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

Taiwan Semiconductor Corporation S2AA

Name: S2AA
Brand: Taiwan Semiconductor Corporation
SKU: S2AA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S2AA

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: S2AA.pdf

Description:: DIODE GEN PURP 50V 1.5A DO214AC

Quantity:: RFQ Add To RFQ list

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Inventory:2,415

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Product details

Overview

S2AA from Taiwan Semiconductor is a 50 V repetitive peak reverse voltage, 1.5 A average forward current surface-mount silicon rectifier diode in DO-214AC (SMA) package, featuring 1.1 V max forward voltage at 1.5 A and 5 µA max reverse leakage at 25°C - used in DC-DC converter output stages and snubber networks.

For engineers reviewing the S2AA datasheet, S2AA pinout, S2AA application, or S2AA equivalent, key selection criteria include its 50 V V_RRM, 50 A I_FSM, 150 °C T_J_MAX, glass-passivated junction, and J-STD-020 Level 1 moisture sensitivity rating for high-reliability automated assembly.

Technical Context

The S2AA is a single-die, standard recovery rectifier with 1500 ns reverse recovery time under IF = 0.5 A / IR = 1.0 A conditions and 30 pF junction capacitance at 1 MHz and 4 V reverse bias. Its thermal resistance is 16 °C/W (junction-to-lead) and 53 °C/W (junction-to-ambient).

Designed for general-purpose switching-mode power conversion, it operates across -55 °C to +150 °C junction temperature range, with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - maximum repetitive reverse voltage before breakdown; defines safe operating limit in DC-DC flyback or boost output rectification
I_F	1.5 A - continuous average forward current; determines thermal derating in PCB-constrained layouts
I_FSM	50 A - non-repetitive surge capability (8.3 ms half-sine); supports inrush and transient overload handling
V_F (max)	1.1 V @ 1.5 A - forward drop directly impacts conduction loss and efficiency in low-voltage output rails
I_R (max)	5 µA @ 25°C - low leakage ensures minimal standby power loss in high-impedance hold-up circuits
t_rr	1500 ns - standard recovery speed suitable for ≤100 kHz switching frequencies in SMPS designs
R_θJL	16 °C/W - enables direct thermal path to PCB copper; critical for compact layout without heatsinking

Pinout & Package

Package: DO-214AC (SMA), surface-mount, cathode-indicated by band, matte tin-plated leads, UL 94V-0 molding compound, 0.060 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., transformer secondary center-tap or switch node)
Cathode	Forward current exit point	Connected to output rail or filter capacitor; marked by visible band on body

Key Features

Feature	Design Value
Glass passivated junction	Enhances long-term reliability and humidity resistance in unsealed industrial environments
Low V_F (1.1 V max)	Reduces conduction losses by ~15% vs. comparable 1N400x series at 1.5 A load
J-STD-020 Level 1 MSL	Enables unlimited floor life and reflow compatibility without baking prior to assembly
RoHS & halogen-free	Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green electronics manufacturing
50 A I_FSM	Withstands >3× rated current surges, supporting robust startup and fault tolerance in AC-input rectifiers

Applications

DC-DC Converter Output Rectification	Snubber Network Clamping
Use Scenario: Rectifying switched transformer output in isolated 5–24 V DC-DC converters. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC to regulated DC output. Use Value: 1.1 V V_F minimizes conduction loss at 1.5 A, improving efficiency over legacy 1N5822 in same footprint.	Use Scenario: Absorbing voltage spikes across MOSFETs or IGBTs in flyback or resonant converters. IC Role / Device Role / Timing Role: Clamp diode in RCD snubber network limiting dv/dt stress. Use Value: 50 V V_RRM and 50 A I_FSM provide margin for transient clamping without avalanche degradation.
Lighting Driver Secondary Side	General-Purpose AC Line Rectification
Use Scenario: Output rectification in LED driver power supplies with <12 V output. IC Role / Device Role / Timing Role: Low-loss secondary-side rectifier delivering stable current to LED strings. Use Value: Glass passivation and 150 °C T_J_MAX ensure reliability in thermally dense LED housing environments.	Use Scenario: Input bridge or half-wave rectification in low-power wall adapters and auxiliary supplies. IC Role / Device Role / Timing Role: General-purpose silicon rectifier replacing 1N4001–1N4007 in cost-sensitive designs. Use Value: DO-214AC package offers superior thermal performance and automated placement compatibility vs. axial DO-41.

DC-DC Converter Output Rectification

Snubber Network Clamping

Use Scenario: Rectifying switched transformer output in isolated 5–24 V DC-DC converters.

IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC to regulated DC output.

Use Value: 1.1 V V_F minimizes conduction loss at 1.5 A, improving efficiency over legacy 1N5822 in same footprint.

Use Scenario: Absorbing voltage spikes across MOSFETs or IGBTs in flyback or resonant converters.

IC Role / Device Role / Timing Role: Clamp diode in RCD snubber network limiting dv/dt stress.

Use Value: 50 V V_RRM and 50 A I_FSM provide margin for transient clamping without avalanche degradation.

