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Vishay General Semiconductor - Diodes Division SMAJ6.5CAHE3_A/I
- Part No.:
- SMAJ6.5CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CAHE3_A/I.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,185
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Product details
Overview
SMAJ6.5CAHE3_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 and power lines. It features 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA test current, 400 W peak pulse power (10/1000 μs), and clamps to ≤11.2 V at 35.7 A peak surge current - used in automotive sensor interfaces, industrial I/O protection, and USB/RS-485 line safeguarding.
For engineers reviewing the SMAJ6.5CAHE3_A/I datasheet, SMAJ6.5CAHE3_A/I pinout, SMAJ6.5CAHE3_A/I application, or SMAJ6.5CAHE3_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 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both polarities, enabling robust transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
The SMAJ6.5CAHE3_A/I delivers 400 W peak pulse power at 25 °C, derating linearly above TA = 25 °C per Fig. 2, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). It meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 7.22 V / 7.98 V at IT = 10 mA - guaranteed avalanche onset range under standardized test conditions |
| VC @ IPPM | ≤11.2 V at 35.7 A - clamped voltage during 10/1000 μs surge, defining worst-case downstream overvoltage |
| PPPM | 400 W (10/1000 μs waveform) - peak transient energy handling capacity on standard PCB pad layout |
| ID @ VWM | ≤500 μA - leakage current at stand-off voltage, critical for low-power sensor line integrity |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; either terminal serves as cathode or anode depending on transient polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) when mounted per recommended pad layout |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot across protected ICs such as CAN transceivers or microcontroller GPIOs |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without moisture-related delamination or popcorn failure |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage performance across temperature and life cycles |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching ADC input or signal conditioner. Use Value: Limits induced voltage to ≤11.2 V during 35.7 A surges, preserving sensor signal integrity and preventing MCU reset or latch-up. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Common-mode TVS pair across A/B lines and shield, suppressing EFT bursts and lightning-induced common-mode spikes. Use Value: Maintains RS-485 receiver common-mode range compliance by clamping transients within ±11.2 V, avoiding bus lockup or false logic states. |
| USB 2.0 Data Line Protection | DC Power Rail Clamping |
Use Scenario: ESD and cable discharge protection for USB D+/D− lines in automotive infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to USB connector to absorb ±15 kV contact ESD per IEC 61000-4-2. Use Value: Sub-100 pF junction capacitance minimizes signal distortion, while 11.2 V clamping prevents PHY damage during fast transients. |
Use Scenario: Overvoltage clamping on 5 V or 12 V supply rails feeding safety-critical microcontrollers in industrial controllers. IC Role / Device Role / Timing Role: Parallel-connected TVS across rail and ground to divert surge energy away from LDOs and digital ICs during load dump events. Use Value: Withstands 400 W surge energy without degradation, maintaining rail voltage below 11.2 V to prevent brownout or internal regulator failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5CA-E3/61 | Commercial-grade (non-AEC-Q101), same electrical specs and SMA package | Lacks automotive qualification; suitable for consumer or industrial non-automotive use | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMBJ6.5CAHE3_A/I | Same AEC-Q101 qualification but SMB (DO-214AA) package - 25 % larger footprint, higher 600 W PPPM rating | Better thermal dissipation and surge margin; requires PCB layout change | Choose when higher surge immunity (e.g., ISO 16750-2 Pulse 5b) or improved thermal margin is needed |
Compared with SMAJ6.5CAHE3_A/I, the SMAJ6.5CA-E3/61 offers identical clamping performance at lower cost but no automotive qualification, while the SMBJ6.5CAHE3_A/I provides greater surge robustness in a larger package - requiring layout revision but enabling longer lifetime in high-stress environments.
Availability
SMAJ6.5CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial communication ports, and USB data line protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMAJ6.5CAHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The SMAJ series targets high-reliability transient suppression in space-constrained, high-surge environments - engineered for automotive, industrial, and telecom systems where clamping speed, consistency, and qualification rigor are mandatory.
FAQ
What does the "CA" suffix indicate in SMAJ6.5CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration: SMAJ6.5CAHE3_A/I suppresses transients equally in both polarities, making it ideal for AC-coupled or differential signal lines where polarity is undefined. Unlike unidirectional variants (e.g., SMAJ6.5A), it has no cathode marking and exhibits symmetric VBR and VC characteristics in forward and reverse directions - confirmed in the Vishay datasheet Section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SMAJ6.5CAHE3_A/I suitable for protecting CAN bus lines?
Yes, SMAJ6.5CAHE3_A/I is commonly deployed for CAN FD and classical CAN bus protection due to its 11.2 V clamping voltage, which stays well within the ISO 11898-2 common-mode range (±36 V) and avoids interfering with bus signaling thresholds. Its AEC-Q101 qualification, low leakage (<500 μA), and fast response ensure reliable operation in automotive network nodes - verified in Vishay's application guidance for automotive data buses.
How does the HE3 suffix affect the specifications of SMAJ6.5CAHE3_A/I?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade variants like SMAJ6.5CA-E3. SMAJ6.5CAHE3_A/I undergoes extended stress testing (HTOL, TC, UHAST) per AEC-Q101 Rev H, ensuring reliability in automotive under-hood temperatures up to +150 °C junction. Electrical specs remain identical to non-HE3 versions; only qualification scope and material compliance differ.
What is the maximum allowable PCB pad size for optimal thermal performance of SMAJ6.5CAHE3_A/I?
Vishay specifies that SMAJ6.5CAHE3_A/I achieves its rated 400 W peak pulse power when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - as defined in the "MAXIMUM RATINGS" table footnote (2). Larger pads improve thermal dissipation and surge margin, but reducing pad area below this de-rates PPPM significantly; thermal resistance rises from 120 °C/W toward 150+ °C/W with smaller layouts.
Does SMAJ6.5CAHE3_A/I meet UL 497B recognition, and what does that mean for system certification?
Yes, SMAJ6.5CAHE3_A/I carries Underwriters Laboratory Recognition under UL 497B (file E136766) for both unidirectional and bidirectional protectors. This means the device itself is certified as a component-level surge protector - simplifying end-equipment certification for telecom, industrial, and automotive systems by eliminating need for additional component-level validation of transient suppression performance.
SMAJ6.5CAHE3_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):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 35.7A
- 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)
SMAJ6.5CAHE3_A/I FAQ
1.How can I place an order for SMAJ6.5CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/I reliable?
The price and inventory of SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CAHE3_A/I?
SMAJ6.5CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/I?
For technical support, including SMAJ6.5CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ6.5CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CAHE3_A/I?
All SMAJ6.5CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ6.5CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5CAHE3_A/I Tags
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