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Vishay General Semiconductor - Diodes Division SMAJ6.5AHE3/5A
- Part No.:
- SMAJ6.5AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5AHE3/5A.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,876
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Product details
Overview
SMAJ6.5AHE3/5A 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 (10/1000 μs waveform), commonly deployed to protect MOSFET gates and microcontroller I/O pins in automotive body electronics.
For engineers reviewing the SMAJ6.5AHE3/5A datasheet, SMAJ6.5AHE3/5A pinout, SMAJ6.5AHE3/5A application, or SMAJ6.5AHE3/5A equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification status, unidirectional polarity marking, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a shunt-clamping device that remains high-impedance below VWM (6.5 V) and transitions rapidly (<1 ns) into low-impedance conduction when transient voltage exceeds VBR (min 7.22 V). Its glass-passivated junction ensures stable breakdown characteristics and low leakage (ID ≤ 500 μA at VWM).
The device delivers 400 W peak pulse power handling per 10/1000 μs waveform when mounted on specified 0.2" × 0.2" copper pads, with derating above 25 °C ambient per Fig. 2; its 30 °C/W junction-to-lead thermal resistance supports localized heat dissipation during surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for normal circuit operation. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown range defining turn-on threshold; ensures reliable clamping onset above system nominal voltage. |
| VC @ IPPM | 11.2 V at 35.7 A - Clamped voltage during 10/1000 μs surge; must remain below protected IC's absolute maximum input rating. |
| PPPM | 400 W - Peak pulse power capability under standard waveform; determines survivability against common ESD and load-dump transients. |
| ID @ VWM | ≤ 500 μA - Reverse leakage current at stand-off voltage; low value minimizes quiescent power loss and avoids false triggering. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; defines temperature rise per watt under natural convection on recommended PCB layout. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002; cathode indicated by band marking on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients on cathode side. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 5 V rail or MCU I/O); conducts surge current to anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body controllers requiring extended temperature and reliability compliance. |
| 400 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1 and Pulse 2a transients without degradation when mounted on 5.0 mm × 5.0 mm copper pads. |
| Glass passivated junction | Ensures stable VBR over time and temperature, low leakage drift, and resistance to moisture-induced parameter shift. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
| Unidirectional polarity with cathode band | Enables precise orientation during automated placement and guarantees correct clamping direction on DC-biased lines. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protects 12 V supply inputs of BCM microcontrollers from load-dump transients up to 35 V lasting 400 ms. IC Role / Device Role: Shunt-clamping TVS placed between VBAT and GND, triggered only during overvoltage events. Use Value: Limits clamped voltage to 11.2 V, well below MCU's 16 V absolute maximum rating, preventing latch-up or gate oxide damage. |
Use Scenario: Shields 24 V digital input channels of PLC I/O modules from inductive kickback generated by solenoid switching. IC Role / Device Role: Unidirectional TVS connected anode-to-GND, cathode-to-input line, clamping negative-going spikes. Use Value: Withstands 35.7 A surge current while holding line voltage ≤11.2 V, preserving optocoupler and Schmitt-trigger integrity. |
| Consumer Appliance Motor Driver Interface | Automotive Infotainment USB Power Line |
|
Use Scenario: Guards gate-drive signals of half-bridge MOSFETs in washing machine motor inverters against cross-conduction transients. IC Role / Device Role: Low-capacitance TVS on logic-level gate traces, placed adjacent to driver IC output pins. Use Value: Fast <1 ns response and 11.2 V clamping prevent unintended MOSFET turn-on during dV/dt events, reducing shoot-through risk. |
Use Scenario: Suppresses ESD and coupling noise on +5 V VBUS line of automotive USB Type-A ports exposed to human contact. IC Role / Device Role: Primary front-end protection device upstream of USB power switch and load switch ICs. Use Value: 400 W rating handles IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact) discharges without failure or parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5A-E3/5A | No AEC-Q101 qualification; commercial-grade only; identical electrical specs and SMA package. | Not suitable for automotive production; acceptable for industrial or consumer prototypes where qualification is not mandated. | Select when AEC-Q101 is not required and cost sensitivity outweighs automotive reliability assurance. |
| SMAJ6.5AHE3/61 | Same AEC-Q101 qualification and electrical specs; differs only in packaging-7" tape reel (1800 pcs) vs. 13" reel (7500 pcs). | No functional difference; choice driven solely by production volume and SMT line feeder compatibility. | Choose for lower-volume builds or pilot runs where smaller reels reduce inventory and changeover time. |
Compared with SMAJ6.5AHE3/5A, the E3/5A variant offers identical protection performance and automotive qualification but in higher-volume packaging, while the HE3/61 provides the same reliability in smaller reels for prototyping-neither is pin-compatible with bidirectional variants like SMAJ6.5CA due to polarity and circuit topology constraints.
