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Taiwan Semiconductor Corporation SA15
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- Part No.:
- SA15
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA15.pdf
- Description:
- 500W, 18.6V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,700
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Product details
Overview
SA15 from Taiwan Semiconductor is a 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 clamping voltage (VC) at 19.5A peak pulse current-designed for automotive lighting and ESD protection of microcontrollers and communication interfaces.
For engineers reviewing the SA15 datasheet, SA15 pinout, SA15 application, or SA15 equivalent, this page delivers verified electrical parameters, thermal limits, clamping behavior under surge, polarity marking, and AEC-Q101 qualification status to support robust overvoltage design in automotive and industrial control systems.
Technical Context
The SA15 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. Its low leakage (<1μA @ 15V) ensures minimal standby power loss in always-on circuits.
Designed for 10/1000μs waveform compliance per IEC 61000-4-5, it sustains 175°C junction temperature and meets JESD201 Class 2 whisker resistance-critical for under-hood automotive modules where thermal cycling and mechanical reliability are non-negotiable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before conduction begins; sets system-level surge immunity threshold. |
| VBR min/max | 16.7 / 20.4 V @ 1 mA - Confirmed breakdown window ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 26.9 V @ 19.5 A - Clamping voltage during 10/1000μs surge defines maximum stress on downstream ICs like CAN transceivers or MCU I/O. |
| PPK | 500 W - Peak pulse power rating determines survivability against lightning-induced surges in 12V/24V vehicle subsystems. |
| TJ max | 175 °C - Enables placement near heat sources (e.g., power converters) without derating in engine control units. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage preserves battery life in always-connected telematics modules. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package compatible with legacy through-hole assembly and automated tape-and-reel handling. |
Pinout & Package
DO-204AC (DO-15) package with axial leads: cathode identified by band marking; anode and cathode terminals support unidirectional surge shunting from line-to-ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to system ground or low-impedance reference plane to complete clamping current loop during transient events. |
| Cathode | Protected line input | Connected to signal/power line being protected; polarity-sensitive-reverse connection disables clamping function. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and lighting modules per stress test requirements. |
| Fast response time | <1.0 ps from 0 V to VBR - Ensures suppression initiates before sensitive logic thresholds are exceeded during ESD events. |
| Low impedance surge path | Clamps 19.5A surge to 26.9V - Limits energy dissipation in protected ICs and avoids latch-up in CMOS interfaces. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive - Supports environmentally regulated supply chains and end-of-life recycling. |
Applications
| Automotive Lighting Control | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from load-dump transients in 12V headlamp modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive-going spikes up to 500W. Use Value: Prevents permanent damage to high-side switches during alternator load dump (ISO 7637-2 Pulse 5a), extending module lifetime beyond 10-year vehicle service life. | Use Scenario: Shielding RS-485 transceivers and analog sensor front-ends from EFT bursts in factory automation PLC I/O cards. IC Role / Device Role / Timing Role: Line-to-ground TVS on differential bus lines to absorb 4kV/5kHz EFT pulses per IEC 61000-4-4. Use Value: Maintains data integrity during electromagnetic interference events without requiring system reset or retransmission. |
| Automotive Body Control Module (BCM) | Power Supply Input Stage |
Use Scenario: Safeguarding microcontroller GPIOs and LIN transceivers from ISO 10605 ESD discharges in door module assemblies. IC Role / Device Role / Timing Role: Localized TVS on each protected signal line, leveraging sub-nanosecond response to limit voltage overshoot. Use Value: Achieves >15kV contact discharge immunity without degrading signal rise time on 200kbps LIN buses. | Use Scenario: Front-end surge suppression on 24V DC input of industrial motor drives exposed to inductive switching noise. IC Role / Device Role / Timing Role: Primary clamping device in series with bulk capacitance to limit peak rail voltage during 10/1000μs surges. Use Value: Reduces need for oversized input capacitors and secondary regulation stages by holding rail voltage below 30V during 500W transients. |
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; bidirectional; 15V VWM; 24.4V VC @ 21A; AEC-Q101 qualified. | Bidirectional operation suits AC-coupled or dual-polarity signal lines; not suitable for DC-biased unidirectional rails without redesign. | Select SMAJ15A only if bidirectional clamping is required; SA15 offers lower clamping voltage in unidirectional configuration. |
| ON Semiconductor 1.5SMC15A | DO-214AB package; bidirectional; 15V VWM; 24.4V VC @ 21A; no AEC-Q101 documentation in public datasheet. | Larger footprint and higher thermal resistance than DO-15; lacks automotive qualification evidence for safety-critical use. | Prefer SA15 for space-constrained automotive PCBs requiring documented AEC-Q101 compliance and axial lead compatibility. |
Compared with SMAJ15A and 1.5SMC15A, the SA15 provides unidirectional clamping in a smaller DO-15 package with verified AEC-Q101 qualification-enabling tighter layout control and assured reliability in automotive power domains where polarity is fixed and qualification traceability is mandatory.
Availability
SA15 is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface protection, and body control module designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant surge suppression.
Supply support for SA15 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 automotive electronics, emphasizing AEC-Q101 qualification, tight VBR tolerances, and robust surge endurance in DO-15 packaging.
FAQ
What is the clamping voltage of the SA15 under a 10/1000μs surge?
The SA15 clamps to a maximum of 26.9 V at 19.5 A peak pulse current under the standard 10/1000μs waveform. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during surge events-critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SA15 unidirectional or bidirectional?
The SA15 is a unidirectional TVS diode, intended for DC-biased applications where surge polarity is known and consistent. Its cathode band marking indicates polarity, and it conducts only when reverse-biased beyond its breakdown voltage-unlike bidirectional variants such as SA15A, which protect both polarities.
Does the SA15 meet AEC-Q101 qualification standards?
Yes, the SA15 is AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor SA Series datasheet (Version L2105). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD-making SA15 suitable for automotive powertrain, chassis, and body electronics applications.
What is the maximum junction temperature rating for the SA15?
The SA15 has a maximum junction temperature (TJ MAX) of 175°C, enabling reliable operation in high-ambient environments such as engine compartments or enclosed industrial enclosures. This rating supports continuous operation at full power derating curves up to 125°C ambient, with appropriate PCB copper area for thermal dissipation.
How does the SA15 differ from the SA15A variant?
The SA15A is the bidirectional version of the same voltage grade, offering symmetrical clamping for AC or floating signal lines. While both share 15V VWM and AEC-Q101 qualification, SA15A has slightly higher clamping voltage (24.4V vs. 26.9V) and different VBR range (16.7–18.5V); SA15 is optimized for unidirectional DC rails where lower clamping and tighter VBR tolerance are prioritized.
SA15 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA15 FAQ
1.How can I place an order for SA15 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15 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 SA15 reliable?
The price and inventory of SA15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15 is usually 5 days.
3.What payment methods are accepted for SA15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15?
SA15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15 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 SA15?
For technical support, including SA15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15 requirements.
6.How does Aetrix verify that SA15 is sourced from the original manufacturer or authorized distributors?
All SA15 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 SA15 meets industry standards.
7.What is the process for return or replacement of SA15?
All SA15 units undergo pre-shipment inspection (PSI). If there is an issue with SA15, 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 SA15 part is unused and in its original packaging.
Return procedure for SA15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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