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Vishay General Semiconductor - Diodes Division SMAJ64CA-E3/5A
- Part No.:
- SMAJ64CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64CA-E3/5A.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,404
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Product details
Overview
SMAJ64CA-E3/5A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, 103 V maximum clamping voltage (VC) at 3.9 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - ideal for safeguarding MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD.
For engineers reviewing the SMAJ64CA-E3/5A datasheet, SMAJ64CA-E3/5A pinout, SMAJ64CA-E3/5A application, or SMAJ64CA-E3/5A equivalent, key selection considerations include bidirectional clamping symmetry, low incremental surge resistance, AEC-Q101 qualification eligibility (via HE3/HM3 variants), UL 497B recognition, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR min/max (71.1–78.6 V), VC (103 V), and IPPM (3.9 A) specifications across reverse and forward directions. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns), enabling effective suppression of sub-microsecond transients induced by relay switching or lightning surges.
The device is rated for 150 °C maximum junction temperature, exhibits 0.105 %/°C temperature coefficient of VBR, and delivers 400 W peak pulse power up to 78 V - derating to 300 W above that threshold per Fig. 2. Thermal resistance is 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting reliable operation on 5.0 mm × 5.0 mm copper pads per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - maximum continuous reverse operating voltage before clamping begins; defines safe working margin for protected circuitry. |
| VBR (min/max) | 71.1 V / 78.6 V at IT = 1 mA - guaranteed breakdown range ensuring predictable turn-on under surge conditions. |
| VC @ IPPM | 103 V at 3.9 A - clamping voltage during 10/1000 μs transient; limits stress on downstream components. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak pulse power handling capability with standard lightning surge waveform. |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss. |
| TJ max. | +150 °C - enables use in under-hood automotive, industrial motor drives, and high-temperature ambient environments. |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation (no cathode band).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 | One side of symmetrical PN junction; connects to line or signal path requiring bidirectional surge protection. |
| Cathode | Terminal 2 | Other side of symmetrical PN junction; forms differential clamp across protected node and reference (e.g., GND or rail). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates need for polarity-aware layout in AC-coupled or floating signal paths. |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation when mounted on 5 mm × 5 mm copper pads. |
| UL 497B recognized | Qualified as telecom protector (QVGQ2, E136766) - meets safety requirements for primary-side protection in PoE, DSL, and base station interfaces. |
| MSL Level 1 | Reflow-compatible up to 260 °C peak - supports single-pass lead-free assembly without moisture sensitivity concerns. |
| AEC-Q101 option | HE3/HM3 variants available - validated for automotive powertrain and body electronics per stress test requirements. |
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 alternator ripple in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal line and chassis ground to limit transient excursions to <103 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and precision ADCs during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoids, contactors, and motor starters. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing >400 W surge energy within nanoseconds to hold input voltage below controller's absolute maximum rating. Use Value: Enables reliable operation without external snubbers or varistors, reducing BOM count and board space in DIN-rail mounted control cabinets. |
| Telecom Line Interface | Consumer Power Adapter Protection |
|
Use Scenario: Secondary-side surge protection on Ethernet PHY interfaces, DSL line drivers, and PoE-powered equipment per IEC 61000-4-5. IC Role / Device Role / Timing Role: Differential-mode clamp between tip/ring or data pair lines, referenced to local ground plane. Use Value: Maintains signal integrity up to 100 MHz while meeting UL 497B Class B isolation and surge withstand requirements. |
Use Scenario: Input-stage protection in AC-DC adapters and USB-C PD chargers subjected to mains-borne surges and ESD events. IC Role / Device Role / Timing Role: Clamp across primary-side bulk capacitor or secondary-side DC output rails to prevent overvoltage propagation to downstream regulators. Use Value: Achieves >100,000 surge cycles endurance with no parameter drift, supporting 10-year consumer product lifetimes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-E3/5A | Unidirectional variant with cathode marking; same VWM, VBR, VC, and PPPM ratings. | Requires polarity-aware PCB layout; suitable only where DC bias direction is fixed (e.g., DC power rail protection). | Select SMAJ64A-E3/5A only if protecting unidirectional signals or rails with known polarity; SMAJ64CA-E3/5A avoids orientation errors in AC or floating nodes. |
| SMBJ64CA-T | Higher 600 W PPPM rating in SMB (DO-214AA) package; 10% larger footprint; identical VWM/VBR/VC specs. | Better thermal performance due to lower RθJA (80 °C/W); preferred for high-repetition-rate surge environments. | Choose SMBJ64CA-T when system-level testing reveals marginal clamping margin or repeated surge exposure exceeds 400 W duty cycle limits. |
Compared with SMAJ64A-E3/5A, SMAJ64CA-E3/5A eliminates polarity dependency in layout and simplifies inventory; versus SMBJ64CA-T, it trades 50% lower peak power for 25% smaller board area and full MSL Level 1 compatibility - making it optimal for space-constrained, cost-sensitive, and high-volume SMT designs.
