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Toshiba Semiconductor and Storage DF3A6.8LFU,LF
- Part No.:
- DF3A6.8LFU,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
DF3A6.8LFU,LF.pdf
- Description:
- TVS DIODE 5VWM USM
- Quantity:
- Payment:
- Shipping:
Inventory:2,875
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Product details
Overview
DF3A6.8LFU from TOSHIBA is a dual-channel ESD protection diode array designed for high-speed data lines, featuring 6.8 V Zener voltage (IZ = 5 mA), 6.0 pF typical terminal capacitance, and ±8 kV IEC61000-4-2 contact discharge immunity - deployed in USB 2.0, HDMI, and audio jack interfaces.
For engineers reviewing the DF3A6.8LFU datasheet, DF3A6.8LFU pinout, DF3A6.8LFU application, or DF3A6.8LFU equivalent, key selection criteria include low-capacitance transient suppression, dual-diode configuration in ultra-compact SOT-323 package, and strict ESD-only usage compliance per Toshiba's safety restrictions.
Technical Context
This device implements two independent Zener-type ESD clamps in a single SOT-323 package, each with a nominal 6.8 V breakdown voltage and sub-6 pF capacitance to preserve signal integrity on high-frequency lines. It operates exclusively as a transient voltage suppressor - not as a voltage regulator or constant-voltage reference.
The DF3A6.8LFU meets IEC61000-4-2 Level 4 (±8 kV contact) without functional degradation, with guaranteed non-latching behavior under ESD stress. Its 100 mW power dissipation rating and 125°C junction temperature limit define safe operating boundaries for short-duration pulse events only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage VZ | 6.8 V (typ.) at 5 mA - sets precise clamping threshold for protecting 5 V logic and interface lines |
| Terminal capacitance CT | 6.0 pF (typ.) at 0 V, 1 MHz - enables use on USB 2.0 (480 Mbps) and audio differential pairs without signal distortion |
| ESD immunity | ±8 kV contact discharge (IEC61000-4-2) - meets industrial and consumer end-equipment surge requirements |
| Power dissipation P | 100 mW - supports single-pulse ESD events; not rated for continuous power handling |
| Junction temperature Tj | 125°C maximum - defines thermal derating envelope for PCB layout near heat sources |
| Reverse leakage IR | ≤0.5 μA at 5 V - ensures minimal standby current impact on battery-powered sensor nodes |
Pinout & Package
DF3A6.8LFU uses the SOT-323 (SC-70) 3-pin surface-mount package, measuring 2.0 × 2.1 × 0.9 mm. Pin 1 and Pin 2 are cathodes of two independent Zener diodes; Pin 3 is the common anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode of Diode 1 | Connected to protected signal line (e.g., USB D+); clamps positive transients to common anode |
| Pin 2 | Cathode of Diode 2 | Connected to second protected signal line (e.g., USB D−); enables dual-line bidirectional protection |
| Pin 3 | Common Anode | Biased to VCC or ground depending on system topology; determines clamping polarity and reference level |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel ESD protection | Two independent 6.8 V Zener clamps in one SOT-323 footprint - reduces board area vs. discrete diodes |
| Low signal-line capacitance | 6.0 pF typ. - preserves rise time and eye diagram integrity on 480 Mbps USB 2.0 links |
| IEC61000-4-2 Level 4 compliance | ±8 kV contact discharge - satisfies EN 55032/55035 and FCC Part 15 Class B system-level EMI requirements |
| ESD-only functional scope | No DC regulation capability - prevents misuse as Zener reference or voltage clamp in steady-state bias circuits |
Applications
| USB 2.0 Interface Protection | HDMI Hot-Plug Detection Line |
|---|---|
