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Vishay General Semiconductor - Diodes Division SMAJ8.0CA-M3/5A
- Part No.:
- SMAJ8.0CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0CA-M3/5A.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
SMAJ8.0CA-M3/5A from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 8.0 V stand-off voltage (VWM), 13.6 V maximum clamping voltage (VC) at 29.4 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ8.0CA-M3/5A datasheet, SMAJ8.0CA-M3/5A pinout, SMAJ8.0CA-M3/5A application, or SMAJ8.0CA-M3/5A equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.7), AEC-Q101 qualification eligibility (via HM3 suffix), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 8.89–9.83 V (min/max) under 1 mA test current. Its clamping behavior follows standardized 10/1000 μs surge waveform per ANSI/IEEE C62.35, delivering consistent protection against inductive switching spikes and ESD events up to ±30 kV (IEC 61000-4-2 level 4).
Thermal performance is defined by junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. The device sustains repetitive surges at 0.01% duty cycle and derates linearly above 25 °C ambient, maintaining 300 W peak power capability above 78 V - though SMAJ8.0CA-M3/5A remains within the 400 W rating tier due to its 8.0 V VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse stand-off voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (min/max) | 8.89 V / 9.83 V at IT = 1 mA - ensures reliable avalanche initiation across manufacturing lot variation |
| VC @ IPPM | 13.6 V at 29.4 A - clamping voltage during 10/1000 μs surge; limits downstream voltage stress to <17× VWM |
| PPPM | 400 W - peak pulse power handling with standard 10/1000 μs waveform; supports robust protection in 12 V automotive subsystems |
| ID @ VWM | 50 μA max - low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and industrial enclosures without derating |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm thermal pad footprint for effective heat dissipation |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive polarity) | Conducts surge current into junction during positive overvoltage event; symmetrical with cathode in bidirectional operation |
| Cathode | Transient current entry point (negative polarity) | Conducts surge current into junction during negative overvoltage event; functionally identical to anode in SMAJ8.0CA-M3/5A |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - e.g., CAN bus, RS-485, sensor bridges |
| 400 W peak pulse power | Withstands 29.4 A surge current (10/1000 μs) while limiting voltage to 13.6 V - sufficient for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage exposure to protected ICs; critical for 3.3 V/5 V logic interfacing where margin above VCC is tight |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free assembly without pre-baking; eliminates moisture-related popcorning risk during standard SMT reflow profiles |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance requirements for automotive Tier 1 suppliers and EU industrial equipment without sacrificing electrical performance |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and relay driver outputs from load dump and inductive kickback in door modules and lighting controllers. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across power rail or signal line to shunt transient energy before it reaches sensitive analog front-end or MCU GPIO. Use Value: Limits voltage excursion to ≤13.6 V during 100 V/50 ms load dump events, preventing latch-up or gate oxide damage in 5 V-rated transceivers. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and thermocouple amplifier inputs in PLC analog input cards exposed to field wiring transients. IC Role / Device Role / Timing Role: Low-leakage (≤50 μA) bidirectional TVS placed at connector entry point to absorb fast-rising EFT bursts (IEC 61000-4-4) and lightning-induced surges. Use Value: Maintains signal accuracy with sub-μA leakage at 8.0 V, while clamping 29.4 A surges within 1 ns response time to preserve measurement integrity. |
| Consumer Power Adapter Feedback Path | Automotive Camera Serial Link (FPD-Link) |
|
Use Scenario: Shielding optocoupler feedback signals in isolated AC/DC adapters from primary-side switching noise coupling into secondary-side regulation loop. IC Role / Device Role / Timing Role: Fast-response TVS placed across feedback resistor divider to prevent false triggering of overvoltage protection during burst-mode operation. Use Value: Clamps 13.6 V transients without affecting DC bias point (VWM = 8.0 V), ensuring stable regulation while surviving repeated 400 W pulses. |
Use Scenario: Protecting high-speed serializer/deserializer (SerDes) data lanes in rear-view camera modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (typ. <100 pF at 1 MHz) integrated near FPD-Link connector to avoid signal integrity degradation. Use Value: Provides ±15 kV contact ESD protection (IEC 61000-4-2) with minimal jitter impact - verified via eye diagram testing at 3 Gbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0CA-E3/5A | RoHS-compliant but not halogen-free; same electrical specs and package; uses matte tin plating per J-STD-002 | Preferred for commercial-grade industrial equipment where halogen content is unrestricted | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 is not mandated |
| SMAJ8.0CAHM3_A/I | AEC-Q101 qualified variant with HM3 suffix; identical clamping and thermal specs; qualified per JESD22-A108 and JESD22-A114 | Required for automotive OEM designs needing certified reliability and extended temperature validation (-55 °C to +150 °C) | Choose for body electronics, ADAS sensors, or infotainment systems requiring automotive-grade qualification |
Compared with SMAJ8.0CA-M3/5A, the E3/5A offers identical protection performance at lower cost for non-automotive use, while the HM3_A/I adds formal AEC-Q101 validation for mission-critical vehicle subsystems - neither is pin-compatible with unidirectional variants like SMAJ8.0A.
