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Taiwan Semiconductor Corporation SA15CA
- Part No.:
- SA15CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA15CA.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,651
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Product details
Overview
SA15CA from Taiwan Semiconductor is a bidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 15V working stand-off voltage (VWM), 16.7–20.4V breakdown voltage (VBR), and 26.9V maximum clamping voltage (VC) at 19.5A peak pulse current. It delivers fast response (<5.0ns), low leakage (<1μA @ VWM), and AEC-Q101 qualification for automotive-grade surge protection.
For engineers reviewing the SA15CA datasheet, SA15CA pinout, SA15CA application, or SA15CA equivalent, this device is selected for ESD and electrical fast transient (EFT) immunity in automotive lighting modules, power supply input stages, CAN/LIN bus interfaces, and industrial sensor signal lines where bidirectional clamping and high surge robustness are required.
Technical Context
The SA15CA operates as a bidirectional avalanche diode, leveraging silicon p-n junctions to clamp both positive and negative transients symmetrically. Its breakdown voltage range (16.7–20.4V) ensures reliable conduction above 15V stand-off while maintaining low leakage below that threshold.
It sustains 500W peak pulse power per 10/1000μs waveform, with thermal derating above 25°C per Fig.2 and junction temperature limits up to +175°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for harsh-environment deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin for 12V automotive systems. |
| VBR min/max | 16.7 / 20.4 V - Breakdown occurs within this range at 1mA test current; ensures predictable turn-on across process variation. |
| VC @ IPPM | 26.9 V - Clamping voltage at 19.5A peak pulse; limits downstream IC stress during ISO 7637-2 pulse 1/2/5a surges. |
| PPK | 500 W - Peak pulse power handling per 10/1000μs waveform; supports IEC 61000-4-5 Level 4 (4kV) compliance. |
| IR @ VWM | <1 μA - Reverse leakage at 15V; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| Response time | <5.0 ns - Time from 0V to VBR under bidirectional transient; enables protection of sub-10ns edge-rate digital signals. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood placement in automotive ECUs without thermal derating penalties. |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, epoxy-molded case with cathode band marking for unidirectional variants; SA15CA is bidirectional and marked without polarity band per datasheet note "Polarity: As marked" - leads are non-polarized terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (non-polarized) | Bidirectional avalanche junction | Either lead serves as input/output terminal; symmetrical clamping behavior for ± transients without orientation dependency. |
| Lead 1 | Terminal connection | Tin-plated copper lead compliant with J-STD-002 solderability; supports wave/reflow processes with 0.400g unit weight. |
| Lead 2 | Terminal connection | Identical to Lead 1; no functional distinction - mechanical symmetry enables automated placement without orientation sensing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per Rev L2105 spec. |
| 500W 10/1000μs surge rating | Withstands repetitive load dump and alternator ripple events in 12V vehicle electrical systems without degradation. |
| <5.0ns bidirectional response | Clamps ESD events (IEC 61000-4-2) and EFT bursts (IEC 61000-4-4) before sensitive analog/digital inputs are overdriven. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for green manufacturing and export markets. |
| DO-204AC (DO-15) package | Industry-standard axial footprint compatible with legacy PCB tooling, wave soldering, and manual repair workflows. |
Applications
| Automotive Lighting Control | CAN Bus Transceiver Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers in headlamp/tail lamp modules from load dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail (VBAT/GND) and signal lines (PWM dimming, LIN communication). Use Value: Clamps 12V system transients to ≤26.9V, preventing latch-up or gate oxide damage in 3.3V/5V logic and MOSFET drivers. |
Use Scenario: Safeguarding CANH/CANL pins of transceivers against ESD and coupled noise in body control modules. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamping device installed differential-mode between CANH–CANL and common-mode to chassis ground. Use Value: Maintains CAN signal integrity with <5ns response and <1μA leakage, avoiding bit error rate degradation during 8kV contact ESD events. |
| Industrial Sensor Signal Conditioning | Power Supply Input Stage |
Use Scenario: Shielding 4–20mA transmitter front-ends and ADC inputs from EFT and lightning-induced surges on field wiring. IC Role / Device Role / Timing Role: Primary transient shunt on analog input path, placed before precision op-amps and reference buffers. Use Value: Limits transient overshoot to 26.9V while contributing negligible offset error due to sub-μA leakage at 15V stand-off. |
Use Scenario: Front-end surge suppression for DC-DC converters and LDO regulators in 12V/24V industrial power supplies. IC Role / Device Role / Timing Role: First-line defense against ISO 7637-2 pulses applied to input capacitors and switching FET gates. Use Value: Absorbs 500W surge energy without failure, enabling single-stage protection architecture and reducing BOM count vs. multi-stage designs. |
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 (Bourns) | Same DO-214AA (SMB) package, 15V VWM, 24.4V VC @ 23.1A; 600W rating; higher clamping voltage but lower leakage (0.5μA). | Requires PCB footprint change (SMB vs DO-15); better suited for space-constrained SMT layouts. | Select SMBJ15CA when board real estate is limited and SMT assembly is preferred; verify thermal pad layout for 600W dissipation. |
| P6KE15CA (ON Semiconductor) | DO-204AC (DO-15) package, same pinout; 15V VWM, 24.4V VC @ 23.1A; 600W rating; slightly faster response (~3.5ns) but not AEC-Q101 qualified. | Drop-in mechanical replacement; lacks automotive qualification and halogen-free certification per IEC 61249-2-21. | Choose P6KE15CA for cost-sensitive industrial applications where AEC-Q101 and RoHS/halogen-free compliance are not mandatory. |
Compared with SMBJ15CA and P6KE15CA, the SA15CA offers AEC-Q101 qualification and halogen-free construction in the legacy DO-15 through-hole package - making it optimal for automotive service parts, repair kits, and industrial designs requiring long-term component availability and regulatory traceability.
