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Taiwan Semiconductor Corporation SA8.0C
- Part No.:
- SA8.0C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA8.0C.pdf
- Description:
- 500W, 9.9V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,345
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Product details
Overview
SA8.0C from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode with 8.0V working stand-off voltage, 8.89–10.9V breakdown voltage at 1mA test current, and 15.0V maximum clamping voltage at 25A peak pulse current. It features fast response time (<1.0ps), low leakage (<1μA above 10V), and DO-204AC (DO-15) package for automotive-grade ESD and surge protection in power supply rails.
For engineers reviewing the SA8.0C datasheet, SA8.0C pinout, SA8.0C application, or SA8.0C equivalent, key selection criteria include clamping voltage under 25A surge, unidirectional polarity marking, AEC-Q101 qualification status, thermal derating above 25°C, and compatibility with 10×10 mm copper pad layout for 3W steady-state dissipation.
Technical Context
The SA8.0C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (8.89–10.9V). It clamps transients to ≤15.0V at 25A (10/1000μs waveform), with junction temperature rated from –55°C to +175°C and thermal resistance optimized for DO-204AC mounting on 10×10 mm copper pads.
Its low dynamic impedance ensures effective suppression of fast EFT bursts and inductive switching spikes. The device exhibits <1μA reverse leakage at 8.0V and a 7 mV/°C VBR temperature coefficient, supporting stable performance across automotive ambient conditions without external biasing or control circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1mA | 8.89–10.9 V - Breakdown threshold defining turn-on point for transient clamping |
| VC @ IPPM=25A | 15.0 V - Clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 500 W - Peak non-repetitive surge power handling capability per IEEE C62.35 |
| IR @ VWM | <1 μA - Negligible standby leakage, preserving low-power system integrity |
| TJ max | +175 °C - Enables 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: anode (unmarked end) and cathode (banded end). Designed for through-hole mounting with 9.5 mm lead length, pure tin plating compliant with J-STD-002, and UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 12V rail); conducts avalanche current to anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 500W peak pulse power rating | Supports IEC 61000-4-5 Level 4 (4kV) surge immunity without derating at TA = 25°C |
| <1.0ps response time | Clamps ESD events faster than silicon-based protection ICs, minimizing voltage overshoot |
| AEC-Q101 qualified option (SA8.0CH) | Validated for automotive powertrain and body electronics per stress test requirements |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU for green manufacturing |
| Low clamping ratio (VC/VBR ≈ 1.45) | Ensures tight voltage margin between breakdown and clamping, reducing risk of false triggering |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-supplied ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp transients before they reach LDOs and microcontrollers. Use Value: Limits peak rail voltage to ≤15.0V during 500W surges, preventing latch-up or gate oxide damage in downstream ASICs. | Use Scenario: 4–20mA current loop transmitters interfacing with PLC analog inputs. IC Role / Device Role / Timing Role: Standoff protection on signal lines against induced lightning surges and field wiring faults. Use Value: Withstands 25A 10/1000μs pulses while maintaining <1μA leakage, preserving loop accuracy and zero-point stability. |
| LED Driver Overvoltage Clamp | USB Port ESD Suppression |
Use Scenario: Constant-current LED drivers in automotive lighting subject to inductive kickback from relay coils. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to absorb energy from coil de-energization. Use Value: Clamps flyback spikes to 15.0V within <1.0ps, protecting MOSFET drain-source junctions rated for 20V max. | Use Scenario: USB 2.0 data lines in infotainment head units exposed to human-body-model ESD. IC Role / Device Role / Timing Role: Discrete unidirectional TVS on VBUS line only (not D+/D−), referenced to chassis ground. Use Value: Provides 500W surge headroom beyond IEC 61000-4-2 Level 4 (15kV contact), with no capacitance impact on signal integrity. |
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 SMAJ8.0A | Same DO-214AC package; 8.89–10.9V VBR, 15.0V VC@25A, but rated for 400W PPK | Lower surge rating limits use in high-energy load-dump scenarios | Select SMAJ8.0A only if system-level testing confirms 400W suffices and DO-214AC SMT layout is preferred |
| ON Semiconductor 1.5SMC8.0A | DO-214AB package; identical VWM/VBR/VC specs, 500W rating, but 1.5kW peak for 1ms (non-standard waveform) | Higher transient headroom at shorter durations, but larger footprint and higher thermal mass | Choose 1.5SMC8.0A when board space allows larger case and legacy DO-214AB tooling is in place |
Compared with SMAJ8.0A and 1.5SMC8.0A, the SA8.0C delivers matching clamping performance in the industry-standard DO-204AC through-hole package, enabling direct replacement in legacy automotive harness assemblies without PCB redesign, while maintaining full 500W 10/1000μs compliance.
