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Taiwan Semiconductor Corporation SA15H
- Part No.:
- SA15H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA15H.pdf
- Description:
- 500W, 18.6V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,079
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Product details
Overview
SA15H from Taiwan Semiconductor is an AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 15V working stand-off voltage (VWM), 16.7–20.4V breakdown voltage (VBR), and 26.9V maximum clamping voltage (VC) at 19.5A peak pulse current - designed for automotive ESD and load-dump protection in power supply rails and signal lines.
For engineers reviewing the SA15H datasheet, SA15H pinout, SA15H application, or SA15H equivalent, this page delivers verified electrical parameters, clamping behavior under surge conditions, thermal derating curves, AEC-Q101 qualification status, and direct alternatives for automotive-grade overvoltage protection design.
Technical Context
The SA15H operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR range (16.7–20.4V @ 1mA), clamping transients to ≤26.9V at 19.5A (10/1000μs). It exhibits <1μA reverse leakage at 15V and a fast response time of <1.0ps from 0V to VBR.
Its junction temperature range spans –55°C to +175°C, with steady-state power dissipation of 3W at TL = 75°C on 10×10 mm copper pads. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 16.7 / 20.4 V @ 1 mA - Breakdown threshold range defining turn-on consistency across production lot |
| VC @ IPPM | 26.9 V @ 19.5 A - Clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 500 W - Peak pulse power handling capability per single non-repetitive transient |
| IR @ VWM | <1 μA - Minimal leakage current ensures low standby power loss in always-on systems |
| TJ max | +175 °C - Enables operation in under-hood automotive environments without thermal shutdown |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with tin-plated leads, RoHS & halogen-free compliant |
Pinout & Package
SA15H is a two-terminal unidirectional TVS diode in DO-204AC (DO-15) package. Cathode is marked by a band on the body; anode is unmarked. Leads are pure tin-plated and solderable per J-STD-002. Polarity must be observed during PCB placement to ensure correct clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events |
| Cathode | Reverse clamping terminal | Connected to protected line (e.g., 12V rail); avalanches into conduction when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and infotainment power rails |
| 500W peak pulse rating | Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (load dump simulation) without degradation |
| <1.0ps response time | Clamps ESD transients (IEC 61000-4-2) before sensitive logic or analog circuitry sustains damage |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during surge, reducing margin required for downstream component voltage ratings |
| Halogen-free & RoHS compliant | Meets automotive OEM material compliance requirements (IEC 61249-2-21) and end-of-life recycling mandates |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator-induced surges. IC Role / Device Role: Unidirectional clamping element placed between power input and bulk capacitor. Use Value: Limits rail voltage to ≤26.9V during 500W transients, preventing damage to 36V-rated DC-DC converters and microcontrollers. | Use Scenario: Shielding 4–20mA current-loop sensor inputs from EFT bursts (IEC 61000-4-4) in factory automation PLC modules. IC Role / Device Role: Reverse-biased TVS shunting transients to ground before reaching op-amp input stage. Use Value: Sub-1μA leakage avoids offset error in precision current sensing; fast response preserves signal integrity during 5ns edge transients. |
| LED Lighting Driver Protection | Automotive CAN Bus Power Line Protection |
Use Scenario: Safeguarding constant-current LED drivers in headlamp modules from inductive kickback during PWM switching. IC Role / Device Role: Parallel-connected unidirectional TVS across driver output to clamp flyback spikes. Use Value: 26.9V clamping prevents MOSFET drain-source breakdown in 30V-rated drivers, extending lifetime under repeated switching stress. | Use Scenario: Guarding 5V CAN transceiver VCC pins against coupled transients from adjacent high-power circuits in vehicle gateways. IC Role / Device Role: Local TVS on transceiver power rail, positioned upstream of LDO regulator. Use Value: Ensures CAN communication remains functional during 10/1000μs surges up to 500W, meeting OEM EMC robustness targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | Same DO-214AC package; bidirectional; VBR = 16.7–18.5V; VC = 24.4V @ 21.0A | Supports bipolar transients but lacks AEC-Q101 qualification; higher leakage (~1μA @ 12V) | Preferred where bidirectional clamping is needed and automotive qualification is not mandatory |
| P6SMB15AH | DO-214AA package; unidirectional; VBR = 16.7–18.5V; VC = 24.4V @ 21.0A; AEC-Q101 qualified | Same qualification level but larger footprint; 600W rating offers higher surge margin | Selected when board space allows larger package and 600W surge headroom is required |
Compared with SMAJ15A and P6SMB15AH, SA15H provides identical AEC-Q101 compliance and clamping performance in a compact DO-15 form factor, making it optimal for space-constrained automotive modules where axial leaded mounting is preferred over surface-mount.
Availability
SA15H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver surge suppression requiring stable component supply across long production lifecycles.
Supply support for SA15H 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, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing low clamping voltage, high surge robustness, and long-term reliability under thermal cycling.
FAQ
What is the AEC-Q101 qualification status of SA15H?
The SA15H is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H", confirming full compliance with stress tests including temperature cycling, humidity bias HAST, and mechanical shock - validated for use in automotive powertrain and chassis systems. This qualification is documented in TSC's SA Series datasheet Version L2105 and applies specifically to SA15H, not generic SA15 variants.
What is the maximum clamping voltage of SA15H and under what test condition?
The SA15H has a maximum clamping voltage (VC) of 26.9 V, measured at 19.5 A peak pulse current using the standard 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during surge events.
Does SA15H support bidirectional transient suppression?
No, SA15H is a unidirectional TVS diode intended for DC rail protection where polarity is fixed. Its cathode band marking indicates polarity-sensitive installation. For bidirectional applications, TSC offers SA15CA (with "CA" suffix), which provides symmetrical clamping in both directions while maintaining the same VWM and VC ratings.
What is the thermal derating behavior of SA15H above 25°C ambient?
SA15H's peak pulse power rating decreases linearly above TA = 25°C per Figure 2 in the datasheet: at 75°C ambient, its 500W rating is reduced to approximately 350W, and at 125°C, it falls to ~175W. Derating ensures safe junction temperature (TJ ≤ 175°C) during repetitive surge events in high-temperature environments like engine compartments.
How does SA15H compare to SA15A in terms of electrical performance?
SA15H and SA15A share identical VWM (15 V), VBR (16.7–18.5 V), and VC (24.4 V) specifications, but SA15H adds AEC-Q101 qualification and tighter process controls for automotive use. SA15A is industrial-grade only; SA15H undergoes additional stress screening and traceability protocols required by Tier 1 automotive suppliers.
SA15H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA15H FAQ
1.How can I place an order for SA15H through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15H 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 SA15H reliable?
The price and inventory of SA15H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15H is usually 5 days.
3.What payment methods are accepted for SA15H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15H?
SA15H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15H 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 SA15H?
For technical support, including SA15H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15H requirements.
6.How does Aetrix verify that SA15H is sourced from the original manufacturer or authorized distributors?
All SA15H 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 SA15H meets industry standards.
7.What is the process for return or replacement of SA15H?
All SA15H units undergo pre-shipment inspection (PSI). If there is an issue with SA15H, 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 SA15H part is unused and in its original packaging.
Return procedure for SA15H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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