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Vishay General Semiconductor - Diodes Division SMA5J8.5CAHE3/5A
- Part No.:
- SMA5J8.5CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5CAHE3/5A.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,357
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Product details
Overview
SMA5J8.5CAHE3/5A 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 - used to protect automotive sensor interfaces, industrial I/O ports, and telecom line drivers against ESD and lightning-induced transients.
For engineers reviewing the SMA5J8.5CAHE3/5A datasheet, SMA5J8.5CAHE3/5A pinout, SMA5J8.5CAHE3/5A application, or SMA5J8.5CAHE3/5A equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification, 150 °C junction temperature rating, 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 crowbar during transient events, leveraging an avalanche breakdown mechanism to shunt surge energy away from downstream circuitry. Its bidirectional symmetry ensures identical clamping behavior in both polarities, with guaranteed VBR min/max spread of 9.44 V to 10.4 V at 1 mA test current and ≤1.0 μA reverse leakage at VWM.
Thermally, it exhibits RθJA = 80 °C/W and RθJL = 25 °C/W, enabling reliable operation up to TJ = 150 °C when mounted per recommended pad layout. The glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - defines precise avalanche onset window for predictable protection threshold |
| VC @ IPPM | 14.4 V at 10 A (10/1000 μs) - limits voltage seen by protected IC during worst-case surge |
| PPPM | 500 W - peak transient power handling capacity under standardized surge waveform |
| TJ max | 150 °C - enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with standard reflow profiles and automated pick-and-place |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Two-terminal bidirectional device in SMA (DO-214AC) package; no polarity marking. Terminals are matte tin-plated leads suitable for J-STD-002-compliant soldering. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay thermal derating guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output; clamps transients regardless of polarity direction |
| Case (SMA body) | Thermal conduction path | Non-electrical; provides mechanical mounting and contributes to junction-to-ambient thermal resistance (RθJA = 80 °C/W) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VWM = 1.69) | Minimizes overvoltage stress on protected components during surge events |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow assembly without moisture-related popcorning or delamination |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to divert surge energy before reaching interface IC. Use Value: Clamps 500 W surges to ≤14.4 V while maintaining <1.0 μA leakage at 8.5 V, preserving signal integrity and preventing latch-up in protected transceivers. | Use Scenario: Safeguarding PLC digital input modules and analog front-ends against field-wiring induced transients in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional transient suppressor installed across input terminals to absorb inductive kickback from solenoids and relays. Use Value: Symmetrical clamping ensures protection regardless of wiring polarity; 150 °C rating supports operation in enclosed control cabinets with elevated ambient temperatures. |
| Telecom Line Driver Protection | Consumer USB/Display Interface Protection |
Use Scenario: Shielding RS-485/RS-422 transceivers in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge suppression element placed between connector and transceiver, sized to handle 10/1000 μs threat waveforms. Use Value: 500 W PPPM rating and 14.4 V clamping enable compliance with ITU-T K.20 and IEC 61000-4-5 Level 4 immunity requirements. | Use Scenario: ESD and surge protection for HDMI, USB 2.0, or MIPI D-PHY lanes in smart displays and set-top boxes. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) placed inline with high-speed data lines to suppress ±8 kV contact ESD per IEC 61000-4-2. Use Value: Bidirectional operation protects differential pairs without DC bias disruption; RoHS-compliant HE3 suffix meets consumer electronics environmental mandates. |
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-E3/5A | Commercial-grade version; lacks AEC-Q101 qualification and automotive traceability | Suitable for non-automotive industrial or consumer designs where automotive reliability is not mandated | Select when cost sensitivity outweighs need for automotive qualification and lifecycle assurance |
| SMA6J8.5CAHE3/5A | 600 W peak pulse power rating; otherwise identical VWM, VBR, and package | Preferred for higher-energy threat environments (e.g., 12 V battery rail protection in commercial vehicles) | Choose when system-level surge testing exceeds 500 W capability or requires margin above IEC 61000-4-5 Level 4 |
Compared with SMA5J8.5CAHE3/5A, the E3/5A variant trades automotive qualification for lower cost in non-automotive settings, while the SMA6J8.5CAHE3/5A offers +20 % surge power headroom in the same footprint - enabling design reuse with enhanced robustness where PCB space is constrained.
Availability
SMA5J8.5CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial programmable logic controllers, and telecom line driver circuits requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMA5J8.5CAHE3/5A 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 high-reliability, high-power-density solutions.
The SMA5J series is engineered specifically for high-energy transient suppression in space-constrained, thermally demanding applications - targeting automotive, industrial, and telecom infrastructure where robustness and AEC-Q101 validation are mandatory.
FAQ
What does the "HE3" suffix indicate in SMA5J8.5CAHE3/5A?
The "HE3" suffix denotes that the SMA5J8.5CAHE3/5A is RoHS-compliant and AEC-Q101 qualified, with halogen-free molding compound and traceability for automotive applications. It also specifies compliance with JESD201 Class 2 whisker resistance and MSL Level 1 reflow profile (260 °C peak). This distinguishes it from commercial-grade variants like SMA5J8.5CA-E3/5A.
Is SMA5J8.5CAHE3/5A unidirectional or bidirectional?
SMA5J8.5CAHE3/5A is a bidirectional transient voltage suppressor, as confirmed by the "CA" suffix in its part number. Its electrical characteristics - including breakdown voltage, clamping voltage, and leakage current - apply identically in both directions, making it suitable for protecting AC-coupled or floating signal paths without polarity constraints.
What is the maximum clamping voltage of SMA5J8.5CAHE3/5A and at what current is it specified?
The maximum clamping voltage (VC) of SMA5J8.5CAHE3/5A is 14.4 V, measured at a peak pulse current (IPPM) of 10 A using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SMA5J8.5CAHE3/5A be used in place of a unidirectional TVS like SMA5J8.5AHE3/5A?
No - SMA5J8.5CAHE3/5A is bidirectional and cannot replace a unidirectional device like SMA5J8.5AHE3/5A in DC-biased applications requiring forward conduction or polarity-specific clamping. Unidirectional types have a defined cathode band and conduct forward current (IFSM = 40 A); SMA5J8.5CAHE3/5A has no polarity marking and blocks in both directions until breakdown.
What PCB pad layout is recommended for optimal thermal performance of SMA5J8.5CAHE3/5A?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of SMA5J8.5CAHE3/5A to achieve rated thermal resistance (RθJA = 80 °C/W). Smaller pads increase junction temperature and reduce surge current capability; the SMA (DO-214AC) outline drawing confirms 0.074" (1.88 mm) max terminal width and 0.208" (5.28 mm) max body length.
SMA5J8.5CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMA5J8.5CAHE3/5A FAQ
1.How can I place an order for SMA5J8.5CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5CAHE3/5A 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 SMA5J8.5CAHE3/5A reliable?
The price and inventory of SMA5J8.5CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J8.5CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5CAHE3/5A?
SMA5J8.5CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5CAHE3/5A 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 SMA5J8.5CAHE3/5A?
For technical support, including SMA5J8.5CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5CAHE3/5A requirements.
6.How does Aetrix verify that SMA5J8.5CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5CAHE3/5A 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 SMA5J8.5CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J8.5CAHE3/5A?
All SMA5J8.5CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5CAHE3/5A, 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 SMA5J8.5CAHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J8.5CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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