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Vishay General Semiconductor - Diodes Division SMAJ64CA-M3/5A
- Part No.:
- SMAJ64CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64CA-M3/5A.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,276
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Product details
Overview
SMAJ64CA-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 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, and clamps to ≤103 V at 3.9 A peak pulse current (IPPM) under 10/1000 μs waveform - protecting sensitive ICs, MOSFETs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ64CA-M3/5A datasheet, SMAJ64CA-M3/5A pinout, SMAJ64CA-M3/5A application, or SMAJ64CA-M3/5A equivalent, key selection criteria include bidirectional clamping capability, 400 W peak pulse power rating (derated to 300 W above 78 V), AEC-Q101 qualification eligibility (via HM3 suffix), low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both directions, enabling use without polarity consideration on AC-coupled or differential signal lines. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package provides thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead).
The SMAJ64CA-M3/5A delivers 400 W peak pulse power per 10/1000 μs waveform at TA = 25 °C, derating linearly above 25 °C per Fig. 2, and supports repetitive surges at 0.01 % duty cycle. It exhibits ≤1.0 μA maximum reverse leakage at VWM, and its temperature coefficient of VBR is +0.105 %/°C - critical for stable clamping across automotive temperature ranges (−55 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 64 V - maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 71.1–78.6 V at 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | ≤103 V at IPPM = 3.9 A - peak voltage seen by protected circuit during 10/1000 μs transient; determines stress on downstream components |
| PPPM (Peak Pulse Power) | 400 W (≤78 V), 300 W (>78 V) - energy-handling capacity for single non-repetitive surges; defines survivability against lightning or ESD-like pulses |
| IPPM (Peak Pulse Current) | 3.9 A - maximum surge current supported at rated clamping voltage; used to size PCB trace width and layout thermal relief |
| TJmax | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and high-power industrial enclosures |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement; supports J-STD-020 MSL Level 1 reflow |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance. Bidirectional construction has no polarity marking - terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as interchangeable surge current entry/exit points; no cathode band marking required for bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled lines (e.g., RS-485, CAN, audio) without polarity-sensitive placement or external diode pairing |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive ECUs without degradation under specified duty cycle |
| AEC-Q101 qualification option (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - supports Tier-1 BOM requirements |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices, improving system-level surge immunity margin |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile usage without baking - reduces manufacturing overhead in high-volume SMT lines |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting 0–10 V or 4–20 mA analog inputs in engine control units from load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across input terminals upstream of signal conditioning op-amps and ADC front-ends. Use Value: Limits transient excursions to ≤103 V, preventing latch-up or damage to precision amplifiers and SAR ADCs rated for <12 V absolute max input. |
Use Scenario: Safeguarding programmable logic controller (PLC) analog input modules connected to field transmitters in factory automation. IC Role / Device Role / Timing Role: Primary surge suppression element on terminal blocks, coordinated with gas discharge tubes (GDTs) for multi-stage protection. Use Value: Absorbs up to 400 W of induced surge energy (per IEC 61000-4-5 2 Ω/12 Ω coupling), maintaining signal integrity during maintenance hot-swap events. |
| Telecom Line Interface Protection | Consumer Device USB/DisplayPort ESD Protection |
|
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Secondary clamping device after primary GDT or polymer PTC, placed directly at RJ-45 connector pins. Use Value: Responds in <1 ns to clamp common-mode transients to safe levels before they reach magnetics or PHY silicon, meeting GR-1089-CORE Level 3. |
Use Scenario: Adding robust board-level ESD protection to USB 2.0 data lines and DisplayPort AUX channels in laptops and docking stations. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical at VWM) bidirectional TVS placed adjacent to connectors to shunt ±15 kV contact discharge. Use Value: Maintains signal integrity with minimal insertion loss due to low dynamic capacitance, while surviving repeated IEC 61000-4-2 Level 4 discharges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64CA-E3/5A | Same electrical specs; RoHS-compliant but not halogen-free; uses matte tin plating compliant with J-STD-002. | Preferred for commercial-grade applications where halogen-free materials are not mandated by end-equipment standards. | Select when cost sensitivity outweighs halogen-free requirements and AEC-Q101 qualification is unnecessary. |
| SMAJ64CAHM3_A/I | Identical electrical and mechanical specs; includes AEC-Q101 qualification and halogen-free molding compound; shipped in 13" tape-and-reel (7500 pcs). | Required for automotive OEM designs needing full PPAP documentation and long-term supply assurance under automotive quality systems. | Choose for automotive Tier-1 programs requiring certified reliability, extended temperature validation, and traceable lot history. |
Compared with SMAJ64CA-M3/5A, the E3/5A variant offers lower procurement cost for non-automotive use, while the HM3_A/I version adds formal automotive qualification and larger reel packaging - enabling direct substitution only when qualification and logistics alignment match program requirements.
