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Vishay General Semiconductor - Diodes Division SA64-E3/73
- Part No.:
- SA64-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA64-E3/73.pdf
- Description:
- TVS DIODE 64VWM 114VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,109
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Product details
Overview
SA64-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 a 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, 103 V maximum clamping voltage (VC) at 4.9 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 SA64-E3/73 datasheet, SA64-E3/73 pinout, SA64-E3/73 application, or SA64-E3/73 equivalent, this component serves as a robust, RoHS-compliant, lead-free transient suppressor for automotive infotainment power inputs, industrial sensor I/O protection, and telecom line interface surge immunity - with verified clamping performance, low leakage (<1.0 µA at VWM), and stable temperature coefficient (±0.076 %/°C).
Technical Context
The SA64-E3/73 operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transients while remaining high-impedance under normal operating conditions. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and fast response time (<1.0 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
It is rated for 70 A non-repetitive forward surge current (IFSM, 10 ms half-sine), supports continuous power dissipation of 3.0 W on infinite heatsink at TL = 75 °C, and maintains operation across –55 °C to +175 °C junction temperature range - meeting automotive under-hood thermal requirements without derating below 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 48 V or 60 V nominal systems. |
| VBR (min/max) | 71.1 V / 78.6 V at 1 mA - Tight 5 % tolerance ensures predictable turn-on and avoids false triggering during normal voltage ripple. |
| VC @ IPPM | 103 V at 4.9 A (10/1000 µs) - Clamps transients to safe levels for downstream 100 V-rated MOSFETs or logic ICs. |
| PPPM | 500 W - Sustains high-energy surges per ISO 7637-2 Pulse 1/2b/5a without degradation; validated at 0.01 % duty cycle. |
| ID @ VWM | <1.0 µA - Negligible leakage preserves battery life in always-on automotive modules and low-power sensor nodes. |
| TJ max | +175 °C - Enables placement near heat-generating components (e.g., power converters) without thermal derating penalties. |
| AEC-Q101 | Qualified - Certified for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case with UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward conduction terminal | Connected to system ground or low-side return path; enables unidirectional clamping from protected line to GND. |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V rail); avalanche conduction occurs when line-to-ground voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term VBR stability and low parameter drift over 15+ years in automotive environments. |
| 500 W peak pulse power (10/1000 µs) | Withstands repeated ISO 16750-2 load dump surges up to 120 V without parametric shift or failure. |
| AEC-Q101 qualification | Validated for temperature cycling (–40 °C to +125 °C, 1000 cycles), mechanical shock, and humidity testing per automotive stress protocols. |
| RoHS-compliant, E3 suffix | Meets JESD 201 Class 1A whisker resistance, eliminating tin whisker risk in high-reliability PCB assemblies. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT bursts), improving protection margin for sensitive analog front-ends. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump transients (ISO 16750-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V supply rail and chassis ground to clamp surges >80 V within nanoseconds. Use Value: Limits peak voltage to ≤103 V, preventing damage to 100 V-rated buck controllers and CAN transceivers downstream. |
Use Scenario: Shielding 4–20 mA current loop inputs in PLC analog I/O modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Series-connected TVS on loop supply line, referenced to local ground, absorbing 1 kV/500 A surge events. Use Value: Maintains <1 µA leakage at 24 V, avoiding measurement error in precision current sensing circuits. |
| Telecom Line Interface Protection | Consumer Power Adapter Output Protection |
|
Use Scenario: Safeguarding Ethernet PHY power pins (e.g., PoE PSE side) from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on VDD and return paths, coordinated with common-mode chokes. Use Value: Achieves <10 ns response time and clamps 10/1000 µs surges to <110 V, preserving IEEE 802.3af/at compliance. |
Use Scenario: Adding secondary-side overvoltage protection to 19 V laptop adapter outputs against regulator fault conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS across output capacitor to shunt fault energy before downstream USB-C PD controller resets. Use Value: Triggers at 64 V (well above 20 V max nominal), ensuring no interference during normal operation or inrush. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-E3/57T | Same VWM (64 V), identical DO-214AC (SMA) package; slightly higher VC (104 V @ 4.8 A), lower IPPM (4.8 A vs. 4.9 A). | Surface-mount alternative requiring PCB rework; better suited for space-constrained designs where axial leads are impractical. | Select SMAJ64A-E3/57T when board real estate is limited and reflow compatibility is required. |
| 1.5KE68A | Higher PPPM (1500 W), larger DO-201AD package; wider VBR tolerance (±10 %), higher VC (118 V @ 12.7 A), no AEC-Q101 qualification. | Targeted at industrial AC mains protection; lacks automotive qualification and tighter VBR spec needed for precision DC rail clamping. | Choose 1.5KE68A only for non-automotive, high-energy surge scenarios where footprint and qualification are secondary. |
Compared with SMAJ64A-E3/57T and 1.5KE68A, the SA64-E3/73 offers optimal balance of automotive qualification, tight 5 % VBR tolerance, and axial-leaded ease of prototyping - making it preferred for production-grade 48 V automotive modules where reliability and test repeatability are critical.