Availability
SMAJ6.5AHE3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, consumer appliance motor drivers, and infotainment USB power lines requiring stable component supply with full AEC-Q101 traceability.
Supply support for SMAJ6.5AHE3/5A 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series targets robust transient suppression in harsh environments-designed for automotive, industrial, and telecom systems where ESD, load dump, and inductive switching surges demand predictable, repeatable clamping behavior.
FAQ
What is the clamping voltage of SMAJ6.5AHE3/5A at its rated peak pulse current?
The SMAJ6.5AHE3/5A has a maximum clamping voltage (VC) of 11.2 V when subjected to its rated peak pulse current (IPPM) of 35.7 A under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads and is critical for ensuring the protected circuit remains within safe operating limits during surge events. The SMAJ6.5AHE3/5A maintains this clamping performance across its qualified temperature range.
Is SMAJ6.5AHE3/5A suitable for bidirectional transient protection?
No, SMAJ6.5AHE3/5A is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only during positive transients on the cathode terminal and blocks reverse voltage beyond its VWM of 6.5 V. For bidirectional protection, the SMAJ6.5CA variant must be used. The SMAJ6.5AHE3/5A is not interchangeable with bidirectional types in circuits requiring symmetrical clamping.
Does SMAJ6.5AHE3/5A meet automotive qualification standards?
Yes, SMAJ6.5AHE3/5A is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock-making it suitable for automotive applications such as body control modules and infotainment power rails. The SMAJ6.5AHE3/5A carries full traceability for production use in Tier-1 supply chains.
What is the thermal resistance of SMAJ6.5AHE3/5A, and how does it affect layout design?
The SMAJ6.5AHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). This value assumes natural convection and dictates PCB copper area requirements: reducing RθJA requires larger thermal pads or internal planes. Its junction-to-lead resistance (RθJL) is 30 °C/W, supporting localized heat transfer to solder joints. Layout decisions for the SMAJ6.5AHE3/5A must align with these thermal metrics to avoid derating in high-ambient environments.
How does the leakage current of SMAJ6.5AHE3/5A impact low-power applications?
The SMAJ6.5AHE3/5A exhibits a maximum reverse leakage current (ID) of 500 μA at its 6.5 V stand-off voltage (VWM), measured at 25 °C. In battery-powered or ultra-low-quiescent-current systems-such as automotive door module sleep modes-this leakage contributes directly to standby power loss. Designers must verify that 500 μA remains within total system budget; for sub-100 μA requirements, lower-leakage alternatives like SMAJ5.0AHE3/5A (ID ≤ 800 μA) or specialized low-ID TVS families should be evaluated alongside the SMAJ6.5AHE3/5A.
SMAJ6.5AHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ6.5AHE3/5A FAQ
1.How can I place an order for SMAJ6.5AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5AHE3/5A 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 SMAJ6.5AHE3/5A reliable?
The price and inventory of SMAJ6.5AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ6.5AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5AHE3/5A?
SMAJ6.5AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5AHE3/5A 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 SMAJ6.5AHE3/5A?
For technical support, including SMAJ6.5AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5AHE3/5A requirements.
6.How does Aetrix verify that SMAJ6.5AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5AHE3/5A 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 SMAJ6.5AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ6.5AHE3/5A?
All SMAJ6.5AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5AHE3/5A, 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 SMAJ6.5AHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ6.5AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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