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Vishay General Semiconductor - Diodes Division SMAJ6.5CAHE3_A/H
- Part No.:
- SMAJ6.5CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CAHE3_A/H.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,315
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Product details
Overview
SMAJ6.5CAHE3_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 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 11.2 V maximum clamping voltage (VC) at 35.7 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform), targeting protection of MOSFETs and ICs in automotive and industrial power supplies.
For engineers reviewing the SMAJ6.5CAHE3_A/H datasheet, SMAJ6.5CAHE3_A/H pinout, SMAJ6.5CAHE3_A/H application, or SMAJ6.5CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.55), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling suppression of positive and negative transients without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<500 μA at VWM), while the SMA package provides thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead).
The device delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold, with fast response time (<1.0 ps) and low incremental surge resistance - critical for protecting sensitive inputs against ESD, lightning-induced surges, and inductive switching spikes in 12 V/24 V automotive subsystems and industrial sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 5 V–6.5 V nominal circuits. |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown range ensures reliable triggering across temperature and unit variation. |
| VC @ IPPM | 11.2 V at 35.7 A - Clamping voltage limits downstream component stress during 10/1000 μs surge events. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak pulse power rating determines survivability under standardized lightning/surge waveforms. |
| ID @ VWM | ≤500 μA - Low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and thermally constrained industrial enclosures. |
| MSL Level | Level 1 per J-STD-020 - Supports standard reflow profiles without baking; compatible with high-volume SMT assembly. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); terminals are matte tin-plated for solderability per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | One terminal of symmetrical PN junction; conducts during negative voltage excursions beyond VBR. |
| Cathode | Transient current entry (positive half-cycle) | Second terminal of symmetrical PN junction; conducts during positive voltage excursions beyond VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 surge events up to 4 kV (line-to-earth) when properly laid out with 0.2" × 0.2" copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage exposure to protected ICs - e.g., keeps microcontroller I/O below absolute maximum ratings during transients. |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage performance across temperature cycling and humidity exposure. |
| MSL Level 1, LF peak 260 °C | Eliminates pre-bake requirement and supports standard lead-free reflow profiles without popcorn or delamination risk. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protection of 12 V supply rails feeding infotainment head units and ADAS camera modules against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of DC/DC converters and LDOs to limit input voltage excursion. Use Value: Withstands 400 W surges while clamping to ≤11.2 V, preventing damage to 16 V-rated input stages and maintaining system uptime. |
Use Scenario: ESD and surge protection on RS-485/RS-422 differential pairs in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Symmetric transient shunt across differential bus lines to divert common-mode and differential-mode energy. Use Value: Low capacitance (<100 pF at VWM) avoids signal integrity degradation at 10 Mbps data rates while meeting IEC 61000-4-2 Level 4. |
| Consumer USB Power Ports | Telecom Base Station DC Feeds |
|
Use Scenario: Overvoltage protection on 5 V USB Type-C VBUS lines exposed to hot-plug and adapter fault conditions. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between connector and port controller to absorb 8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-12 V clamping ensures USB PD controllers remain within 20 V absolute maximum rating, avoiding latch-up or permanent failure. |
Use Scenario: Secondary-side surge protection on -48 V DC telecom rectifier outputs feeding remote radio units. IC Role / Device Role / Timing Role: Bidirectional clamp referenced to system ground to suppress lightning-induced common-mode surges on DC distribution lines. Use Value: AEC-Q101 qualification and 150 °C max junction temperature support deployment in uncooled outdoor cabinets with wide ambient swings. |
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 | Same electrical specs and SMA package; RoHS-compliant commercial grade without AEC-Q101 qualification. | Lacks automotive qualification; suitable for consumer/industrial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle assurance is not needed. |
| SMBJ6.5CAHE3_A/H | Same VWM/VBR/VC specs but in larger SMB (DO-214AA) package with higher 600 W PPPM rating and lower RθJA (90 °C/W). | Better thermal performance and surge margin; requires larger PCB footprint and different pad layout. | Choose when higher surge robustness is required and board space allows SMB footprint; not drop-in compatible. |
Compared with SMAJ6.5CAHE3_A/H, the SMAJ6.5CA-E3/61 offers identical protection performance at lower cost but lacks automotive qualification, while the SMBJ6.5CAHE3_A/H provides superior thermal handling and surge capacity at the expense of PCB area - making each suitable for distinct reliability and layout constraints.
