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Taiwan Semiconductor Corporation HS1KLH
- Part No.:
- HS1KLH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
HS1KLH.pdf
- Description:
- 75NS, 1A, 800V, HIGH EFFICIENT R
- Quantity:
- Payment:
- Shipping:
Inventory:3,256
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Product details
Overview
HS1KLH from Taiwan Semiconductor is a 1 A, 800 V repetitive peak reverse voltage (VRRM), surface-mount silicon rectifier diode in Sub SMA package, featuring 1.70 V max forward voltage at 1 A and 75 ns reverse recovery time, used for freewheeling and snubber functions in automotive DC-DC converters.
For engineers reviewing the HS1KLH datasheet, HS1KLH pinout, HS1KLH application, or HS1KLH equivalent, key selection criteria include its AEC-Q101 qualification, 150 °C maximum junction temperature, moisture sensitivity level 1 rating, glass-passivated junction, and 100 °C/W junction-to-ambient thermal resistance.
Technical Context
The HS1KLH is a single-die, standard recovery silicon rectifier optimized for high-voltage, moderate-current freewheeling and snubbing in automotive power supplies. Its 800 V VRRM and 150 °C TJ(max) support operation in under-hood environments with elevated ambient temperatures.
With 75 ns reverse recovery time and 15 pF junction capacitance at 1 MHz/4 V, the HS1KLH balances switching speed and low leakage (5 µA @ 25 °C, 150 µA @ 125 °C), making it suitable for 50–200 kHz DC-DC topologies where EMI and loss trade-offs are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - supports input rails up to 560 V DC in boost/flyback designs without derating |
| IF | 1 A continuous - rated for steady-state conduction in low-power auxiliary supplies |
| VF (max) | 1.70 V @ 1 A, 25 °C - determines conduction loss of ~1.7 W at full load |
| trr | 75 ns - limits switching-related turn-off losses and EMI in hard-switched converters |
| RθJA | 100 °C/W - requires ≥25 mm² copper pad for safe 1 A operation at 70 °C ambient |
| IR (max) | 150 µA @ 125 °C - ensures minimal leakage in high-temp snubber networks |
| Package | Sub SMA - low-profile, JEDEC-compliant SMD footprint compatible with automated assembly |
Pinout & Package
Sub SMA package: 2-terminal surface-mount device with cathode indicated by band; matte tin-plated leads, UL 94V-0 molding compound, 0.019 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential node (e.g., switch node in buck converter freewheel path) |
| Cathode | Current exit point during forward conduction; marked with band | Connected to higher-potential rail (e.g., output capacitor positive terminal) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and UHAST |
| Glass-passivated junction | Enhances long-term stability and humidity resistance in harsh under-hood environments |
| Moisture sensitivity level 1 | Enables direct placement without baking, reducing manufacturing overhead |
| Halogen-free construction | Complies with IEC 61249-2-21, supporting RoHS and ELV directive compliance |
| Low profile Sub SMA | 0.9 mm max height enables use in space-constrained modules such as LED drivers and ECUs |
Applications
| Automotive DC-DC Converters | LED Headlamp Drivers |
|---|---|
Use Scenario: Step-down conversion from 12 V battery to 5 V/3.3 V for infotainment and ADAS sensors. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck regulator output stage. Use Value: 800 V VRRM provides margin against load dump transients; 75 ns trr minimizes switching loss at 100–200 kHz. | Use Scenario: Constant-current regulation for high-brightness automotive headlamps with PWM dimming. IC Role / Device Role / Timing Role: Snubber diode across MOSFET switch to clamp inductive kickback during PWM off-time. Use Value: 150 °C TJ(max) sustains operation near hot LED heatsinks; glass passivation prevents corrosion in humid lamp housings. |
| Engine Control Unit Power Supplies | Start-Stop System Auxiliary Rails |
Use Scenario: Isolated auxiliary supply for microcontroller and sensor bias in engine bay ECUs. IC Role / Device Role / Timing Role: Output rectifier in flyback transformer secondary winding. Use Value: 100 °C/W RθJA allows thermal design with minimal copper; AEC-Q101 ensures lifetime reliability over 15-year vehicle service. | Use Scenario: Backup power rail generation during cranking events when battery voltage dips below 6 V. IC Role / Device Role / Timing Role: Freewheeling path for energy stored in input filter inductors during voltage sag. Use Value: 30 A IFSM withstands repeated cranking surges; moisture level 1 eliminates pre-reflow baking in high-volume SMT lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08 | 800 V VRRM, 1.05 V VF (typ), 50 ns trr, DO-214AC package | Lower VF reduces conduction loss but larger DO-214AC footprint increases board area | Prefer STTH1R08 where efficiency > size; prefer HS1KLH where AEC-Q101 and Sub SMA fit are mandatory |
| ES1J | 600 V VRRM, 1.7 V VF (max), 35 ns trr, SMA package | Lower voltage rating limits use to ≤420 V DC systems; faster recovery suits higher-frequency designs | Choose ES1J only if system VIN(max) ≤ 420 V and layout allows standard SMA; HS1KLH required for 800 V systems |
Compared with STTH1R08 and ES1J, the HS1KLH uniquely combines AEC-Q101 qualification, Sub SMA footprint, and 800 V rating-making it the only option for space-constrained, high-reliability automotive 12 V/48 V hybrid systems requiring validated automotive stress testing.
