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Taiwan Semiconductor Corporation SA14AH
- Part No.:
- SA14AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14AH.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,633
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Product details
Overview
SA14AH from Taiwan Semiconductor is an AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, 14V working stand-off voltage (VWM), and clamps to ≤25.8V at 20.3A peak pulse current. It delivers fast response (<1.0ps), low leakage (<1μA @ >10V), and operates from –55°C to +175°C - deployed in automotive power line and ECU input protection.
For engineers reviewing the SA14AH datasheet, SA14AH pinout, SA14AH application, or SA14AH equivalent, this page provides verified electrical parameters, clamping behavior under surge stress, thermal derating curves, AEC-Q101 qualification status, and direct alternatives with documented VWM/VBR/IPP matching - all specific to the SA14AH variant.
Technical Context
The SA14AH is a unidirectional silicon avalanche diode designed for parallel-connected overvoltage protection. Its breakdown voltage (VBR) is specified at 15.6–19.1V with 1mA test current, and it clamps transients to ≤25.8V at 20.3A (10/1000μs waveform), exhibiting <1.0ps response time from 0V to VBR. The device uses standard PN-junction avalanche structure without integrated control logic or active circuitry.
It operates within a junction temperature range of –55°C to +175°C and is rated for 70A non-repetitive forward surge (8.3ms half-sine). Steady-state power dissipation is 3W at TL = 75°C on 10×10 mm copper pads, and its temperature coefficient of VBR is +14 mV/°C - enabling predictable voltage shift across automotive thermal profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before conduction begins; sets minimum system bus margin for 12V automotive circuits. |
| VBR min/max | 15.6 / 19.1 V @ 1 mA - guaranteed avalanche initiation window; ensures reliable turn-on above nominal 12V rail during load dump. |
| VC @ IPPM | ≤25.8 V @ 20.3 A - clamping voltage under 10/1000μs surge; limits downstream IC stress to safe levels during ISO 7637-2 Pulse 5a. |
| PPK | 500 W - peak pulse power rating per 10/1000μs waveform; supports single-event automotive transients up to 20.3A. |
| IR @ VWM | <1 μA - reverse leakage at 14V; negligible standby current draw in always-on vehicle modules. |
| TJ max | +175 °C - maximum junction temperature; enables placement near high-power components in engine bay or power distribution units. |
| 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
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Weight ≈0.400 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping event. |
| Cathode | Protected line connection / High-side terminal | Connected to protected node (e.g., 12V supply rail); blocks normal operation up to 14V, avalanches above VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for under-hood ECUs and body controllers. |
| 500W 10/1000μs surge rating | Withstands ISO 7637-2 Pulse 5a (load dump) without degradation when properly heatsinked - eliminates need for external series impedance in many cases. |
| <1.0ps response time | Activates before most microcontroller I/O pins can be damaged by ESD or fast transients - critical for protecting CAN/LIN transceivers and sensor interfaces. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive - meets Tier 1 automotive supplier material declarations and end-of-life recycling requirements. |
| Low IR & stable VBR tempco | Leakage <1μA @ 14V minimizes battery drain; +14 mV/°C VBR drift enables accurate thermal margining across –40°C to +125°C ambient. |
Applications
| Automotive Power Line Protection | CAN Transceiver ESD Protection |
|---|---|
Use Scenario: 12V battery rail in engine control unit subjected to ISO 7637-2 Pulse 5a (load dump) up to 60V for 400ms. IC Role / Device Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps transient to ≤25.8V, preventing overvoltage damage to buck controller ICs while maintaining <1μA leakage during quiescent operation. |
Use Scenario: CAN_H/CAN_L lines exposed to IEC 61000-4-2 ESD events (±8kV contact) in vehicle infotainment gateway. IC Role / Device Role: Bidirectional TVS (SA14AH not used here; see SA14A for bidirectional) - *SA14AH is unidirectional; this card applies to SA14A only.* Use Value: Not applicable - SA14AH is unidirectional and unsuitable for differential bus protection. Use SA14A instead. |
| Industrial Sensor Interface Protection | LED Driver Input Surge Suppression |
Use Scenario: 24V industrial PLC analog input module exposed to inductive switching transients from solenoid drivers. IC Role / Device Role: Unidirectional TVS on 24V supply rail upstream of LDO regulator feeding ADC front-end. Use Value: Limits clamped voltage to ≤25.8V, ensuring LDO remains within absolute maximum ratings and prevents ADC reference corruption. |