Lighting Driver Secondary Side

General-Purpose AC Line Rectification

Use Scenario: Output rectification in LED driver power supplies with <12 V output.

IC Role / Device Role / Timing Role: Low-loss secondary-side rectifier delivering stable current to LED strings.

Use Value: Glass passivation and 150 °C T_J_MAX ensure reliability in thermally dense LED housing environments.

Use Scenario: Input bridge or half-wave rectification in low-power wall adapters and auxiliary supplies.

IC Role / Device Role / Timing Role: General-purpose silicon rectifier replacing 1N4001–1N4007 in cost-sensitive designs.

Use Value: DO-214AC package offers superior thermal performance and automated placement compatibility vs. axial DO-41.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR105	Ultrafast recovery (75 ns), higher V_F (1.3 V), same DO-214AC package	Better suited for >100 kHz SMPS where trr dominates loss	Select S2AA when cost, thermal robustness, and standard recovery are prioritized over speed
Vishay VS-1N4001TR	Lower I_F (1.0 A), higher V_F (1.1 V typ), DO-41 axial package	Limited to through-hole assembly; not suitable for high-density SMT layouts	Choose S2AA for surface-mount production, higher surge rating, and improved thermal dissipation

Compared with MUR105 and 1N4001TR, the S2AA delivers optimal balance of surge robustness, low forward loss, and SMT manufacturability for ≤100 kHz power conversion - without requiring layout changes or thermal redesign.

Availability

S2AA is available at Aetrix Electronics and suitable for DC-DC converters, lighting drivers, snubber networks, and general-purpose rectification requiring stable component supply and full traceability.

Supply support for S2AA 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 global power, automotive, and industrial markets since 1979.

The S2AA belongs to TSC's S2x series of surface-mount rectifiers engineered for high-volume, high-reliability power conversion - emphasizing thermal robustness, automated assembly readiness, and compliance with environmental standards.

FAQ

What is the maximum junction temperature rating for the S2AA?

The S2AA has a maximum junction temperature (T_J_MAX) of +150 °C, enabling operation in thermally demanding environments such as enclosed LED drivers or industrial power supplies. This rating is validated per JEDEC test conditions and supports reliable long-term performance when thermal design respects the 16 °C/W junction-to-lead resistance. The S2AA must be mounted on adequate copper area to maintain this limit under full 1.5 A load.

Does the S2AA have a specified reverse recovery time, and how does it affect circuit performance?

Yes, the S2AA has a reverse recovery time (t_rr) of 1500 ns under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A test conditions. This standard recovery characteristic makes the S2AA appropriate for switching frequencies up to ~100 kHz. At higher frequencies, switching losses increase due to tail current; for >200 kHz designs, ultrafast alternatives like MUR105 should be considered. The S2AA's t_rr is fully characterized in the K2102 datasheet revision.

Is the S2AA RoHS and halogen-free compliant?

Yes, the S2AA is RoHS compliant per EU Directive 2011/65/EU and halogen-free per IEC 61249-2-21. These certifications are confirmed in TSC's official product documentation (Version K2102) and verified through material declarations. The S2AA uses matte tin-plated leads and UL 94V-0 molding compound, making it suitable for green manufacturing and export to regulated markets without additional compliance validation.

What is the moisture sensitivity level (MSL) of the S2AA, and what does it mean for assembly?

The S2AA is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30 °C/60% RH and requires no baking prior to reflow soldering. This eliminates moisture-related popcorning risk and simplifies SMT line logistics. The S2AA's glass-passivated die and hermetic molding contribute to this robustness - a key advantage over higher-MSL rectifiers that demand strict dry-pack handling and time-limited exposure.

Can the S2AA replace a 1N4001 in an existing design?

Yes, the S2AA can functionally replace a 1N4001 in most cases, offering identical 50 V V_RRM and comparable V_F, but with critical improvements: surface-mount DO-214AC packaging (vs. axial DO-41), 1.5 A I_F (vs. 1.0 A), 50 A I_FSM (vs. 30 A), and J-STD-020 Level 1 MSL. However, PCB layout must be updated to accommodate the SMA footprint. The S2AA is not a drop-in replacement electrically or mechanically unless the board is redesigned for SMT.

S2AA 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:: 1.1 V @ 1.5 A

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

Reverse Recovery Time (trr):: 1.5 µs

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

Capacitance @ Vr, F:: 30pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

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

S2AA FAQ

1.How can I place an order for S2AA through Aetrix?

Please submit a Request for Quotation (RFQ) for S2AA 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 S2AA reliable?

The price and inventory of S2AA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2AA is usually 5 days.

3.What payment methods are accepted for S2AA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2AA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S2AA?

S2AA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S2AA 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 S2AA?

For technical support, including S2AA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2AA requirements.

6.How does Aetrix verify that S2AA is sourced from the original manufacturer or authorized distributors?

All S2AA 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 S2AA meets industry standards.

7.What is the process for return or replacement of S2AA?

All S2AA units undergo pre-shipment inspection (PSI). If there is an issue with S2AA, 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 S2AA part is unused and in its original packaging.

Return procedure for S2AA:

1.Submit a request within 90 days.

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

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