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Taiwan Semiconductor Corporation S2KH
- Part No.:
- S2KH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S2KH.pdf
- Description:
- DIODE GEN PURP 800V 2A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
S2KH from Taiwan Semiconductor is a 2 A, 800 V surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, 50 A surge capability, 1.15 V max forward voltage at 2 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the S2KH datasheet, S2KH pinout, S2KH application, or S2KH equivalent, key selection factors include its 800 V repetitive peak reverse voltage, 1500 ns reverse recovery time, moisture sensitivity level 1 rating, RoHS/halogen-free compliance, and suitability for freewheeling and snubber circuits in DC-DC converters and car lighting systems.
Technical Context
The S2KH operates as a single-die standard recovery rectifier with unidirectional conduction. Its junction-to-lead thermal resistance is 16 °C/W, enabling effective heat transfer to PCB copper, and it supports continuous operation up to 150 °C junction temperature.
Electrical behavior is defined by 1.15 V max forward voltage at 2 A/25°C, 1 µA max reverse leakage at 25°C (125 µA at 125°C), 30 pF typical junction capacitance at 4 V, and 1500 ns reverse recovery time under specified test conditions (IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - maximum non-repetitive reverse voltage the device blocks reliably in circuit |
| IF | 2 A - continuous average forward current rating at TA = 75°C on FR-4 PCB |
| IFSM | 50 A - peak surge current handling for 8.3 ms half-sine wave without failure |
| VF (max) | 1.15 V @ 2 A, 25°C - defines conduction loss and thermal load in high-current paths |
| trr | 1500 ns - determines switching losses and EMI generation in snubber/freewheeling use |
| TJ max | +150°C - enables operation in under-hood automotive environments with minimal derating |
| RθJL | 16 °C/W - quantifies thermal path efficiency from die to lead, critical for PCB layout design |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-indicated by band, matte tin-plated leads, UL 94V-0 molding compound, 0.090 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry point | Connects to lower-potential side of power path; polarity must match schematic symbol |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Must connect toward higher-voltage rail; band orientation verifies correct placement during automated assembly |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TC, UHAST, and ESD |
| Glass passivated junction | Enhances long-term reliability and humidity resistance versus epoxy-passivated alternatives |
| Moisture sensitivity level 1 | Enables direct placement without baking, reducing manufacturing overhead and floor-life constraints |
| Low VF and high IFSM | Supports compact thermal design in space-constrained DC-DC modules while maintaining surge robustness |
| Halogen-free & RoHS compliant | Meets global environmental regulations and enables use in EU/China/Japan automotive supply chains |
Applications
| DC–DC Converter | Automotive Lighting |
|---|---|
Use Scenario: Output rectification in isolated flyback or forward converters powering infotainment or ADAS subsystems. IC Role / Device Role / Timing Role: Primary output rectifier converting transformer secondary AC to regulated DC. Use Value: 800 V VRRM provides margin against reflected transients; 50 A IFSM handles startup surges without degradation. | Use Scenario: LED driver output stage in headlamp or daytime running light (DRL) modules. IC Role / Device Role / Timing Role: Freewheeling diode across inductive LED current regulator switches. Use Value: 1500 ns trr minimizes voltage overshoot during switch turn-off; AEC-Q101 ensures lifetime reliability in thermal cycling environments. |
| Snubber Network | Freewheeling Circuit |
Use Scenario: RC snubber across MOSFET/IGBT drains in 12 V–48 V automotive motor drives. IC Role / Device Role / Timing Role: Transient energy clamp during switching transitions. Use Value: 800 V rating withstands voltage spikes exceeding bus voltage; low CJ (30 pF) limits capacitive loading on gate drivers. | Use Scenario: Inductive load protection in seat/mirror/window control ECUs. IC Role / Device Role / Timing Role: Path for stored coil energy dissipation when drive transistor turns off. Use Value: 2 A IF rating matches typical solenoid/relay coil currents; glass passivation prevents corrosion-induced leakage in humid cabin environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R08 | 800 V VRRM, 2 A IF, 1.75 V VF (max), 100 ns trr, TO-220AC package | Higher VF increases conduction loss; faster trr reduces EMI but requires tighter layout; through-hole mounting | Select when lower switching loss dominates over thermal footprint and board space is available |
| ES2J (ON Semiconductor) | 600 V VRRM, 2 A IF, 1.7 V VF (max), 35 ns trr, DO-214AA package | Limited to ≤600 V systems; significantly faster recovery but higher VF degrades efficiency at high duty cycles | Choose only if system VR does not exceed 600 V and ultra-fast recovery is mandatory for noise-sensitive analog sections |
Compared with STTH2R08 and ES2J, the S2KH delivers optimal balance of 800 V blocking, SMB footprint, AEC-Q101 qualification, and 1.15 V low VF-making it preferred for space-constrained, thermally demanding automotive DC-DC and lighting designs where reliability and efficiency are jointly critical.
