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Toshiba Semiconductor and Storage DF3A6.8LCT,L3F
- Part No.:
- DF3A6.8LCT,L3F
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- SC-101, SOT-883
- Datasheet:
-
DF3A6.8LCT,L3F.pdf
- Description:
- TVS DIODE CST3
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
DF3A6.8LCT from TOSHIBA is a dual-cathode ESD protection diode designed for high-speed data lines, featuring 6.8 V Zener voltage (IZ = 5 mA), ±8 kV IEC61000-4-2 contact discharge immunity, and low 6.0 pF terminal capacitance at 1 MHz - deployed in USB 2.0, HDMI, and audio interface circuits.
For engineers reviewing the DF3A6.8LCT datasheet, DF3A6.8LCT pinout, DF3A6.8LCT application, or DF3A6.8LCT equivalent, key selection criteria include ESD robustness, low clamping voltage, signal integrity preservation via minimal capacitance, and compatibility with space-constrained CSP packages.
Technical Context
This device implements a dual-cathode, single-anode configuration (CATHODE1/CATHODE2/ANODE) optimized for bidirectional ESD suppression on differential or independent signal lines. It operates exclusively as a transient voltage suppressor - not a voltage regulator - with no DC biasing function beyond clamping.
Its electrical behavior is defined by Zener breakdown at 6.8 V (±0.3 V), dynamic impedance ≤50 Ω, reverse leakage ≤0.5 μA at 5 V, and junction temperature limit of 150°C - all validated under JEITA package code 1-1S1S (CST3).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 6.8 V at IZ = 5 mA - defines clamping threshold for ESD transients on protected lines |
| ESD immunity | ±8 kV per IEC61000-4-2 contact discharge - meets industrial-grade system-level ESD requirements |
| Terminal capacitance | 6.0 pF at VR = 0 V, f = 1 MHz - preserves signal integrity on high-speed interfaces up to ~300 Mbps |
| Dynamic impedance | ≤50 Ω at IZ = 5 mA - ensures low-voltage overshoot during fast ESD events |
| Power dissipation | 150 mW on FR4 (10 mm × 10 mm × 1 mm) - sets thermal derating boundary for PCB layout |
| Reverse leakage | ≤0.5 μA at VR = 5 V - minimizes standby current impact on low-power signal paths |
Pinout & Package
DF3A6.8LCT uses the CST3 (JEITA 1-1S1S) ultra-small surface-mount package (1.0 mm × 0.6 mm × 0.35 mm), weighing 0.75 mg. Its three-terminal structure supports dual-line protection in a single footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode 1 | ESD current sink for first protected signal line (e.g., USB D+) |
| 2 | Cathode 2 | ESD current sink for second protected signal line (e.g., USB D−) |
| 3 | Anode | Common return path to ground or low-impedance reference plane |
Key Features
| Feature | Design Value |
|---|---|
| Dual-cathode architecture | Enables independent ESD protection of two signal lines without cross-talk or shared clamping path |
| Low 6.0 pF capacitance | Maintains signal rise/fall times and eye diagram integrity on USB 2.0 and I²C buses |
| ±8 kV IEC61000-4-2 rating | Meets end-equipment compliance for consumer and industrial portable electronics |
| 150 mW power rating | Supports transient energy absorption without thermal runaway on standard FR4 layouts |
Applications
| USB 2.0 Interface Protection | HDMI Data Lane Protection |
|---|---|
Use Scenario: Protecting differential USB 2.0 D+/D− lines from human-body-model ESD events during plug/unplug cycles. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed directly at connector entry point. Use Value: Prevents latch-up or permanent damage to USB transceivers while adding <0.1 ns propagation delay due to 6.0 pF capacitance. | Use Scenario: Safeguarding HDMI TMDS clock and data channels against contact ESD in display docking stations. IC Role / Device Role / Timing Role: Low-capacitance clamp on each TMDS pair, referenced to common ground plane. Use Value: Enables full 1080p60 transmission without pixel corruption or link training failure caused by ESD-induced jitter. |
| Smartphone Audio Jack | Industrial Sensor Interface |
Use Scenario: ESD hardening of 3.5 mm TRRS audio jack mic and headset lines exposed to frequent handling. IC Role / Device Role / Timing Role: Dual-path suppressor isolating microphone bias and stereo output paths from shared anode return. Use Value: Eliminates pop/click artifacts and ADC saturation during ESD events, preserving analog audio fidelity. | Use Scenario: Protecting RS-485 or CAN FD transceiver I/O pins in factory-floor PLC modules subject to maintenance personnel discharge. IC Role / Device Role / Timing Role: Point-of-entry clamping device before TVS array or isolation barrier. Use Value: Reduces field failure rate by preventing gate oxide rupture in transceiver ICs during routine servicing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR | Single-channel, 5.5 V VBR, 12 pF capacitance, SOT-553 package | Higher capacitance limits use to ≤100 Mbps interfaces; smaller package requires tighter placement tolerance | Prefer when only one line needs protection and board area is critical |
| ESD9X5.0ST5G | Dual-cathode, 5.0 V VBR, 35 pF capacitance, SOD-523 package | Lower clamping voltage but higher capacitance degrades signal integrity on >10 Mbps links | Select for cost-sensitive 5 V logic rails where speed is secondary to ESD margin |
Compared with TPD2E001DRYR and ESD9X5.0ST5G, DF3A6.8LCT delivers optimal balance of low capacitance (6.0 pF), precise 6.8 V clamping, and dual-line integration - making it preferred for high-speed differential interfaces where both bandwidth and ESD margin must be simultaneously maintained.
