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Taiwan Semiconductor Corporation S2KAH
- Part No.:
- S2KAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
S2KAH.pdf
- Description:
- 1.5A, 800V, STANDARD RECOVERY RE
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
S2KAH from Taiwan Semiconductor is a surface-mount general-purpose rectifier diode with 800 V repetitive peak reverse voltage (VRRM), 1.5 A average forward current (IF), and 50 A peak surge capability (IFSM), designed for automotive lighting, DC-DC converters, and snubber circuits.
For engineers reviewing the S2KAH datasheet, S2KAH pinout, S2KAH application, or S2KAH equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AC (SMA) package, 1.1 V max forward voltage at 1.5 A, 5 µA max reverse leakage at 25°C, and 1500 ns reverse recovery time under specified test conditions.
Technical Context
The S2KAH is a single-die, glass-passivated silicon junction rectifier optimized for high-reliability automotive and industrial power conversion. Its thermal resistance (RθJL = 16 °C/W) supports stable operation up to 150 °C junction temperature, and its moisture sensitivity level 1 rating enables standard reflow assembly without dry-pack handling.
It delivers low forward voltage drop and high surge robustness in a compact DO-214AC (SMA) outline. The device exhibits 30 pF junction capacitance at 4 V reverse bias and meets JESD201 Class 2 whisker resistance and RoHS/halogen-free compliance per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - maximum non-repetitive reverse voltage the device blocks reliably in circuit |
| IF | 1.5 A - continuous average forward current at TA = 75°C, defining steady-state power handling |
| IFSM | 50 A - peak half-sine surge current (8.3 ms) the device withstands without failure |
| VF (max) | 1.1 V @ IF = 1.5 A, TJ = 25°C - directly impacts conduction loss and thermal design margin |
| IR (max) | 5 µA @ VR = 800 V, TJ = 25°C - determines leakage-related power loss and signal integrity in high-impedance nodes |
| trr | 1500 ns - reverse recovery time under IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, limiting switching frequency use |
| RθJL | 16 °C/W - junction-to-lead thermal resistance, critical for heatsinking via PCB copper pour or leadframe |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-anode/single-cathode configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, 0.060 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of rectified path; must handle full IF and IFSM |
| Cathode | Forward current exit point | Marked by band; connects to output capacitor or load return; carries same current as anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling prior to assembly |
| Low VF and high IFSM | Reduces conduction loss while supporting transient overloads common in automotive power rails |
| Halogen-free construction | Complies with IEC 61249-2-21, supporting environmental compliance in end equipment |
Applications
| Automotive LED Lighting | DC-DC Converter Output Rectification |
|---|---|
Use Scenario: Rectifying switched 12 V/24 V supply in headlamp or tail lamp modules with PWM dimming. IC Role / Device Role / Timing Role: Main power rectifier in flyback or buck-derived topology, conducting during switch-off phase. Use Value: AEC-Q101 qualification ensures lifetime reliability under vehicle vibration and thermal cycling; 800 V VRRM provides margin against load-dump transients. | Use Scenario: Secondary-side rectification in isolated 48 V–12 V DC-DC converters for ADAS ECUs. IC Role / Device Role / Timing Role: Unidirectional current path converting transformer secondary AC to regulated DC output. Use Value: 1.1 V VF minimizes conduction loss at 1.5 A; 50 A IFSM absorbs startup surges and fault currents without degradation. |
| Snubber Network Clamping | Industrial Power Supply Input Stage |
Use Scenario: Clamping voltage spikes across MOSFET drains in motor drive inverters or SMPS primary switches. IC Role / Device Role / Timing Role: Fast-recovery clamping diode in RCD snubber networks absorbing inductive kick energy. Use Value: 1500 ns trr balances speed and softness to limit EMI generation while maintaining robustness; 800 V rating matches 600 V+ MOSFET systems. | Use Scenario: Bridge or single-diode rectification in 230 VAC-input industrial power supplies. IC Role / Device Role / Timing Role: General-purpose rectifier in discrete input stage or auxiliary bias winding circuits. Use Value: DO-214AC package enables automated placement; 150 °C TJ max supports operation in enclosed, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1L08S | 800 V VRRM, 1 A IF, 30 A IFSM, TO-277 package, faster trr (~75 ns) | Lower current rating; suited for space-constrained but lower-power snubbers or signal-level clamping | Select when higher switching speed is prioritized over current capacity and footprint is limited |
| ON Semi MUR160 | 600 V VRRM, 1 A IF, 50 A IFSM, DO-41 package, trr ~50 ns | Lower voltage rating; requires derating in 800 V systems; axial lead limits SMT automation | Choose only if system VR never exceeds 600 V and through-hole assembly is acceptable |
Compared with STTH1L08S and MUR160, the S2KAH uniquely combines 800 V blocking, 1.5 A current, AEC-Q101 qualification, and DO-214AC SMT compatibility-making it optimal for automotive and industrial surface-mount rectification where reliability, voltage margin, and assembly efficiency are jointly critical.
