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Vishay General Semiconductor - Diodes Division SMAJ6.5-E3/5A
- Part No.:
- SMAJ6.5-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5-E3/5A.pdf
- Description:
- TVS DIODE 6.5VWM 12.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ6.5-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping transient overvoltages on power and signal lines. It features a 6.5 V stand-off voltage (VWM), 7.22–8.82 V breakdown voltage (VBR at 10 mA), 12.3 V maximum clamping voltage (VC) at 32.5 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 control systems.
For engineers reviewing the SMAJ6.5-E3/5A datasheet, SMAJ6.5-E3/5A pinout, SMAJ6.5-E3/5A application, or SMAJ6.5-E3/5A equivalent, key selection criteria include its unidirectional polarity, 12.3 V clamping performance under 32.5 A surge, RoHS-compliant matte tin-plated leads, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 0.2 × 0.2" copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (7.22–8.82 V). Its low incremental surge resistance and fast response time enable effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device is rated for 400 W peak pulse power (10/1000 µs), derated to 300 W above 78 V, and supports 40 A non-repetitive forward surge current (8.3 ms half-sine). Junction temperature range spans −55 °C to +150 °C, with thermal resistance of 120 °C/W (junction-to-ambient) on standard PCB pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 6.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown Voltage) | 7.22–8.82 V at 10 mA - Confirmed avalanche onset range defining reliable triggering threshold |
| VC (Clamping Voltage) | 12.3 V at 32.5 A - Peak voltage seen by protected circuit during 10/1000 µs transient event |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability under standardized surge waveform |
| IPPM (Peak Pulse Current) | 32.5 A - Maximum surge current the device safely diverts without failure |
| IR (Reverse Leakage) | < 800 µA at 6.5 V - Minimal DC loading on protected line during normal operation |
| TJ Range | −55 °C to +150 °C - Full operational junction temperature envelope for harsh-environment deployment |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, unidirectional configuration with cathode band marking. Dimensions per Figure 5: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), 0.76 mm lead thickness, 1.88 mm cathode band position.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line; conducts avalanche current when transient exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress |
| MSL Level 1 per J-STD-020 | Enables standard reflow assembly without pre-baking; peak solder temperature up to 260 °C supported |
| RoHS-compliant matte tin plating | Meets J-STD-002 and JESD22-B102 solderability standards; JESD201 Class 1A whisker resistance |
| Low profile DO-214AC package | 0.208" length enables high-density PCB layouts while maintaining 400 W surge handling |
| 400 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in engine control units (ECUs) and body electronics from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 6.5 V. Use Value: Limits transient voltage to ≤12.3 V during 32.5 A events, preventing damage to downstream 16 V-rated regulators and microcontrollers. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in PLC I/O modules from field-wiring induced surges. IC Role / Device Role / Timing Role: TVS mounted across signal and return paths to absorb fast-rising transients before reaching precision DACs or op-amps. Use Value: Clamps sub-µs ESD events to safe levels while adding only 800 µA leakage at 6.5 V, preserving loop accuracy. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeding Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for smart home devices subjected to mains-borne surges. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to local ground on regulated 5 V or 9 V output rails. Use Value: Responds in <1 ps to suppress 10/1000 µs transients, ensuring compliance with IEC 62368-1 secondary circuit safety limits. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from longitudinal surges entering via Ethernet cabling. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on each DC feed line (spare pairs) referenced to common-mode ground. Use Value: Withstands 400 W pulses without degradation, enabling robust 60 V max PoE+ (IEEE 802.3at) system-level surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5A-E3/5A | Lower VBR range (7.22–7.98 V), tighter tolerance; 11.2 V clamping at 35.7 A | Better suited for systems requiring tighter voltage margin below 12 V logic rails | Select when precise clamping near 11 V is required and higher IPPM tolerance is acceptable |
| SMBJ6.5-E3/5A | Same VWM/VBR, but SMB package (DO-214AA); 600 W PPPM, 53.5 A IPPM | Higher power handling, larger footprint; requires revised pad layout and thermal design | Choose for enhanced surge margin where board space permits larger package and higher 600 W rating |
Compared with SMAJ6.5-E3/5A, SMAJ6.5A-E3/5A offers tighter breakdown control for critical voltage margins, while SMBJ6.5-E3/5A delivers 50 % higher surge current capacity in a physically larger package - both require validation of layout, thermal path, and system-level clamping targets before substitution.
