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Vishay General Semiconductor - Diodes Division SA8.5CAHE3/54
- Part No.:
- SA8.5CAHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA8.5CAHE3/54.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,873
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Product details
Overview
SA8.5CAHE3/54 from Vishay General Semiconductor is a bidirectional TransZORB® transient voltage suppressor diode in DO-15 package, rated for 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 10 A peak pulse current. It protects signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SA8.5CAHE3/54 datasheet, SA8.5CAHE3/54 pinout, SA8.5CAHE3/54 application, or SA8.5CAHE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-15 mechanical dimensions, clamping behavior under 10/1000 μs surge, and direct alternatives for bidirectional TVS selection in harsh-environment electronics.
Technical Context
This device operates as a bidirectional avalanche diode with symmetrical breakdown in both polarities, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low incremental surge resistance, critical for consistent clamping across temperature.
Designed for repetitive surge duty cycles up to 0.01 %, it maintains thermal stability up to 175 °C junction temperature and supports soldering per JESD 22-B106 (275 °C, 10 s). The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - Ensures predictable turn-on within tight tolerance for reliable transient capture |
| VC @ IPPM | 14.4 V at 10 A - Clamped voltage during 10/1000 μs surge; determines maximum stress on downstream ICs |
| PPPM | 500 W - Peak pulse power handling capability; validates robustness against ISO 7637-2 Pulse 1/2a/5a surges |
| ID @ VWM | 1.0 μA - Ultra-low leakage at stand-off voltage; prevents signal distortion in high-impedance sensor interfaces |
| TJ max | 175 °C - Enables operation in under-hood automotive environments without derating |
| Package | DO-15 (DO-204AC) - Industry-standard axial leaded package compatible with legacy through-hole assembly |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with matte tin-plated leads; no polarity marking for bidirectional configuration - terminals are functionally identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either lead serves as input/output; no cathode band - enables blind insertion and eliminates orientation errors in PCB layout |
| Lead 1 | Current path terminal | Carries full surge current in either direction; designed for 70 A non-repetitive forward surge (unidirectional rating applies only to A-suffix variants) |
| Lead 2 | Current path terminal | Electrically identical to Lead 1; symmetric construction ensures matched clamping in ± polarity events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements |
| Glass-passivated junction | Ensures long-term VBR stability and resistance to humidity-induced parameter drift over 15+ year service life |
| 500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 Level 4 (4 kV) surge immunity when used with appropriate series impedance |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes let-through energy to protected ICs, reducing risk of latch-up or gate oxide damage in MOSFET drivers |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed modules, satisfying automotive and industrial safety compliance requirements |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector interface to shunt transients before reaching signal conditioning circuitry. Use Value: Limits voltage excursion to ≤14.4 V during 10 A surge, preserving integrity of 5 V or 3.3 V microcontrollers and ADC inputs. | Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to relay coil switching noise and motor drive coupling in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V DC input terminals, operating in parallel with optocoupler input stages. Use Value: Withstands repetitive 500 W surges while maintaining <1 μA leakage, preventing false triggering of high-impedance input comparators. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station equipment from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary protection device in multi-stage architecture, absorbing bulk energy before secondary TVS or GDT stages. Use Value: Clamps within 1 ns response time to limit peak voltage to 14.4 V, meeting Telcordia GR-1089-CORE Level 3 surge requirements. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to microcontroller GPIOs. IC Role / Device Role / Timing Role: Low-leakage bidirectional clamp mounted at motor driver IC output pins to prevent back-EMF damage. Use Value: Maintains 8.5 V stand-off margin while clamping 10 A spikes to 14.4 V, protecting 5 V logic-level MOSFET gate drivers from overvoltage failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5CA | Same VWM (8.5 V), lower PPPM (400 W), SMA package (surface-mount) | Requires PCB rework for SMT assembly; unsuitable for through-hole legacy designs | Select SMAJ8.5CA only when board space is constrained and reflow compatibility is confirmed |
| 1.5KE8.5CA | Higher PPPM (1500 W), DO-201 package (larger footprint), same VWM/VBR range | Better suited for high-energy industrial surges but incompatible with DO-15 footprint | Choose 1.5KE8.5CA when system-level testing requires >500 W surge margin and board layout allows larger case |
Compared with SMAJ8.5CA and 1.5KE8.5CA, SA8.5CAHE3/54 uniquely balances AEC-Q101 qualification, DO-15 through-hole compatibility, and 500 W surge capacity - making it optimal for automotive and industrial replacements where footprint and qualification alignment are mandatory.
