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Taiwan Semiconductor Corporation HS1AL
- Part No.:
- HS1AL
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
HS1AL.pdf
- Description:
- 50NS, 1A, 50V, HIGH EFFICIENT RE
- Quantity:
- Payment:
- Shipping:
Inventory:19,485
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Product details
Overview
HS1AL from Taiwan Semiconductor is a 1 A, 50 V repetitive peak reverse voltage (VRRM) surface-mount silicon rectifier diode in Sub SMA package, featuring 0.95 V max forward voltage at 1 A and 5 µA max reverse leakage at 25°C, used in DC-DC converters and freewheeling paths.
For engineers reviewing the HS1AL datasheet, HS1AL pinout, HS1AL application, or HS1AL equivalent, key selection factors include its 50 V VRRM, 30 A IFSM, 100 °C/W RθJA, JESD201 Class 1A whisker resistance, and Sub SMA low-profile footprint for high-density power stage layouts.
Technical Context
The HS1AL is a single-die, glass-passivated, planar junction silicon rectifier optimized for high-efficiency switching-mode power supplies. Its 50 V VRRM rating targets low-voltage DC-DC stages where low forward drop and fast recovery are critical.
With 50 ns typical reverse recovery time (trr) and 20 pF junction capacitance at 4 V, the HS1AL supports moderate-frequency operation while maintaining low switching losses and EMI generation in flyback and buck-derived topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating range in low-voltage output rectification |
| IF | 1 A - Continuous average forward current; supports compact thermal design in 1 A power rails |
| VF (max) | 0.95 V @ 1 A, 25°C - Low conduction loss enabling >92% efficiency in 5–12 V output stages |
| IFSM | 30 A - Peak surge capability for startup/load transient tolerance without failure |
| trr (max) | 50 ns - Enables stable operation up to ~500 kHz switching frequencies with minimal reverse recovery loss |
| RθJA | 100 °C/W - Requires ≥25 mm² copper pad for 1 A continuous operation at ≤70°C ambient |
| Junction temp | −55 to +150 °C - Supports industrial temperature range deployment without derating below 1 A |
Pinout & Package
Package: Sub SMA - Low-profile, surface-mount plastic package with matte tin-plated leads, UL 94V-0 molding compound, and cathode band polarity marking. Weight: 0.019 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck sync rectifier or transformer secondary center-tap) |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail; cathode band identifies this terminal for correct PCB orientation and automated placement |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability under humidity and thermal cycling; meets J-STD-020 MSL Level 1 |
| Sub SMA low-profile package | Enables <0.9 mm board height in space-constrained modules such as PoL converters and USB-PD adapters |
| 100% matte tin lead finish | Ensures solderability per J-STD-002 and eliminates whisker risk per JESD201 Class 1A |
| Halogen-free construction | Complies with IEC 61249-2-21 for environmentally regulated end equipment including EU medical and industrial devices |
Applications
| DC-DC Converter Output Rectification | Freewheeling Diode in Buck Regulators |
|---|---|
Use Scenario: Secondary-side rectification in isolated 5 V/1 A flyback converters powering microcontrollers and sensors. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output; replaces Schottky where cost sensitivity outweighs ultra-low VF. Use Value: 0.95 V VF limits conduction loss to <0.95 W, reducing heatsink need versus higher-VF alternatives at same current. | Use Scenario: Freewheeling path across inductor in non-synchronous buck regulators for FPGA core supplies. IC Role / Device Role / Timing Role: Provides current continuity during high-side switch off-time; trr ≤ 50 ns minimizes voltage overshoot and ringing. Use Value: 50 ns trr enables stable operation at 300–500 kHz without snubber networks required by slower rectifiers. |
| Switching Mode Inverter Auxiliary Supply | Industrial Sensor Power Rail Protection |
Use Scenario: Auxiliary 12 V supply rectification in motor drive inverters using discrete IGBT gate drivers. IC Role / Device Role / Timing Role: Converts transformer-coupled AC to stable DC for bias rails; operates continuously at 85°C ambient. Use Value: 150°C TJMAX and −55°C to +150°C storage range ensure reliability across extended industrial temperature cycles. | Use Scenario: Reverse polarity and overvoltage protection on 24 V sensor input lines in PLC analog modules. IC Role / Device Role / Timing Role: Blocks reverse current flow and clamps transients via inherent junction breakdown margin above system voltage. Use Value: 50 V VRRM provides 2× safety margin over 24 V nominal, while 5 µA IR prevents signal leakage in high-impedance sensing circuits. |
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 | Same Sub SMA package, 1 A/50 V, but 1.15 V VF max and 75 ns trr; higher RθJA (120 °C/W) | Suitable for lower-frequency (<200 kHz) designs where VF penalty is acceptable | Prefer HS1AL where efficiency or thermal headroom is constrained |
| Vishay VS-MBR150 | 1 A/50 V Schottky; 0.52 V VF but only 125°C TJMAX and no rated VRRM >50 V | Better for ultra-low-loss 5 V outputs, but unsuitable for 125°C ambient or transient-prone environments | Choose HS1AL when robustness, temperature margin, or cost-per-watt favors silicon over Schottky |
Compared with MUR105 and VS-MBR150, the HS1AL delivers superior thermal performance (100 vs. 120 °C/W), tighter VF control (0.95 V), and broader temperature resilience-making it optimal for thermally dense, industrial-grade 1 A rectification where reliability trumps marginal VF gain.
