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Taiwan Semiconductor Corporation SA14
- Part No.:
- SA14
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14.pdf
- Description:
- 500W, 17.4V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,876
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Product details
Overview
SA14 from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 14V working stand-off voltage (VWM), 15.6–19.1V breakdown voltage (VBR @ 1mA), and 25.8V clamping voltage (VC) at 20.3A peak pulse current. It protects automotive and industrial power rails against ESD, EFT, and inductive switching transients.
For engineers reviewing the SA14 datasheet, SA14 pinout, SA14 application, or SA14 equivalent, this page delivers verified electrical parameters, clamping performance under 10/1000μs surge, thermal limits up to 175°C junction temperature, and AEC-Q101 qualification status for automotive-grade reliability assessment.
Technical Context
The SA14 operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its VBR range (15.6–19.1V) and clamping transients to ≤25.8V at 20.3A. Its low leakage (<1μA @ 14V) ensures minimal standby power loss in always-on circuits.
Designed for single-polarity DC protection, it features fast response (<1.0ps from 0V to VBR), 500W peak pulse power rating per 10/1000μs waveform, and meets UL 94V-0 flammability requirements in its molded DO-204AC package with pure tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR min/max | 15.6 / 19.1 V @ 1 mA - Breakdown threshold range; determines earliest clamping onset under surge. |
| VC @ IPPM | 25.8 V @ 20.3 A - Clamped voltage during 10/1000μs surge; sets worst-case overvoltage seen by protected IC. |
| PPK | 500 W - Peak surge power handling capability; validates robustness against IEC 61000-4-5 Level 4 surges. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off voltage; ensures negligible quiescent current in battery-powered systems. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with 0.400g mass; compatible with through-hole reflow and wave soldering. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / Ground reference | Connected to system ground or low-side return; carries surge current to earth during clamping. |
| Cathode | Protected line input / High-side connection | Connected to the line being protected (e.g., 12V rail); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring high-reliability surge immunity. |
| 500W 10/1000μs surge rating | Withstands IEC 61000-4-5 Level 4 (4kV) surges without degradation when mounted per JEDEC standards. |
| Clamping voltage ≤25.8V at 20.3A | Ensures downstream 3.3V/5V logic ICs remain within absolute maximum ratings during transient events. |
| Response time <1.0ps | Activates faster than most microsecond-scale transients, preventing voltage overshoot before protection engages. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained supply chains. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12V battery-supplied ECUs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp positive transients. Use Value: Limits voltage to ≤25.8V during 10/1000μs surges, protecting CAN transceivers and MCU power pins from damage. | Use Scenario: 24V DC digital input modules receiving signals from field sensors in factory automation. IC Role / Device Role / Timing Role: Standoff protector on dry-contact inputs subject to inductive kickback from solenoids and relays. Use Value: Absorbs 500W surges without failure, maintaining signal integrity and eliminating false triggering due to EFT. |
| LED Driver Overvoltage Clamp | ESD-Sensitive Interface Protection |
Use Scenario: Constant-current LED drivers in automotive lighting subjected to alternator ripple and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on driver IC supply pin to prevent latch-up or gate oxide rupture. Use Value: Clamps 14V nominal rail to 25.8V during 100V+ transients, preserving driver FET reliability over 10,000+ cycles. | Use Scenario: USB or RS-485 ports on industrial HMIs exposed to human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Secondary-level TVS on data lines referenced to local ground plane. Use Value: Sub-1.0ps response captures ESD energy before it reaches transceiver ESD diodes, reducing cumulative stress. |
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; 14V VWM but bidirectional configuration; higher IR (≤5μA @ 14V). | Requires dual-rail or AC-coupled signal protection; not suitable for unidirectional DC rail clamping without redesign. | Select SMAJ14A only if bipolar surge immunity (e.g., RS-485 bus) is required; SA14 offers lower leakage and AEC-Q101 validation. |
| P6KE15A | DO-15 package; 15V VWM; 600W rating but slower response (~1ns); no AEC-Q101 qualification. | Lacks automotive qualification and tighter VBR tolerance; higher clamping voltage (24.4V @ 22.5A) reduces safety margin. | Prefer SA14 where automotive compliance, precise clamping, and sub-nanosecond response are mandatory. |
Compared with SMAJ14A and P6KE15A, the SA14 provides superior automotive qualification, lower leakage (<1μA), tighter VBR tolerance (±11%), and guaranteed <1.0ps response-making it optimal for safety-critical 12V/24V DC rail protection where reliability and precision clamping are non-negotiable.
Availability
SA14 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, LED lighting drivers, and ESD-sensitive interface modules requiring stable component supply across multi-year production cycles.
Supply support for SA14 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, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices.
The SA Series was engineered specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, tight parametric tolerances, and robust surge endurance in standard DO-204AC packaging.
FAQ
What is the exact breakdown voltage range of the SA14?
The SA14 has a specified breakdown voltage (VBR) range of 15.6 V to 19.1 V measured at 1 mA test current (IT), per the manufacturer's published electrical characteristics table. This range reflects process variation and ensures reliable triggering across production lots while maintaining compatibility with 14 V nominal systems. The SA14 datasheet confirms this value applies to unidirectional operation only.
Is the SA14 AEC-Q101 qualified?
Yes, the SA14 is AEC-Q101 qualified when ordered with the "H" suffix (e.g., SA14H). The base SA14 part is not automatically qualified; qualification requires explicit ordering code confirmation. AEC-Q101 testing includes stress tests for high-temperature operating life, temperature cycling, and ESD robustness-critical for automotive under-hood deployment. Always verify the full orderable part number matches qualification requirements.
What is the clamping voltage of the SA14 at its rated peak pulse current?
The SA14 clamps to a maximum of 25.8 V at its rated peak pulse current (IPPM) of 20.3 A under the standardized 10/1000 μs double-exponential surge waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. It directly determines whether downstream components remain within their absolute maximum voltage ratings.
Can the SA14 be used in bidirectional applications?
No, the SA14 is a unidirectional TVS diode and must not be used in bidirectional signal paths. Its cathode band marking indicates polarity, and it conducts only during reverse overvoltage conditions. For bidirectional protection (e.g., RS-485, USB), use the SA14A variant or other explicitly bidirectional parts like SMAJ14A. Using SA14 in AC or bipolar configurations risks forward conduction and failure during normal operation.
What is the maximum junction temperature rating for the SA14?
The SA14 has a maximum junction temperature (TJ MAX) rating of +175 °C, enabling reliable operation in high-ambient environments such as automotive engine compartments or industrial enclosures. This rating assumes proper PCB thermal relief-specifically, mounting on 10 × 10 mm copper pads per terminal per JEDEC guidelines. Exceeding TJ MAX risks permanent parametric shift or catastrophic failure of the SA14 device.
SA14 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:
- 25.8V
- Current - Peak Pulse (10/1000µs):
- 20.3A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- 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)
SA14 FAQ
1.How can I place an order for SA14 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14 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 SA14 reliable?
The price and inventory of SA14 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14 is usually 5 days.
3.What payment methods are accepted for SA14?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14?
SA14 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14 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 SA14?
For technical support, including SA14 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14 requirements.
6.How does Aetrix verify that SA14 is sourced from the original manufacturer or authorized distributors?
All SA14 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 SA14 meets industry standards.
7.What is the process for return or replacement of SA14?
All SA14 units undergo pre-shipment inspection (PSI). If there is an issue with SA14, 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 SA14 part is unused and in its original packaging.
Return procedure for SA14:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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