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Taiwan Semiconductor Corporation SA15CAH
- Part No.:
- SA15CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA15CAH.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,390
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Product details
Overview
SA15CAH from Taiwan Semiconductor is a bidirectional 15V transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 26.9V max clamping voltage at 19.5A peak pulse current and <1μA reverse leakage at 15V, used for ESD and electrical fast transient protection in automotive lighting and power supply inputs.
For engineers reviewing the SA15CAH datasheet, SA15CAH pinout, SA15CAH application, or SA15CAH equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under standardized surge waveforms, and real-world system-level protection use cases aligned with IEC 61000-4-2/4-4 compliance requirements.
Technical Context
The SA15CAH is a bidirectional avalanche diode designed to clamp transient overvoltages in both polarities without requiring external polarity management. Its breakdown voltage range is 16.7–20.4V at 1mA test current, with a working stand-off voltage of 15V and maximum clamping voltage of 26.9V at 19.5A IPPM.
It operates across –55°C to +175°C junction temperature, supports 70A non-repetitive forward surge current (8.3ms half-sine), and exhibits low dynamic impedance to ensure rapid response (<5ns) during fast transients such as EFT and ESD events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR min/max | 16.7 / 20.4 V @ 1 mA - Confirmed avalanche onset range defining turn-on threshold consistency |
| VC @ IPPM | 26.9 V @ 19.5 A - Clamped voltage during 10/1000μs surge, directly limiting downstream IC stress |
| PPK | 500 W - Peak pulse power handling per single 10/1000μs waveform, per JEDEC standards |
| IR @ VWM | <1 μA - Reverse leakage ensuring minimal standby power loss and signal integrity in high-impedance nodes |
| TJ max | +175 °C - Enables operation in under-hood automotive environments without thermal derating penalties |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
DO-204AC (DO-15) axial-leaded package with cathode band marking; 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 | Current entry point in forward bias; common reference for bidirectional clamping | Connected to protected line (e.g., CAN_H or power rail); forms symmetrical conduction path with cathode |
| Cathode | Current exit point in forward bias; marked by band on body | Provides polarity identification; enables correct orientation during PCB placement for unidirectional variants (not applicable here - SA15CAH is bidirectional) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or floating lines (e.g., RS-485, CAN, sensor bridges) without polarity constraints |
| 500W surge rating | Withstands IEC 61000-4-5 Level 3 (1kV/2Ω) surges without degradation when properly mounted |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics applications requiring zero-defect reliability |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to downstream ICs compared to higher-ratio TVS devices |
| Halogen-free & RoHS compliant | Meets automotive OEM material declarations (IEC 61249-2-21) and end-of-life recycling requirements |
Applications
| Automotive LED Headlamp Driver Protection | Industrial CAN Bus Transceiver Interface |
|---|---|
Use Scenario: Protects LED driver ICs from load dump and jump-start transients in 12V vehicle systems. IC Role / Device Role: Primary overvoltage clamp placed across input rails upstream of DC-DC converter. Use Value: Limits transient voltage to ≤26.9V, preventing damage to 30V-rated buck controllers and maintaining functional safety integrity. | Use Scenario: Shields isolated CAN transceivers from ESD and EFT coupling on differential bus lines. IC Role / Device Role: Bidirectional shunt element connected between CAN_H and CAN_L, referenced to ground via low-inductance layout. Use Value: Clamps ±26.9V surges within nanoseconds, preserving signal integrity and meeting ISO 11898-2 EMC immunity targets. |
| Smart Building PoE-Powered Sensor Node | White Goods Motor Control Board Input Stage |
Use Scenario: Guards Ethernet PHY and microcontroller I/O against induced surges from nearby AC wiring in PoE-powered occupancy sensors. IC Role / Device Role: Secondary-level protection after primary gas discharge tube, placed at RJ45 connector interface. Use Value: Provides precise 15V standoff and sub-μA leakage to avoid interfering with IEEE 802.3af detection signaling. | Use Scenario: Suppresses inductive kickback from relay coils and BLDC motor drivers on 24V control logic rails. IC Role / Device Role: Low-capacitance shunt clamp across microcontroller supply pins and gate driver outputs. Use Value: Delivers 500W pulse absorption without adding signal distortion, enabling reliable operation in noisy factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | DO-214AA package; 600W rating; slightly lower VC (24.4V @ 24.7A); same VWM/VBR range | Higher power density but requires SMT footprint; less suitable for through-hole legacy designs | Select SMBJ15CA only if board space allows SMT and higher surge margin is required |
| P6SMB15CA | DO-214AA package; 600W rating; identical VWM/VBR/VC specs; RoHS-compliant but not AEC-Q101 qualified | Lacks automotive qualification; appropriate for industrial/commercial use only | Choose P6SMB15CA where AEC-Q101 is not mandated and cost sensitivity favors ON Semiconductor sourcing |
Compared with SMBJ15CA and P6SMB15CA, SA15CAH provides AEC-Q101 validation in a through-hole DO-15 package-critical for serviceable automotive modules and legacy industrial controls where leaded mounting and qualification traceability are mandatory.