Use Scenario: Constant-current LED driver input in streetlight fixture subjected to lightning-induced surges on AC mains feed. IC Role / Device Role: Primary-stage unidirectional TVS on rectified DC bus prior to PFC controller. Use Value: Absorbs 500W surge energy without failure, preserving driver IC integrity and avoiding field returns due to surge-induced latch-up. |
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 SMAJ14A | VWM = 14V, VBR = 15.6–17.2V, VC = 23.2V @ 22.6A, same DO-214AC package (not DO-15); higher IPPM but different footprint. | Requires PCB layout change - SMA package has surface-mount terminals vs. SA14AH's axial leads. | Select SMAJ14A only if transitioning to SMT assembly; retain SA14AH for through-hole or legacy DO-15 designs. |
| Vishay 1.5KE14A | VWM = 12V, VBR = 15.6–17.2V, VC = 23.2V @ 64.5A, 1500W rating, DO-201AD package; higher power but larger case and higher leakage (5μA). | Over-spec'd for 500W needs; may require larger board area and heatsinking; higher IR increases standby loss. | Choose 1.5KE14A only when multi-pulse or repeated surge exposure demands higher energy handling beyond SA14AH's 500W limit. |
Compared with SMAJ14A and 1.5KE14A, SA14AH offers exact DO-204AC (DO-15) compatibility, AEC-Q101 qualification, and optimized 500W/14V balance for cost-sensitive automotive and industrial through-hole designs - without requiring layout revision or over-engineering.
Availability
SA14AH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver input surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SA14AH 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 - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 validation capability.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 compliance, tight VBR tolerances, and robust 10/1000μs surge performance in standard axial packages - targeting cost-effective, drop-in replaceability for legacy DO-15 designs.
FAQ
What is the AEC-Q101 qualification status of SA14AH?
The SA14AH is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H", confirmed in TSC's SA Series datasheet Version L2105. This includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and surge endurance - making SA14AH suitable for automotive powertrain and chassis applications where reliability is mandated.
Does SA14AH support bidirectional transient suppression?
No, SA14AH is a unidirectional TVS diode, indicated by its single cathode band marking and specification of VBR only for forward-biased avalanche. For bidirectional protection (e.g., data lines), the SA14A variant must be used - it has symmetrical VBR in both directions and no polarity marking. Using SA14AH on AC or differential signals risks permanent failure.
What is the maximum clamping voltage of SA14AH under surge conditions?
The maximum clamping voltage (VC) of SA14AH is 25.8 V at 20.3 A peak pulse current (IPPM), tested with the standard 10/1000μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events - critical for validating downstream IC voltage tolerances.
Can SA14AH be used in place of SA14 or SA14A?
No - SA14AH is not interchangeable with SA14 (non-AEC-Q101, same electrical specs) or SA14A (bidirectional, same VWM but dual-polarity clamping). SA14AH adds AEC-Q101 qualification and shares SA14's unidirectional behavior, but substituting it for SA14A would leave bidirectional paths unprotected. Always match suffix: "H" = AEC-Q101 unidirectional; "A" = bidirectional.
What is the thermal derating behavior of SA14AH above 25°C ambient?
SA14AH's peak pulse power (PPK) derates linearly above TA = 25°C per Figure 2 in the datasheet: at 75°C ambient, PPK drops to ~70% of 500W (~350W); at 125°C, it falls to ~40% (~200W). This must be accounted for in under-hood applications - sustained high-temperature operation requires verifying that worst-case surge energy remains within the derated PPK envelope.
SA14AH 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:
- -
- 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)
SA14AH FAQ
1.How can I place an order for SA14AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14AH 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 SA14AH reliable?
The price and inventory of SA14AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14AH is usually 5 days.
3.What payment methods are accepted for SA14AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14AH?
SA14AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14AH 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 SA14AH?
For technical support, including SA14AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14AH requirements.
6.How does Aetrix verify that SA14AH is sourced from the original manufacturer or authorized distributors?
All SA14AH 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 SA14AH meets industry standards.
7.What is the process for return or replacement of SA14AH?
All SA14AH units undergo pre-shipment inspection (PSI). If there is an issue with SA14AH, 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 SA14AH part is unused and in its original packaging.
Return procedure for SA14AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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