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Diodes Incorporated SMAJ6.5A-13
- Part No.:
- SMAJ6.5A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5A-13.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:9,839
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Product details
Overview
SMAJ6.5A-13 from Diodes Incorporated is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 6.5V reverse standoff voltage, 11.2V max clamping voltage at 35.7A peak pulse current, and operates from –55°C to +150°C - deployed in automotive body control modules, industrial PLC I/O ports, and USB power input stages.
For engineers reviewing the SMAJ6.5A-13 datasheet, SMAJ6.5A-13 pinout, SMAJ6.5A-13 application, or SMAJ6.5A-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VMAX, peak pulse current capability under IEC 61000-4-5 surge waveforms, unidirectional polarity alignment with DC bias, and SMA package thermal performance under sustained transient duty cycles.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its unidirectional configuration enables integration into positively biased supply rails without reverse leakage interference during normal operation.
The device complies with IEC 61000-4-2 (±30 kV contact), IEC 61000-4-5 (4 kV line-to-line, 6 kV line-to-earth), and meets AEC-Q101 stress requirements for automotive use. Clamping behavior is characterized at 10 mA test current with 300 µs rise time per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400 W - sustains single 8.3 ms half-sine surges up to 35.7 A without failure |
| Reverse Standoff Voltage | 6.5 V - maximum continuous DC voltage before significant leakage begins |
| Breakdown Voltage | 7.22–7.98 V @ 10 mA - ensures reliable triggering above nominal rail voltage |
| Max Clamping Voltage | 11.2 V @ 35.7 A - limits downstream IC stress to safe levels during surge events |
| Reverse Leakage | 500 µA @ 6.5 V - low enough to avoid loading 5 V/3.3 V logic rails |
| Operating Temperature | –55°C to +150°C - supports under-hood automotive and industrial ambient conditions |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, cathode band polarity indicator, and RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection | Connected to ground or return path; conducts during positive transients on cathode side |
| Cathode | High-side connection | Connected to protected line (e.g., 5 V rail); blocks reverse current in normal operation |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse rating | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV) without derating in compact SMA footprint |
| Glass-passivated die | Improves long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Fast response time | Sub-nanosecond clamping prevents transient energy from reaching sensitive downstream ICs |
| Unidirectional polarity | Eliminates reverse conduction risk in DC-biased applications like USB VBUS or CAN power rails |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protects microcontroller GPIO and LIN transceiver power pins from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping element placed between battery rail and local LDO input. Use Value: Limits transient voltage to ≤11.2 V, preserving 12 V-rated LDOs and preventing MCU brown-out resets. | Use Scenario: Shields 24 V digital input optocoupler front-end from field-wiring induced surges. IC Role / Device Role / Timing Role: First-stage overvoltage clamp ahead of series resistor and zener regulator. Use Value: Absorbs 400 W surge energy while maintaining <500 µA leakage at 24 V standby, minimizing false triggers. |
| USB Type-A Power Input | RS-485 Transceiver Power Rail |
Use Scenario: Guards 5 V VBUS line against hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS tied between VBUS and GND, adjacent to connector. Use Value: Clamps ±15 kV ESD (IEC 61000-4-2) to <11.2 V within <1 ns, protecting USB controller VDDIO. | Use Scenario: Secures isolated RS-485 transceiver VCC supply against ground loop transients. IC Role / Device Role / Timing Role: Low-capacitance TVS on secondary-side 5 V rail of isolated DC/DC converter. Use Value: Delivers 35.7 A peak current handling without degrading signal integrity due to minimal junction capacitance (~100 pF). |
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 | Bi-directional version; symmetric clamping for AC-coupled or floating lines | Required where bidirectional signal lines (e.g., RS-232, audio) need protection on both polarities | Select only if circuit lacks defined DC bias or handles bipolar signals |
| SMBJ6.5A-13 | Same electrical specs but SMB package (higher thermal mass, 600 W rating) | Better suited for high-reliability industrial systems requiring extended surge endurance | Choose when board layout allows larger footprint and higher power margin is needed |
Compared with SMAJ6.5CA-13, this unidirectional variant avoids unnecessary leakage on DC rails; versus SMBJ6.5A-13, it trades thermal robustness for space-constrained layouts where 400 W suffices and PCB real estate is limited.
Availability
SMAJ6.5A-13 is available at Aetrix Electronics and suitable for automotive infotainment power inputs, industrial sensor node DC rails, and USB-C accessory power management requiring stable component supply across multi-year production cycles.
Supply support for SMAJ6.5A-13 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 centers across Asia and manufacturing in China, Taiwan, and the U.S.
The SMAJ series belongs to Diodes' transient voltage suppressor portfolio, engineered specifically for high-energy surge immunity in automotive, industrial, and communications infrastructure applications where reliability under harsh EMC conditions is critical.
FAQ
What is the polarity configuration of SMAJ6.5A-13?
SMAJ6.5A-13 is a unidirectional TVS diode with cathode band marking. It conducts only during positive transients on the cathode terminal relative to anode, making it ideal for protecting positively biased DC rails such as 5 V or 12 V supplies. Bi-directional operation requires the SMAJ6.5CA-13 variant.
How does SMAJ6.5A-13 perform under repeated surge stress?
Per JEDEC testing, SMAJ6.5A-13 supports up to four 8.3 ms half-sine surges per minute at 25°C ambient. Derating applies above 25°C: at 75°C ambient, peak pulse power drops to ~250 W. It is not rated for repetitive surge duty without thermal recovery intervals.
Can SMAJ6.5A-13 be used in place of a Zener diode for overvoltage clamping?
No - SMAJ6.5A-13 is optimized for transient suppression, not regulation. Its breakdown occurs at 7.22–7.98 V (not 6.5 V), and it exhibits higher dynamic impedance than Zeners. For steady-state voltage limiting, a precision Zener or shunt regulator is required; SMAJ6.5A-13 functions only during short-duration surges.
Is SMAJ6.5A-13 compliant with automotive qualification standards?
Yes - SMAJ6.5A-13 meets AEC-Q101 stress test requirements for TVS diodes, including temperature cycling, humidity bias, and mechanical shock. Its –55°C to +150°C operating range and glass-passivated construction support under-hood and module-level deployment in qualified automotive ECUs.
SMAJ6.5A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAJ6.5A-13 FAQ
1.How can I place an order for SMAJ6.5A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5A-13 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 reliable?
The price and inventory of SMAJ6.5A-13 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 is usually 5 days.
3.What payment methods are accepted for SMAJ6.5A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5A-13?
SMAJ6.5A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5A-13 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?
For technical support, including SMAJ6.5A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5A-13 requirements.
6.How does Aetrix verify that SMAJ6.5A-13 is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5A-13 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 meets industry standards.
7.What is the process for return or replacement of SMAJ6.5A-13?
All SMAJ6.5A-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5A-13, 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 part is unused and in its original packaging.
Return procedure for SMAJ6.5A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5A-13 Tags
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Diodes Incorporated
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