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Vishay General Semiconductor - Diodes Division SMAJ64AHE3_A/H
- Part No.:
- SMAJ64AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64AHE3_A/H.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ64AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 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, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMAJ64AHE3_A/H datasheet, SMAJ64AHE3_A/H pinout, SMAJ64AHE3_A/H application, or SMAJ64AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ps), while the SMA package supports high thermal dissipation via low RθJL (30 °C/W) and meets MSL level 1 reflow requirements (peak 260 °C).
The device is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), exhibits +0.105 %/°C temperature coefficient of VBR, and maintains ≤1.0 μA reverse leakage at 64 V (VWM). It is specifically qualified per AEC-Q101 for automotive under-hood and chassis applications requiring robust transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 71.1 V / 78.6 V at 1 mA - defines reliable avalanche initiation window for design margining |
| VC @ IPPM | 103 V at 3.9 A - clamped voltage seen by protected IC during 10/1000 μs surge event |
| PPPM | 400 W - peak pulse power handling capability with standard 10/1000 μs waveform |
| IFSM | 40 A - surge current tolerance for 8.3 ms half-sine wave, critical for load-dump immunity |
| TJ max | +150 °C - enables operation in under-hood automotive environments without derating |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on standard PCB layout |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, matte tin-plated leads, cathode indicated by band. Compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or lower-potential node in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal / high-side input | Connected to protected line; conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable VBR tolerance and low long-term drift under thermal cycling and humidity stress |
| 400 W peak pulse power (10/1000 μs) | Provides robust immunity against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns or baking requirements |
| Low profile SMA package | 0.208" × 0.157" footprint supports high-density PCB layouts and automated pick-and-place |
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 ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and ground to limit transient voltage before it reaches the transceiver input stage. Use Value: Clamps 103 V at 3.9 A, ensuring protected ICs see sub-110 V stress during 400 W surges - meeting ISO 16750-2 and ISO 7637-2 requirements. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Standoff-rated TVS on 24 V DC input lines, conducting only during >64 V transients to prevent latch-up or damage to optocoupler drivers. Use Value: 64 V VWM allows full system operating range while 103 V VC prevents downstream component overstress during 1 kV/500 A surge events. |
| Consumer Power Adapter Protection | Telecom Line Interface Protection |
|
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters and USB PD chargers subjected to lightning-induced surges on DC output rails. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS across +VOUT and GND to clamp flyback transformer ringing and external surge coupling. Use Value: 71.1–78.6 V VBR window provides precise coordination with 65 V-rated secondary-side MOSFETs and controllers. |
Use Scenario: Primary protection for Ethernet PHY interface power pins (e.g., 3.3 V, 5 V bias rails) in PoE-powered switches and routers. IC Role / Device Role / Timing Role: Standoff-rated TVS on supply rail to absorb induced surges from cable coupling without affecting normal 64 V rail operation. Use Value: 1.0 μA max leakage at 64 V ensures no impact on rail stability or quiescent current in always-on telecom systems. |
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-E3/61 | Same electrical specs and SMA package; RoHS-compliant commercial grade, not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial designs without automotive certification requirements | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMAJ64AHM3_A/H | Identical AEC-Q101 qualification and electrical parameters; halogen-free construction per JEDEC J-STD-020 | Required where halogen-free compliance is mandated (e.g., EU public infrastructure, green procurement policies) | Select when halogen-free material content is specified in BOM or regulatory compliance documentation |
Compared with SMAJ64AHE3_A/H, SMAJ64A-E3/61 offers identical clamping performance but lacks automotive qualification, while SMAJ64AHM3_A/H adds halogen-free compliance without altering electrical behavior - enabling precise alignment with environmental and automotive program requirements.
Availability
SMAJ64AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power interface designs requiring stable component supply with AEC-Q101 assurance and traceable sourcing.
Supply support for SMAJ64AHE3_A/H 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 power MOSFETs with emphasis on reliability and automotive-grade validation.
The SMAJ series was developed to deliver high-power, low-leakage transient suppression in compact surface-mount packages for automotive, industrial, and communications equipment demanding AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of SMAJ64AHE3_A/H at its rated peak pulse current?
The SMAJ64AHE3_A/H has a maximum clamping voltage (VC) of 103 V at its rated peak pulse current of 3.9 A, measured using the standard 10/1000 μs waveform. This value defines the highest voltage the protected circuit will experience during a surge event, making it critical for ensuring downstream ICs remain within their absolute maximum ratings. The 103 V clamping level is guaranteed across temperature and lifetime per Vishay's AEC-Q101 qualification testing.
Is SMAJ64AHE3_A/H suitable for automotive applications?
Yes, SMAJ64AHE3_A/H is explicitly AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation. It is designed for automotive use cases including engine control units, body control modules, and ADAS sensor interfaces where robustness against load dump, jump start, and ESD is mandatory. Its 150 °C maximum junction temperature and MSL Level 1 reflow rating further support under-hood deployment.
What does the "HE3" suffix in SMAJ64AHE3_A/H indicate?
The "HE3" suffix in SMAJ64AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification. "H" indicates the packaging variant (7" tape and reel), "E3" specifies the RoHS-compliant commercial grade, and the "HE3" combination confirms full automotive qualification per AEC-Q101. This distinguishes it from non-automotive variants like SMAJ64A-E3/61 and halogen-free alternatives such as SMAJ64AHM3_A/H.
How does the thermal resistance of SMAJ64AHE3_A/H affect PCB layout?
SMAJ64AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). To maintain safe operation at full 400 W pulse power, designers must ensure adequate copper area and avoid excessive trace length or isolation. Its lower junction-to-lead resistance (RθJL = 30 °C/W) means thermal performance improves significantly with direct thermal vias to inner ground planes.
What is the reverse leakage current specification for SMAJ64AHE3_A/H at its stand-off voltage?
At its 64 V stand-off voltage (VWM), SMAJ64AHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, per Vishay's Electrical Characteristics table. This ultra-low leakage ensures minimal power loss and no interference with sensitive analog or low-power digital circuits - especially important in battery-operated automotive sensors and always-on telecom interfaces where quiescent current budgets are tight.
SMAJ64AHE3_A/H 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:
- 1
- Bidirectional Channels:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ64AHE3_A/H FAQ
1.How can I place an order for SMAJ64AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64AHE3_A/H 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 SMAJ64AHE3_A/H reliable?
The price and inventory of SMAJ64AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ64AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ64AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64AHE3_A/H?
SMAJ64AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64AHE3_A/H 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 SMAJ64AHE3_A/H?
For technical support, including SMAJ64AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ64AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ64AHE3_A/H 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 SMAJ64AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ64AHE3_A/H?
All SMAJ64AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64AHE3_A/H, 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 SMAJ64AHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ64AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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