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Vishay General Semiconductor - Diodes Division SMA5J8.5CAHE3_A/H
- Part No.:
- SMA5J8.5CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5CAHE3_A/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,085
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Product details
Overview
SMA5J8.5CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR), 14.4 V clamping voltage (VC) at 10 A peak pulse current, and 500 W peak pulse power rating - ideal for automotive sensor line and industrial I/O port protection.
For engineers reviewing the SMA5J8.5CAHE3_A/H datasheet, SMA5J8.5CAHE3_A/H pinout, SMA5J8.5CAHE3_A/H application, or SMA5J8.5CAHE3_A/H equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at VWM), while the bidirectional structure enables symmetrical clamping in AC-coupled or floating signal paths.
The SMA5J8.5CAHE3_A/H is rated for 500 W peak pulse power under 10/1000 μs waveform, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead). It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive under-hood and chassis applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 9.44 V / 10.4 V at 1.0 mA - precise breakdown threshold enabling predictable turn-on during overvoltage events |
| VC @ IPPM | 14.4 V at 10 A - clamping voltage limits downstream IC stress during 10/1000 μs surges |
| PPPM | 500 W - peak pulse power handling capacity on standard 5.0 mm × 5.0 mm PCB copper pads |
| ID @ VWM | <1.0 μA - ultra-low leakage preserves signal integrity in high-impedance sensor interfaces |
| TJ max | +150 °C - supports operation in under-hood automotive environments and industrial enclosures |
| Package | SMA (DO-214AC) - surface-mount package with 2.54 mm lead pitch, compatible with standard reflow profiles |
Pinout & Package
Two-terminal bidirectional device in SMA (DO-214AC) package; no polarity marking. Cathode band absent - terminals are symmetric and interchangeable. Package dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), with 2.54 mm lead spacing and matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical bidirectional clamping function; no fixed anode/cathode designation |
| Case (body) | Thermal and mechanical interface | Plastic molded body provides UL 94 V-0 flammability rating and mechanical robustness for board-level mounting |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled, differential, or floating signal lines without polarity constraints |
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control, ADAS sensors, and infotainment interfaces |
| Glass-passivated junction | Ensures stable VBR tolerance, low leakage, and long-term parameter stability under thermal cycling |
| MSL Level 1 rating | Allows unlimited floor life and compatibility with standard SMT reflow processes up to 260 °C peak |
| Low Rsurge | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a), improving system immunity |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt TVS device that clamps transients above 8.5 V to ≤14.4 V, preserving signal fidelity and preventing MCU input latch-up. Use Value: Enables compliance with ISO 16750-2 and ISO 7637-2 test pulses without external series impedance or filtering. | Use Scenario: Safeguarding PLC digital input modules against field-wiring surges and ground-loop transients in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across input terminals to divert surge energy before reaching optocoupler or level-shifter inputs. Use Value: Maintains functional safety integrity by limiting transient-induced false triggering and component degradation over 100,000+ cycles. |
| Telecom Line Interface | Consumer USB/Display Port ESD Guard |
Use Scenario: Protecting RS-485 transceivers and Ethernet PHYs from lightning-induced surges on outdoor cabling in telecom base stations. IC Role / Device Role / Timing Role: Primary front-end TVS suppressing common-mode transients up to 500 W before secondary protection stages. Use Value: Reduces need for multi-stage protection, lowering BOM count and PCB area while meeting IEC 61000-4-5 Level 3 (1 kV/2 Ω). | Use Scenario: ESD and surge suppression on HDMI, USB 2.0, or DisplayPort hot-swap connectors in laptops and docking stations. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector pins to absorb ±15 kV contact ESD (IEC 61000-4-2) and cable discharge events. Use Value: Prevents permanent damage to SerDes PHYs and maintains signal integrity up to 2.5 Gbps with <1 pF junction capacitance impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No difference in automotive or industrial use; preferred where halogen-free material compliance is mandated | Select SMA5J8.5CAHE3_A/H for standard AEC-Q101 automotive programs; choose SMA5J8.5CA-M3/61 when halogen-free bill-of-materials is required |
| SMA6J8.5CAHE3_A/H | 600 W peak pulse power rating (vs. 500 W); same VWM, VBR, VC, and package | Higher surge margin for harsher environments (e.g., commercial vehicle alternator load dump); larger thermal footprint may affect layout | Use SMA5J8.5CAHE3_A/H where 500 W suffices and space is constrained; upgrade to SMA6J8.5CAHE3_A/H only if design requires >500 W headroom |
Compared with SMA5J8.5CA-M3/61, the SMA5J8.5CAHE3_A/H offers identical protection performance but uses standard RoHS-compliant plating instead of halogen-free; versus SMA6J8.5CAHE3_A/H, it trades 100 W lower peak power for tighter board space utilization and lower cost - optimal for cost-sensitive AEC-Q101 applications with validated 500 W surge requirements.