Availability
HS1KLH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and engine control unit power supplies requiring stable component supply across extended production lifecycles.
Supply support for HS1KLH 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 automotive, industrial, and consumer markets since 1979.
The HS1KLH belongs to TSC's AEC-Q101-qualified Sub SMA rectifier family, designed specifically for high-reliability, high-temperature automotive power conversion where compact size, transient robustness, and long-term parametric stability are essential.
FAQ
What is the maximum junction temperature rating for HS1KLH?
The HS1KLH has a maximum junction temperature (TJ) rating of +150 °C, verified per AEC-Q101 stress test conditions. This allows reliable operation in under-hood automotive environments where ambient temperatures reach 125 °C, provided thermal design maintains junction temperature below this limit. The HS1KLH datasheet specifies derating curves confirming 1 A current capability down to 75 °C ambient with standard PCB copper.
Is HS1KLH pin-compatible with other devices in the HS1xLH series?
Yes, all HS1xLH devices-including HS1KLH-share identical Sub SMA package dimensions, pinout, and solder pad layout. The only differences are VRRM rating (800 V for HS1KLH), forward voltage, and reverse recovery time. This enables drop-in replacement across the series during design iteration or voltage-margin tuning without PCB changes.
Does HS1KLH meet automotive qualification standards?
Yes, HS1KLH is explicitly AEC-Q101 qualified per version A2103 of the datasheet. Testing includes HTGB, HTRB, temperature cycling, and unbiased HAST-validating suitability for automotive powertrain, body, and lighting applications. The device also meets J-STD-020 moisture sensitivity level 1 and JESD201 whisker resistance Class 2.
What is the reverse recovery time (trr) specification for HS1KLH?
The HS1KLH has a maximum reverse recovery time (trr) of 75 ns, measured at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is confirmed across the full operating temperature range and supports switching frequencies up to 200 kHz in DC-DC converters while maintaining acceptable EMI and turn-off loss profiles.
Can HS1KLH be used in snubber circuits?
Yes, HS1KLH is explicitly listed in the manufacturer's Applications section for snubber use. Its 800 V VRRM, 150 µA max reverse leakage at 125 °C, and 75 ns trr make it effective for clamping inductive voltage spikes across MOSFETs in automotive LED drivers and motor control modules. The glass-passivated junction ensures long-term stability under repetitive surge stress.
HS1KLH 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):
- 800 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 V
- Capacitance @ Vr, F:
- 15pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Sub SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
HS1KLH FAQ
1.How can I place an order for HS1KLH through Aetrix?
Please submit a Request for Quotation (RFQ) for HS1KLH 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 HS1KLH reliable?
The price and inventory of HS1KLH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HS1KLH is usually 5 days.
3.What payment methods are accepted for HS1KLH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HS1KLH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HS1KLH?
HS1KLH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HS1KLH 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 HS1KLH?
For technical support, including HS1KLH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HS1KLH requirements.
6.How does Aetrix verify that HS1KLH is sourced from the original manufacturer or authorized distributors?
All HS1KLH 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 HS1KLH meets industry standards.
7.What is the process for return or replacement of HS1KLH?
All HS1KLH units undergo pre-shipment inspection (PSI). If there is an issue with HS1KLH, 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 HS1KLH part is unused and in its original packaging.
Return procedure for HS1KLH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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