Availability
SMAJ6.5CAHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, consumer USB power port hardening, telecom DC feed protection, and embedded control system surge mitigation requiring stable component supply and AEC-Q101 compliance.
Supply support for SMAJ6.5CAHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom systems where robustness against ESD, lightning, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of SMAJ6.5CAHE3_A/H at its rated peak pulse current?
The SMAJ6.5CAHE3_A/H has a maximum clamping voltage (VC) of 11.2 V at its specified peak pulse current (IPPM) of 35.7 A under a 10/1000 μs waveform. This value is measured per JEDEC standards and reflects worst-case voltage seen by downstream circuitry during surge events - critical for ensuring protected ICs remain within their absolute maximum voltage ratings. The SMAJ6.5CAHE3_A/H achieves this with a low clamping ratio of approximately 1.55 relative to its minimum VBR of 7.22 V.
Is SMAJ6.5CAHE3_A/H suitable for automotive applications?
Yes, SMAJ6.5CAHE3_A/H is AEC-Q101 qualified, meaning it has passed stress tests for high-temperature operating life, temperature cycling, humidity bias, and mechanical shock required for automotive electronic components. Its 150 °C maximum junction temperature, MSL Level 1 rating, and bidirectional architecture make it appropriate for use in engine control units, body electronics, and ADAS power domains - unlike non-qualified variants such as SMAJ6.5CA-E3/61. The "HE3" suffix explicitly denotes AEC-Q101 compliance.
How does the bidirectional design of SMAJ6.5CAHE3_A/H affect its circuit placement?
The bidirectional design of SMAJ6.5CAHE3_A/H means it has no polarity marking and can be placed across any two points needing symmetrical overvoltage protection - such as across a DC supply rail or differential signal pair - without regard to anode/cathode orientation. This simplifies layout and eliminates risk of reverse installation. Unlike unidirectional TVS diodes, SMAJ6.5CAHE3_A/H clamps both positive and negative transients equally, making it ideal for AC-coupled lines or floating references where voltage polarity is undefined or alternating.
What is the maximum reverse leakage current for SMAJ6.5CAHE3_A/H at its stand-off voltage?
The SMAJ6.5CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 500 μA at its 6.5 V stand-off voltage (VWM), measured at 25 °C. This low leakage ensures minimal impact on high-impedance circuits such as sensor bias networks or battery-monitoring inputs, preserving accuracy and reducing standby power consumption. Leakage remains well-controlled across temperature, supporting stable operation in industrial environments where ambient temperatures may exceed 85 °C.
Does SMAJ6.5CAHE3_A/H require special PCB layout considerations for optimal surge performance?
Yes - to achieve its rated 400 W peak pulse power, SMAJ6.5CAHE3_A/H must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, per Vishay's datasheet Figure 1. Smaller pads increase thermal impedance and reduce surge handling capability. Additionally, short, direct traces to protected nodes minimize inductance, and grounding both terminals to a solid plane improves common-mode suppression. These practices ensure the SMAJ6.5CAHE3_A/H clamps within specification during real-world IEC 61000-4-5 events.
SMAJ6.5CAHE3_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):
- 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/H FAQ
1.How can I place an order for SMAJ6.5CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/H reliable?
The price and inventory of SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CAHE3_A/H?
SMAJ6.5CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/H?
For technical support, including SMAJ6.5CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ6.5CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CAHE3_A/H?
All SMAJ6.5CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CAHE3_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 SMAJ6.5CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ6.5CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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