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Taiwan Semiconductor Corporation SA8.0
- Part No.:
- SA8.0
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA8.0.pdf
- Description:
- 500W, 9.9V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,771
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Product details
Overview
SA8.0 from Taiwan Semiconductor is a unidirectional transient voltage suppressor diode (TVS) designed for primary overvoltage protection in DC power rails and signal lines. It features a 8.0 V working stand-off voltage, 8.89–10.9 V breakdown voltage at 1 mA test current, 15.0 V clamping voltage at 25 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in automotive lighting control modules and industrial sensor interfaces.
For engineers reviewing the SA8.0 datasheet, SA8.0 pinout, SA8.0 application, or SA8.0 equivalent, key selection criteria include its DO-204AC (DO-15) package compatibility, low 1 µA reverse leakage at 8.0 V, sub-1 ps response time, AEC-Q101 qualification option (SA8.0H), and precise clamping behavior under repetitive surge stress.
Technical Context
The SA8.0 operates as a silicon avalanche diode with sharp reverse-breakdown characteristics, triggered when transient voltage exceeds its VBR threshold. Its unidirectional polarity enables asymmetric clamping - conducting only during positive overvoltage events relative to cathode, with forward voltage drop ≤3.5 V at 35 A.
Thermal design relies on junction-to-lead thermal resistance optimized for DO-15 mounting on 10 × 10 mm copper pads; maximum junction temperature is rated at 175 °C, supporting operation in under-hood automotive environments and industrial PLC I/O stages without derating below 125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| VBR @ IT = 1 mA | 8.89–10.9 V - Validated avalanche onset range ensuring reliable triggering above normal operating rail. |
| VC @ IPPM = 25 A | 15.0 V - Clamped voltage during 10/1000 µs surge, limiting downstream IC stress to safe levels. |
| IR @ VWM | <1 µA - Negligible standby leakage, critical for battery-backed systems and low-power sensors. |
| PPK | 500 W - Sustains single 10/1000 µs transients up to 25 A without failure, per IEC 61000-4-5 Level 4 compliance margin. |
| TJMAX | 175 °C - Enables placement near heat-generating components in engine control units and motor drives. |
| Response Time | <1.0 ps - Sub-picosecond turn-on ensures protection before sensitive logic or analog circuitry experiences overvoltage damage. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with UL 94V-0 flammability rating and pure tin-plated leads compliant with J-STD-002 solderability. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to system ground or return path; defines clamping reference for positive transients on cathode side. |
| Cathode | Protected line input | Connected to supply rail or signal line requiring protection; conducts surge current to anode during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | SA8.0H meets stress testing for automotive electronics including temperature cycling, HTRB, and ESD robustness. |
| Low clamping ratio (VC/VBR) | 15.0 V / 10.9 V ≈ 1.38 - Minimizes protected circuit overvoltage margin while maintaining reliability. |
| High surge current capability | 25 A peak pulse current supports IEC 61000-4-5 combination wave (1.2/50 µs + 8/20 µs) testing at 1 kV. |
| Halogen-free construction | Complies with IEC 61249-2-21, enabling use in RoHS- and REACH-compliant industrial and automotive assemblies. |
| Whisker-resistant terminations | Passes JESD 201 Class 2 metal whisker testing, eliminating risk of short circuits in high-reliability long-life applications. |
Applications
| Automotive Lighting Control | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LED driver ICs from load-dump transients in 12 V vehicle lighting systems. IC Role / Device Role: Primary clamping element placed between battery rail and driver input. Use Value: Limits voltage to ≤15.0 V during 35 V/100 ms load dump, preventing latch-up or gate oxide rupture in MOSFET drivers. | Use Scenario: Shielding 4–20 mA current-loop transmitters from EFT bursts in factory automation field wiring. IC Role / Device Role: First-stage transient shunt on loop supply input prior to precision regulator. Use Value: Absorbs 500 W surges without degradation, preserving ±0.1% output accuracy across 20-year deployment. |
| DC Power Rail Protection | ESD-Sensitive Microcontroller I/O |
Use Scenario: Safeguarding 5 V/3.3 V microcontroller power inputs against inductive switching noise from relay coils or solenoids. IC Role / Device Role: Standoff-rated TVS placed directly at LDO input capacitor. Use Value: Blocks >8.0 V spikes while drawing <1 µA leakage, avoiding quiescent current penalty in always-on systems. | Use Scenario: Protecting UART or CAN transceiver pins from human-body-model (HBM) ESD events in handheld diagnostic tools. IC Role / Device Role: Low-capacitance unidirectional clamp on TX/RX lines referenced to local ground. Use Value: Responds in <1 ps to 8 kV contact discharge, clamping to 15.0 V before transceiver input stage exceeds absolute max rating. |
