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Taiwan Semiconductor Corporation SA14CAH
- Part No.:
- SA14CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA14CAH.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,715
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Product details
Overview
SA14CAH from Taiwan Semiconductor is a bidirectional AEC-Q101-qualified 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), 15.6–19.1V breakdown voltage (VBR), and 25.8V maximum clamping voltage (VC) at 20.3A peak pulse current - deployed for ESD and EFT protection in automotive lighting and powertrain control modules.
For engineers reviewing the SA14CAH datasheet, SA14CAH pinout, SA14CAH application, or SA14CAH equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, DO-15 mechanical dimensions, and direct alternatives for automotive-grade surge protection design-in.
Technical Context
The SA14CAH operates as a bidirectional avalanche diode, symmetrically clamping transients above ±15.6V in both polarities with sub-nanosecond response (≤5.0ns). Its VBR tolerance (min/max) and temperature coefficient (14 mV/°C) are specified per ANSI/IEEE C62.35, ensuring predictable overvoltage protection across -55°C to +175°C junction range.
Designed for unclamped inductive load switching and fast electrical fast transients (EFT), it sustains 70A non-repetitive forward surge (IFSM) and maintains <1μA reverse leakage above 10V - critical for low-power sensor interfaces and always-on automotive subsystems where standby current integrity is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous DC or RMS voltage the device blocks without clamping; defines system operating margin before protection engages. |
| VBR (min/max) | 15.6 / 19.1 V - Breakdown occurs within this band at 1 mA test current; ensures reliable triggering across process and temperature variation. |
| VC @ IPPM | 25.8 V at 20.3 A - Clamping voltage during 10/1000μs surge; limits downstream IC stress to safe levels under worst-case transient energy. |
| PPK | 500 W - Peak pulse power handling per single 10/1000μs waveform; supports ISO 7637-2 Pulse 1/2/5a compliance testing. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near high-heat sources like power MOSFETs or motor drivers in engine compartments. |
| IR @ VWM | <1 μA - Reverse leakage at 14 V; preserves battery life in always-on vehicle networks (e.g., CAN wake-up circuits). |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, epoxy-molded case meeting UL 94V-0; cathode band marking denotes polarity for unidirectional variants - not applicable to SA14CAH, which is bidirectional and non-polarized.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; terminals interchangeable - simplifies PCB layout and eliminates orientation errors in high-volume automotive assembly. |
| Lead 1 / Lead 2 | Surge current path | Both leads conduct equally during positive/negative transients; must be routed with equal trace impedance to preserve symmetry and avoid imbalance-induced failure. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood use per stress test requirements including HTOL, TC, HAST, and UHAST - enables drop-in use in ASIL-B systems without requalification. |
| 5.0 ns response time (bidirectional) | Clamps ESD events (IEC 61000-4-2) and EFT bursts (IEC 61000-4-4) before sensitive logic or analog circuitry is damaged - critical for CAN FD and LIN transceivers. |
| DO-204AC (DO-15) package | Industry-standard axial footprint compatible with legacy wave-solder and automated insertion equipment; supports manual repair and field replacement without redesign. |
| Halogen-free & RoHS compliant | Meets automotive OEM material declarations (IMDS, ELV) and end-of-life recycling mandates - avoids supply chain restrictions in EU, China, and North America. |
Applications
| Automotive LED Headlamp Driver Protection | Engine Control Unit (ECU) Power Input Stage |
|---|---|
Use Scenario: Protects LED driver ICs from load-dump transients (ISO 7637-2 Pulse 5a) and inductive kickback during headlamp dimming. IC Role / Device Role: Primary clamping element placed directly at 12V input rail before DC/DC converter and gate drivers. Use Value: Limits rail voltage to ≤25.8V during 100V/100ms load dump, preventing overvoltage shutdown or latch-up of buck controller and MOSFETs. | Use Scenario: Shields microcontroller power supply and CAN transceiver pins from alternator ripple, cranking dips, and ignition coil coupling. IC Role / Device Role: Bidirectional TVS on main 12V input and isolated CAN_H/CAN_L lines. Use Value: Maintains signal integrity during 200V EFT bursts (IEC 61000-4-4 Level 4) without disrupting real-time engine timing or emissions control. |
| Body Control Module (BCM) Window Lift Circuit | Electric Power Steering (EPS) Motor Driver Interface |