Availability
SMAJ64CA-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line cards, and consumer power adapter designs requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for SMAJ64CA-E3/5A 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, power efficiency, and AEC-Q qualification.
The SMAJ series was developed for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping performance across temperature, lifetime, and manufacturing lots.
FAQ
What is the clamping voltage of SMAJ64CA-E3/5A at its rated peak pulse current?
The SMAJ64CA-E3/5A has a maximum clamping voltage (VC) of 103 V at its specified peak pulse current (IPPM) of 3.9 A, measured using the standardized 10/1000 μs double-exponential surge waveform. This value ensures protected circuits remain within safe operating limits during transient events, and is verified per ANSI/IEEE C62.35 test conditions with the device mounted on 5.0 mm × 5.0 mm copper pads.
Is SMAJ64CA-E3/5A suitable for automotive applications?
SMAJ64CA-E3/5A itself is commercial-grade (RoHS-compliant, MSL Level 1), but Vishay offers AEC-Q101 qualified versions under ordering codes SMAJ64CAHE3_X and SMAJ64CAHM3_X. For automotive use, specify those variants - they undergo stress testing per AEC-Q101 including HTOL, TCT, and ESD - while maintaining identical electrical specs to SMAJ64CA-E3/5A.
How does the bidirectional design of SMAJ64CA-E3/5A affect PCB layout?
The SMAJ64CA-E3/5A has no polarity marking and functions identically in both directions, so PCB layout requires no orientation alignment - unlike unidirectional types such as SMAJ64A-E3/5A. This eliminates risk of misplacement during automated assembly and simplifies routing for AC-coupled, differential, or floating signal lines where voltage polarity reverses.
What is the maximum operating temperature for SMAJ64CA-E3/5A?
The SMAJ64CA-E3/5A has a maximum junction temperature (TJ max.) of +150 °C and an operating junction/storage temperature range of –55 °C to +150 °C. Its thermal resistance is 120 °C/W (junction-to-ambient) when mounted per recommended pad layout, allowing reliable operation in under-hood automotive, industrial motor control, and outdoor telecom enclosures.
Does SMAJ64CA-E3/5A meet any safety certifications?
Yes - SMAJ64CA-E3/5A is Underwriters Laboratories (UL) recognized under standard UL 497B for protectors, with file number E136766. This certification covers both unidirectional and bidirectional variants and validates suitability for telecom, data line, and low-voltage power interface protection in safety-critical end equipment.
SMAJ64CA-E3/5A 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-E3/5A FAQ
1.How can I place an order for SMAJ64CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64CA-E3/5A 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-E3/5A reliable?
The price and inventory of SMAJ64CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ64CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ64CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64CA-E3/5A?
SMAJ64CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64CA-E3/5A 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-E3/5A?
For technical support, including SMAJ64CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64CA-E3/5A requirements.
6.How does Aetrix verify that SMAJ64CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ64CA-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ64CA-E3/5A?
All SMAJ64CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64CA-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ64CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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