Availability
SA64-E3/73 is available at Aetrix Electronics and suitable for automotive ECU power protection, industrial sensor interface hardening, and telecom line surge immunity requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SA64-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and automotive-grade validation.
The SAxx series was engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum clamping voltage of the SA64-E3/73 under standard test conditions?
The SA64-E3/73 has a maximum clamping voltage (VC) of 103 V when subjected to a 10/1000 µs waveform at 4.9 A peak pulse current. This value is measured per JEDEC standards and reflects the upper limit of voltage seen by protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is the SA64-E3/73 suitable for automotive applications?
Yes, the SA64-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use. It meets rigorous stress tests including temperature cycling, mechanical shock, and humidity exposure. Its –55 °C to +175 °C operating range, RoHS-compliant E3 plating, and glass-passivated junction make it appropriate for engine control units, body control modules, and ADAS sensor interfaces where reliability is non-negotiable.
How does the SA64-E3/73 differ from bi-directional TVS diodes like SA64CA?
The SA64-E3/73 is unidirectional and conducts only in reverse bias, making it ideal for DC power rail protection where polarity is fixed. In contrast, SA64CA is bi-directional and clamps both positive and negative transients - used in AC-coupled or floating signal lines. The SA64-E3/73 offers lower leakage (<1.0 µA) and tighter VBR tolerance (±5 %) than its bi-directional counterpart, which trades some precision for symmetrical clamping.
What is the meaning of the "E3/73" suffix in SA64-E3/73?
The "E3" denotes RoHS-compliant, matte tin-plated leads meeting JESD 201 Class 1A whisker resistance, while "73" indicates packaging in 7-inch diameter tape-and-reel with 4000 units per reel - conforming to Vishay's standard ordering code for DO-204AC devices. This ensures compatibility with automated SMT placement equipment and satisfies environmental compliance requirements for global markets.
Can the SA64-E3/73 be used in parallel for higher surge current handling?
No - parallel connection of SA64-E3/73 devices is not recommended due to mismatch in VBR and dynamic impedance, which causes uneven current sharing and potential single-device failure. For higher surge capability, select a higher-rated part (e.g., SA70A or SA75A) or implement staged protection with upstream current-limiting resistors and downstream TVS arrays validated for coordinated clamping behavior.
SA64-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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 114V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- 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)
SA64-E3/73 FAQ
1.How can I place an order for SA64-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA64-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 SA64-E3/73 reliable?
The price and inventory of SA64-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 SA64-E3/73 is usually 5 days.
3.What payment methods are accepted for SA64-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA64-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA64-E3/73?
SA64-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA64-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 SA64-E3/73?
For technical support, including SA64-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA64-E3/73 requirements.
6.How does Aetrix verify that SA64-E3/73 is sourced from the original manufacturer or authorized distributors?
All SA64-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 SA64-E3/73 meets industry standards.
7.What is the process for return or replacement of SA64-E3/73?
All SA64-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA64-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 SA64-E3/73 part is unused and in its original packaging.
Return procedure for SA64-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA64-E3/73 Tags
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