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Diodes Incorporated SMAJ6.5A-13-F
- Part No.:
- SMAJ6.5A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5A-13-F.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:199,094
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Product details
Overview
SMAJ6.5A-13-F from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal paths. It features a 6.5V reverse standoff voltage, 7.22–7.98V breakdown range at 10mA, 11.2V max clamping voltage at 35.7A peak pulse current, and SMA package with cathode band polarity marking.
For engineers reviewing the SMAJ6.5A-13-F datasheet, SMAJ6.5A-13-F pinout, SMAJ6.5A-13-F application, or SMAJ6.5A-13-F equivalent, key selection criteria include clamping ratio (VC/VRWM ≈ 1.72), low leakage (<500µA @ 6.5V), fast response time, RoHS-compliant matte tin plating, and IATF 16949-manufactured automotive-grade availability (SMAJ6.5AQ variant).
Technical Context
This TVS diode operates as a clamping-type surge protector, conducting above its breakdown voltage to limit transient energy to downstream circuitry. Its glass-passivated die ensures stable VBR tolerance and robust surge handling under 8.3ms half-sine pulses.
Thermal performance is defined by a -55°C to +150°C operating junction temperature range and 1.0W steady-state power dissipation at TL = +75°C. Derating follows a linear curve above ambient, with peak pulse power maintained at 400W only up to +25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - Sustains single 8.3ms surges without failure; derates linearly above +25°C ambient. |
| Reverse Standoff Voltage | 6.5V - Maximum continuous DC or RMS voltage before significant leakage; sets minimum system operating margin. |
| Breakdown Voltage | 7.22–7.98V @ 10mA - Confirmed conduction onset; tight 10.5% tolerance enables precise overvoltage thresholding. |
| Max Clamping Voltage | 11.2V @ 35.7A - Limits transient voltage seen by protected ICs; clamping ratio of 1.72 supports 3.3V/5V rail protection. |
| Peak Pulse Current | 35.7A - Withstands IEC 61000-4-5 Level 4 (4kV/2Ω) surges when properly routed and decoupled. |
| Leakage Current | <500µA @ VRWM - Minimizes standby power loss and avoids false triggering in low-power sensor circuits. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, 0.064g mass, and cathode band polarity indicator for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to ground or low-impedance reference; completes clamping loop during transients. |
| Cathode | Protected line input | Connected to line being protected (e.g., VBUS, RS-485 A/B); blocks reverse leakage below VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Ensures stable VBR over temperature and lifetime; eliminates moisture-induced parameter drift in humid environments. |
| 400W peak pulse rating | Supports IEC 61000-4-5 surge immunity up to 4kV (2Ω source) without degradation after single-event stress. |
| RoHS-compliant matte tin plating | Enables lead-free reflow compatibility (per MIL-STD-202, Method 208) and eliminates whisker risk in high-reliability assemblies. |
| Moisture sensitivity Level 1 | Eliminates bake requirements prior to assembly; safe for standard SMT production without dry pack or floor life constraints. |
Applications
| USB Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protects 5V USB VBUS line from ESD and load dump transients in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between connector and DC-DC input filter. Use Value: Clamps 8kV contact ESD to <11.2V within <1ns, preventing latch-up or damage to USB controller and PMIC. |
Use Scenario: Safeguards LIN bus transceiver and microcontroller I/O pins against battery reverse connection and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12V supply rail feeding BCM sub-circuits. Use Value: Limits 100V load dump transients to ≤11.2V for <100ms, preserving MCU reset logic and EEPROM integrity. |
| Industrial Sensor Interface | Smart Meter Communication Port |
Use Scenario: Shields 4–20mA analog input stage from induced lightning surges on long field wiring. IC Role / Device Role / Timing Role: First-stage protection ahead of precision op-amp and ADC front-end. Use Value: Maintains <500µA leakage at 6.5V to avoid gain error; clamps 1kV/0.5Ω surge to protect 24-bit sigma-delta ADC. |
Use Scenario: Secures RS-485 transceiver pins in utility meters exposed to grid switching transients and EFT bursts. IC Role / Device Role / Timing Role: Line-side TVS on A/B differential pair and VCC rail. Use Value: Provides bidirectional-capable alternative (SMAJ6.5CA) with matched clamping symmetry for balanced data line protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5CA-13-F | Bidirectional version; identical VRWM, VBR, VC, and IPP but symmetrical clamping for AC or differential lines. | Required for RS-485, CAN, or Ethernet PHY protection where polarity reversal or AC coupling exists. | Select SMAJ6.5CA for balanced signal lines; SMAJ6.5A remains optimal for DC rail or unidirectional I/O. |
| SMBJ6.5A-13-F | Same electrical specs but SMB (DO-214AA) package; 600W PPK rating and 1.5x larger footprint. | Used where higher surge margin or legacy PCB layout requires SMB pad compatibility. | Choose SMBJ6.5A only if board space allows larger package and 600W headroom is required beyond 400W design target. |
Compared with SMAJ6.5CA-13-F and SMBJ6.5A-13-F, SMAJ6.5A-13-F offers optimal space efficiency for unidirectional DC protection while maintaining industry-standard clamping performance and automotive-qualified variants.
Availability
SMAJ6.5A-13-F is available at Aetrix Electronics and suitable for USB power delivery systems, automotive body electronics, industrial sensor interfaces, and smart meter communication ports requiring stable component supply and full traceability.
Supply support for SMAJ6.5A-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
This device belongs to Diodes' SMAJ series of surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in automotive, industrial, and consumer power and interface applications.
FAQ
What is the maximum clamping voltage for SMAJ6.5A-13-F at its rated peak pulse current?
The maximum clamping voltage is 11.2V at 35.7A peak pulse current (IPP), measured using an 8.3ms half-sine waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (-55°C to +150°C) and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMAJ6.5A-13-F suitable for automotive applications?
Yes - the standard SMAJ6.5A-13-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation. For AEC-Q101 qualified versions, Diodes offers the pin- and form-compatible SMAJ6.5AQ-13-F, which undergoes additional stress testing including HTGB, TCT, and surge validation per automotive requirements.
How does the SMA package compare to SMB in thermal performance?
The SMA package has a lower thermal resistance than SMB due to smaller die attach area and shorter internal thermal path, resulting in a 1.0W steady-state power rating at TL = +75°C versus 1.5W for SMBJ. However, SMA's 400W peak pulse rating is sufficient for most IEC 61000-4-2/4-5 applications where pulse duration is short and heat accumulation is negligible.
Can SMAJ6.5A-13-F be used in bidirectional signal lines like RS-485?
No - SMAJ6.5A-13-F is unidirectional and conducts only when cathode is positive relative to anode. For RS-485, CAN, or other bidirectional interfaces, the SMAJ6.5CA-13-F variant must be used, as it provides symmetrical clamping in both polarities and matches the same electrical parameters except for polarity behavior.
SMAJ6.5A-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- 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:
- SMA
SMAJ6.5A-13-F FAQ
1.How can I place an order for SMAJ6.5A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5A-13-F 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-13-F reliable?
The price and inventory of SMAJ6.5A-13-F 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-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ6.5A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5A-13-F?
SMAJ6.5A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5A-13-F 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-13-F?
For technical support, including SMAJ6.5A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5A-13-F requirements.
6.How does Aetrix verify that SMAJ6.5A-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5A-13-F 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-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ6.5A-13-F?
All SMAJ6.5A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5A-13-F, 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-13-F part is unused and in its original packaging.
Return procedure for SMAJ6.5A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5A-13-F Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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