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Vishay General Semiconductor - Diodes Division SMAJ64CAHE3_A/H
- Part No.:
- SMAJ64CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64CAHE3_A/H.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,937
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Product details
Overview
SMAJ64CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 64 V standoff 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 MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMAJ64CAHE3_A/H datasheet, SMAJ64CAHE3_A/H pinout, SMAJ64CAHE3_A/H application, or SMAJ64CAHE3_A/H equivalent, this device serves as a robust, AEC-Q101-qualified surge protection component for bidirectional DC lines where low clamping voltage, fast response (<1 ps), and stable thermal performance up to +150 °C junction temperature are required.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and low incremental surge resistance, enabling precise clamping during ESD or lightning-induced transients.
The device is rated for 400 W peak pulse power below 78 V (derated to 300 W above), mounted on 5.0 mm × 5.0 mm copper pads, and exhibits a typical thermal resistance of 120 °C/W (junction-to-ambient) - confirming suitability for surface-mount designs with moderate airflow or localized heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC working range. |
| VBR (min/max) | 71.1 V / 78.6 V at 1 mA - Confirmed breakdown threshold ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 103 V at 3.9 A - Clamped voltage under full-rated 10/1000 μs surge; determines protected circuit's maximum stress level. |
| PPPM | 400 W - Peak pulse power handling capability; validates robustness against IEC 61000-4-5 Level 3/4 surges. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush or fault-current tolerance. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 compliant (reflow peak 260 °C), UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (cathode-band side is Terminal 2) | Bidirectional symmetry means no polarity marking; both terminals function identically as line inputs for AC or floating DC protection. |
| Cathode | Terminal 2 (marked with band on unidirectional variants only) | No band present on SMAJ64CAHE3_A/H; terminals are interchangeable - essential for protecting balanced signal pairs or dual-rail supplies. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| 400 W peak pulse power (10/1000 μs) | Withstands repeated surge events per IEC 61000-4-5 without degradation - critical for industrial PLC I/O protection. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage exposure to downstream ICs - e.g., keeps microcontroller I/O pins below absolute maximum ratings during transients. |
| Fast response time (<1 ps) | Clamps before transient energy couples into sensitive circuitry - protects high-speed CAN, LIN, or sensor analog front-ends. |
| RoHS-compliant & halogen-free option available | HE3 suffix confirms RoHS compliance and AEC-Q101 qualification; HM3 variant adds halogen-free molding compound for strict environmental programs. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rail and ground prior to DC-DC converter input. Use Value: Limits voltage to ≤103 V during 400 W surges, preventing damage to 36 V-rated input stages and meeting ISO 16750-2 Pulse 5a requirements. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground to suppress EFT bursts and ESD. Use Value: Clamps 4 kV ESD events within <1 ps while adding <0.5 pF parasitic capacitance - preserves signal integrity up to 10 MHz bandwidth. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding -48 V telecom power distribution boards from lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS installed across input terminals of hot-swap controllers and PMICs. Use Value: Handles repetitive 10/1000 μs surges up to 300 W above 78 V, maintaining system uptime in outdoor cabinet deployments. |
Use Scenario: Adding secondary surge margin to USB 2.0 data lines in smart home hubs. IC Role / Device Role / Timing Role: Paired SMAJ64CAHE3_A/H devices on D+ and D− lines referenced to ground. Use Value: Provides ±15 kV air-gap ESD protection per IEC 61000-4-2 while preserving USB eye diagram compliance due to low dynamic resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64CA-M3 | Same electrical specs and AEC-Q101 qualification; uses halogen-free molding compound instead of standard RoHS-compliant compound. | Required for electronics subject to IEC 61249-2-21 or JEDEC J-STD-709B halogen restrictions. | Select SMAJ64CA-M3 when environmental compliance mandates halogen-free materials without sacrificing surge rating or qualification. |
| SMCJ64CAHE3_A/H | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with 1500 W peak pulse power rating. | Used where higher single-event energy absorption is needed - e.g., main board-level AC/DC input protection. | Choose SMCJ64CAHE3_A/H when PCB layout allows larger footprint and system-level surge immunity requires >400 W capability. |
Compared with SMAJ64CAHE3_A/H, SMAJ64CA-M3 offers identical protection performance with enhanced material compliance, while SMCJ64CAHE3_A/H trades compact size for 3.75× higher pulse power - enabling tiered protection architecture where the SMAJ64CAHE3_A/H serves as point-of-load safeguard and SMCJ64CAHE3_A/H acts as upstream barrier.
