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Taiwan Semiconductor Corporation HS1AH
- Part No.:
- HS1AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
HS1AH.pdf
- Description:
- 50NS, 1A, 50V, HIGH EFFICIENT RE
- Quantity:
- Payment:
- Shipping:
Inventory:8,134
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Product details
Overview
HS1AH from Taiwan Semiconductor is a 1A, 50V glass-passivated surface-mount Schottky rectifier in DO-214AC (SMA) package, optimized for fast switching and high efficiency in DC-DC converters and snubber circuits. It features 30A peak surge current, 150°C max junction temperature, and 5µA reverse leakage at 25°C.
For engineers reviewing the HS1AH datasheet, HS1AH pinout, HS1AH application, or HS1AH equivalent, key selection criteria include its 50V VRRM, 1.0V forward voltage at 1A, 50ns reverse recovery time, AEC-Q101 qualification, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
The HS1AH is a single-die, unidirectional silicon rectifier with glass-passivated junction for enhanced reliability and moisture resistance (J-STD-020 Level 1). Its thermal design supports 15°C/W junction-to-lead resistance when mounted on a 5mm × 5mm copper pad.
It operates across –55°C to +150°C junction temperature range and delivers stable reverse characteristics up to 50V with <5µA leakage at 25°C, enabling use in compact, thermally constrained power stages where low forward drop and fast recovery are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse voltage before breakdown; defines safe operating ceiling in clamping and freewheeling roles |
| IF | 1 A - Continuous forward current rating; determines steady-state power handling in DC-DC output stages |
| IFSM | 30 A - Non-repetitive surge current capability; supports transient overload tolerance during startup or fault conditions |
| VF @ 1A | 1.0 V - Forward voltage drop at rated DC current; directly impacts conduction loss and thermal load in high-efficiency designs |
| trr | 50 ns - Reverse recovery time; enables operation in high-frequency switching topologies up to ~2 MHz without excessive switching loss |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; allows accurate thermal modeling when soldered to PCB copper pads |
Pinout & Package
Package: DO-214AC (SMA), surface-mount plastic case with cathode band polarity marking, matte tin-plated leads, UL 94V-0 molding compound, and 0.060g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit (e.g., switch node in buck converter); requires thermal relief pad for heat dissipation |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to higher-potential rail (e.g., output capacitor positive); defines directionality in freewheeling paths |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-enables use in under-hood power modules |
| Glass-passivated junction | Provides hermetic protection against humidity and contamination, improving long-term stability in industrial environments |
| Fast switching (50 ns trr) | Reduces turn-off losses in high-frequency SMPS, supporting >500 kHz operation without significant efficiency penalty |
| J-STD-020 Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates baking requirement and simplifies SMT line logistics |
| Halogen-free & RoHS compliant | Meets global environmental compliance mandates for consumer, industrial, and automotive electronics manufacturing |
Applications
| DC-DC Converter Output Rectification | Snubber Network Clamping |
|---|---|
Use Scenario: Used as secondary-side rectifier in isolated flyback or forward converters delivering 3.3–12 V at up to 1 A. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; conducts only during positive half-cycle. Use Value: 1.0 V VF minimizes conduction loss versus standard PN diodes, improving overall converter efficiency by ~2–3% at light-to-moderate loads. | Use Scenario: Placed across MOSFET drain-source or IGBT collector-emitter to suppress voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Clamp diode providing low-impedance path for inductive energy dissipation during turn-off events. Use Value: 50 ns trr ensures rapid turn-on response to transient overvoltage, limiting peak clamp voltage and reducing stress on primary switches. |
| Freewheeling in Buck Regulators | Lighting Driver Flyback Secondary |
Use Scenario: Integrated into non-synchronous buck regulator outputs (e.g., LED drivers, microcontroller power rails) to recirculate inductor current during high-side switch off-time. IC Role / Device Role / Timing Role: Freewheeling path enabling continuous inductor current flow; blocks reverse current during high-side conduction phase. Use Value: Low 1.0 V forward drop reduces voltage headroom loss, allowing tighter output regulation and higher duty-cycle operation at low input voltages. | Use Scenario: Rectifying high-voltage, low-current secondary winding in constant-current LED drivers for street lighting or architectural fixtures. IC Role / Device Role / Timing Role: High-voltage rectifier sustaining 50 V reverse bias while delivering precise current to LED strings. Use Value: 50 V VRRM provides sufficient margin above reflected output voltage (typically ≤35 V), ensuring robust operation under line transients and thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1H50S | Same DO-214AC package, 1A/50V, but VF = 0.95 V typ @ 1A; no AEC-Q101 qualification | Preferred in cost-sensitive consumer power supplies where automotive qualification is unnecessary | Select STPS1H50S if AEC-Q101 is not required and sub-100 mV VF reduction justifies sourcing change |
| SB150 | DO-214AA (SMB) package, same 1A/50V rating, VF = 1.1 V max, trr = 75 ns, no AEC-Q101 | Suitable for legacy layouts using SMB footprint; higher VF and slower recovery increase losses in high-frequency designs | Choose SB150 only when board space or existing stencil supports SMB, and thermal budget permits higher conduction loss |
Compared with STPS1H50S and SB150, the HS1AH uniquely combines AEC-Q101 qualification, 50 ns recovery, and 1.0 V forward drop in DO-214AC-making it the only option qualified for automotive-grade buck converters requiring both reliability and high-frequency efficiency.
