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Taiwan Semiconductor Corporation SA7.5CA
- Part No.:
- SA7.5CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.5CA.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,661
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Product details
Overview
SA7.5CA from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode with 7.5V working stand-off voltage, 8.33–10.20V breakdown voltage at 1mA test current, and 14.3V maximum clamping voltage at 50A peak pulse current. It protects automotive and industrial power rails against ESD, EFT, and inductive switching transients.
For engineers reviewing the SA7.5CA datasheet, SA7.5CA pinout, SA7.5CA application, or SA7.5CA equivalent, this device delivers fast sub-nanosecond response (<1.0ps), low leakage (<1μA @ 7.5V), AEC-Q101 qualification, DO-15 package compatibility, and robust 175°C junction temperature operation - critical for under-hood and high-reliability DC power protection.
Technical Context
The SA7.5CA operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (8.33–10.20V). Its clamping action limits transient energy to ≤14.3V at 50A (10/1000μs waveform), enabling reliable protection of 5V–12V logic and power ICs without overstressing downstream components.
Designed for single-polarity DC systems, it features pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and meets JESD201 Class 2 whisker resistance. Thermal derating begins above 25°C per Fig.2, with 3W steady-state dissipation on 10×10 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping initiates; matches 5V–12V rail protection requirements. |
| VBR @ IT=1mA | 8.33–10.20 V - Verified avalanche onset range; ensures consistent triggering across production lots and temperature. |
| VC @ IPPM=50A | 14.3 V - Clamped voltage during 10/1000μs surge; keeps protected ICs below absolute maximum ratings. |
| PPK | 500 W - Peak pulse power handling per 10/1000μs waveform; supports IEC 61000-4-5 Level 4 immunity testing. |
| IR @ VWM | <1 μA - Ultra-low reverse leakage at rated stand-off; prevents battery drain in always-on automotive modules. |
| TJ MAX | 175 °C - Maximum junction temperature; enables deployment in engine control units and under-hood ECUs. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with 0.400g mass; compatible with legacy through-hole assembly. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Weight: 0.400g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / Ground reference | Connected to system ground or low-side return; conducts surge current to earth during clamping. |
| Cathode | Reverse-biased input / Protected line connection | Connected to protected signal/power line (e.g., 12V battery rail); blocks normal operation but avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including temperature cycling, humidity, and mechanical shock per AEC standard. |
| 500W surge rating (10/1000μs) | Withstands IEC 61000-4-5 Level 4 (4kV) surges without degradation; eliminates need for external series impedance in many designs. |
| <1.0ps response time | Clamps before most microcontroller I/O pins can be damaged by ESD; outperforms typical silicon diodes by >100× in speed. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for global automotive and industrial manufacturing. |
| UL 94V-0 flammability rating | Molding compound self-extinguishes within 10 seconds after flame removal; meets safety-critical enclosure requirements. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes before they reach MCU power supply pins. Use Value: Limits clamped voltage to 14.3V at 50A, preventing latch-up or permanent damage to 16V-rated LDOs and CAN transceivers. |
Use Scenario: 24V digital input channel on programmable logic controller subjected to inductive kickback from solenoid switching. IC Role / Device Role / Timing Role: Standoff protection element absorbing 500W surge energy without failure. Use Value: Enables direct interface with 24V field devices while maintaining <1μA leakage to preserve input threshold accuracy. |
| LED Driver Overvoltage Clamp | ESD-Sensitive Sensor Interface |
Use Scenario: Constant-current LED driver board powered from unregulated 12V supply in commercial lighting fixture. IC Role / Device Role / Timing Role: Primary overvoltage suppression device placed at DC input stage. Use Value: Clamps 10/1000μs surges to ≤14.3V, protecting buck controller ICs rated for 16V max VIN and preventing thermal runaway. |
Use Scenario: Automotive ambient light sensor connected to vehicle infotainment system via short PCB trace. IC Role / Device Role / Timing Role: First-line ESD protection at connector entry point (IEC 61000-4-2 ±15kV contact discharge). Use Value: Sub-nanosecond response ensures clamping occurs before ESD pulse couples into analog front-end amplifier inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A | DO-214AC (SMA) package; 7.5V VWM; 12.9V VC @ 50A; 400W PPK rating. | Surface-mount only; lower surge rating; better suited for space-constrained PCBs where reflow compatibility is required. | Select SMAJ7.5A when board real estate is limited and 400W surge margin suffices; not drop-in for through-hole layouts. |
| P6SMB7.5A | DO-214AA (SMB) package; 7.5V VWM; 12.9V VC @ 50A; 600W PPK rating; higher IFSM (100A). | Higher surge capacity and forward surge rating; same VWM/VC but larger footprint than DO-15. | Choose P6SMB7.5A for enhanced robustness in high-energy environments like industrial motor drives where 600W margin is needed. |
Compared with SMAJ7.5A and P6SMB7.5A, the SA7.5CA offers through-hole DO-15 mounting, AEC-Q101 qualification, and precise 500W/14.3V clamping performance - making it optimal for automotive and high-reliability through-hole designs where mechanical stability and qualification compliance are mandatory.