Availability
SA8.0C is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver overvoltage clamping requiring stable component supply and long-term lifecycle support.
Supply support for SA8.0C 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 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-environment applications, emphasizing AEC-Q101 qualification, low clamping ratios, and robust surge endurance in axial-leaded packages.
FAQ
What is the polarity configuration of the SA8.0C?
The SA8.0C is a unidirectional TVS diode with clearly marked cathode band indicating the surge-current sink terminal. When installed with cathode toward the protected line (e.g., 12V rail) and anode to ground, it conducts only during reverse overvoltage events-ensuring no forward conduction during normal operation. This polarity is confirmed by mechanical marking diagram in TSC's SA Series datasheet Version L2105 and verified on actual SA8.0C units.
Does the SA8.0C meet AEC-Q101 qualification?
The base SA8.0C part is not AEC-Q101 qualified; however, the SA8.0CH variant-identical in electrical specs and DO-204AC packaging-is fully AEC-Q101 certified per Version L2105 ordering information. Engineers requiring automotive qualification must specify SA8.0CH, which undergoes extended stress testing including HTGB, AC-H3TRB, and temperature cycling per AEC standard.
What is the maximum clamping voltage of the SA8.0C under surge conditions?
The SA8.0C has a maximum clamping voltage (VC) of 15.0V at 25A peak pulse current with 10/1000μs waveform, as specified in the "Maximum Ratings and Electrical Characteristics" table for SA8.0 in TSC's SA Series datasheet Version L2105. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuits during standardized surge events.
How does the SA8.0C compare to bidirectional TVS diodes like SA8.0CA?
The SA8.0C is unidirectional and intended for DC rail protection where polarity is fixed; SA8.0CA is bidirectional with symmetrical breakdown in both directions, suited for AC lines or differential signals. SA8.0C offers lower leakage (<1μA) and tighter clamping ratio than SA8.0CA, but cannot protect against positive-going transients on grounded lines-making SA8.0C the correct choice for 12V automotive power rail applications.
What thermal derating applies to the SA8.0C at elevated ambient temperatures?
The SA8.0C must be derated linearly above TA = 25°C per Figure 2 in TSC's SA Series datasheet Version L2105: peak pulse power drops to ~350W at 75°C and ~150W at 125°C. For steady-state dissipation, PD = 3W is rated at TL = 75°C with 9.5mm lead length on 10×10 mm copper pads-exceeding this requires thermal modeling or forced-air cooling to avoid exceeding TJ max = +175°C.
SA8.0C 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 35A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- 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)
SA8.0C FAQ
1.How can I place an order for SA8.0C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA8.0C 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 SA8.0C reliable?
The price and inventory of SA8.0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA8.0C is usually 5 days.
3.What payment methods are accepted for SA8.0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA8.0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA8.0C?
SA8.0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA8.0C 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 SA8.0C?
For technical support, including SA8.0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA8.0C requirements.
6.How does Aetrix verify that SA8.0C is sourced from the original manufacturer or authorized distributors?
All SA8.0C 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 SA8.0C meets industry standards.
7.What is the process for return or replacement of SA8.0C?
All SA8.0C units undergo pre-shipment inspection (PSI). If there is an issue with SA8.0C, 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 SA8.0C part is unused and in its original packaging.
Return procedure for SA8.0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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