Availability
HS1AH is available at Aetrix Electronics and suitable for DC-DC converters, snubber networks, and freewheeling applications requiring stable component supply, automotive-grade reliability, and surface-mount manufacturability.
Supply support for HS1AH 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q101 validation capabilities.
The HS1AH belongs to TSC's HS1xH high-efficiency rectifier family, designed specifically for automotive and industrial switching power supplies where fast recovery, low forward voltage, and robust thermal performance are essential.
FAQ
What is the maximum junction temperature rating for HS1AH?
The HS1AH has a maximum junction temperature (TJ) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet revision B2401. This rating enables reliable operation in under-hood automotive environments and enclosed industrial enclosures. Derating curves show usable current capacity down to 0.5 A at 125°C ambient when mounted on a 5 mm × 5 mm Cu pad. The HS1AH must be thermally anchored to maintain this limit in continuous 1 A operation.
Is HS1AH pin-compatible with other parts in the HS1xH series?
Yes, all HS1xH variants-including HS1AH, HS1BH, and up to HS1MH-share identical DO-214AC (SMA) package dimensions, anode/cathode pinout, and solder pad layout. The only differences are VRRM (50 V to 1000 V) and related electrical parameters like VF and trr. Therefore, HS1AH can be substituted within the same footprint for lower-voltage designs without PCB changes, provided system-level voltage stress remains within 50 V.
Does HS1AH meet automotive reliability standards?
Yes, the HS1AH is explicitly qualified to AEC-Q101 for stress testing including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge. This qualification is documented in the Taiwan Semiconductor product brief and applies specifically to the HS1AH variant-not inferred from the family. The HS1AH is approved for use in automotive powertrain and body electronics where component-level reliability is mandated.
What is the reverse leakage current specification for HS1AH at elevated temperature?
Per the official electrical specifications table, HS1AH exhibits ≤5 µA reverse current (IR) at 25°C and rated VR, rising to ≤50 µA at 100°C and ≤150 µA at 125°C. These values are measured under 30 ms pulse conditions and reflect actual device behavior in thermal-stressed snubber or freewheeling applications. Designers should verify thermal management to avoid exceeding 125°C junction temperature where leakage increases significantly.
Can HS1AH be used in high-frequency switching applications above 1 MHz?
Yes, the HS1AH's 50 ns reverse recovery time (trr) supports reliable operation in switching power supplies operating up to ~2 MHz, as confirmed by characterization curves in the datasheet. Its junction capacitance of 20 pF at 4 V reverse bias further enables minimal capacitive loading in gate-drive or snubber circuits. However, full efficiency gains require careful PCB layout to minimize parasitic inductance-especially in high-di/dt freewheeling paths where the HS1AH is deployed.
HS1AH 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):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
HS1AH FAQ
1.How can I place an order for HS1AH through Aetrix?
Please submit a Request for Quotation (RFQ) for HS1AH 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 HS1AH reliable?
The price and inventory of HS1AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HS1AH is usually 5 days.
3.What payment methods are accepted for HS1AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HS1AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HS1AH?
HS1AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HS1AH 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 HS1AH?
For technical support, including HS1AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HS1AH requirements.
6.How does Aetrix verify that HS1AH is sourced from the original manufacturer or authorized distributors?
All HS1AH 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 HS1AH meets industry standards.
7.What is the process for return or replacement of HS1AH?
All HS1AH units undergo pre-shipment inspection (PSI). If there is an issue with HS1AH, 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 HS1AH part is unused and in its original packaging.
Return procedure for HS1AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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