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Taiwan Semiconductor Corporation SA7.5C
- Part No.:
- SA7.5C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA7.5C.pdf
- Description:
- 500W, 9.3V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,799
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Product details
Overview
SA7.5C from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 7.5V working stand-off voltage, 8.33–10.20V breakdown voltage at 1mA test current, and 14.3V maximum clamping voltage at 36A peak pulse current. It protects automotive and industrial power rails against ESD and lightning-induced transients.
For engineers reviewing the SA7.5C datasheet, SA7.5C pinout, SA7.5C application, or SA7.5C equivalent, this page delivers verified electrical parameters, polarity-aware packaging details, clamping performance under 10/1000μs surge, junction temperature limits up to +175°C, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The SA7.5C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (8.33–10.20V). Its low dynamic impedance enables rapid clamping to ≤14.3V at 36A, limiting energy dissipation during 10/1000μs transients. It exhibits <1μA reverse leakage at 7.5V and a 7mV/°C VBR temperature coefficient.
Designed for primary-side overvoltage protection in DC power supplies and automotive ECUs, it complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (load dump) immunity requirements. The DO-204AC package supports lead-free soldering per J-STD-002 and meets UL 94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1mA | 8.33–10.20 V - Breakdown threshold range defining turn-on consistency across production lot |
| VC @ IPPM=36A | 14.3 V - Clamped voltage during 10/1000μs surge; determines protected circuit's max stress level |
| PPK | 500 W - Peak pulse power handling capability per single non-repetitive 10/1000μs waveform |
| IR @ VWM | <1 μA - Reverse leakage ensuring minimal standby power loss in battery-powered systems |
| TJ MAX | +175 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with cathode band marking |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode marked by band; Anode and Cathode terminals defined per polarity 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 | Forward current entry / Reverse voltage reference node | Connected to system ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal / Surge current sink | Connected to protected line (e.g., 5V rail); conducts surge current to ground when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 500W peak pulse power rating | Supports IEC 61000-4-5 Level 3 (1kV/2Ω) surge immunity without derating at TA = 25°C |
| Clamping voltage ≤14.3V at 36A | Ensures downstream 5V logic ICs (e.g., microcontrollers, CAN transceivers) remain below absolute maximum ratings during transients |
| Fast response time <1.0ps | Activates before ESD events (IEC 61000-4-2 ±8kV contact) can damage sensitive gate oxides |
| AEC-Q101 qualified option available | Validated for automotive applications including engine control units and body electronics per stress test requirements |
| RoHS & halogen-free compliance | Meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21 for green manufacturing and end-of-life processing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed ECU power input subjected to ISO 7637-2 load dump pulses up to 60V/100ms. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between input rail and ground to shunt surge energy. Use Value: Limits rail voltage to ≤14.3V during 36A transients, preventing damage to 16V-rated LDOs and MCU power pins. | Use Scenario: 5V analog sensor supply line exposed to EFT bursts (IEC 61000-4-4, 4kV) in factory automation PLC modules. IC Role / Device Role / Timing Role: Standoff protector on sensor VDD line, activated only during fast-rising transients. Use Value: Sub-μA leakage preserves low-power sleep mode current budget; 14.3V clamping avoids ADC reference disruption. |
| LED Driver Overvoltage Clamp | USB Port ESD Suppression |
Use Scenario: Constant-current LED driver output facing inductive kickback from relay coil switching in automotive lighting. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing reverse-energy spikes generated by inductive loads. Use Value: 500W rating handles repetitive 10/1000μs surges without thermal runaway; DO-15 package fits high-density PCB layouts. | Use Scenario: VBUS line of USB 2.0 port in infotainment head unit exposed to ±15kV air discharge per IEC 61000-4-2. IC Role / Device Role / Timing Role: Primary-level ESD suppressor placed upstream of USB switch or PHY. Use Value: <1ps response ensures clamping occurs before ESD pulse couples into data lines; 7.5V VWM avoids interference with 5V signaling. |
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 SMAJ7.5A | Same DO-214AC package; 7.5V VWM, 8.33–9.21V VBR, 14.3V VC @ 36A - identical clamping but higher IR (5μA) | Not AEC-Q101 qualified; suitable for commercial/industrial use only | Select when cost sensitivity outweighs automotive qualification requirement |
| Vishay 1.5SMC7.5 | DO-214AB package; 7.5V VWM, 8.3–9.2V VBR, 14.3V VC @ 36A - same electrical specs, larger footprint (7.11 × 6.22 mm vs. DO-15's 4.2 × 2.2 mm) | Higher thermal mass allows marginally better 1Hz repetitive surge handling | Select when board space permits larger SMC package and higher surge repetition rate is needed |
Compared with SMAJ7.5A and 1.5SMC7.5, the SA7.5C offers AEC-Q101 qualification in the compact DO-15 form factor, making it optimal for space-constrained automotive modules where qualification and size are both critical selection criteria.