Availability
HS1AL is available at Aetrix Electronics and suitable for DC-DC converter output rectification, freewheeling diode applications, and switching mode inverter auxiliary supplies requiring stable component supply and full traceability.
Supply support for HS1AL 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.
The HS1AL belongs to TSC's HS1xL high-efficiency rectifier family, designed specifically for cost-sensitive, high-volume power conversion applications demanding reliability, RoHS/halogen-free compliance, and automated assembly compatibility.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the HS1AL?
The HS1AL has a maximum repetitive peak reverse voltage (VRRM) of 50 V. This rating is explicitly specified in the Absolute Maximum Ratings table for the HS1AL variant and defines the highest reverse voltage the device can block repeatedly without breakdown. It is critical for selecting appropriate input/output voltage margins in DC-DC and inverter auxiliary supply designs. The HS1AL must not be subjected to reverse voltages exceeding 50 V in normal operation.
What is the forward voltage (VF) of the HS1AL at 1 A and 25°C?
The HS1AL exhibits a maximum forward voltage (VF) of 0.95 V at 1 A forward current and 25°C junction temperature. This value is confirmed in the Electrical Specifications table under "HS1AL" column for the condition IF = 1 A, TJ = 25°C. It reflects conduction loss under typical operating conditions and directly impacts thermal design and efficiency calculations in power stage layouts.
Does the HS1AL have a defined reverse recovery time (trr)?
Yes, the HS1AL has a maximum reverse recovery time (trr) of 50 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This parameter is documented in the Electrical Specifications table for the HS1AL–HS1GL group. It enables predictable switching behavior in medium-frequency buck and flyback topologies and distinguishes the HS1AL from standard slow recovery rectifiers.
What package type does the HS1AL use, and what are its key mechanical attributes?
The HS1AL uses the Sub SMA package, a low-profile surface-mount outline with matte tin-plated leads, UL 94V-0 compliant molding compound, and cathode band polarity marking. Its mechanical data confirms JESD201 Class 1A whisker resistance, MSL Level 1 moisture sensitivity, and approximate weight of 0.019 g-making it compatible with high-speed pick-and-place and reflow processes in volume manufacturing.
Is the HS1AL RoHS and halogen-free compliant?
Yes, the HS1AL is RoHS compliant and halogen-free per IEC 61249-2-21. These compliance statements appear in the FEATURES section of the official Taiwan Semiconductor documentation. They confirm suitability for environmentally regulated markets and align with modern industrial and consumer electronics sustainability requirements without requiring additional material declarations.
HS1AL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
HS1AL FAQ
1.How can I place an order for HS1AL through Aetrix?
Please submit a Request for Quotation (RFQ) for HS1AL 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 HS1AL reliable?
The price and inventory of HS1AL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HS1AL is usually 5 days.
3.What payment methods are accepted for HS1AL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HS1AL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HS1AL?
HS1AL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HS1AL 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 HS1AL?
For technical support, including HS1AL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HS1AL requirements.
6.How does Aetrix verify that HS1AL is sourced from the original manufacturer or authorized distributors?
All HS1AL 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 HS1AL meets industry standards.
7.What is the process for return or replacement of HS1AL?
All HS1AL units undergo pre-shipment inspection (PSI). If there is an issue with HS1AL, 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 HS1AL part is unused and in its original packaging.
Return procedure for HS1AL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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