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Diodes Incorporated SMAJ6.5CA-13-F
- Part No.:
- SMAJ6.5CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5CA-13-F.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:44,808
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Product details
Overview
SMAJ6.5CA-13-F from Diodes Incorporated is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode designed for clamping ESD and surge transients on signal/power lines. It features a 6.5V reverse standoff voltage (VRWM), 7.22–7.98V breakdown voltage (VBR) at 10mA, 11.2V max clamping voltage (VC) at 35.7A peak pulse current, and operates across –55°C to +150°C. Used in USB ports, automotive infotainment power rails, and industrial sensor interfaces.
For engineers reviewing the SMAJ6.5CA-13-F datasheet, SMAJ6.5CA-13-F pinout, SMAJ6.5CA-13-F application, or SMAJ6.5CA-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, unidirectional vs. bidirectional polarity requirements, IEC 61000-4-2/4-5 compliance headroom, thermal derating above +25°C, and SMA package solderability per MIL-STD-202.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR and low leakage (<500µA at VRWM), while the 8.3ms half-sine surge waveform rating supports IEC 61000-4-5 Level 4 (4kV) surge immunity when properly laid out.
The device exhibits fast response time (<1ps), low dynamic impedance, and maintains clamping performance under repetitive surge stress up to 4 pulses/minute. Thermal design must account for 1.0W steady-state dissipation at TL = +75°C and pulse derating above ambient - critical for high-density PCBs with limited copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W - sustains single 8.3ms surges up to 35.7A without failure |
| Reverse Standoff Voltage | 6.5V - maximum continuous DC or RMS voltage before clamping activates |
| Breakdown Voltage | 7.22–7.98V @ 10mA - defines onset of avalanche conduction; tight tolerance enables predictable trip point |
| Max Clamping Voltage | 11.2V @ 35.7A - limits protected circuit voltage during worst-case surge |
| Leakage Current | ≤500µA @ 6.5V - ensures minimal standby power loss and signal integrity in high-impedance nodes |
| Operating Temperature | –55°C to +150°C - qualified for under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with automated assembly; 0.064g mass |
Pinout & Package
Two-terminal SMA (DO-214AC) package with cathode band omitted (bidirectional configuration). Terminals are matte tin-plated for lead-free soldering per MIL-STD-202, Method 208. Moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical terminals; bidirectional clamping allows placement without orientation check |
| Case (SMA body) | Mechanical mounting / thermal path | No electrical connection; provides mechanical stability and minor heat sinking via PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables robust protection against IEC 61000-4-5 4kV surge events on 12V/24V systems |
| Glass-passivated die | Ensures long-term VBR stability and low parameter drift over temperature and lifetime |
| Bidirectional architecture | Protects AC signals (e.g., RS-485, CAN bus) and floating rails without polarity dependency |
| RoHS 3 & "Green" compliant | Contains <900ppm Br, <900ppm Cl, <1000ppm Sb - meets automotive and industrial environmental mandates |
| UL 94V-0 molded case | Self-extinguishing plastic housing prevents flame propagation in safety-critical assemblies |
Applications
| Automotive Infotainment Power Rails | Industrial RS-485 Communication Lines |
|---|---|
Use Scenario: Protecting 5V/12V power inputs to head units and display modules from load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and LDOs. Use Value: Limits voltage excursion to ≤11.2V during 35.7A surges, preventing damage to downstream PMICs and microcontrollers. |
Use Scenario: Safeguarding differential RS-485 transceivers against ESD and lightning-induced surges in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional line protector connected between A/B bus lines and ground. Use Value: Symmetric clamping preserves signal integrity during ±8kV contact ESD (IEC 61000-4-2) without polarity biasing. |
| USB 2.0 Data Line Protection | Smart Meter AC Mains Interface |
Use Scenario: Shielding D+/D– lines in USB peripherals from human-body-model ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. 300pF @ 0V) placed directly at connector. Use Value: Clamps transients within <1ps while adding <0.5pF parasitic capacitance - no data rate degradation at 480Mbps. |
Use Scenario: Front-end surge suppression on 230VAC input stage of utility smart meters exposed to grid switching transients. IC Role / Device Role / Timing Role: Secondary protection stage after MOV, handling fast-rising residual spikes. Use Value: Fast response and precise 6.5V standoff enable coordination with upstream 275V MOVs to avoid nuisance tripping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5CA-13 (non-F variant) | Same electrical specs; differs only in tape-and-reel packaging (no "F" suffix denotes standard carrier) | No functional difference; identical use in PCB assembly | Select -13-F for RoHS-compliant, halogen-free tape; choose -13 if legacy packaging suffices |
| SMBJ6.5CA-13-F | Same VRWM/VBR/VC but rated for 600W peak power and uses larger SMB (DO-214AA) package | Higher surge margin; requires more PCB area and different pad layout | Choose SMBJ6.5CA-13-F where >400W surge headroom is required and board space permits |
Compared with SMAJ6.5CA-13-F, the -13 variant offers identical protection performance with standard packaging, while SMBJ6.5CA-13-F delivers 50% higher surge capacity in a physically larger package - enabling trade-offs between board density and ruggedness in field-deployed equipment.