Availability
DF3A6.8LCT is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI data lane hardening, and smartphone audio jack ESD mitigation requiring stable component supply across production lifecycles through 2026.
Supply support for DF3A6.8LCT 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
Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and logic ICs for industrial, automotive, and consumer systems.
DF3A6.8LCT belongs to Toshiba's ESD protection diode product line, engineered specifically for high-fidelity signal path protection in portable and interface-dense electronics - prioritizing low capacitance, repeatable clamping, and compact packaging.
FAQ
What is the primary function of DF3A6.8LCT?
DF3A6.8LCT is a dedicated ESD protection diode - not a voltage regulator or general-purpose Zener. Its sole function is to clamp electrostatic discharge transients on signal lines, with guaranteed ±8 kV IEC61000-4-2 immunity and 6.8 V Zener voltage at 5 mA. DF3A6.8LCT must not be used for constant-voltage regulation or DC biasing.
What does the "LCT" suffix indicate in DF3A6.8LCT?
The "LCT" suffix denotes Toshiba's low-capacitance variant within the DF3A series, specifying 6.0 pF terminal capacitance at 0 V and 1 MHz - a key differentiator for high-speed interface protection. DF3A6.8LCT is distinct from standard DF3A6.8 variants with higher capacitance, and this value is measured between cathode and anode terminals.
Can DF3A6.8LCT be used on 3.3 V logic lines?
Yes - DF3A6.8LCT is rated for 6.8 V Zener voltage at 5 mA, providing safe margin above 3.3 V rail operation while clamping ESD spikes well below IC damage thresholds. Its low 0.5 μA reverse leakage at 5 V ensures negligible loading on 3.3 V signal paths, and DF3A6.8LCT has been validated in 3.3 V USB and I²C designs.
What is the package type and size of DF3A6.8LCT?
DF3A6.8LCT uses the CST3 package (JEITA code 1-1S1S), measuring 1.0 mm × 0.6 mm × 0.35 mm with a typical weight of 0.75 mg. This ultra-compact chip-scale package enables placement directly at connectors or IC pads without consuming significant PCB area - a critical feature for modern mobile and wearable electronics using DF3A6.8LCT.
Is DF3A6.8LCT RoHS compliant?
Yes, DF3A6.8LCT complies with the EU RoHS Directive and contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). RoHS compliance is confirmed in Toshiba's official environmental documentation, and DF3A6.8LCT is suitable for use in consumer and industrial products sold in regulated markets.
DF3A6.8LCT,L3F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package/Case:
- SC-101, SOT-883
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- 6.5V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 6pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- CST3
DF3A6.8LCT,L3F FAQ
1.How can I place an order for DF3A6.8LCT,L3F through Aetrix?
Please submit a Request for Quotation (RFQ) for DF3A6.8LCT,L3F 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 DF3A6.8LCT,L3F reliable?
The price and inventory of DF3A6.8LCT,L3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF3A6.8LCT,L3F is usually 5 days.
3.What payment methods are accepted for DF3A6.8LCT,L3F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF3A6.8LCT,L3F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF3A6.8LCT,L3F?
DF3A6.8LCT,L3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF3A6.8LCT,L3F 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 DF3A6.8LCT,L3F?
For technical support, including DF3A6.8LCT,L3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF3A6.8LCT,L3F requirements.
6.How does Aetrix verify that DF3A6.8LCT,L3F is sourced from the original manufacturer or authorized distributors?
All DF3A6.8LCT,L3F 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 DF3A6.8LCT,L3F meets industry standards.
7.What is the process for return or replacement of DF3A6.8LCT,L3F?
All DF3A6.8LCT,L3F units undergo pre-shipment inspection (PSI). If there is an issue with DF3A6.8LCT,L3F, 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 DF3A6.8LCT,L3F part is unused and in its original packaging.
Return procedure for DF3A6.8LCT,L3F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DF3A6.8LCT,L3F Tags
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