Availability
SA8.5CAHE3/54 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer appliance motor controllers requiring stable component supply with AEC-Q101 assurance.
Supply support for SA8.5CAHE3/54 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, and transient protection devices with emphasis on reliability and automotive-grade validation.
The SAxxCA series targets high-reliability transient suppression in harsh environments, with design focus on bidirectional clamping performance, thermal robustness, and compliance with AEC-Q101 and UL 94 V-0 standards.
FAQ
What is the clamping voltage of SA8.5CAHE3/54 at its rated peak pulse current?
The SA8.5CAHE3/54 clamps to a maximum of 14.4 V at 10 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Figure 9 in Vishay document 88378 and defines the upper voltage limit imposed on protected circuitry during surge events. The SA8.5CAHE3/54 achieves this with low incremental clamping resistance, ensuring minimal let-through energy to downstream components.
Is SA8.5CAHE3/54 suitable for automotive applications?
Yes, SA8.5CAHE3/54 is AEC-Q101 qualified (HE3 suffix), tested for temperature cycling, humidity bias, and mechanical shock per automotive reliability standards. Its 175 °C maximum junction temperature, glass-passivated junction, and DO-15 package with matte tin leads meet requirements for engine bay and chassis-mounted electronics. The SA8.5CAHE3/54 is explicitly listed in Vishay's AEC-Q101 qualified products table.
How does the bidirectional nature of SA8.5CAHE3/54 affect its PCB layout?
The SA8.5CAHE3/54 has no polarity marking and functions identically in either orientation, allowing blind insertion into DO-15 footprints without orientation verification. This eliminates risk of reverse installation and simplifies automated assembly. Unlike unidirectional TVS diodes, the SA8.5CAHE3/54 does not require cathode alignment - both leads serve as symmetrical surge current paths.
What is the maximum leakage current of SA8.5CAHE3/54 at its stand-off voltage?
At its 8.5 V stand-off voltage (VWM), the SA8.5CAHE3/54 exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, per Table on page 2 of Vishay document 88378. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and prevents false triggering in comparator-based detection circuits. The SA8.5CAHE3/54 maintains this specification across its full operating temperature range.
Can SA8.5CAHE3/54 replace unidirectional SA8.5A in existing designs?
No - SA8.5CAHE3/54 is bidirectional and lacks polarity marking, whereas SA8.5A is unidirectional with a cathode band. Substituting SA8.5CAHE3/54 for SA8.5A may cause improper clamping in DC-biased circuits and violates the intended circuit topology. The SA8.5CAHE3/54 should only replace other CA-suffix bidirectional parts unless the system design explicitly accommodates symmetrical transient suppression.
SA8.5CAHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 34.7A
- 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)
SA8.5CAHE3/54 FAQ
1.How can I place an order for SA8.5CAHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA8.5CAHE3/54 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 SA8.5CAHE3/54 reliable?
The price and inventory of SA8.5CAHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA8.5CAHE3/54 is usually 5 days.
3.What payment methods are accepted for SA8.5CAHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA8.5CAHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA8.5CAHE3/54?
SA8.5CAHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA8.5CAHE3/54 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 SA8.5CAHE3/54?
For technical support, including SA8.5CAHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA8.5CAHE3/54 requirements.
6.How does Aetrix verify that SA8.5CAHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA8.5CAHE3/54 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 SA8.5CAHE3/54 meets industry standards.
7.What is the process for return or replacement of SA8.5CAHE3/54?
All SA8.5CAHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA8.5CAHE3/54, 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 SA8.5CAHE3/54 part is unused and in its original packaging.
Return procedure for SA8.5CAHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA8.5CAHE3/54 Tags
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