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Vishay General Semiconductor - Diodes Division SA8.0-E3/73
- Part No.:
- SA8.0-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA8.0-E3/73.pdf
- Description:
- TVS DIODE 8VWM 15VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,700
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Product details
Overview
SA8.0-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. It features 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 1 mA, 13.6 V maximum clamping voltage (VC) at 25 A peak pulse current, 500 W peak pulse power rating (10/1000 μs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA8.0-E3/73 datasheet, SA8.0-E3/73 pinout, SA8.0-E3/73 application, or SA8.0-E3/73 equivalent, this device is selected for robust ESD and surge protection in 12 V automotive subsystems, industrial sensor interfaces, and low-voltage DC power inputs where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.45), and stable junction temperature up to +175 °C are required.
Technical Context
The SA8.0-E3/73 operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-nanosecond response to transients. Its 8.0 V stand-off voltage allows reliable blocking during normal 12 V system operation while triggering conduction above ~8.9 V breakdown threshold.
It delivers 500 W peak pulse power under standardized 10/1000 μs waveform with 0.01 % duty cycle, and maintains clamping performance across -55 °C to +175 °C operating junction temperature range - critical for under-hood automotive environments and industrial control cabinets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse voltage before leakage exceeds 25 μA; sets safe operating margin for 12 V nominal systems. |
| VBR min/max | 8.89 V / 9.83 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 13.6 V at 25 A - Clamped voltage during worst-case 10/1000 μs surge; limits downstream IC stress to <14 V. |
| PPPM | 500 W - Peak transient energy absorption capability; supports ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 compliance. |
| IFSM | 70 A - Non-repetitive forward surge rating; enables survival of accidental polarity reversal or load dump events. |
| TJ max | +175 °C - Maximum junction temperature; permits use in high-ambient under-hood locations without derating. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with matte tin-plated leads, RoHS-compliant (E3 suffix), UL 94 V-0 molding. |
Pinout & Package
SA8.0-E3/73 uses a two-terminal DO-204AC (DO-15) axial package. The cathode is marked by a color band on the body; anode is unmarked. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping. |
| Cathode | Protected line connection / Surge sink | Connected to protected node (e.g., 12 V rail); voltage clamps to ≤13.6 V when transients exceed VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under thermal cycling. |
| 500 W peak pulse power (10/1000 μs) | Supports high-energy transients common in automotive load-dump and inductive switching events. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensors. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream MOSFETs, regulators, and microcontrollers. |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance; suitable for lead-free reflow and wave soldering processes. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V power input of engine control module (ECM) against ISO 7637-2 load dump pulses and alternator ripple. IC Role / Device Role / Timing Role: Primary unidirectional TVS clamp placed between battery feed and input filter capacitor. Use Value: Limits transient voltage to ≤13.6 V, preventing damage to upstream DC-DC converters and MCU power supplies. |
Use Scenario: Safeguarding analog output (4–20 mA) and digital I/O lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry surge suppressor on sensor interface PCB, mounted adjacent to connector. Use Value: Responds in <1 ns to ESD (IEC 61000-4-2 ±8 kV contact) and surge (IEC 61000-4-5 1 kV), preserving signal integrity. |
| Consumer Power Adapter Interface | Telecom DC Power Feeding Protection |
|
Use Scenario: Overvoltage suppression on 5 V/9 V/12 V USB-C PD adapter outputs exposed to cable-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS after primary regulator, guarding connected mobile devices and accessories. Use Value: Clamps fast-rising transients (<100 ns rise time) without affecting steady-state regulation or efficiency. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras, wireless APs) from induced surges on 48 V DC feeding lines. IC Role / Device Role / Timing Role: Unidirectional clamp on PSE-side or PD-side DC bus, coordinated with upstream MOVs. Use Value: Withstands repetitive 500 W pulses while maintaining <25 μA leakage at 8.0 V, ensuring low standby loss. |
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 (8.0 V), identical DO-214AC (SMA) package; slightly higher VC (13.6 V same), but lower PPPM (400 W). | Surface-mount alternative requiring PCB layout change; better suited for space-constrained consumer boards. | Select SMAJ8.0A only if SMT assembly is mandatory and 400 W pulse rating suffices for target surge profile. |
| 1.5KE8.0A | Same VWM (8.0 V), larger DO-201AD package; higher PPPM (1500 W), higher VC (13.6 V), and higher IFSM (100 A). | Used in high-energy industrial motor drives and telecom rectifier modules where bulk energy handling is prioritized. | Choose 1.5KE8.0A when system-level surge tests require >500 W rating or legacy through-hole footprint compatibility is needed. |
Compared with SMAJ8.0A and 1.5KE8.0A, SA8.0-E3/73 offers optimal balance of AEC-Q101 qualification, DO-15 axial form factor for manual repair and high-voltage creepage, and verified 500 W pulse performance - making it the preferred choice for automotive and industrial through-hole designs demanding certified reliability.
