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Taiwan Semiconductor Corporation SA14H
- Part No.:
- SA14H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14H.pdf
- Description:
- 500W, 17.4V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,355
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Product details
Overview
SA14H from Taiwan Semiconductor is an AEC-Q101 qualified unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, designed for automotive and industrial overvoltage protection. It features a 14 V working stand-off voltage (VWM), 15.6–19.1 V breakdown voltage (VBR @ 1 mA), 25.8 V maximum clamping voltage (VC) at 20.3 A peak pulse current, and 500 W peak pulse power rating at 10/1000 µs waveform.
For engineers reviewing the SA14H datasheet, SA14H pinout, SA14H application, or SA14H equivalent, this device is selected for robust ESD and electrical fast transient (EFT) immunity in 12 V automotive subsystems, DC power rail protection, and sensitive IC interface safeguarding where low leakage (<1 µA @ 14 V), fast response (<1 ps), and high surge tolerance are required.
Technical Context
The SA14H operates as a unidirectional avalanche diode with silicon planar junction construction, optimized for clamping transients on positive-polarity DC lines. Its VBR min/max range (15.6–19.1 V) ensures reliable turn-on above 14 V nominal rail while maintaining margin against false triggering.
It delivers 25.8 V clamping at 20.3 A IPPM under 10/1000 µs surge, with thermal derating to 3 W steady-state power at TL = 75 °C on 10 × 10 mm copper pads. Junction temperature range spans –55 °C to +175 °C, supporting under-hood automotive deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets operating margin for 12 V automotive systems. |
| VBR @ IT=1 mA | 15.6–19.1 V - Breakdown onset range; guarantees reliable clamping initiation above system nominal voltage with production tolerance. |
| VC @ IPPM=20.3 A | 25.8 V - Clamped voltage during 10/1000 µs surge; defines maximum stress imposed on protected downstream circuitry. |
| PPK | 500 W - Peak pulse power handling per single non-repetitive event; validates survivability against ISO 7637-2 Pulse 1/2a/3a transients. |
| IR @ VWM | <1 µA - Reverse leakage at 14 V; ensures negligible standby current drain in always-on vehicle modules. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near heat sources in engine control units and body electronics. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding, and JESD201 Class 2 whisker resistance. |
Pinout & Package
SA14H is a two-terminal unidirectional TVS diode in DO-204AC (DO-15) package. Cathode is marked by a band on the body; anode is unmarked. Leads are pure tin-plated and solderable per J-STD-002. Polarity must be observed during PCB layout to ensure correct clamping direction on positive-rail applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; completes clamping loop when cathode is tied to protected line. |
| Cathode | High-side surge input terminal | Connected to protected signal or power line; conducts avalanche current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| 500 W peak pulse power | Withstands ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2a (battery disconnect) without degradation. |
| <1 ps response time (0 V → VBR) | Clamps transients before sensitive logic or analog circuitry experiences damaging overvoltage-critical for CAN/LIN bus protection. |
| <1 µA IR @ VWM | Minimizes quiescent current in always-on modules (e.g., remote keyless entry, telematics), preserving battery life. |
| DO-204AC mechanical robustness | UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance support long-term reliability in harsh environments. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V PLC Input Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and LIN transceivers from load dump and EFT in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN bus line and ground to clamp negative-going transients and positive surges up to 500 W. Use Value: Limits clamped voltage to 25.8 V, ensuring protected transceiver remains within absolute maximum ratings during ISO 16750-2 load dump events. |
Use Scenario: Safeguarding optocoupler inputs on 24 V digital input cards exposed to field wiring transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on each channel's input node, shunting surge energy before it reaches isolation barrier. Use Value: Sub-µA leakage avoids false triggering of high-impedance input circuits; DO-15 package allows through-hole mounting compatible with legacy industrial PCBs. |
| Automotive Lighting Driver | DC Power Rail Surge Suppression |
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers in headlamp control units subjected to alternator ripple and switching noise. IC Role / Device Role / Timing Role: TVS placed across driver supply pins (VDD-to-GND) to absorb repetitive low-energy spikes from PWM dimming and inductive loads. Use Value: 175 °C max junction temperature supports operation adjacent to high-power LED heatsinks without thermal derating penalties. |