Availability
SA7.5CA is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input conditioning, LED driver overvoltage clamp, and ESD-sensitive sensor interface applications requiring stable component supply across long production lifecycles.
Supply support for SA7.5CA 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 for automotive, industrial, and consumer markets.
The SA Series was developed specifically for high-reliability transient suppression in harsh environments - emphasizing AEC-Q101 compliance, tight parameter tolerances, and robust surge endurance in axial-leaded packages.
FAQ
What is the breakdown voltage range of the SA7.5CA?
The SA7.5CA has a specified breakdown voltage (VBR) range of 8.33 V to 10.20 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures reliable and repeatable avalanche initiation across temperature and process variation, directly supporting its role as a precision clamping device in 12V automotive and industrial systems.
Is the SA7.5CA suitable for bidirectional transient protection?
No - the SA7.5CA is a unidirectional TVS diode, indicated by the "CA" suffix and cathode band marking. It conducts only in reverse bias during overvoltage events and blocks forward current. For bidirectional protection, select SA7.5C (which lacks the "A" suffix and is symmetrically rated), not the SA7.5CA.
Does the SA7.5CA meet AEC-Q101 reliability standards?
Yes - the SA7.5CA is explicitly AEC-Q101 qualified, as confirmed in the SA Series datasheet (Version L2105). This includes stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life - validating its suitability for automotive under-hood and chassis-mounted applications.
What is the maximum clamping voltage of the SA7.5CA at rated surge current?
The SA7.5CA exhibits a maximum clamping voltage (VC) of 14.3 V at 50 A peak pulse current (10/1000 μs waveform). This value is guaranteed across production lots and defines the upper voltage limit imposed on protected circuitry during standardized surge events, ensuring compatibility with 16V-tolerant ICs.
Can the SA7.5CA be used in surface-mount designs?
No - the SA7.5CA uses the DO-204AC (DO-15) axial-leaded package, which is designed exclusively for through-hole mounting. It cannot be placed or reflowed on SMT pads. For surface-mount equivalents, consider SMAJ7.5A (SMA) or P6SMB7.5A (SMB), both of which share the same VWM and clamping performance but differ in package and surge rating.
SA7.5CA 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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)
SA7.5CA FAQ
1.How can I place an order for SA7.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.5CA 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 SA7.5CA reliable?
The price and inventory of SA7.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.5CA is usually 5 days.
3.What payment methods are accepted for SA7.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.5CA?
SA7.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.5CA 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 SA7.5CA?
For technical support, including SA7.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.5CA requirements.
6.How does Aetrix verify that SA7.5CA is sourced from the original manufacturer or authorized distributors?
All SA7.5CA 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 SA7.5CA meets industry standards.
7.What is the process for return or replacement of SA7.5CA?
All SA7.5CA units undergo pre-shipment inspection (PSI). If there is an issue with SA7.5CA, 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 SA7.5CA part is unused and in its original packaging.
Return procedure for SA7.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7.5CA Tags
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