Availability
SMAJ6.5-E3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, consumer power adapters, and telecom PoE equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ6.5-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, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The SMAJ series is engineered for robust transient suppression in automotive, industrial, and communications systems - optimized for automated SMT assembly, high surge endurance, and stable clamping across temperature and lifetime.
FAQ
What is the clamping voltage of SMAJ6.5-E3/5A under maximum rated surge current?
The SMAJ6.5-E3/5A exhibits a maximum clamping voltage (VC) of 12.3 V when subjected to its rated peak pulse current of 32.5 A using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on 0.2 × 0.2" copper pads and defines the upper voltage limit imposed on protected circuits during surge events. The SMAJ6.5-E3/5A maintains this clamping performance across its full operating temperature range.
Is SMAJ6.5-E3/5A suitable for automotive applications requiring AEC-Q101 qualification?
No - SMAJ6.5-E3/5A carries the "E3" suffix, indicating RoHS-compliant commercial-grade construction. For AEC-Q101 qualified automotive use, the "HE3" variant (e.g., SMAJ6.5HE3/5A) must be selected. That version undergoes additional stress testing and screening per AEC-Q101 Rev D and is explicitly rated for under-hood and powertrain environments. The SMAJ6.5-E3/5A remains appropriate for non-automotive industrial and consumer applications.
How does the unidirectional configuration of SMAJ6.5-E3/5A affect its circuit placement?
The SMAJ6.5-E3/5A is unidirectional and marked with a cathode band; it must be oriented with the banded end toward the protected line and the anode tied to ground or the lower-potential reference. This configuration allows forward conduction only during negative transients relative to ground - unlike bidirectional variants, it does not suppress symmetrical surges. Correct orientation is essential to ensure clamping action on positive-going transients on the protected node. The SMAJ6.5-E3/5A datasheet specifies polarity explicitly in the mechanical drawings and marking code table.
What is the maximum reverse leakage current specified for SMAJ6.5-E3/5A at its stand-off voltage?
At its rated stand-off voltage of 6.5 V and TA = 25 °C, the SMAJ6.5-E3/5A has a maximum reverse leakage current (IR) of 800 µA. This value ensures minimal parasitic loading on sensitive signal or power lines during normal operation while preserving noise margin and power efficiency. Leakage remains within specification across the full −55 °C to +150 °C junction temperature range, with typical values decreasing at lower temperatures. The SMAJ6.5-E3/5A leakage performance is verified per JEDEC test conditions in the official Vishay datasheet.
Can SMAJ6.5-E3/5A be used in place of SMAJ6.0-E3/5A without redesigning the PCB layout?
Yes - SMAJ6.5-E3/5A and SMAJ6.0-E3/5A share identical DO-214AC (SMA) package dimensions, pinout, and solder pad requirements per Vishay's mechanical drawings. Both devices use the same mounting footprint and thermal pad layout. However, the higher VWM (6.5 V vs. 6.0 V) and clamping voltage (12.3 V vs. 11.4 V) of SMAJ6.5-E3/5A may alter system-level protection margins; electrical validation is required to confirm compatibility with downstream voltage tolerances. The SMAJ6.5-E3/5A remains mechanically drop-in compatible.
SMAJ6.5-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 32.5A
- 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)
SMAJ6.5-E3/5A FAQ
1.How can I place an order for SMAJ6.5-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5-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 SMAJ6.5-E3/5A reliable?
The price and inventory of SMAJ6.5-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 SMAJ6.5-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ6.5-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5-E3/5A?
SMAJ6.5-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5-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 SMAJ6.5-E3/5A?
For technical support, including SMAJ6.5-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5-E3/5A requirements.
6.How does Aetrix verify that SMAJ6.5-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5-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 SMAJ6.5-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ6.5-E3/5A?
All SMAJ6.5-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5-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 SMAJ6.5-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ6.5-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5-E3/5A Tags
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