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Taiwan Semiconductor Corporation SA14C
- Part No.:
- SA14C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14C.pdf
- Description:
- 500W, 17.4V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,050
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Product details
Overview
SA14C 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 delivers fast response (<1.0ps), low leakage (<1μA @ >10V), and AEC-Q101 qualification for automotive-grade surge protection.
For engineers reviewing the SA14C datasheet, SA14C pinout, SA14C application, or SA14C equivalent, this device is selected for high-reliability DC power rail and signal line ESD/transient suppression where precise VWM margin, sub-26V clamping, and 175°C junction operation are required.
Technical Context
The SA14C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 15.6–19.1V breakdown range at 1mA test current. Its 25.8V clamping voltage at 20.3A (10/1000μs waveform) ensures downstream ICs remain below absolute maximum ratings during transients.
Designed for automotive and industrial environments, it supports continuous operation from –55°C to +175°C junction temperature, features pure tin-plated leads compliant with J-STD-002, and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin above 12V nominal systems. |
| VBR min/max | 15.6 / 19.1 V @ 1 mA - Breakdown occurs within this range; defines minimum trigger threshold and process spread control. |
| VC @ IPPM | 25.8 V @ 20.3 A - Clamped voltage during 10/1000μs surge; guarantees protected circuit stays ≤25.8V under worst-case 500W transient. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IR @ VWM | <1 μA - Reverse leakage at 14V; ensures negligible standby current drain in battery-powered or low-power circuits. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive placement without derating in high-ambient environments. |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Meets UL 94V-0, RoHS, and halogen-free (IEC 61249-2-21) requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return; completes clamping loop during transient events. |
| Cathode | Reverse-biased input / Protected line connection | Connected to the line being protected (e.g., 12V rail); conducts only when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power domains. |
| Clamping ratio VC/VBR | ~1.4–1.6 - Tight ratio ensures predictable overvoltage limiting with minimal headroom overhead. |
| Response time | <1.0 ps - Enables effective suppression of ESD (IEC 61000-4-2) and fast electrical fast transients (IEC 61000-4-4). |
| Low IR at VWM | <1 μA @ >10 V - Eliminates measurable leakage impact on precision voltage references or high-impedance sensor bias networks. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed microcontroller power supply in vehicle body control module exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp surges before they reach LDO input or MCU VDD pin. Use Value: 25.8V clamping ensures MCU remains within 30V absolute maximum rating; 175°C rating allows placement near hot ECUs. | Use Scenario: 4–20mA current loop transmitter connected to field sensors in factory automation, subject to cable-induced EFT bursts. IC Role / Device Role / Timing Role: TVS across loop supply terminals to absorb repetitive 5kHz EFT bursts per IEC 61000-4-4. Use Value: 500W peak power rating sustains repeated 10/1000μs surges without degradation; low IR avoids loop current error. |
| LED Driver Input Protection | Automotive CAN Transceiver Protection |
Use Scenario: Constant-current LED driver board powered from 24V truck battery, vulnerable to switching spikes from relay coils and alternator ripple. IC Role / Device Role / Timing Role: SA14C placed at DC input stage to shunt inductive kickback energy away from driver IC and MOSFET gate drivers. Use Value: 20.3A IPPM handles high-energy 8.3ms half-sine surges (IFSM = 70A); DO-15 package fits standard PCB footprints. | Use Scenario: CAN FD transceiver (e.g., TJA1057) in gateway ECU subjected to coupled transients on CAN_H/CAN_L lines per ISO 11898-2. IC Role / Device Role / Timing Role: One SA14C per line (CAN_H–GND, CAN_L–GND) providing unidirectional clamping to protect transceiver ESD structures. Use Value: Sub-1ps response captures fast edge transients before internal clamp diodes activate; 14V VWM avoids false triggering during common-mode noise. |
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 and higher VC (23.2V @ 22.6A) | Requires dual-line placement for unidirectional protection; less suitable for single-rail clamping where polarity matters | Select SMAJ14A only if bidirectional capability is needed or board layout already uses SMA footprint |
| P6SMB14A | DO-214AA package; identical VWM and VBR range, but lower PPK (600W vs. SA14C's 500W) and higher VC (23.2V @ 26A) | Higher surge rating but larger footprint; thermal performance differs due to package geometry and pad layout | Prefer P6SMB14A when legacy designs use SMB packages or require marginally higher peak power |
Compared with SMAJ14A and P6SMB14A, the SA14C offers tighter clamping (25.8V), AEC-Q101 qualification out-of-box, and DO-15 compatibility with established automotive board designs-making it optimal for new 12V system implementations requiring verified reliability and precise voltage coordination.
Availability
SA14C is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and LED driver input surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SA14C 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, serving global automotive, industrial, and consumer markets since 1979.
The SA Series TVS diodes are engineered specifically for high-energy transient suppression in harsh environments, with emphasis on AEC-Q101 compliance, tight parametric distribution, and robust package reliability for under-hood and factory-floor deployment.
FAQ
What is the breakdown voltage range of the SA14C?
The SA14C has a specified breakdown voltage (VBR) range of 15.6 V to 19.1 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures reliable triggering while maintaining sufficient margin above its 14 V working stand-off voltage. The SA14C must be used with appropriate series impedance to limit current during conduction.
Is the SA14C suitable for automotive applications?
Yes, the SA14C is AEC-Q101 qualified and designed for automotive use, supporting junction temperatures up to +175°C and meeting requirements for under-hood placement. Its DO-204AC package passes JESD201 Class 2 whisker testing and features pure tin plating for solderability. The SA14C is commonly deployed in body control modules, lighting drivers, and infotainment power supplies.
What is the clamping voltage of the SA14C under surge conditions?
The SA14C clamps to a maximum of 25.8 V at 20.3 A peak pulse current (10/1000μs waveform). This value is guaranteed across temperature and represents the upper limit of voltage seen by downstream circuitry during standardized surge events. Designers must verify that protected ICs have absolute maximum ratings exceeding 25.8 V.
Does the SA14C have polarity markings, and how is it oriented in-circuit?
Yes, the SA14C is unidirectional and marked with a cathode band on the DO-204AC package. The cathode terminal connects to the line being protected (e.g., 12V rail), and the anode connects to ground. Incorrect orientation prevents clamping action and may cause permanent failure under reverse surge conditions.
How does the SA14C compare to the SA14A variant?
The SA14C and SA14A share identical VWM (14 V) and package (DO-204AC), but differ in breakdown voltage: SA14C is 15.6–19.1 V, while SA14A is 15.6–17.2 V. The SA14A offers tighter VBR distribution and lower clamping voltage (23.2 V), making it preferable where precise threshold control is critical. The SA14C provides broader tolerance for cost-sensitive or high-volume applications.
SA14C 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:
- -
- Bidirectional Channels:
- 1
- 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)
SA14C FAQ
1.How can I place an order for SA14C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14C 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 SA14C reliable?
The price and inventory of SA14C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14C is usually 5 days.
3.What payment methods are accepted for SA14C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14C?
SA14C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14C 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 SA14C?
For technical support, including SA14C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14C requirements.
6.How does Aetrix verify that SA14C is sourced from the original manufacturer or authorized distributors?
All SA14C 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 SA14C meets industry standards.
7.What is the process for return or replacement of SA14C?
All SA14C units undergo pre-shipment inspection (PSI). If there is an issue with SA14C, 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 SA14C part is unused and in its original packaging.
Return procedure for SA14C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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