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; 8.89–10.9 V VBR, 15.0 V VC @ 25.1 A, but rated for 400 W only. | Lower peak power limits suitability in high-energy load-dump scenarios where SA8.0's 500 W rating provides safety margin. | Select SA8.0 when full IEC 61000-4-5 Level 4 immunity is required; SMAJ8.0A suffices for lower-energy ESD/EFT zones. |
| ON Semiconductor 1.5KE8.0A | DO-201AD package; identical VWM/VBR/VC specs but higher 1.5 kW rating - physically larger and less board-space-efficient. | Not suitable for compact automotive modules due to 5.2 mm lead spacing vs. SA8.0's 5.0 mm DO-15 footprint. | Choose SA8.0 for space-constrained PCB layouts; 1.5KE8.0A fits only when mechanical clearance allows larger body and lead span. |
Compared with SMAJ8.0A and 1.5KE8.0A, the SA8.0 delivers optimal balance of 500 W surge capacity, DO-15 compactness, and AEC-Q101 qualification readiness - making it preferred for next-generation automotive body controllers and industrial edge nodes where size, reliability, and standard compliance are jointly critical.
Availability
SA8.0 is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface, and DC power rail protection requiring stable component supply across extended production lifecycles.
Supply support for SA8.0 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, and rectifiers for automotive, industrial, and consumer markets.
The SA Series was developed specifically for robust, cost-effective transient suppression in harsh-environment electronics - emphasizing low clamping voltage, fast response, and AEC-Q101-ready variants for automotive subsystems.
FAQ
What is the polarity configuration of the SA8.0?
The SA8.0 is a unidirectional TVS diode, meaning it clamps only positive transients applied to its cathode terminal relative to anode. Polarity is marked by a cathode band on the DO-15 body. It must be oriented with cathode toward the protected line and anode to ground or return path - unlike bidirectional variants (e.g., SA8.0CA) which protect both polarities.
Does the SA8.0 meet AEC-Q101 qualification?
The base SA8.0 is not AEC-Q101 qualified; however, the SA8.0H variant - identifiable by the "H" suffix in the ordering code - undergoes full AEC-Q101 stress testing including HTGB, H3TRB, and temperature cycling. SA8.0H is recommended for automotive powertrain and chassis applications where qualification is mandatory.
What is the maximum clamping voltage of the SA8.0 under surge conditions?
The SA8.0 has a maximum clamping voltage (VC) of 15.0 V when subjected to its rated peak pulse current of 25 A using the 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures protected circuits remain within safe voltage margins during standardized surge events.
Can the SA8.0 be used in bidirectional protection applications?
No - the SA8.0 is strictly unidirectional. For bidirectional protection, select the SA8.0CA variant (if offered) or a dedicated bidirectional TVS such as the SA8.0C. Using SA8.0 in reverse-biased configurations risks permanent breakdown or failure, as its anode-to-cathode reverse standoff is not specified beyond VWM.
How does the SA8.0 compare to the SA8.0A variant?
The SA8.0A offers tighter breakdown voltage tolerance (8.89–9.83 V vs. 8.89–10.9 V for SA8.0) and lower clamping voltage (13.6 V vs. 15.0 V at 25 A), resulting in enhanced protection margin for precision 3.3 V or 5 V systems. SA8.0A is preferred where strict voltage headroom is critical, while SA8.0 provides broader process tolerance for cost-sensitive high-volume applications.
SA8.0 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:
- 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)
SA8.0 FAQ
1.How can I place an order for SA8.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA8.0 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 SA8.0 reliable?
The price and inventory of SA8.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA8.0 is usually 5 days.
3.What payment methods are accepted for SA8.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA8.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA8.0?
SA8.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA8.0 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 SA8.0?
For technical support, including SA8.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA8.0 requirements.
6.How does Aetrix verify that SA8.0 is sourced from the original manufacturer or authorized distributors?
All SA8.0 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 SA8.0 meets industry standards.
7.What is the process for return or replacement of SA8.0?
All SA8.0 units undergo pre-shipment inspection (PSI). If there is an issue with SA8.0, 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 SA8.0 part is unused and in its original packaging.
Return procedure for SA8.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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