precise 50 V V_RRM margin - making it optimal for modern compact SMPS where thermal density and switching frequency are critical.

Availability

HS2AA is available at Aetrix Electronics and suitable for DC-DC converters, snubber circuits, and LED drivers requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for HS2AA 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, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.

The HS2AA belongs to TSC's HS2x series of fast recovery surface-mount rectifiers, engineered specifically for high-frequency switching power supplies where low V_F, fast t_rr, and robust thermal performance are essential.

FAQ

What is the maximum junction temperature rating for HS2AA?

The HS2AA has a maximum junction temperature (T_JMAX) of +150°C, with a storage temperature range of –55°C to +150°C. This allows reliable operation in industrial ambient environments up to 70°C when mounted on ≥25 mm² copper area, leveraging its 80°C/W junction-to-ambient thermal resistance. Derating curves in the HS2AA datasheet confirm 1.5 A continuous current is sustainable at T_A ≤ 70°C.

Is HS2AA compatible with lead-free reflow soldering processes?

Yes, the HS2AA features matte tin-plated leads that meet J-STD-002 solderability requirements and are qualified for lead-free reflow profiles per J-STD-020. Its moisture sensitivity level is rated MSL Level 1, meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly - simplifying SMT line integration.

What does the "AA" suffix indicate in HS2AA?

The "AA" suffix in HS2AA specifies the 50 V repetitive peak reverse voltage (V_RRM) variant within the HS2x family. Per TSC's ordering nomenclature, "x" maps to voltage grade: AA = 50 V, BA = 100 V, DA = 200 V, etc., up to MA = 1000 V. All variants share identical DO-214AC package, 1.5 A I_F, and mechanical construction.

How does HS2AA's reverse recovery time compare to standard PN junction rectifiers?

The HS2AA exhibits a typical reverse recovery time (t_rr) of 50 ns under I_F = 0.5 A, I_R = 1.0 A conditions - significantly faster than general-purpose rectifiers like 1N4007 (≈2–4 µs). This enables efficient operation in switching power supplies above 200 kHz, reducing switching losses and EMI generation while maintaining low forward voltage.

Can HS2AA be used as a freewheeling diode in automotive 12 V systems?

Yes, the HS2AA is suitable as a freewheeling diode in 12 V automotive applications such as solenoid or relay drivers. Its 50 V V_RRM provides adequate margin against load dump transients (up to ±40 V), 5 µA max reverse leakage at 25°C ensures low standby drain, and glass passivation enhances humidity resistance - all validated in TSC's HS2AA qualification testing per AEC-Q101 stress requirements.

HS2AA Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 1.5A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 1.5 A

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

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 50 V

Capacitance @ Vr, F:: 50pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

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

HS2AA FAQ

1.How can I place an order for HS2AA through Aetrix?

Please submit a Request for Quotation (RFQ) for HS2AA 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 HS2AA reliable?

The price and inventory of HS2AA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HS2AA is usually 5 days.

3.What payment methods are accepted for HS2AA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HS2AA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HS2AA?

HS2AA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HS2AA 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 HS2AA?

For technical support, including HS2AA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HS2AA requirements.

6.How does Aetrix verify that HS2AA is sourced from the original manufacturer or authorized distributors?

All HS2AA 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 HS2AA meets industry standards.

7.What is the process for return or replacement of HS2AA?

All HS2AA units undergo pre-shipment inspection (PSI). If there is an issue with HS2AA, 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 HS2AA part is unused and in its original packaging.

Return procedure for HS2AA:

1.Submit a request within 90 days.

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

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