Availability
SA7.5C is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, LED driver overvoltage clamping, and USB VBUS ESD suppression requiring stable component supply and long-term lifecycle support.
Supply support for SA7.5C 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 TVS diodes are engineered for robust transient immunity in harsh environments, with emphasis on AEC-Q101 qualification, tight VBR tolerances, and reliable clamping performance across -55°C to +175°C junction temperature range.
FAQ
What is the polarity configuration of the SA7.5C?
The SA7.5C is a unidirectional TVS diode with clearly marked cathode band on the DO-204AC (DO-15) package. It conducts only in reverse bias above its breakdown voltage and must be installed with cathode toward the protected line and anode to ground. This configuration ensures precise clamping of positive transients on DC rails while blocking normal forward-biased operation.
Does the SA7.5C meet AEC-Q101 qualification?
The base SA7.5C part is not AEC-Q101 qualified; however, the SA7.5CH variant (with 'H' suffix) is fully AEC-Q101 qualified per Rev. L2105 documentation. For automotive applications requiring qualification, SA7.5CH must be specified - it shares identical electrical parameters and DO-15 packaging but undergoes extended stress testing including HTGB, HTRB, and temperature cycling.
What is the maximum peak pulse current the SA7.5C can handle?
The SA7.5C is rated for a maximum peak pulse current (IPPM) of 36.0 A under the standard 10/1000μs double-exponential waveform. This value is derived from its 500W peak pulse power rating and 14.3V clamping voltage (PPK = VC × IPPM). Derating applies above 25°C ambient per Fig.2 in the datasheet.
How does the SA7.5C compare to bidirectional TVS diodes like SA7.5CA?
The SA7.5C is unidirectional and optimized for DC rail protection with asymmetric conduction; SA7.5CA is bidirectional and suited for AC signal lines or differential buses. SA7.5C has lower leakage (<1μA at 7.5V) and faster response (<1.0ps), whereas SA7.5CA exhibits symmetrical clamping in both directions but higher leakage and 5ns response. Choose SA7.5C for 5V/12V power rails; SA7.5CA for RS-485 or CAN bus protection.
What is the thermal resistance junction-to-lead (RθJL) for the SA7.5C?
The SA7.5C datasheet does not specify RθJL directly, but its steady-state power dissipation (PD) is rated at 3W at TL = 75°C with 9.5mm lead length copper pads. Using PD = (TJMAX − TL) / RθJL, RθJL calculates to approximately 33.3°C/W - consistent with typical DO-15 packaged TVS diodes and sufficient for natural convection cooling in most automotive and industrial PCB layouts.
SA7.5C 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:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SA7.5C FAQ
1.How can I place an order for SA7.5C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA7.5C 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 SA7.5C reliable?
The price and inventory of SA7.5C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA7.5C is usually 5 days.
3.What payment methods are accepted for SA7.5C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA7.5C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA7.5C?
SA7.5C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA7.5C 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 SA7.5C?
For technical support, including SA7.5C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA7.5C requirements.
6.How does Aetrix verify that SA7.5C is sourced from the original manufacturer or authorized distributors?
All SA7.5C 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 SA7.5C meets industry standards.
7.What is the process for return or replacement of SA7.5C?
All SA7.5C units undergo pre-shipment inspection (PSI). If there is an issue with SA7.5C, 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 SA7.5C part is unused and in its original packaging.
Return procedure for SA7.5C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA7.5C Tags
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