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Vishay General Semiconductor - Diodes Division SMAJ6.5A-E3/5A
- Part No.:
- SMAJ6.5A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5A-E3/5A.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,605
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Product details
Overview
SMAJ6.5A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal 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 rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial electronics.
For engineers reviewing the SMAJ6.5A-E3/5A datasheet, SMAJ6.5A-E3/5A pinout, SMAJ6.5A-E3/5A application, or SMAJ6.5A-E3/5A equivalent, key selection criteria include unidirectional polarity, 11.2 V clamping performance under 35.7 A surge, RoHS-compliant matte tin-plated leads, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector: under normal conditions it presents high impedance (>500 μA leakage at 6.5 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, enabling consistent clamping across repetitive 10/1000 μs surges at 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). Its unidirectional configuration uses cathode-band marking and supports forward surge current up to 40 A (8.3 ms half-sine), making it suitable for DC-biased protection paths in power supply rails and I/O lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse working voltage before leakage exceeds 500 μA; defines safe operating margin below breakdown. |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown range ensuring reliable triggering without premature conduction. |
| VC @ IPPM | 11.2 V at 35.7 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 400 W - Peak pulse power handling capability; specifies energy absorption limit per transient event. |
| ID @ VWM | 500 μA - Reverse leakage at rated stand-off voltage; impacts quiescent power loss and noise coupling in sensitive analog paths. |
| TJ max | +150 °C - Maximum junction temperature; sets thermal derating boundary for sustained power dissipation (PD = 3.3 W). |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.0 mm × 5.0 mm thermal pad footprint; supports automated reflow at 260 °C peak. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential rail; completes conduction path during transient clamp. |
| Cathode (banded end) | High-side connection point | Connected to protected line (e.g., VCC, signal); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems without derating. |
| 11.2 V clamping voltage at 35.7 A | Limits downstream IC stress to safe levels during 30 A+ transients, preserving logic-level compatibility with 5 V/3.3 V interfaces. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-baking requirement and supports standard lead-free assembly processes without moisture-induced failure risk. |
| Glass passivated junction | Ensures long-term VBR stability (<±5% shift after 1000 hrs HTOL) and low leakage drift across temperature and life cycles. |
| RoHS-compliant, matte tin plating | Guarantees solderability per J-STD-002/JESD22-B102 and whisker resistance per JESD201 Class 2 for high-reliability deployments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, triggered within <1 ps to clamp spikes up to 35 V. Use Value: Prevents damage to MCU power inputs and CAN transceivers by limiting clamped voltage to 11.2 V during 35.7 A surges. |
Use Scenario: Guarding analog output lines (e.g., 4–20 mA current loops) in PLC I/O modules against ESD and field-wiring faults. IC Role / Device Role / Timing Role: Fast-response voltage clamp on signal return path, absorbing ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity below 12 V during transients, avoiding ADC saturation and false trip events in safety-critical loops. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
|
Use Scenario: Protecting primary-side controllers and rectifiers in AC/DC adapters from lightning-induced surges on input AC lines. IC Role / Device Role / Timing Role: Secondary-side TVS on DC bus post-bridge, clamping switching noise and coupled transients. Use Value: Withstands 400 W pulses without degradation, extending adapter lifetime in regions with unstable grid conditions. |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras, access points) against induced surges on 48 V DC feeds. IC Role / Device Role / Timing Role: Unidirectional suppressor on DC input rail, coordinated with upstream MOVs to handle differential-mode transients. Use Value: Delivers 11.2 V clamping at 35.7 A, ensuring powered devices remain operational during 10/1000 μs surges up to 1 kV. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5AHE3_A/I | AEC-Q101 qualified; identical electrical specs but validated for automotive-grade reliability testing (HTOL, TC, UHAST). | Required for ASIL-B compliant ECUs; not needed for commercial/industrial use where qualification is optional. | Select SMAJ6.5AHE3_A/I only when automotive qualification is mandated by OEM or functional safety requirements. |
| P6SMB6.5A | Same VWM/VBR/VC ratings but in larger SMB (DO-214AA) package; higher RθJA (150 °C/W) limits power handling in compact layouts. | Better suited for manual prototyping or legacy PCBs with SMB footprints; less optimal for high-density SMT designs. | Choose P6SMB6.5A only if board layout constraints require SMB pad dimensions or existing design reuse is prioritized over thermal efficiency. |
Compared with SMAJ6.5AHE3_A/I, the SMAJ6.5A-E3/5A offers identical clamping and surge performance at lower cost and qualification overhead, while P6SMB6.5A trades thermal efficiency for mechanical compatibility - making SMAJ6.5A-E3/5A optimal for cost-sensitive, space-constrained industrial and consumer applications requiring proven 400 W transient immunity.