Availability
SA15CA is available at Aetrix Electronics and suitable for automotive lighting control, CAN bus interface protection, and industrial sensor signal conditioning requiring stable component supply across extended product lifecycles.
Supply support for SA15CA 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 since 1979.
The SA Series was designed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, robust surge handling, and long-term parametric stability under thermal stress.
FAQ
What does the "CA" suffix indicate in SA15CA?
The "CA" suffix in SA15CA denotes a bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients across its two terminals. Unlike unidirectional SA15A (which has a cathode band), SA15CA has no polarity marking and functions identically regardless of voltage polarity. This makes SA15CA ideal for protecting differential signal lines like CAN bus or AC-coupled sensors where polarity reversal is possible.
Is SA15CA suitable for 24V automotive systems?
SA15CA is rated for 15V working stand-off voltage (VWM), making it appropriate for 12V nominal automotive systems but not directly for 24V systems. In a 24V environment, the device would conduct continuously due to exceeding VWM, leading to thermal runaway. For 24V applications, SA33CA (33V VWM) or SA36CA (36V VWM) are recommended alternatives with matching DO-204AC packaging and AEC-Q101 qualification.
Does SA15CA meet IEC 61000-4-2 and IEC 61000-4-4 standards?
SA15CA is not certified to IEC 61000-4-2 or IEC 61000-4-4 as a standalone system-level test result, but its electrical characteristics - including <5.0ns response time, 26.9V clamping at 19.5A, and <1μA leakage - enable circuit-level compliance when properly implemented in conjunction with PCB layout best practices (e.g., short traces, low-inductance grounding). System validation remains the designer's responsibility per TSC's notice on application liability.
What is the maximum peak pulse current (IPPM) rating for SA15CA?
The maximum peak pulse current (IPPM) for SA15CA is 19.5A under the standard 10/1000μs double-exponential surge waveform. This value is derived from its 500W peak pulse power rating and 26.9V clamping voltage (IPPM = PPK / VC = 500W / 26.9V ≈ 18.6A), with datasheet listing 19.5A to account for measurement tolerance and junction temperature effects at TA = 25°C.
Can SA15CA be used in place of SA15A?
No - SA15CA and SA15A are functionally distinct: SA15A is unidirectional (cathode-banded, clamps only negative transients relative to anode), while SA15CA is bidirectional (no polarity marking, clamps both polarities). Substituting SA15CA for SA15A in a unidirectional circuit may cause unintended conduction during normal forward bias operation. Always match the suffix: "A" for unidirectional, "CA" for bidirectional.
SA15CA 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA15CA FAQ
1.How can I place an order for SA15CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA15CA 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 SA15CA reliable?
The price and inventory of SA15CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA15CA is usually 5 days.
3.What payment methods are accepted for SA15CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA15CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA15CA?
SA15CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA15CA 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 SA15CA?
For technical support, including SA15CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA15CA requirements.
6.How does Aetrix verify that SA15CA is sourced from the original manufacturer or authorized distributors?
All SA15CA 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 SA15CA meets industry standards.
7.What is the process for return or replacement of SA15CA?
All SA15CA units undergo pre-shipment inspection (PSI). If there is an issue with SA15CA, 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 SA15CA part is unused and in its original packaging.
Return procedure for SA15CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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