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Taiwan Semiconductor Corporation SA14A
- Part No.:
- SA14A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14A.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,246
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Product details
Overview
SA14A 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 14V working stand-off voltage (VWM), 15.6–17.2V breakdown voltage (VBR), and 22.6A peak pulse current (IPPM). It protects automotive and industrial power rails against ESD and inductive switching transients.
For engineers reviewing the SA14A datasheet, SA14A pinout, SA14A application, or SA14A equivalent, this page delivers verified electrical parameters, clamping behavior under surge, thermal derating guidance, AEC-Q101 qualification status, and real-world protection use cases for 12V system interfaces.
Technical Context
The SA14A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR range (15.6–17.2V @ 1mA), clamping transients to ≤23.2V at 22.6A. Its fast response (<1.0ps from 0V to VBR) ensures protection before sensitive downstream ICs experience overvoltage stress.
Designed for 12V nominal systems, it supports steady-state dissipation of 3W at TL = 75°C on 10×10 mm copper pads and withstands 70A non-repetitive forward surge (8.3ms half-sine). Junction temperature range is –55°C to +175°C, enabling under-hood automotive deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins; matches 12V rail with margin |
| VBR min/max | 15.6 / 17.2 V @ 1 mA - Confirmed breakdown threshold ensuring reliable turn-on without premature conduction |
| VC @ IPPM | 23.2 V @ 22.6 A - Clamped voltage during full 500W surge; limits downstream stress to safe levels |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; meets IEC 61000-4-5 Level 4 |
| IR @ VWM | <1 μA - Negligible leakage at 14V, preventing battery drain in always-on circuits |
| TJ max | +175 °C - Enables placement near heat sources in engine control units and lighting modules |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with UL 94V-0 rating and pure tin-plated leads compliant with J-STD-002 solderability. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / low-side reference | Connected to ground or low-voltage return; defines unidirectional polarity |
| Cathode | Transient clamp node / high-side connection | Connected to protected line (e.g., 12V supply); conducts surge current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and lighting modules |
| 500W surge capability | Withstands IEC 61000-4-5 10/1000μs surges up to 500W without degradation |
| Clamping voltage ≤23.2V | Ensures downstream 16V-tolerant ICs remain within absolute maximum ratings during transients |
| Leakage <1μA @ 14V | Prevents measurable standby current in always-on vehicle networks (e.g., CAN wake-up lines) |
| DO-15 mechanical robustness | Meets JESD201 Class 2 whisker resistance and 0.4g weight constraint for vibration-prone mounting |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed ECU power input subjected to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy to ground before it reaches LDOs and microcontrollers. Use Value: Limits voltage excursion to ≤23.2V during 500W surges, preserving 28V-rated power management ICs and meeting ISO 7637-2 Pulse 5a requirements. | Use Scenario: 4–20mA current loop transmitter exposed to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff protector on loop supply line, absorbing fast transients before analog front-end amplifiers. Use Value: Sub-1.0ps response ensures clamping initiates before 10ns ESD events damage precision op-amps or ADC inputs. |
| LED Lighting Driver Input Protection | Automotive CAN Transceiver Bus Line Protection |
Use Scenario: Constant-current LED driver powered from vehicle battery with frequent ignition cycling. IC Role / Device Role / Timing Role: Primary surge suppression on DC input rail, placed upstream of buck controller and gate drivers. Use Value: Withstands repeated 70A forward surge (8.3ms) from inductive loads while maintaining <1μA leakage to avoid dimming drift. | Use Scenario: CAN H/L bus lines in junction box modules exposed to cable coupling and hot-swap transients. IC Role / Device Role / Timing Role: Unidirectional clamp on CAN supply (VCC) rail, not signal lines-used where local 12V bias must survive load dump. Use Value: 175°C max junction temperature allows co-location with CAN transceivers in thermally dense modules without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A | Same DO-214AC package; 15.6–17.2V VBR, but lower PPK (400W) and higher VC (25.8V @ 17.3A) | Not AEC-Q101 qualified; suited for commercial-grade industrial equipment only | Select SMAJ14A only if automotive qualification is unnecessary and board space permits SMA footprint |
| P6KE15A | DO-15 package; 16.7–18.5V VBR, 500W PPK, but slower response (~1ns) and no AEC-Q101 validation | Lacks automotive reliability documentation; higher clamping (24.4V) reduces safety margin for 16V-tolerant ICs | Choose P6KE15A only for cost-sensitive non-automotive designs where full AEC-Q101 traceability is not required |
Compared with SMAJ14A and P6KE15A, the SA14A delivers tighter VBR tolerance, lower clamping voltage, and certified AEC-Q101 compliance-making it the preferred choice for automotive 12V rail protection where reliability and specification margin are critical.
Availability
SA14A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, LED lighting drivers, and CAN subsystem power rail protection requiring stable component supply across long production lifecycles.
Supply support for SA14A 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 robust transient suppression in harsh automotive environments, emphasizing AEC-Q101 qualification, high-temperature operation, and precise clamping performance across 5–170V VWM range.
FAQ
What is the clamping voltage of the SA14A under full 500W surge conditions?
The SA14A clamps to a maximum of 23.2 V when subjected to its rated peak pulse current of 22.6 A (corresponding to 500W at 10/1000μs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees downstream circuit protection within safe voltage margins for 16V-rated ICs. The SA14A achieves this clamping performance while maintaining low dynamic impedance and sub-nanosecond response.
Is the SA14A qualified for automotive applications?
Yes, the SA14A is AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor SA Series datasheet (Version L2105). This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life-ensuring reliability in under-hood and chassis-mounted automotive electronics. The SA14A's 175°C max junction temperature further supports this automotive suitability.
What is the difference between SA14 and SA14A?
The SA14A offers tighter breakdown voltage tolerance (15.6–17.2 V) compared to SA14 (15.6–19.1 V), resulting in more consistent clamping behavior and reduced risk of premature conduction. Both share identical package (DO-15), power rating (500W), and thermal specs, but SA14A's narrower VBR range improves design predictability in precision 12V rail protection. The SA14A is the recommended variant for new automotive designs.
Can the SA14A be used in bidirectional configurations?
No, the SA14A is a unidirectional TVS diode and must be used with correct polarity-cathode toward the protected line, anode to ground. For bidirectional protection, Taiwan Semiconductor specifies CA-suffixed variants (e.g., SA14CA) or explicitly bipolar parts. Using SA14A in reverse-biased mode risks permanent failure due to lack of symmetrical avalanche structure.
What is the maximum steady-state power dissipation for the SA14A?
The SA14A has a steady-state power dissipation (PD) rating of 3 W when mounted on 10 × 10 mm copper pads per lead at TL = 75°C. This value assumes proper PCB thermal relief and is distinct from its 500W non-repetitive surge rating. Continuous power handling remains limited by junction-to-lead thermal resistance; exceeding 3W risks thermal runaway even if peak surge ratings are not violated.
SA14A 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 22.6A
- 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)
SA14A FAQ
1.How can I place an order for SA14A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14A 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 SA14A reliable?
The price and inventory of SA14A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14A is usually 5 days.
3.What payment methods are accepted for SA14A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14A?
SA14A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14A 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 SA14A?
For technical support, including SA14A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14A requirements.
6.How does Aetrix verify that SA14A is sourced from the original manufacturer or authorized distributors?
All SA14A 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 SA14A meets industry standards.
7.What is the process for return or replacement of SA14A?
All SA14A units undergo pre-shipment inspection (PSI). If there is an issue with SA14A, 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 SA14A part is unused and in its original packaging.
Return procedure for SA14A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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