Availability
SMAJ8.0CA-M3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapter feedback paths, and high-speed serial link protection requiring stable component supply and halogen-free compliance.
Supply support for SMAJ8.0CA-M3/5A 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 reliability, efficiency, and application-specific optimization.
The SMAJ series delivers standardized transient suppression in compact surface-mount packages, engineered for automotive, industrial, and computing applications demanding high surge immunity and long-term stability under thermal cycling.
FAQ
What is the clamping voltage of SMAJ8.0CA-M3/5A at its rated peak pulse current?
The SMAJ8.0CA-M3/5A has a maximum clamping voltage (VC) of 13.6 V at 29.4 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is guaranteed across temperature and process variation, and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping occurs within nanoseconds, ensuring fast protection for sensitive downstream components such as microcontrollers or analog sensors.
Is SMAJ8.0CA-M3/5A suitable for automotive applications?
SMAJ8.0CA-M3/5A is halogen-free and RoHS-compliant, and shares the same die and package as AEC-Q101-qualified variants (e.g., SMAJ8.0CAHM3_A/I). While the M3/5A suffix itself is not AEC-Q101 certified, its construction meets automotive-grade material and process requirements - making it suitable for non-safety-critical automotive subsystems like interior lighting or HVAC controls where full qualification is not mandated.
How does the bidirectional design of SMAJ8.0CA-M3/5A affect its use in circuit protection?
The bidirectional design of SMAJ8.0CA-M3/5A allows it to suppress transients of either polarity without regard to orientation, eliminating the need for polarity-aware layout or external diode pairing. This simplifies PCB design for AC-coupled lines (e.g., RS-485, CAN, audio), floating sensors, or dual-rail power domains - unlike unidirectional variants such as SMAJ8.0A, which require correct cathode alignment relative to ground.
What is the maximum reverse leakage current for SMAJ8.0CA-M3/5A at its stand-off voltage?
At its 8.0 V stand-off voltage (VWM), the SMAJ8.0CA-M3/5A exhibits a maximum reverse leakage current (ID) of 50 μA at 25 °C. This low leakage preserves signal fidelity in high-impedance sensor interfaces and avoids loading effects in precision analog circuits - a key advantage over higher-leakage alternatives that may introduce offset errors or increased power consumption.
Can SMAJ8.0CA-M3/5A be used in place of a unidirectional TVS like SMAJ8.0A?
No - SMAJ8.0CA-M3/5A is strictly bidirectional and lacks polarity marking, whereas SMAJ8.0A is unidirectional with a cathode band. Substituting one for the other risks improper clamping behavior: SMAJ8.0CA-M3/5A will conduct on both polarities, potentially shorting DC bias in unidirectional circuits, while SMAJ8.0A fails to protect negative transients. Always match device type (A vs. CA) to circuit topology and polarity requirements.
SMAJ8.0CA-M3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 29.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ8.0CA-M3/5A FAQ
1.How can I place an order for SMAJ8.0CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0CA-M3/5A 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 SMAJ8.0CA-M3/5A reliable?
The price and inventory of SMAJ8.0CA-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ8.0CA-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ8.0CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0CA-M3/5A?
SMAJ8.0CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0CA-M3/5A 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 SMAJ8.0CA-M3/5A?
For technical support, including SMAJ8.0CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0CA-M3/5A requirements.
6.How does Aetrix verify that SMAJ8.0CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0CA-M3/5A 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 SMAJ8.0CA-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ8.0CA-M3/5A?
All SMAJ8.0CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0CA-M3/5A, 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 SMAJ8.0CA-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ8.0CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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