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Vishay General Semiconductor - Diodes Division SMAJ6.5C-E3/5A
- Part No.:
- SMAJ6.5C-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5C-E3/5A.pdf
- Description:
- TVS DIODE 6.5VWM 12.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,075
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Product details
Overview
SMAJ6.5C-E3/5A from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping ESD and surge transients on signal/power lines. It features 6.5 V stand-off voltage (VWM), 12.3 V maximum clamping voltage (VC) at 32.5 A peak pulse current (IPPM), 400 W peak pulse power (10/1000 µs), and operates from −55 °C to +150 °C - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMAJ6.5C-E3/5A datasheet, SMAJ6.5C-E3/5A pinout, SMAJ6.5C-E3/5A application, or SMAJ6.5C-E3/5A equivalent, key selection criteria include bi-directional clamping capability, low VC/VWM ratio (1.89), RoHS-compliant matte tin terminals, MSL Level 1 rating, and compatibility with automated SMT placement on 5.0 × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response to transients and low incremental surge resistance. Its symmetrical breakdown behavior ensures identical clamping in both polarities, with VBR min/max of 7.22 V / 8.82 V at 10 mA test current.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation up to 150 °C junction temperature. The device meets JESD201 Class 1A whisker resistance and is rated for solder dip at 260 °C for 40 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse operating voltage before clamping begins |
| VC @ IPPM | 12.3 V at 32.5 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling per 10/1000 µs waveform on specified PCB pad layout |
| IPPM | 32.5 A - maximum non-repetitive surge current the device safely clamps without failure |
| VBR Range | 7.22–8.82 V at 10 mA - verified breakdown voltage window ensuring consistent turn-on across production lot |
| TJ Range | −55 °C to +150 °C - full operational junction temperature range for under-hood automotive use |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking - cathode band absent per specification for C-suffix devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bi-directional terminals conduct equally in either polarity; no functional distinction between ends |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when mounted per recommended 5.0 × 5.0 mm pad layout |
| MSL Level 1 rating | Allows unlimited floor life and reflow compatibility with standard Pb-free profiles up to 260 °C peak |
| Glass-passivated junction | Ensures stable leakage (<500 µA at VWM) and long-term reliability under thermal cycling |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Limits induced voltage to ≤12.3 V during 32.5 A surges, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges and ESD events in factory automation environments. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input lines, coordinated with series impedance for energy absorption. Use Value: Withstands repetitive 400 W pulses at 0.01 % duty cycle, enabling robust operation in high-noise industrial settings. |
| Consumer USB Port ESD Protection | Telecom Line Interface |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines in portable electronics where primary protection resides upstream. IC Role / Device Role / Timing Role: Fast-response bi-directional clamp absorbing ±8 kV contact discharge per IEC 61000-4-2. Use Value: Low 12.3 V clamping prevents latch-up in USB transceivers while maintaining signal integrity via <100 pF junction capacitance. |
Use Scenario: Surge suppression on Ethernet PHY side of PoE-powered equipment and DSL line drivers. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor placed before isolation transformer or common-mode choke. Use Value: 6.5 V VWM aligns with typical 5 V bias rails; 12.3 V VC ensures safe margin below 15 V absolute maximum ratings of PHY ICs. |
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-E3/5A | Same VWM, VBR, and VC; CA suffix denotes identical bi-directional specification per Vishay documentation | No functional difference - CA and C suffixes are interchangeable per Document 88390 revision 29-Oct-08 | Select SMAJ6.5C-E3/5A or SMAJ6.5CA-E3/5A based on distributor stock; both meet identical electrical and mechanical specs. |
| SMBJ6.5C-E3/52 | DO-214AA (SMB) package, 600 W PPPM, same VWM/VC but higher IPPM (43.5 A) and larger footprint | Used where higher surge margin is required and board space permits larger package | Choose SMBJ6.5C-E3/52 only if 600 W rating is mandatory; SMAJ6.5C-E3/5A remains optimal for space-constrained 400 W designs. |
Compared with SMAJ6.5CA-E3/5A (functionally identical), and SMBJ6.5C-E3/52 (higher power, larger package), the SMAJ6.5C-E3/5A delivers certified 400 W bi-directional clamping in the smallest standard surface-mount TVS outline, balancing surge robustness, PCB area, and automated assembly compatibility.
Availability
SMAJ6.5C-E3/5A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, and consumer USB port ESD protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ6.5C-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.
The SMAJ series was developed specifically for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering standardized 400 W surge capability in compact DO-214AC packaging with AEC-Q101 readiness.
FAQ
What does the "C" suffix indicate in SMAJ6.5C-E3/5A?
The "C" suffix in SMAJ6.5C-E3/5A designates a bi-directional configuration, meaning the device provides symmetrical transient suppression in both polarities. Per Vishay Document 88390, this eliminates the need for polarity-aware placement and enables use on AC-coupled or floating lines. SMAJ6.5C-E3/5A has no cathode band marking, distinguishing it from uni-directional variants like SMAJ6.5A-E3/5A.
What is the maximum clamping voltage of SMAJ6.5C-E3/5A under surge conditions?
The maximum clamping voltage (VC) of SMAJ6.5C-E3/5A is 12.3 V, measured at its rated peak pulse current of 32.5 A using the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMAJ6.5C-E3/5A suitable for automotive applications?
Yes, SMAJ6.5C-E3/5A is suitable for automotive applications. While the base E3 grade is commercial, its construction - including glass-passivated junction, MSL Level 1 rating, 150 °C max junction temperature, and compliance with JESD201 Class 1A whisker testing - supports under-hood and body-control module use. For AEC-Q101 qualified versions, specify HE3 suffix (e.g., SMAJ6.5CHE3/5A).
How does SMAJ6.5C-E3/5A differ from SMAJ6.5A-E3/5A?
SMAJ6.5C-E3/5A is bi-directional with no polarity marking and identical clamping in both directions, whereas SMAJ6.5A-E3/5A is uni-directional with a cathode band and conducts only in reverse bias. Their VWM (6.5 V) and VC (11.2 V for SMAJ6.5A) differ due to distinct breakdown characteristics - SMAJ6.5C-E3/5A clamps at 12.3 V, reflecting its symmetrical structure.
What PCB layout guidance applies to SMAJ6.5C-E3/5A for optimal surge performance?
For optimal surge performance, SMAJ6.5C-E3/5A must be mounted on minimum 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pads per terminal, as specified in Vishay Document 88390. This pad area ensures adequate heat dissipation during 400 W pulses and maintains the rated IPPM of 32.5 A. Smaller pads cause thermal derating and reduced surge capability.
SMAJ6.5C-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ6.5C-E3/5A FAQ
1.How can I place an order for SMAJ6.5C-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5C-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 SMAJ6.5C-E3/5A reliable?
The price and inventory of SMAJ6.5C-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 SMAJ6.5C-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ6.5C-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5C-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5C-E3/5A?
SMAJ6.5C-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5C-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 SMAJ6.5C-E3/5A?
For technical support, including SMAJ6.5C-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5C-E3/5A requirements.
6.How does Aetrix verify that SMAJ6.5C-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5C-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 SMAJ6.5C-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ6.5C-E3/5A?
All SMAJ6.5C-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5C-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 SMAJ6.5C-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ6.5C-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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