Availability
SMA5J8.5CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, AEC-Q101 traceability, and consistent 500 W surge capability.
Supply support for SMA5J8.5CAHE3_A/H 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 protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMA5J series is engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial applications, delivering AEC-Q101-qualified 500 W clamping performance in the compact SMA package.
FAQ
What does the "CA" suffix indicate in SMA5J8.5CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration - meaning the SMA5J8.5CAHE3_A/H provides symmetrical clamping in both polarities, unlike unidirectional "A" variants. This makes it suitable for AC-coupled signals, differential buses, and floating interfaces where polarity reversal may occur. The device has no cathode marking, confirming its bidirectional nature per Vishay's documentation.
Is SMA5J8.5CAHE3_A/H qualified to AEC-Q101?
Yes, SMA5J8.5CAHE3_A/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering information table and mechanical data section. The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification, and the datasheet notes "AEC-Q101 qualified" for all HE3/HM3 variants. This qualification covers temperature cycling, humidity testing, and surge endurance relevant to automotive under-hood use.
What is the clamping voltage of SMA5J8.5CAHE3_A/H at its rated peak pulse current?
The clamping voltage (VC) of SMA5J8.5CAHE3_A/H is 14.4 V at 10 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value is specified in the Electrical Characteristics table and defines the maximum voltage seen by protected circuitry during a full-rated surge event - critical for ensuring downstream components remain within safe operating limits.
Can SMA5J8.5CAHE3_A/H be used in place of a unidirectional TVS like SMA5J8.5AHE3_A/H?
No - SMA5J8.5CAHE3_A/H is bidirectional and cannot replace unidirectional types like SMA5J8.5AHE3_A/H in DC-biased circuits requiring forward conduction or polarity-specific protection. Substitution would result in unintended conduction during normal forward bias. Always verify circuit topology: use "CA" only where symmetrical clamping is required, such as AC lines or differential pairs.
What is the maximum junction temperature rating for SMA5J8.5CAHE3_A/H?
The maximum junction temperature (TJ) for SMA5J8.5CAHE3_A/H is +150 °C, as stated in the Maximum Ratings table. This rating enables reliable operation in high-temperature environments such as automotive engine compartments or industrial control cabinets. Derating curves in Figure 2 show allowable pulse power reduction above 25 °C ambient to maintain this TJ limit.
SMA5J8.5CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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 ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J8.5CAHE3_A/H FAQ
1.How can I place an order for SMA5J8.5CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5CAHE3_A/H 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 SMA5J8.5CAHE3_A/H reliable?
The price and inventory of SMA5J8.5CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMA5J8.5CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5CAHE3_A/H?
SMA5J8.5CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5CAHE3_A/H 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 SMA5J8.5CAHE3_A/H?
For technical support, including SMA5J8.5CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5CAHE3_A/H requirements.
6.How does Aetrix verify that SMA5J8.5CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5CAHE3_A/H 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 SMA5J8.5CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMA5J8.5CAHE3_A/H?
All SMA5J8.5CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5CAHE3_A/H, 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 SMA5J8.5CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMA5J8.5CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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