Use Scenario: Clamping induced surges on 12 V main distribution rail in infotainment head units connected to vehicle battery. IC Role / Device Role / Timing Role: Primary front-end TVS on main power entry point, coordinated with downstream polymer PTC and filtering. Use Value: 20.3 A IPPM and 25.8 V VC ensure downstream DC/DC converters and processors see no more than safe overvoltage excursion during ISO 7637-2 Pulse 5a. |
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 | Unidirectional, DO-214AC (SMA) package, 14 V VWM, 27.2 V VC @ 15.1 A, 400 W PPK. | Lower peak power and clamping voltage margin; surface-mount only; not AEC-Q101 qualified. | Select SMAJ14A only for space-constrained consumer or industrial boards where AEC-Q101 is not mandated and 400 W surge capacity suffices. |
| P6SMB14A | Unidirectional, DO-214AA (SMB) package, 14 V VWM, 23.2 V VC @ 17.3 A, 600 W PPK, AEC-Q101 option available (P6SMB14AH). | Higher PPK and lower VC, but SMB footprint differs; thermal performance differs due to smaller pad area. | P6SMB14AH offers superior clamping and same qualification; requires PCB redesign for SMB vs. DO-15 lead spacing and pad layout. |
Compared with SA14H, SMAJ14A provides smaller footprint but reduced surge capability and no automotive qualification, while P6SMB14AH delivers higher power handling and tighter clamping but demands layout revision for SMB packaging-making SA14H optimal for cost-sensitive, through-hole automotive designs requiring proven DO-15 integration.
Availability
SA14H is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controller (PLC) inputs, and DC power rail surge protection requiring stable component supply, AEC-Q101 compliance, and DO-204AC mechanical compatibility.
Supply support for SA14H 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, with global distribution and AEC-Q101 validation capabilities.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing high surge robustness, low leakage, and extended temperature operation in harsh environments.
FAQ
What is the polarity configuration of SA14H?
The SA14H is a unidirectional TVS diode with cathode indicated by a band on the DO-204AC body. It conducts only when cathode voltage exceeds anode voltage by ≥VBR, making it suitable for clamping positive transients on grounded-return systems. This polarity must be correctly oriented during PCB assembly to ensure effective protection of 12 V automotive rails and other DC lines.
Does SA14H meet AEC-Q101 requirements?
Yes, SA14H is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H" and documentation (Version L2105). It undergoes stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD per AEC-Q101 standard, confirming suitability for automotive powertrain, chassis, and body electronics applications.
What is the maximum clamping voltage of SA14H under surge conditions?
The SA14H has a maximum clamping voltage (VC) of 25.8 V at 20.3 A peak pulse current (IPPM) under the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is validated per ANSI/IEEE C62.35.
Can SA14H be used in bidirectional protection applications?
No, SA14H is unidirectional only. For bidirectional protection, Taiwan Semiconductor offers the SA14CA variant (not SA14H), which uses a center-tapped or symmetrical structure to clamp both polarities. Using SA14H in bidirectional configurations will result in forward conduction and potential failure during negative transients.
What is the thermal derating behavior of SA14H above 25°C ambient?
SA14H's peak pulse power (500 W) is specified at TA = 25°C and must be derated linearly above that temperature per Figure 2 in the datasheet. At 75°C ambient, its steady-state power dissipation is rated at 3 W when mounted on 10 × 10 mm copper pads-critical for thermal design in enclosed automotive enclosures where board-level cooling is limited.
SA14H 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:
- -
- 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)
SA14H FAQ
1.How can I place an order for SA14H through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14H 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 SA14H reliable?
The price and inventory of SA14H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14H is usually 5 days.
3.What payment methods are accepted for SA14H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14H?
SA14H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14H 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 SA14H?
For technical support, including SA14H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14H requirements.
6.How does Aetrix verify that SA14H is sourced from the original manufacturer or authorized distributors?
All SA14H 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 SA14H meets industry standards.
7.What is the process for return or replacement of SA14H?
All SA14H units undergo pre-shipment inspection (PSI). If there is an issue with SA14H, 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 SA14H part is unused and in its original packaging.
Return procedure for SA14H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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