Availability
S2KAH is available at Aetrix Electronics and suitable for automotive LED lighting, DC-DC converter output rectification, and snubber network clamping requiring stable component supply and automotive-grade traceability.
Supply support for S2KAH 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 global automotive, industrial, and consumer markets since 1979.
The S2KAH belongs to TSC's S2xAH family of AEC-Q101-qualified surface-mount rectifiers engineered specifically for high-reliability automotive power conversion and industrial snubbing where voltage margin, surge robustness, and SMT manufacturability are essential.
FAQ
What is the maximum junction temperature rating for the S2KAH?
The S2KAH has a maximum junction temperature (TJ) rating of +150 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This allows reliable operation in under-hood automotive environments and enclosed industrial power supplies. Thermal design must ensure that actual operating TJ remains below this limit using the published RθJL = 16 °C/W and RθJA = 53 °C/W values. The S2KAH datasheet specifies derating curves for IF versus lead temperature.
Is the S2KAH pin-compatible with other devices in the S2xAH series?
Yes-the S2KAH shares identical DO-214AC (SMA) package dimensions, pinout, and mechanical footprint with all members of the S2xAH family (e.g., S2AAH, S2BAH, S2MAH). All variants use the same anode/cathode terminal layout and cathode band polarity marking. No PCB redesign is required when substituting within the series, though electrical parameters-including VRRM, VF, and IR-must be verified for circuit compatibility.
Does the S2KAH meet automotive qualification standards?
Yes, the S2KAH is explicitly qualified to AEC-Q101 Rev D for stress testing including HTGB, HTRB, TC, and ESD. This certification is documented in Taiwan Semiconductor's official product release and datasheet Version A2102. The S2KAH is intended for automotive applications such as lighting and body control modules where component-level reliability validation is mandatory.
What is the reverse recovery time (trr) specification for the S2KAH?
The S2KAH has a typical reverse recovery time (trr) of 1500 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the manufacturer's electrical specifications table. This value is confirmed in the "ELECTRICAL SPECIFICATIONS" section of the S2KAH datasheet and reflects its performance as a general-purpose, not ultrafast, rectifier-suitable for line-frequency and moderate-switching applications but not high-frequency SMPS primary-side use.
How is polarity indicated on the S2KAH package?
Polarity on the S2KAH is indicated by a visible cathode band printed on the DO-214AC (SMA) package body. Per the "MECHANICAL DATA" section of the datasheet, this band identifies the cathode terminal, which must be connected toward the higher-potential node in the rectifier circuit. The anode is the unmarked end. This marking aligns with JEDEC-standard SMA orientation and is verified in the "MARKING DIAGRAM" page of the S2KAH documentation.
S2KAH 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):
- 800 V
- Current - Average Rectified (Io):
- 1.5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1.5 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 1.5 µs
- Current - Reverse Leakage @ Vr:
- 5 µA @ 800 V
- Capacitance @ Vr, F:
- 30pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S2KAH FAQ
1.How can I place an order for S2KAH through Aetrix?
Please submit a Request for Quotation (RFQ) for S2KAH 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 S2KAH reliable?
The price and inventory of S2KAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S2KAH is usually 5 days.
3.What payment methods are accepted for S2KAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S2KAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S2KAH?
S2KAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S2KAH 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 S2KAH?
For technical support, including S2KAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S2KAH requirements.
6.How does Aetrix verify that S2KAH is sourced from the original manufacturer or authorized distributors?
All S2KAH 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 S2KAH meets industry standards.
7.What is the process for return or replacement of S2KAH?
All S2KAH units undergo pre-shipment inspection (PSI). If there is an issue with S2KAH, 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 S2KAH part is unused and in its original packaging.
Return procedure for S2KAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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