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Taiwan Semiconductor Corporation HS1KFS
- Part No.:
- HS1KFS
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
HS1KFS.pdf
- Description:
- DIODE GEN PURP 800V 1A SOD128
- Quantity:
- Payment:
- Shipping:
Inventory:1,398
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Product details
Overview
HS1KFS from Taiwan Semiconductor is a 1 A, 800 V repetitive peak reverse voltage (VRRM) surface-mount fast recovery rectifier in SOD-128 package, featuring 1.49 V typical forward voltage at 1.0 A and 25°C, 75 ns reverse recovery time, and 8 pF junction capacitance - optimized for high-efficiency DC/DC converters and switching inverters.
For engineers reviewing the HS1KFS datasheet, HS1KFS pinout, HS1KFS application, or HS1KFS equivalent, key selection criteria include its 800 V VRRM, thermal resistance of 29°C/W (junction-to-lead), 150°C maximum junction temperature, RoHS-compliant halogen-free construction, and SOD-128 low-profile footprint compatibility with automated assembly.
Technical Context
The HS1KFS is a single-die, glass-passivated silicon PN junction rectifier designed for fast-switching power conversion. Its 75 ns reverse recovery time and low 8 pF junction capacitance minimize switching losses in high-frequency topologies, while the 29°C/W junction-to-lead thermal resistance supports reliable 1 A continuous operation on standard PCB copper pads.
Rated for 800 V VRRM and 35 A non-repetitive surge (8.3 ms), the device operates across –55°C to +150°C junction range and maintains <1.39 V max forward voltage at 1.0 A and 125°C - enabling stable performance in thermally constrained industrial and automotive auxiliary power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - supports input stages up to 560 V RMS in offline SMPS designs |
| IF | 1 A continuous - suitable for mid-power secondary-side rectification |
| trr | 75 ns - enables operation up to ~2 MHz switching frequency with low recovery loss |
| CJ | 8 pF at 1 MHz, 4 V - reduces capacitive coupling noise in high-dv/dt environments |
| RθJL | 29°C/W - allows 1 A load with ≤29°C temperature rise above lead temperature on 5 mm × 5 mm Cu pad |
| VF (max) | 1.70 V at 1.0 A, 25°C - defines worst-case conduction loss of 1.7 W at full rated current |
| IR (max) | 1 µA at 25°C, 800 V - ensures minimal leakage in high-impedance hold-up circuits |
Pinout & Package
Package: SOD-128 - low-profile, surface-mount plastic package with matte tin-plated leads, UL 94V-0 molding compound, and cathode band polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node return) |
| Cathode | Current exit point during forward conduction; marked by band | Connected to output rail or filter capacitor positive terminal; carries full load current |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enhances humidity resistance and long-term reliability under thermal cycling and humid environments |
| Fast switching (75 ns trr) | Reduces turn-off energy loss in hard-switched flyback and forward converters |
| Low profile SOD-128 package | Enables compact layout in space-constrained power modules and adapter PCBs |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and global environmental compliance requirements for industrial shipments |
Applications
| DC/DC Converter Secondary Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: High-efficiency isolated DC/DC converter delivering 12–24 V output from 400 V bus in telecom power supplies. IC Role / Device Role / Timing Role: Primary unidirectional power transfer element on secondary side; conducts during transformer reset phase. Use Value: 1.49 V typical VF at 1 A minimizes conduction loss; 800 V VRRM provides margin against reflected voltage spikes. | Use Scenario: Bidirectional energy recirculation path in half-bridge motor drive inverters operating at 20–100 kHz. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during MOSFET off-time. Use Value: 75 ns trr prevents reverse recovery oscillation; 35 A IFSM withstands transient current surges. |
| AC-DC Adapter Output Stage | Industrial PLC Power Supply Input Protection |
Use Scenario: Compact wall-mounted AC-DC adapter converting 90–264 V AC to 5 V/2 A USB-C PPS output. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology. Use Value: SOD-128 footprint enables automated placement; 150°C TJMAX supports sealed enclosure thermal design. | Use Scenario: Reverse polarity and overvoltage protection circuit in 24 V DC input stage of programmable logic controller. IC Role / Device Role / Timing Role: Input protection rectifier blocking reverse feed and clamping transients. Use Value: 1 µA max IR at 25°C ensures negligible standby current; glass passivation resists industrial contaminants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast recovery rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08 | Same 1 A / 800 V rating; TO-277 package (larger footprint); 70 ns trr; 1.25 V VF typ at 1 A | Requires PCB rework due to different outline and thermal pad; higher thermal mass slows response to transients | Prefer when higher surge robustness (60 A IFSM) and legacy TO-277 compatibility are required |
| ES1J | SOD-123 package (smaller); 1 A / 600 V VRRM; 35 ns trr; 1.7 V VF max at 1 A | Limited to ≤420 V RMS input; unsuitable for 800 V systems without derating | Select only for cost-sensitive, lower-voltage (<600 V) designs where faster recovery outweighs voltage margin needs |
Compared with STTH1R08 and ES1J, the HS1KFS delivers optimal balance of 800 V capability, SOD-128 manufacturability, and 75 ns recovery in space-constrained industrial power supplies - without requiring layout changes or sacrificing voltage safety margin.
