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Vishay General Semiconductor - Diodes Division SMAJ64CAHE3_A/I
- Part No.:
- SMAJ64CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64CAHE3_A/I.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,754
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Product details
Overview
SMAJ64CAHE3_A/I 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, 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 - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ64CAHE3_A/I datasheet, SMAJ64CAHE3_A/I pinout, SMAJ64CAHE3_A/I application, or SMAJ64CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, 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 breakdown in both directions, enabling robust transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and fast response (<1 ns), while the SMA package supports high thermal dissipation via 0.2" × 0.2" copper pads per terminal.
The SMAJ64CAHE3_A/I delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 71.1 V / 78.6 V at 1 mA - defines guaranteed avalanche conduction onset window |
| VC @ IPPM | 103 V at 3.9 A - clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak transient energy absorption capacity |
| ID @ VWM | 1.0 μA - ultra-low leakage ensures minimal standby power loss in protected circuits |
| TJ max. | +150 °C - enables operation in under-hood automotive and industrial ambient environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with matte tin leads |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with glass-passivated chip junction; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102; bidirectional type has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Transient conduction path | Both terminals function identically - bidirectional clamping allows placement without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 surge events up to 4 kV (line-to-earth) in properly designed layouts |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio suppressors |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without preconditioning |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive enclosures |
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: Bidirectional voltage clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient voltage to ≤103 V during 3.9 A surges, preserving signal integrity and preventing latch-up in 5 V/12 V sensor front-ends. |
Use Scenario: Shielding digital input modules in programmable logic controllers from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input rails to absorb repetitive 10/1000 μs transients from field wiring. Use Value: Maintains system uptime by preventing false triggering or damage to optocouplers and microcontrollers during factory floor switching noise events. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side control ICs and rectifier bridges against lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Secondary-stage clamping device after MOVs, handling residual fast-rising transients missed by bulk suppressors. Use Value: Provides sub-100 ns response to complement slower MOVs, reducing peak stress on bridge rectifiers and PWM controllers. |
Use Scenario: Protecting Ethernet PHYs and DSL line drivers from induced surges on twisted-pair telecom lines exposed to outdoor environments. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pairs (e.g., TX+/TX−) to clamp common-mode transients. Use Value: Enables compliance with ITU-T K.21 basic protection level (4 kV) without adding series impedance or signal distortion. |
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-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification | No difference in circuit performance or layout - differs only in material composition and tape/reel packaging | Select when halogen-free compliance is mandated by end-equipment environmental policy |
| SMBJ64CAHE3_A/I | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; 600 W PPPM rating | Higher power handling enables longer surge duration immunity; requires larger PCB footprint | Choose for designs needing >400 W surge margin or where thermal budget exceeds SMA limits |
Compared with SMAJ64CAHE3_A/I, the SMAJ64CA-M3/5A offers identical protection performance with halogen-free construction, while SMBJ64CAHE3_A/I provides +50 % peak power headroom at the cost of increased board area - both require no schematic changes but differ in layout and compliance scope.
Availability
SMAJ64CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, consumer power adapters, and telecom line interfaces requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMAJ64CAHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMAJ series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and consumer electronics - engineered for automated assembly, thermal robustness, and consistent clamping performance across temperature.
FAQ
What is the clamping voltage of SMAJ64CAHE3_A/I at its rated peak pulse current?
The SMAJ64CAHE3_A/I has a maximum clamping voltage (VC) of 103 V at its specified peak pulse current (IPPM) of 3.9 A, measured under the standardized 10/1000 μs waveform. This value ensures predictable overvoltage limiting during surge events and is verified per ANSI/IEEE C62.35. The SMAJ64CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMAJ64CAHE3_A/I suitable for automotive applications?
Yes, SMAJ64CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It undergoes rigorous stress testing including temperature cycling, humidity bias, and mechanical shock per AEC standards. Its 150 °C maximum junction temperature and MSL Level 1 rating make it appropriate for engine control units, body electronics, and ADAS sensor modules where SMAJ64CAHE3_A/I provides reliable transient immunity.
How does the bidirectional configuration of SMAJ64CAHE3_A/I affect circuit design?
The bidirectional configuration of SMAJ64CAHE3_A/I eliminates polarity concerns during placement - both terminals are functionally identical, allowing flexible routing across differential or single-ended lines without cathode/anode orientation checks. This simplifies layout, reduces assembly errors, and supports symmetric protection schemes in telecom and industrial interfaces where SMAJ64CAHE3_A/I is deployed across balanced signal pairs.
What is the thermal resistance of SMAJ64CAHE3_A/I, and how does it impact PCB layout?
SMAJ64CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain safe junction temperatures under repetitive surges, designers must allocate adequate copper area and avoid excessive trace length between SMAJ64CAHE3_A/I and ground/power planes - insufficient copper increases thermal impedance and risks premature failure.
Does SMAJ64CAHE3_A/I meet UL recognition requirements?
Yes, SMAJ64CAHE3_A/I carries Underwriters Laboratory Recognition under UL 497B (QVGQ2) for protector classification, with file number E136766. Its UL 94 V-0 compliant molding compound and validated electrical performance support safety certification in end equipment such as industrial drives and automotive infotainment systems where SMAJ64CAHE3_A/I serves as a certified transient suppression element.
SMAJ64CAHE3_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):
- 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)
SMAJ64CAHE3_A/I FAQ
1.How can I place an order for SMAJ64CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64CAHE3_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 SMAJ64CAHE3_A/I reliable?
The price and inventory of SMAJ64CAHE3_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 SMAJ64CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ64CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64CAHE3_A/I?
SMAJ64CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64CAHE3_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 SMAJ64CAHE3_A/I?
For technical support, including SMAJ64CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ64CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ64CAHE3_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 SMAJ64CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ64CAHE3_A/I?
All SMAJ64CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64CAHE3_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 SMAJ64CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ64CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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