Availability
SMAJ6.5A-E3/5A is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom DC feed safeguarding requiring stable component supply and full traceability.
Supply support for SMAJ6.5A-E3/5A 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, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMAJ series targets high-speed transient suppression in space-constrained, high-volume applications - engineered for rapid response, repeatable clamping, and seamless integration into automated SMT lines across automotive, industrial, and communications markets.
FAQ
What is the maximum clamping voltage of the SMAJ6.5A-E3/5A under a 10/1000 μs surge?
The SMAJ6.5A-E3/5A has a maximum clamping voltage (VC) of 11.2 V when subjected to its rated peak pulse current of 35.7 A with a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected circuits experience no more than 11.2 V during such transients - critical for safeguarding 5 V and 3.3 V logic components. The SMAJ6.5A-E3/5A maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is the SMAJ6.5A-E3/5A RoHS-compliant and suitable for lead-free reflow?
Yes, the SMAJ6.5A-E3/5A carries the "E3" suffix indicating full RoHS compliance and qualification for lead-free reflow processing. Its matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards, and it is rated MSL Level 1 with a maximum peak reflow temperature of 260 °C - eliminating the need for baking prior to assembly. The SMAJ6.5A-E3/5A is designed for compatibility with standard IPC-7095-compliant SMT lines.
How does the SMAJ6.5A-E3/5A differ from bidirectional variants like SMAJ6.5CA?
The SMAJ6.5A-E3/5A is unidirectional, meaning it conducts only in reverse bias (cathode to anode) and blocks forward current beyond its VF (~3.5 V at 25 A). In contrast, SMAJ6.5CA is bidirectional and symmetrical, conducting in both directions - making it suitable for AC lines or differential signals. The SMAJ6.5A-E3/5A is preferred for DC power rail protection where polarity is fixed, offering tighter VBR control and lower leakage than its CA counterpart.
What is the thermal resistance and power derating behavior of the SMAJ6.5A-E3/5A?
The SMAJ6.5A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. Its steady-state power dissipation (PD) is rated at 3.3 W at TA = 50 °C, derating linearly above 25 °C per Figure 2 in the datasheet. The SMAJ6.5A-E3/5A must be thermally anchored to adequate copper area to sustain repetitive surge duty cycles.
Can the SMAJ6.5A-E3/5A be used in automotive applications requiring AEC-Q101 qualification?
The SMAJ6.5A-E3/5A itself is not AEC-Q101 qualified; it is a commercial-grade part. For automotive use, Vishay offers the SMAJ6.5AHE3_A/I variant - identical electrically but fully tested to AEC-Q101 stress requirements including HTOL, temperature cycling, and unbiased HAST. If your design requires formal automotive qualification, specify SMAJ6.5AHE3_A/I instead of SMAJ6.5A-E3/5A; the SMAJ6.5A-E3/5A remains valid for non-automotive or pre-qualification prototyping stages.
SMAJ6.5A-E3/5A 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ6.5A-E3/5A FAQ
1.How can I place an order for SMAJ6.5A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5A-E3/5A 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 SMAJ6.5A-E3/5A reliable?
The price and inventory of SMAJ6.5A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ6.5A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5A-E3/5A?
SMAJ6.5A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5A-E3/5A 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 SMAJ6.5A-E3/5A?
For technical support, including SMAJ6.5A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5A-E3/5A requirements.
6.How does Aetrix verify that SMAJ6.5A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5A-E3/5A 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 SMAJ6.5A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ6.5A-E3/5A?
All SMAJ6.5A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5A-E3/5A, 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 SMAJ6.5A-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ6.5A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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