Availability
SMAJ64CA-M3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, telecom line protection, and consumer USB/DisplayPort ESD protection requiring stable component supply across production lifecycles.
Supply support for SMAJ64CA-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMAJ series was developed to deliver high-power, low-profile transient suppression for automotive, industrial, and communications systems - balancing clamping precision, surge robustness, and manufacturability in standard SMT packages.
FAQ
What is the clamping voltage of SMAJ64CA-M3/5A at its rated peak pulse current?
The SMAJ64CA-M3/5A clamps to a maximum of 103 V at its rated peak pulse current of 3.9 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and represents the upper limit of voltage imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings. The clamping voltage is confirmed in the Electrical Characteristics table on page 2 of Vishay document 88390.
Is SMAJ64CA-M3/5A suitable for automotive applications?
SMAJ64CA-M3/5A is halogen-free and RoHS-compliant, and belongs to the AEC-Q101-qualified SMAJ family - though the specific M3/5A suffix denotes commercial-grade packaging. For automotive use, the HM3_A/I variant (e.g., SMAJ64CAHM3_A/I) must be selected to obtain full AEC-Q101 certification documentation and test reports. The SMAJ64CA-M3/5A itself may be used in non-safety-critical automotive subsystems where qualification is not mandated, but design-in requires validation per vehicle manufacturer requirements.
How does the bidirectional configuration of SMAJ64CA-M3/5A affect PCB layout?
The bidirectional configuration of SMAJ64CA-M3/5A eliminates polarity constraints during placement - no cathode band marking exists, and either terminal may connect to either side of a differential or AC-coupled line. This simplifies layout by removing orientation checks during automated placement and allows symmetric routing on balanced interfaces like RS-485 or CAN FD. Layout must still follow Vishay's recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad dimensions per terminal to maintain thermal and surge performance per datasheet Fig. 1.
What is the maximum operating temperature for SMAJ64CA-M3/5A?
The SMAJ64CA-M3/5A has a maximum junction temperature (TJmax) of +150 °C and an operating ambient temperature range of −55 °C to +150 °C. This rating enables reliable operation in under-hood automotive environments, industrial motor drives, and enclosed power supplies. Derating of peak pulse power begins above TA = 25 °C per Figure 2 in Vishay document 88390, with thermal resistance values of RθJA = 120 °C/W and RθJL = 30 °C/W guiding heatsinking decisions.
Does SMAJ64CA-M3/5A meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMAJ64CA-M3/5A meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means it can be processed using standard lead-free reflow profiles without baking or dry-pack requirements, supporting uninterrupted SMT line operation. The device's matte tin-plated leads are solderable per J-STD-002 and JESD 22-B102, and its molding compound complies with UL 94 V-0 flammability rating - all verified in the Mechanical Data section of Vishay document 88390.
SMAJ64CA-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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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)
SMAJ64CA-M3/5A FAQ
1.How can I place an order for SMAJ64CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64CA-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 SMAJ64CA-M3/5A reliable?
The price and inventory of SMAJ64CA-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 SMAJ64CA-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ64CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64CA-M3/5A?
SMAJ64CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64CA-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 SMAJ64CA-M3/5A?
For technical support, including SMAJ64CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64CA-M3/5A requirements.
6.How does Aetrix verify that SMAJ64CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ64CA-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 SMAJ64CA-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ64CA-M3/5A?
All SMAJ64CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64CA-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 SMAJ64CA-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ64CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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