Availability
SA15CAH is available at Aetrix Electronics and suitable for automotive lighting systems, industrial CAN networks, PoE-powered IoT sensors, and motor control boards requiring stable component supply with full AEC-Q101 documentation and lot-level traceability.
Supply support for SA15CAH 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 Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs since 1979.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 compliance, tight VBR tolerances, and robust surge endurance in axial-leaded packages.
FAQ
What does the "H" suffix in SA15CAH indicate?
The "H" suffix in SA15CAH denotes AEC-Q101 qualification-confirmed by Taiwan Semiconductor's official documentation. This means SA15CAH has passed stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness required for automotive electronics. The "H" is not a package or voltage variant code; it exclusively signifies automotive-grade reliability validation for SA15CAH.
Is SA15CAH unidirectional or bidirectional?
SA15CAH is a bidirectional TVS diode, as confirmed by its "CA" designation (C = bidirectional, A = AEC-Q101 qualified) and electrical specifications showing symmetric VBR and VC values in both directions. Unlike unidirectional SA15A, SA15CAH clamps transients equally on positive and negative excursions-making it suitable for AC lines, differential buses, and floating grounds where polarity is undefined.
What is the maximum clamping voltage of SA15CAH under standard test conditions?
The maximum clamping voltage of SA15CAH is 26.9 V at 19.5 A peak pulse current (IPPM), measured under the 10/1000μs double-exponential surge waveform per IEC 61000-4-5. This value is specified in Taiwan Semiconductor's SA Series datasheet (Version L2105, Table on Page 4) and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can SA15CAH replace SA15A in an existing design?
No-SA15CAH cannot directly replace SA15A without layout review. While both share 15V VWM and similar VBR ranges, SA15A is unidirectional and requires correct anode/cathode orientation, whereas SA15CAH is bidirectional and lacks polarity marking for directional use. Substituting SA15CAH for SA15A may compromise protection in DC-biased circuits where asymmetry matters, and vice versa.
What packaging options are available for SA15CAH?
SA15CAH is supplied in DO-204AC (DO-15) axial-leaded package, available in 3,500-piece tape-and-reel (ordering code SA15CAH) and 1,500-piece ammo box (ordering code SA15CAHA0G). Both options feature pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance-ensuring long-term reliability in automated assembly and harsh-environment deployments.
SA15CAH 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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 21A
- 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)
SA15CAH FAQ
1.How can I place an order for SA15CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15CAH 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 SA15CAH reliable?
The price and inventory of SA15CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15CAH is usually 5 days.
3.What payment methods are accepted for SA15CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15CAH?
SA15CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15CAH 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 SA15CAH?
For technical support, including SA15CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15CAH requirements.
6.How does Aetrix verify that SA15CAH is sourced from the original manufacturer or authorized distributors?
All SA15CAH 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 SA15CAH meets industry standards.
7.What is the process for return or replacement of SA15CAH?
All SA15CAH units undergo pre-shipment inspection (PSI). If there is an issue with SA15CAH, 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 SA15CAH part is unused and in its original packaging.
Return procedure for SA15CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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