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Taiwan Semiconductor Corporation SA8.0A
- Part No.:
- SA8.0A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA8.0A.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,174
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Product details
Overview
SA8.0A from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode with 8.0V working stand-off voltage, 8.89–9.83V breakdown voltage at 1mA test current, and 13.6V clamping voltage at 25A peak pulse current. It features low leakage (<1μA above 10V), fast response (<1.0ps), and DO-204AC (DO-15) package for automotive-grade ESD and surge protection in power supply rails.
For engineers reviewing the SA8.0A datasheet, SA8.0A pinout, SA8.0A application, or SA8.0A equivalent, this page delivers verified electrical parameters, mechanical packaging details, real-world use cases in lighting and inductive load circuits, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The SA8.0A operates as a unidirectional avalanche diode optimized for transient suppression on DC power lines. Its 8.0V VWM ensures compatibility with 5V logic-supplied systems while maintaining margin against normal operating voltage excursions. The 13.6V VC@25A defines maximum voltage seen by protected circuitry during a 10/1000μs surge event.
Thermal performance is rated to TJ = −55°C to +175°C, with steady-state power dissipation of 3W at TL = 75°C on 10×10 mm copper pads. Polarity is marked by cathode band; lead finish is pure tin per J-STD-002, and molding compound meets UL 94V-0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse voltage before clamping begins; sets operating margin for 5V rail protection. |
| VBR min/max | 8.89–9.83 V @ 1 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 13.6 V @ 25 A - Clamping voltage limits downstream IC stress during 500W 10/1000μs transients. |
| PPK | 500 W - Peak pulse power rating per IEC 61000-4-5 Level 4 surge immunity compliance. |
| IR @ VWM | <1 μA - Negligible leakage preserves battery life and signal integrity in always-on circuits. |
| TJ max | +175 °C - Enables under-hood automotive deployment without thermal derating penalties. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package compatible with legacy through-hole assembly. |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode indicated by band-marked end; anode is unmarked lead. 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 during forward conduction | Connected to ground or low-side return path in unidirectional TVS configuration. |
| Cathode | Current exit point during reverse clamping | Connected to protected line (e.g., 5V rail); cathode band identifies polarity for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | SA8.0AH variant supports automotive powertrain and body electronics with validated reliability testing. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to downstream ICs-critical for 5V logic-level interface protection. |
| Fast response time <1.0 ps | Clamps ESD events before propagation into sensitive analog or digital circuitry. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and global environmental directives for industrial and consumer products. |
| UL 94V-0 molding compound | Ensures flame-retardant behavior in high-energy fault conditions across lighting and power applications. |
Applications
| Automotive Lighting Modules | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs from load-dump transients and alternator ripple in 12V vehicle lighting systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12V input and ground to clamp surges up to 500W. Use Value: Prevents catastrophic failure of buck controllers and gate drivers during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding 24V digital input modules from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs energy from L·di/dt spikes before reaching optocoupler or MCU GPIO. Use Value: Eliminates need for external snubbers while maintaining <1μA leakage for accurate voltage threshold detection. |
| Smart Home Power Supplies | Medical Diagnostic Equipment Interfaces |
Use Scenario: Securing 5V auxiliary rails in AC/DC adapters against EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Primary surge suppression device on secondary-side output before LDO regulators. Use Value: Maintains regulated output stability during 5 kHz burst trains without thermal runaway (TJ ≤ 175°C). | Use Scenario: Shielding isolated USB or RS-485 communication ports from ESD per IEC 61000-4-2 ±8 kV contact discharge. IC Role / Device Role / Timing Role: Fast-clamping TVS on signal lines referenced to local ground plane. Use Value: Limits transient-induced data corruption with sub-nanosecond response and <13.6V clamping ceiling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A | Same VWM (8.0V), identical DO-214AC package; slightly higher VC (13.6V vs 13.6V - matched), but lower PPK (400W vs 500W). | Lower surge rating makes SMAJ8.0A suitable only for Level 3 (not Level 4) IEC 61000-4-5 applications. | Select SMAJ8.0A only if system-level surge requirements are ≤400W and board space favors SMD over axial. |
| P6KE8.0A | Same VWM and DO-204AC package; identical 500W rating but higher VC (14.5V vs 13.6V) and slower response (>1ns). | Higher clamping voltage increases risk of overvoltage damage to 5V logic; not recommended for tight-margin designs. | Prefer SA8.0A where clamping voltage headroom is critical; P6KE8.0A acceptable only if downstream ICs tolerate ≥14.5V transient exposure. |
Compared with SMAJ8.0A and P6KE8.0A, the SA8.0A delivers superior clamping precision (13.6V), full 500W capability, and sub-picosecond response-making it optimal for automotive and industrial designs demanding robust, low-voltage rail protection without layout compromise.
