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Vishay General Semiconductor - Diodes Division SMA5J8.5CAHE3_A/I
- Part No.:
- SMA5J8.5CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5CAHE3_A/I.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,024
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Product details
Overview
SMA5J8.5CAHE3_A/I 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 safeguard automotive sensor interfaces and industrial I/O circuits against ESD and lightning-induced transients.
For engineers reviewing the SMA5J8.5CAHE3_A/I datasheet, SMA5J8.5CAHE3_A/I pinout, SMA5J8.5CAHE3_A/I application, or SMA5J8.5CAHE3_A/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transient events, conducting when reverse voltage exceeds VBR and limiting downstream voltage to ≤14.4 V at 10 A (10/1000 μs waveform). Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns).
Designed for bidirectional protection, SMA5J8.5CAHE3_A/I has no polarity marking and delivers symmetrical electrical characteristics in both directions. It meets MSL Level 1 per J-STD-020, supports 260 °C reflow peak, and is qualified to AEC-Q101 for automotive under-hood and body electronics 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 - guaranteed breakdown threshold defining turn-on precision |
| VC @ IPPM | 14.4 V at 10 A (10/1000 μs) - peak clamped voltage protecting downstream ICs from overvoltage |
| PPPM | 500 W - surge energy handling capacity under standardized transient waveform |
| ID @ VWM | ≤1.0 μA - ultra-low leakage ensuring minimal standby power loss in battery-powered systems |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| RθJA | 80 °C/W - thermal resistance indicating need for adequate PCB copper area for sustained surge duty |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional, unmarked case (no cathode band). Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), matte tin-plated leads, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Bidirectional terminals - interchangeable; no polarity marking required for layout or assembly |
| Case (body) | Thermal and mechanical interface | Non-electrical; requires minimum 0.2" × 0.2" copper pad per terminal for thermal dissipation and surge current handling |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift across 150 °C operating range |
| MSL Level 1 rating | Enables single-reflow assembly without moisture sensitivity concerns or baking requirements |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V and 5 V logic |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation meeting safety standards for industrial and automotive end equipment |
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: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before it reaches signal conditioning circuitry. Use Value: Clamps transients to ≤14.4 V while maintaining <1.0 μA leakage at 8.5 V, preserving signal integrity and enabling direct interface with 12 V supply-referenced sensors. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role / Timing Role: Parallel-connected TVS on each 24 V DC input line to absorb repetitive 500 W surges without degradation. Use Value: Withstands ≥1000 surges at rated PPPM, maintains stable VBR over lifetime, and supports automated placement on high-density I/O carrier boards. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in base station remote units from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired bidirectional TVS on differential pairs to enforce symmetrical clamping and minimize skew during transient events. Use Value: Matches impedance of high-speed lines due to low junction capacitance (~200 pF at 0 V), preventing signal distortion up to 10 Mbps. | Use Scenario: Protecting microcontroller GPIOs and gate drivers in smart washing machine control boards from motor commutation spikes. IC Role / Device Role / Timing Role: Localized TVS on motor driver enable lines and feedback sensing paths to prevent latch-up and false triggering. Use Value: AEC-Q101 qualification ensures robustness against vibration, thermal cycling, and humidity - critical for white goods field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5CAHM3_A/I | Halogen-free variant; identical electrical specs, same AEC-Q101 qualification and package | No functional difference; selected where halogen-free compliance is mandated by OEM or regional regulation | Direct material substitution if halogen-free requirement applies; no design or layout change needed |
| SMCJ8.5CAHE3_A/I | Same VWM/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating | Used where higher surge energy (e.g., ISO 16750-2 Pulse 5a) must be absorbed without derating | Select when system-level surge test requirements exceed 500 W; requires PCB footprint revision |
Compared with SMA5J8.5CAHE3_A/I, SMA5J8.5CAHM3_A/I offers identical protection performance with halogen-free construction, while SMCJ8.5CAHE3_A/I provides triple the surge power rating in a physically larger package - choice depends strictly on board space constraints and certified surge test profiles.
Availability
SMA5J8.5CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and AEC-Q101 assurance.
Supply support for SMA5J8.5CAHE3_A/I 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, power density, and automotive qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained SMT applications, targeting automotive, industrial, and telecom systems needing robust, AEC-Q101-compliant TVS solutions.
FAQ
What is the clamping voltage of the SMA5J8.5CAHE3_A/I under standard test conditions?
The SMA5J8.5CAHE3_A/I has a maximum clamping voltage (VC) of 14.4 V when subjected to a 10 A peak pulse current with a 10/1000 μs waveform. This value is measured at TA = 25 °C on specified copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J8.5CAHE3_A/I maintains this clamping performance consistently across its operational temperature range.
Is the SMA5J8.5CAHE3_A/I suitable for automotive applications?
Yes, the SMA5J8.5CAHE3_A/I is AEC-Q101 qualified and explicitly intended for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity rating, and operation up to +150 °C junction temperature - all validated per automotive stress test requirements. The SMA5J8.5CAHE3_A/I is commonly deployed in body control modules, sensor front-ends, and infotainment power rails.
Does the SMA5J8.5CAHE3_A/I have polarity markings?
No, the SMA5J8.5CAHE3_A/I is a bidirectional TVS diode and carries no polarity marking on the SMA (DO-214AC) package. Its electrical characteristics are symmetrical in both directions, meaning either terminal may serve as anode or cathode depending on instantaneous voltage polarity. This eliminates orientation concerns during automated placement and simplifies PCB layout.
What is the maximum leakage current of the SMA5J8.5CAHE3_A/I at its stand-off voltage?
The SMA5J8.5CAHE3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 μA when biased at its 8.5 V stand-off voltage (VWM) and tested at TA = 25 °C. This ultra-low leakage ensures minimal power drain in always-on circuits and preserves accuracy in high-impedance sensor signal paths. Leakage remains within specification across the full -55 °C to +150 °C operating range.
Can the SMA5J8.5CAHE3_A/I be used in place of a unidirectional TVS like SMA5J8.5AHE3_A/I?
No - the SMA5J8.5CAHE3_A/I is bidirectional and not functionally interchangeable with unidirectional variants such as SMA5J8.5AHE3_A/I. While both share VWM and VC values, the unidirectional part conducts only in reverse bias and requires correct polarity placement. Substituting SMA5J8.5CAHE3_A/I for SMA5J8.5AHE3_A/I in a DC-biased line may cause unintended forward conduction. Always verify circuit topology before replacement.
SMA5J8.5CAHE3_A/I 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/I FAQ
1.How can I place an order for SMA5J8.5CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5CAHE3_A/I 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/I reliable?
The price and inventory of SMA5J8.5CAHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMA5J8.5CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5CAHE3_A/I?
SMA5J8.5CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5CAHE3_A/I 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/I?
For technical support, including SMA5J8.5CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5CAHE3_A/I requirements.
6.How does Aetrix verify that SMA5J8.5CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5CAHE3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SMA5J8.5CAHE3_A/I?
All SMA5J8.5CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5CAHE3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SMA5J8.5CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J8.5CAHE3_A/I Tags
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