Availability
SA8.0-E3/73 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, and telecom DC feeding applications requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for SA8.0-E3/73 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated at the component level.
FAQ
What is the clamping voltage of SA8.0-E3/73 at its rated peak pulse current?
The SA8.0-E3/73 has a maximum clamping voltage (VC) of 13.6 V at 25 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value is confirmed in the Vishay datasheet Document Number 88378, page 2, Electrical Characteristics table. The clamping performance ensures protected circuits remain below critical overvoltage thresholds during surge events, and SA8.0-E3/73 maintains this specification across its full operating temperature range.
Is SA8.0-E3/73 suitable for automotive applications?
Yes, SA8.0-E3/73 is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet revision 18-Sep-12 (Document Number 88378, page 1, FEATURES section). This certification validates its reliability for automotive powertrain, chassis, and body electronics. The SA8.0-E3/73 operates from -55 °C to +175 °C and withstands mechanical, thermal, and electrical stress profiles defined in AEC-Q101, making it appropriate for under-hood and cabin-mounted systems.
What does the "E3" suffix mean in SA8.0-E3/73?
The "E3" suffix in SA8.0-E3/73 indicates RoHS-compliant construction with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance requirements. Per Vishay documentation (page 1, MECHANICAL DATA), E3 denotes commercial-grade RoHS compliance, while HE3 denotes AEC-Q101-qualified RoHS parts. SA8.0-E3/73 is E3-coded and also AEC-Q101 qualified, confirming dual compliance - a key distinction verified in the ordering information and notes sections of the datasheet.
How does SA8.0-E3/73 differ from bi-directional SA8.0CA variants?
SA8.0-E3/73 is unidirectional, with a cathode band marking and forward conduction capability (VF = 3.5 V at 100 A), whereas SA8.0CA is bi-directional, unmarked, and blocks voltage in both directions. The SA8.0-E3/73 datasheet specifies IFSM = 70 A and VF testing - parameters absent for CA types. Its breakdown voltage (8.89–9.83 V) applies only in reverse; SA8.0CA would exhibit symmetric VBR in both polarities. This makes SA8.0-E3/73 ideal for DC rail protection, not AC or differential signal lines.
What is the maximum junction temperature rating for SA8.0-E3/73?
The maximum junction temperature (TJ max) for SA8.0-E3/73 is +175 °C, as specified in the "PRIMARY CHARACTERISTICS" table (page 1) and "MAXIMUM RATINGS" table (page 2) of the Vishay datasheet. This rating enables operation in high-ambient environments such as engine compartments or enclosed industrial enclosures. Derating curves (Fig. 2 and Fig. 5) define allowable power and pulse current reduction above 25 °C ambient, ensuring SA8.0-E3/73 remains within safe thermal limits throughout its lifetime.
SA8.0-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- 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):
- 33.3A
- 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)
SA8.0-E3/73 FAQ
1.How can I place an order for SA8.0-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA8.0-E3/73 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-E3/73 reliable?
The price and inventory of SA8.0-E3/73 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-E3/73 is usually 5 days.
3.What payment methods are accepted for SA8.0-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA8.0-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA8.0-E3/73?
SA8.0-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA8.0-E3/73 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-E3/73?
For technical support, including SA8.0-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA8.0-E3/73 requirements.
6.How does Aetrix verify that SA8.0-E3/73 is sourced from the original manufacturer or authorized distributors?
All SA8.0-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of SA8.0-E3/73?
All SA8.0-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA8.0-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for SA8.0-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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