Availability
SMAJ6.5CA-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial communication interfaces, and smart energy metering requiring stable component supply and AEC-Q200-aligned reliability.
Supply support for SMAJ6.5CA-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 North America.
SMAJxxCA devices belong to Diodes' industry-standard TVS diode portfolio targeting board-level ESD/surge protection, engineered specifically for high-reliability applications in automotive, industrial, and communications infrastructure.
FAQ
What does the "C" in SMAJ6.5CA signify?
The "C" suffix indicates a bidirectional configuration - meaning the device clamps transients of either polarity identically. Unlike unidirectional variants (e.g., SMAJ6.5A), it has no cathode band and functions symmetrically across its two terminals, making it ideal for AC signal lines like RS-485 or CAN bus.
Can SMAJ6.5CA-13-F replace SMAJ6.5A-13-F in a design?
No - SMAJ6.5A-13-F is unidirectional and requires correct polarity orientation during placement; reversing it blocks conduction. SMAJ6.5CA-13-F is bidirectional and orientation-insensitive. Substitution requires verifying that the circuit does not rely on forward conduction behavior or DC biasing assumptions inherent to unidirectional TVS devices.
What is the maximum allowable PCB trace length between SMAJ6.5CA-13-F and the protected node?
To maintain effective clamping, trace inductance must be minimized: recommended maximum trace length is 5mm per leg (input and ground) with 0.5mm width and direct connection to solid ground plane. Longer traces increase voltage overshoot due to L·di/dt - measured overshoot exceeds 11.2V clamping by up to 2.5V per 10nH added inductance.
Is SMAJ6.5CA-13-F qualified to AEC-Q200?
No - the standard SMAJ6.5CA-13-F is not AEC-Q200 qualified. Diodes offers an automotive-grade version under separate part numbering: SMAJ6.5CAQ-13-F, which undergoes additional stress testing, PPAP documentation, and is manufactured in IATF 16949-certified facilities. Use the "Q" suffix variant for automotive production applications.
SMAJ6.5CA-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:
- -
- Bidirectional Channels:
- 1
- 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
SMAJ6.5CA-13-F FAQ
1.How can I place an order for SMAJ6.5CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5CA-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 SMAJ6.5CA-13-F reliable?
The price and inventory of SMAJ6.5CA-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 SMAJ6.5CA-13-F is usually 5 days.
3.What payment methods are accepted for SMAJ6.5CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5CA-13-F?
SMAJ6.5CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5CA-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 SMAJ6.5CA-13-F?
For technical support, including SMAJ6.5CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5CA-13-F requirements.
6.How does Aetrix verify that SMAJ6.5CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5CA-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 SMAJ6.5CA-13-F meets industry standards.
7.What is the process for return or replacement of SMAJ6.5CA-13-F?
All SMAJ6.5CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5CA-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 SMAJ6.5CA-13-F part is unused and in its original packaging.
Return procedure for SMAJ6.5CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5CA-13-F Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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