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Vishay General Semiconductor - Diodes Division SA8.5CHE3/73
- Part No.:
- SA8.5CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA8.5CHE3/73.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,659
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Product details
Overview
SA8.5CHE3/73 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features 500 W peak pulse power (10/1000 μs), 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR at 1 mA), and clamps to ≤14.4 V at 34.7 A peak pulse current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SA8.5CHE3/73 datasheet, SA8.5CHE3/73 pinout, SA8.5CHE3/73 application, or SA8.5CHE3/73 equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, DO-15 mechanical data, clamping behavior under surge, and direct alternatives for circuit-level ESD/surge hardening.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical VBR, VC, and leakage characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance, enabling consistent clamping during repetitive 10/1000 μs transients up to 0.01% duty cycle.
The device meets AEC-Q101 stress test requirements for automotive use and supports operating junction temperatures from –55 °C to +175 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the HE3 suffix confirms JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below system rail. |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - Ensures reliable triggering above VWM while avoiding false trips near nominal voltage. |
| VC @ IPPM | ≤14.4 V at 34.7 A - Clamping voltage limits downstream IC stress during 500 W transient events. |
| PPPM | 500 W (10/1000 μs) - Sustains high-energy surges common in automotive load-dump or inductive switching. |
| ID @ VWM | 10 μA max - Low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ range | –55 °C to +175 °C - Supports under-hood automotive and industrial environments without derating. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package compatible with through-hole assembly and manual repair. |
Pinout & Package
SA8.5CHE3/73 uses a bi-directional configuration in DO-204AC (DO-15) package with no polarity marking - both terminals are functionally identical. The device has two axial leads, unmarked, intended for symmetric placement across differential or AC-coupled lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bi-directional transient clamp node | Either terminal accepts positive or negative surge; no cathode band - enables flexible PCB layout on bidirectional lines. |
| Anode/Cathode (unmarked) | Bi-directional transient clamp node | Identical electrical behavior in both directions; eliminates orientation-dependent assembly errors. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| Glass passivated junction | Ensures stable VBR over temperature and lifetime, with minimal parameter drift under thermal cycling. |
| 500 W peak pulse power (10/1000 μs) | Withstands high-energy transients from relay coil decay, motor commutation, or ESD coupling into harnesses. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with sensors. |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and UL 94 V-0 flammability for safety-critical assemblies. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional clamping element placed at connector interface to shunt surge energy before it reaches signal conditioning ICs. Use Value: Maintains signal integrity during 500 W transients while operating within AEC-Q101 automotive reliability requirements. |
Use Scenario: Safeguarding 24 V DC digital input modules against field-wiring induced surges and ground bounce in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or optocoupler input stages exposed to long cable runs. Use Value: Limits voltage to ≤14.4 V during 34.7 A surges, preventing latch-up or damage to microcontroller GPIOs. |
| Consumer Appliance Motor Control | Telecom Line Interface Protection |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Snubber-style TVS mounted across motor terminals or H-bridge outputs to absorb inductive kick. Use Value: Handles repetitive 10/1000 μs pulses at 0.01% duty cycle without degradation - extends system MTBF. |
Use Scenario: Protecting RS-485/RS-232 transceivers and Ethernet PHYs from lightning-induced surges on building entry lines. IC Role / Device Role / Timing Role: First-line transient suppressor on line-side of isolation barrier or common-mode choke. Use Value: Symmetric clamping ensures equal protection for differential pairs without polarity sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5CA | Same VWM (8.5 V), same DO-214AC (SMA) package, but lower PPPM = 400 W and higher VC = 15.0 V at 27.5 A. | Suitable for space-constrained PCBs where surface-mount is required; less robust for high-energy automotive transients. | Select SMAJ8.5CA only when board area is limited and surge energy remains ≤400 W. |
| 1.5KE8.5CA | Higher PPPM = 1500 W, larger DO-201AD package, VC = 13.4 V at 112 A, but not AEC-Q101 qualified. | Better for industrial power supply inputs or telecom central office equipment where qualification is secondary to energy handling. | Choose 1.5KE8.5CA when >500 W surge immunity is mandatory and automotive qualification is not required. |
Compared with SMAJ8.5CA and 1.5KE8.5CA, SA8.5CHE3/73 uniquely balances AEC-Q101 compliance, 500 W capability, and DO-15 through-hole manufacturability - making it optimal for automotive and industrial designs requiring traceable qualification and legacy assembly compatibility.
Availability
SA8.5CHE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer appliance motor control systems requiring stable component supply and full AEC-Q101 documentation traceability.
Supply support for SA8.5CHE3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SAxxxC series was engineered specifically for bi-directional transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where symmetrical clamping and AEC-Q101 compliance are mandatory.
FAQ
What is the polarity configuration of SA8.5CHE3/73?
SA8.5CHE3/73 is a bi-directional TVS diode with no polarity marking - both terminals are functionally identical and provide symmetrical clamping in either direction. This eliminates orientation concerns during assembly and supports AC-coupled or differential signal protection without circuit redesign.
Is SA8.5CHE3/73 qualified for automotive applications?
Yes, SA8.5CHE3/73 carries the HE3 suffix, confirming AEC-Q101 qualification per Vishay's documentation. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life - making it suitable for under-hood and body-control module deployments.
What is the maximum clamping voltage of SA8.5CHE3/73 under surge conditions?
The maximum clamping voltage (VC) of SA8.5CHE3/73 is 14.4 V at 34.7 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet and defines the upper voltage limit imposed on protected circuitry during transient events.
Can SA8.5CHE3/73 replace SA8.5A in a design?
No - SA8.5CHE3/73 is bi-directional (CA suffix), while SA8.5A is uni-directional (A suffix). Substituting SA8.5CHE3/73 for SA8.5A introduces reverse conduction path that may disrupt DC bias or cause unintended current flow; verify circuit topology before interchange.
What does the "HE3" suffix indicate in SA8.5CHE3/73?
The "HE3" suffix denotes RoHS-compliant construction with JESD 201 Class 2 whisker resistance and AEC-Q101 qualification. It distinguishes SA8.5CHE3/73 from commercial-grade "E3" variants and confirms suitability for automotive and high-reliability industrial applications.
SA8.5CHE3/73 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 15.9V
- Current - Peak Pulse (10/1000µs):
- 31.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- 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)
SA8.5CHE3/73 FAQ
1.How can I place an order for SA8.5CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA8.5CHE3/73 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 SA8.5CHE3/73 reliable?
The price and inventory of SA8.5CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA8.5CHE3/73 is usually 5 days.
3.What payment methods are accepted for SA8.5CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA8.5CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA8.5CHE3/73?
SA8.5CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA8.5CHE3/73 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 SA8.5CHE3/73?
For technical support, including SA8.5CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA8.5CHE3/73 requirements.
6.How does Aetrix verify that SA8.5CHE3/73 is sourced from the original manufacturer or authorized distributors?
All SA8.5CHE3/73 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 SA8.5CHE3/73 meets industry standards.
7.What is the process for return or replacement of SA8.5CHE3/73?
All SA8.5CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA8.5CHE3/73, 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 SA8.5CHE3/73 part is unused and in its original packaging.
Return procedure for SA8.5CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA8.5CHE3/73 Tags
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