Use Scenario: Guards window motor H-bridge driver ICs against back-EMF spikes generated during abrupt stop/start motion. IC Role / Device Role: Parallel-connected TVS across motor terminals and driver outputs. Use Value: Absorbs up to 500W of inductive energy without degradation, enabling >100,000-cycle reliability in Class 3 door modules. | Use Scenario: Protects EPS torque sensor signal lines and gate drive power rails from high-frequency noise coupled from 3-phase inverter switching. IC Role / Device Role: Low-capacitance TVS on analog sensor inputs and auxiliary 5V supply lines. Use Value: Delivers <0.5 pF junction capacitance (per Fig.4) at 0V bias - preserves bandwidth of 10-bit torque ADC sampling without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14CA | Same VWM (14V), lower PPK (400W), SMA package (surface-mount) | Requires PCB re-layout; unsuitable for through-hole wave soldering or high-vibration environments without adhesive anchoring | Select when board space is constrained and automated SMT assembly is available. |
| P6SMB14CA | Same VWM (14V), identical DO-204AC package, but rated for 600W PPK and higher IPPM (32.5A) | Higher clamping voltage (27.6V) increases downstream IC stress margin; requires thermal derating above 75°C ambient | Select when higher surge margin is needed for off-road or commercial vehicle applications with extended load-dump exposure. |
Compared with SMAJ14CA and P6SMB14CA, SA14CAH offers optimal balance of AEC-Q101 qualification, 500W surge rating, and proven DO-15 mechanical robustness - making it preferred for cost-sensitive, high-reliability automotive modules requiring through-hole assembly and long-term supply stability.
Availability
SA14CAH is available at Aetrix Electronics and suitable for automotive lighting systems, engine control units, body control modules, and electric power steering systems requiring stable component supply across multi-year production cycles.
Supply support for SA14CAH 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 since 1979.
The SA Series was developed specifically for automotive-grade transient suppression, emphasizing AEC-Q101 compliance, high-temperature operation, and robust surge handling in harsh under-hood environments.
FAQ
What does the "H" suffix in SA14CAH indicate?
The "H" suffix in SA14CAH confirms full AEC-Q101 qualification per Rev D, including stress testing for high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST). This certification is documented in Taiwan Semiconductor's official qualification report and enables use in safety-critical automotive subsystems without additional customer-level validation.
Is SA14CAH unidirectional or bidirectional, and how is polarity marked?
SA14CAH is a bidirectional TVS diode - it clamps transients of either polarity symmetrically, with no anode/cathode distinction. Unlike unidirectional SA14A variants, SA14CAH has no cathode band marking and may be installed in either orientation. Its bidirectional behavior is confirmed by identical VBR min/max (15.6–19.1 V) and VC specs in both directions per the SA Series datasheet Table on Page 4.
What is the maximum clamping voltage of SA14CAH under a 10/1000μs surge?
The maximum clamping voltage (VC) of SA14CAH is 25.8 V when subjected to its rated peak pulse current of 20.3 A under the standard 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and appears in the "Maximum clamping voltage VC@IPPM" column for SA14CAH in the Electrical Characteristics table on Page 4 of the SA Series datasheet.
Can SA14CAH replace SA14A in an existing design?
No - SA14CAH cannot directly replace SA14A because SA14A is unidirectional (cathode-banded) while SA14CAH is bidirectional (non-polarized). Substituting SA14CAH would eliminate polarity-dependent forward conduction behavior required in some DC-biased protection schemes. The clamping curves, leakage, and thermal response also differ due to internal junction structure - redesign validation is mandatory.
What packaging options are available for SA14CAH?
SA14CAH is supplied in tape-and-reel format: 3,500 units per reel (ordering code SA14CAH). Ammo box packaging (1,500 units) is not offered for the "H"-suffix AEC-Q101 grade - only standard SA14CA variants support ammo box. All SA14CAH reels comply with EIA-481-D standards and include moisture-sensitive level (MSL) 1 labeling per J-STD-020.
SA14CAH 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:
- 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)
SA14CAH FAQ
1.How can I place an order for SA14CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA14CAH 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 SA14CAH reliable?
The price and inventory of SA14CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA14CAH is usually 5 days.
3.What payment methods are accepted for SA14CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA14CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA14CAH?
SA14CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA14CAH 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 SA14CAH?
For technical support, including SA14CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA14CAH requirements.
6.How does Aetrix verify that SA14CAH is sourced from the original manufacturer or authorized distributors?
All SA14CAH 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 SA14CAH meets industry standards.
7.What is the process for return or replacement of SA14CAH?
All SA14CAH units undergo pre-shipment inspection (PSI). If there is an issue with SA14CAH, 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 SA14CAH part is unused and in its original packaging.
Return procedure for SA14CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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