Availability
SA8.0A is available at Aetrix Electronics and suitable for automotive lighting modules, industrial PLC I/O protection, and smart home power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SA8.0A 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 industrial, automotive, and consumer markets.
The SA Series was designed specifically for high-reliability transient suppression in harsh environments-emphasizing low clamping voltage, AEC-Q101 qualification readiness, and consistent DO-204AC form factor across 5V–170V ratings.
FAQ
What is the maximum clamping voltage of the SA8.0A under standard 10/1000μs surge conditions?
The SA8.0A has a maximum clamping voltage (VC) of 13.6 V at 25 A peak pulse current under the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry will not experience more than 13.6 V during a 500W transient event. The SA8.0A datasheet confirms this parameter in Table 2 of Version L2105.
Is the SA8.0A suitable for automotive applications requiring AEC-Q101 qualification?
The base SA8.0A is not AEC-Q101 qualified, but the SA8.0AH variant-identical in all electrical and mechanical specifications-is fully AEC-Q101 certified. For automotive use, specify SA8.0AH; the "H" suffix denotes qualification per stress test requirements including temperature cycling, HTRB, and ESD. TSC documentation confirms SA8.0AH is listed in their AEC-Q101 product portfolio.
What is the reverse leakage current of the SA8.0A at its working stand-off voltage?
The SA8.0A exhibits a maximum reverse leakage current (IR) of 1 μA at its 8.0 V working stand-off voltage (VWM), tested at TA = 25°C. This ultra-low leakage preserves power efficiency in battery-backed or always-on systems and is confirmed in the "Maximum Ratings and Electrical Characteristics" table of the SA Series datasheet (Version L2105, Page 4).
Does the SA8.0A have bidirectional capability, or is it strictly unidirectional?
The SA8.0A is a unidirectional TVS diode, as indicated by its part number suffix "A" and cathode-band marking per DO-204AC mechanical drawing. Bidirectional variants in the SA Series use "CA" suffix (e.g., SA8.0CA). The SA8.0A's electrical specs-including forward voltage and single-direction breakdown-are defined only for unidirectional operation.
What is the junction temperature limit and thermal derating behavior of the SA8.0A?
The SA8.0A has a maximum junction temperature (TJ) of +175°C and a storage range of −55°C to +175°C. Its peak pulse power must be derated linearly above TA = 25°C per Figure 2 in the datasheet, reaching ~50% of 500W at 100°C ambient. Steady-state power dissipation is 3W at TL = 75°C on specified 10×10 mm copper pads.
SA8.0A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 38A
- 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)
SA8.0A FAQ
1.How can I place an order for SA8.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA8.0A 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 SA8.0A reliable?
The price and inventory of SA8.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA8.0A is usually 5 days.
3.What payment methods are accepted for SA8.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA8.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA8.0A?
SA8.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA8.0A 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 SA8.0A?
For technical support, including SA8.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA8.0A requirements.
6.How does Aetrix verify that SA8.0A is sourced from the original manufacturer or authorized distributors?
All SA8.0A 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 SA8.0A meets industry standards.
7.What is the process for return or replacement of SA8.0A?
All SA8.0A units undergo pre-shipment inspection (PSI). If there is an issue with SA8.0A, 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 SA8.0A part is unused and in its original packaging.
Return procedure for SA8.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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