Availability
S2KH is available at Aetrix Electronics and suitable for DC–DC converters, automotive lighting systems, and snubber networks requiring stable component supply across production lifecycles.
Supply support for S2KH 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, with global distribution and AEC-Q101-compliant product lines.
The S2KH belongs to TSC's S2xH family of surface-mount rectifiers designed specifically for automotive and industrial power conversion applications demanding high surge robustness, thermal stability, and regulatory compliance.
FAQ
What is the maximum junction temperature rating for the S2KH?
The S2KH has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings in the official datasheet. This allows reliable operation in under-hood automotive environments and high-power-density DC-DC converters. Derating curves confirm usable current capacity down to 75°C ambient on standard PCB layouts. The S2KH maintains specification compliance within this full range.
Is the S2KH suitable for automotive applications?
Yes, the S2KH is AEC-Q101 qualified and explicitly listed for automotive applications including car lighting and DC-DC converters. It meets JESD201 Class 2 whisker testing, moisture sensitivity level 1, and halogen-free requirements per IEC 61249-2-21. These qualifications are documented in the official Taiwan Semiconductor datasheet for the S2KH.
What is the reverse recovery time (trr) of the S2KH and how is it measured?
The S2KH has a reverse recovery time (trr) of 1500 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is specified in the Electrical Specifications table of the official datasheet and reflects performance in freewheeling and snubber roles. The S2KH is a standard recovery rectifier-not an ultrafast or soft-recovery type-so this trr is consistent with its intended use in moderate-frequency power conversion.
Does the S2KH have a halogen-free and RoHS-compliant construction?
Yes, the S2KH uses halogen-free molding compound per IEC 61249-2-21 and is fully RoHS compliant. These environmental attributes are confirmed in the Features section of the official Taiwan Semiconductor datasheet and apply to all units shipped under the S2KH ordering code. The S2KH meets global regulatory requirements for automotive and industrial electronics without exception.
What packaging and reel quantity is available for the S2KH?
The S2KH is supplied in DO-214AA (SMB) package on tape-and-reel format, with 3,000 units per reel. This packaging supports automated SMT placement and aligns with JEDEC standards for surface-mount discretes. The marking code "S2K" appears on the cathode-banded surface, and the S2KH reel labeling includes full traceability data per Taiwan Semiconductor's quality system.
S2KH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.15 V @ 2 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 1.5 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- 30pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2KH FAQ
1.How can I place an order for S2KH through Aetrix?
Please submit a Request for Quotation (RFQ) for S2KH 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 S2KH reliable?
The price and inventory of S2KH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KH is usually 5 days.
3.What payment methods are accepted for S2KH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2KH?
S2KH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2KH 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 S2KH?
For technical support, including S2KH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KH requirements.
6.How does Aetrix verify that S2KH is sourced from the original manufacturer or authorized distributors?
All S2KH 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 S2KH meets industry standards.
7.What is the process for return or replacement of S2KH?
All S2KH units undergo pre-shipment inspection (PSI). If there is an issue with S2KH, 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 S2KH part is unused and in its original packaging.
Return procedure for S2KH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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