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Taiwan Semiconductor Corporation SA15AH
- Part No.:
- SA15AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA15AH.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,614
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Product details
Overview
SA15AH from Taiwan Semiconductor is a unidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, 15V working stand-off voltage, and clamping voltage of 26.9V at 19.5A peak pulse current. It protects automotive and industrial power rails against ESD, EFT, and inductive switching transients.
For engineers reviewing the SA15AH datasheet, SA15AH pinout, SA15AH application, or SA15AH equivalent, key selection criteria include its AEC-Q101 qualification, 175°C max junction temperature, low 1μA reverse leakage at 15V, fast <1.0ps response time, and DO-15 mechanical compatibility with legacy through-hole layouts.
Technical Context
The SA15AH operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 16.7–20.4V breakdown range (tested at 1mA). Its clamping action limits transient-induced voltage to ≤26.9V at 19.5A, enabling robust protection of 12V automotive systems and 15V industrial control inputs.
Designed for non-repetitive surge events per IEC 61000-4-2/4-4/4-5, it features low dynamic impedance and thermal stability up to 175°C junction temperature, with derating applied above 25°C ambient per Fig.2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 16.7 / 20.4 V - Breakdown voltage range at 1 mA test current; defines turn-on threshold tolerance |
| VC @ IPPM | 26.9 V - Clamped voltage at 19.5 A peak pulse current; determines protected circuit's maximum overvoltage stress |
| PPK | 500 W - Peak pulse power handling at 10/1000μs waveform; supports ISO 7637-2 Pulse 1/2a/2b immunity |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| IR @ VWM | <1 μA - Reverse leakage at 15 V; ensures minimal standby power loss in always-on systems |
| Package | DO-204AC (DO-15) - Standard through-hole package with 0.400g mass and UL 94V-0 molding compound |
Pinout & Package
DO-204AC (DO-15) package with axial leads: cathode indicated by band marking; anode and cathode terminals support unidirectional transient suppression in series with power or signal lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Source side | Connected to protected line (e.g., battery rail or signal source); carries surge current into device during clamping |
| Cathode | Output/Ground side | Connected to ground or low-impedance return path; establishes polarity-sensitive clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| 500W peak pulse rating | Withstands ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2a (battery disconnect) without failure |
| <1.0ps response time | Clamps transients before sensitive ICs experience damaging overvoltage-critical for CAN/LIN bus protection |
| UL 94V-0 molding compound | Meets flammability requirements for enclosed automotive and industrial enclosures |
| Pure tin-plated leads | Ensures reliable solderability per J-STD-002 and compatibility with lead-free reflow and wave processes |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Limits voltage to ≤26.9V during 19.5A surges, preventing damage to downstream LDOs and microcontrollers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting transients to chassis ground before signal conditioning circuitry. Use Value: Sub-1.0ps response ensures clamping occurs before 15V-rated op-amps or ADC inputs exceed absolute maximum ratings. |
| LED Driver Overvoltage Suppression | PLC Digital Input Protection |
Use Scenario: Safeguarding constant-current LED drivers in automotive lighting modules from inductive kickback. IC Role / Device Role / Timing Role: Placed across driver output terminals to clamp flyback voltage spikes during MOSFET switching. Use Value: 500W rating absorbs energy from high-di/dt inductive loads without thermal runaway, extending driver lifetime. | Use Scenario: Hardening 24V digital input channels on programmable logic controllers against field-wiring transients. IC Role / Device Role / Timing Role: Series-connected TVS on input line, referenced to common-mode ground to suppress common-mode surges. Use Value: 15V VWM aligns with 24V system logic thresholds while allowing margin for normal ripple; clamping at 26.9V prevents input latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ15A | Same DO-214AC package; 15V VWM, 24.4V [email protected]; AEC-Q101 qualified; slightly lower clamping voltage but 400W rating | Lower peak power may limit use in high-energy load-dump scenarios where SA15AH's 500W is required | Select SMAJ15A only if layout constraints demand SMD mounting or if system-level testing confirms 400W suffices |
| ON Semiconductor 1.5SMC15AH | DO-214AB package; 15V VWM, 24.4V [email protected]; AEC-Q101 qualified; same 500W rating but surface-mount form factor | Not pin-compatible-requires PCB redesign from through-hole DO-15 to SMC footprint | Choose 1.5SMC15AH only for new SMT designs prioritizing board space and automated assembly over legacy through-hole compatibility |
Compared with SMAJ15A and 1.5SMC15AH, the SA15AH uniquely combines AEC-Q101 qualification, 500W rating, and DO-204AC through-hole packaging-making it the preferred choice for cost-sensitive, high-reliability automotive and industrial replacements where mechanical robustness and legacy layout reuse are critical.
Availability
SA15AH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver overvoltage suppression, and PLC digital input protection requiring stable component supply across production lifecycles.
Supply support for SA15AH 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 high-reliability transient suppression in harsh environments, emphasizing AEC-Q101 compliance, wide VWM coverage (5–170V), and robust DO-15 packaging for under-hood and factory-floor deployment.
FAQ
What is the breakdown voltage range of the SA15AH?
The SA15AH has a minimum breakdown voltage (VBR) of 16.7 V and a maximum of 20.4 V, measured at 1 mA test current. This range ensures consistent clamping behavior across production lots while accommodating manufacturing tolerances and thermal drift within its -55°C to +175°C operating junction temperature range.
Is the SA15AH suitable for automotive applications?
Yes, the SA15AH is AEC-Q101 qualified and designed for automotive use. Its 175°C maximum junction temperature, DO-204AC mechanical robustness, and 500W surge capability meet requirements for engine control units, body electronics, and lighting modules exposed to ISO 7637-2 transients and under-hood thermal stress.
What is the clamping voltage of the SA15AH at its rated peak pulse current?
The SA15AH clamps to a maximum of 26.9 V at its rated peak pulse current of 19.5 A (10/1000μs waveform). This value defines the upper voltage limit imposed on protected circuits during worst-case surge events and is critical for ensuring downstream components remain within their absolute maximum voltage ratings.
Does the SA15AH have polarity markings, and how is it installed?
Yes, the SA15AH features a cathode band marking on the DO-204AC (DO-15) package. It must be installed with the banded end connected toward the ground or low-impedance return path, and the unbanded (anode) end toward the protected line-ensuring correct unidirectional clamping direction for 15V stand-off operation.
How does the SA15AH compare to the SA15A variant?
The SA15AH is the AEC-Q101-qualified version of the SA15A, sharing identical electrical parameters (VWM = 15 V, VBR = 16.7–20.4 V, VC = 26.9 V) and DO-204AC packaging. The "H" suffix denotes additional automotive qualification testing-including temperature cycling, humidity bias HAST, and mechanical shock-making SA15AH mandatory for automotive Tier 1 applications where SA15A is not permitted.
SA15AH 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:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 21A
- 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)
SA15AH FAQ
1.How can I place an order for SA15AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15AH 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 SA15AH reliable?
The price and inventory of SA15AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15AH is usually 5 days.
3.What payment methods are accepted for SA15AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15AH?
SA15AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15AH 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 SA15AH?
For technical support, including SA15AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15AH requirements.
6.How does Aetrix verify that SA15AH is sourced from the original manufacturer or authorized distributors?
All SA15AH 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 SA15AH meets industry standards.
7.What is the process for return or replacement of SA15AH?
All SA15AH units undergo pre-shipment inspection (PSI). If there is an issue with SA15AH, 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 SA15AH part is unused and in its original packaging.
Return procedure for SA15AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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