Availability
HS1KFS is available at Aetrix Electronics and suitable for DC/DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for HS1KFS 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 HS1KFS belongs to TSC's HS1xFS fast recovery rectifier family, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC power conversion in compact surface-mount designs.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) rating for HS1KFS?
The HS1KFS has a specified VRRM of 800 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version C2103). This rating defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown, making HS1KFS suitable for 560 V RMS input applications with appropriate safety margin. Exceeding this value risks irreversible avalanche failure.
What is the forward voltage (VF) of HS1KFS at 1.0 A and 25°C?
The HS1KFS exhibits a typical forward voltage of 1.49 V and a maximum of 1.70 V at 1.0 A and 25°C, per the Electrical Specifications table. This VF directly determines conduction loss (Pcond = IF × VF), resulting in ≤1.7 W dissipation at full rated current - a critical parameter for thermal design in enclosed power adapters using HS1KFS.
Does HS1KFS have a defined reverse recovery time (trr)?
Yes, the HS1KFS has a specified reverse recovery time of 75 ns under test conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is explicitly listed in the Electrical Specifications section for HS1JFS, HS1KFS, and HS1MFS variants. The 75 ns trr enables efficient operation in switching power supplies up to several hundred kHz without excessive recovery loss.
What package type is used for HS1KFS?
The HS1KFS is housed in the SOD-128 surface-mount package, as confirmed in the Mechanical Data and Ordering Information sections. This low-profile, dual-leaded plastic package features matte tin-plated leads, UL 94V-0 molding compound, and cathode band polarity marking - optimized for automated pick-and-place and reflow soldering in high-volume manufacturing of HS1KFS-based power supplies.
What is the junction-to-lead thermal resistance (RθJL) of HS1KFS?
The HS1KFS has a typical junction-to-lead thermal resistance (RθJL) of 29°C/W, measured with the device mounted on a 5 mm × 5 mm copper pad PCB per JESD51-3. This parameter quantifies how effectively heat transfers from the silicon die to the PCB copper via the leads, enabling accurate thermal modeling when designing heatsinking or board layout for HS1KFS in continuous 1 A operation.
HS1KFS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-128
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- 8pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-128
- Operating Temperature - Junction:
- -55°C ~ 150°C
HS1KFS FAQ
1.How can I place an order for HS1KFS through Aetrix?
Please submit a Request for Quotation (RFQ) for HS1KFS 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 HS1KFS reliable?
The price and inventory of HS1KFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HS1KFS is usually 5 days.
3.What payment methods are accepted for HS1KFS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HS1KFS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HS1KFS?
HS1KFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HS1KFS 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 HS1KFS?
For technical support, including HS1KFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HS1KFS requirements.
6.How does Aetrix verify that HS1KFS is sourced from the original manufacturer or authorized distributors?
All HS1KFS 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 HS1KFS meets industry standards.
7.What is the process for return or replacement of HS1KFS?
All HS1KFS units undergo pre-shipment inspection (PSI). If there is an issue with HS1KFS, 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 HS1KFS part is unused and in its original packaging.
Return procedure for HS1KFS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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