Availability
SMAJ64CAHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power feeds, and consumer USB interface protection requiring stable component supply across long production lifecycles.
Supply support for SMAJ64CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMAJ series is engineered for surface-mount transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom systems needing AEC-Q101-qualified, bidirectional TVS solutions in compact SMA packages.
FAQ
What is the clamping voltage of SMAJ64CAHE3_A/H at its rated peak pulse current?
The SMAJ64CAHE3_A/H has a maximum clamping voltage (VC) of 103 V at its rated peak pulse current of 3.9 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream components remain within their absolute maximum ratings. The SMAJ64CAHE3_A/H maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMAJ64CAHE3_A/H suitable for automotive applications?
Yes, SMAJ64CAHE3_A/H is AEC-Q101 qualified and specifically designed for automotive use. Its HE3 suffix denotes RoHS compliance and formal qualification to AEC-Q101 stress tests, including temperature cycling, humidity bias, and mechanical shock. It is deployed in engine control modules, body electronics, and ADAS sensor interfaces where robustness against load dump, jump start, and ESD is mandatory - and its bidirectional behavior simplifies protection of floating or AC-coupled automotive signal lines.
How does the bidirectional configuration of SMAJ64CAHE3_A/H affect its circuit implementation?
The bidirectional configuration of SMAJ64CAHE3_A/H means it functions identically in both polarities - no cathode marking is present, and either terminal may connect to line or ground. This eliminates polarity concerns in AC-coupled circuits, differential signaling (e.g., RS-485), or dual-rail power domains. Unlike unidirectional variants, SMAJ64CAHE3_A/H provides symmetrical clamping without requiring external diode pairing - reducing component count and PCB area while ensuring consistent protection regardless of transient polarity.
What is the thermal resistance of SMAJ64CAHE3_A/H, and how does it impact PCB layout?
SMAJ64CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal. This value assumes standard FR-4 board with no internal planes. To maintain safe junction temperatures under sustained power dissipation (e.g., during repetitive surges), designers must ensure adequate copper area and avoid excessive trace length between the SMAJ64CAHE3_A/H and ground/power planes. For high-duty-cycle applications, adding thermal vias beneath the pads reduces RθJA by up to 30 %.
Does SMAJ64CAHE3_A/H meet industry standards for surge immunity testing?
Yes, SMAJ64CAHE3_A/H is characterized to meet key surge immunity standards including IEC 61000-4-5 (surge immunity) and IEC 61000-4-2 (ESD immunity). Its 400 W peak pulse power rating corresponds to Level 4 (4 kV line-to-earth, 2 kV line-to-line) per IEC 61000-4-5 when applied with proper PCB layout. The device's sub-nanosecond response time and low dynamic impedance enable effective clamping of fast-rising transients defined in these standards - making SMAJ64CAHE3_A/H a validated solution for EN 55032, CISPR 25, and ISO 16750-2 compliance testing.
SMAJ64CAHE3_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:
- -
- 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/H FAQ
1.How can I place an order for SMAJ64CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64CAHE3_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 SMAJ64CAHE3_A/H reliable?
The price and inventory of SMAJ64CAHE3_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 SMAJ64CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ64CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64CAHE3_A/H?
SMAJ64CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64CAHE3_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 SMAJ64CAHE3_A/H?
For technical support, including SMAJ64CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ64CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ64CAHE3_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 SMAJ64CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ64CAHE3_A/H?
All SMAJ64CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64CAHE3_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 SMAJ64CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ64CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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