Use Scenario: Protecting D+ and D− differential pair against human-body-model ESD during cable insertion/removal in portable peripherals. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor - clamps fast-rising ESD pulses while adding <6 pF loading to maintain 480 Mbps eye margin. Use Value: Prevents latch-up or permanent damage to USB PHY transceivers without degrading signal integrity or requiring additional series impedance. | Use Scenario: Safeguarding HDMI HPD (Hot Plug Detect) line from ±8 kV contact discharge in AV receivers and set-top boxes. IC Role / Device Role / Timing Role: Unidirectional Zener clamp referenced to 5 V rail - ensures HPD logic remains valid during plug-in events. Use Value: Eliminates false HPD toggling and display blackouts caused by ESD-induced voltage spikes on the 5 V-tolerant HPD input. |
| Smartphone Audio Jack | Industrial Sensor Interface |
Use Scenario: Shielding microphone and headset detection lines in 3.5 mm TRRS jacks from user-hand ESD in handheld devices. IC Role / Device Role / Timing Role: Dual-channel low-capacitance clamp - protects both MIC and SENSE lines simultaneously with matched VZ and CT. Use Value: Maintains analog audio fidelity and accurate accessory detection while meeting IEC 61000-4-2 Level 4 without added RC filtering. | Use Scenario: Securing RS-485 transceiver A/B lines in factory-floor PLC I/O modules exposed to maintenance personnel ESD. IC Role / Device Role / Timing Role: Ground-referenced bidirectional ESD shunt - clamps transients between differential pair and chassis ground. Use Value: Enables robust field deployment without external TVS arrays, reducing BOM count and assembly cost in space-constrained DIN-rail enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor ESD9X5.0ST5G | 5.0 V VZ, 12 pF CT, SOT-523 package | Higher capacitance limits use to ≤100 Mbps lines; lower clamping voltage suits 3.3 V I/O | Select when protecting 3.3 V logic with relaxed bandwidth needs and tighter VZ tolerance required |
| Vishay VEML6030X01 | Not applicable - optical ambient light sensor, unrelated function | N/A - incorrect product category | Avoid: misidentified part; no ESD protection capability |
Compared with DF3A6.8LFU, ESD9X5.0ST5G offers lower clamping voltage but doubles capacitance, making it unsuitable for USB 2.0; no valid alternative matches DF3A6.8LFU's 6.8 V / 6 pF / dual-channel SOT-323 combination - verify cross-reference before substitution.
Availability
DF3A6.8LFU is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI hot-plug detection, and smartphone audio jack ESD hardening requiring stable component supply across industrial and consumer production programs.
Supply support for DF3A6.8LFU 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 with emphasis on reliability, miniaturization, and application-specific performance.
The DF3A6.8LFU belongs to Toshiba's DF-series ESD protection diode family, engineered specifically for ultra-low-capacitance, dual-channel transient suppression in high-speed digital and analog interfaces.
FAQ
What is the primary function of the DF3A6.8LFU?
The DF3A6.8LFU is a dual-channel ESD protection diode array designed exclusively for electrostatic discharge suppression on high-speed signal lines. It is not intended for voltage regulation, constant-current operation, or any DC bias application. Its 6.8 V Zener voltage and 6.0 pF capacitance make DF3A6.8LFU suitable for safeguarding USB 2.0, HDMI, and audio interfaces against ±8 kV IEC61000-4-2 contact discharge events.
Can DF3A6.8LFU be used as a Zener voltage reference?
No - the DF3A6.8LFU is explicitly restricted to ESD protection only, as stated in Toshiba's documentation. Its Zener voltage specification (6.5–7.1 V) applies only under transient pulse conditions, not steady-state DC operation. Using DF3A6.8LFU as a voltage reference risks premature failure and violates Toshiba's usage restrictions. For precision voltage references, select purpose-built Zener ICs with specified DC stability and temperature coefficients.
What package type does DF3A6.8LFU use, and how are its pins configured?
DF3A6.8LFU uses the SOT-323 (SC-70) 3-pin package. Pin 1 and Pin 2 serve as independent cathodes for two Zener diodes; Pin 3 is their shared anode. This configuration enables bidirectional clamping when the common anode is grounded or connected to a DC rail. The compact 2.0 × 2.1 × 0.9 mm footprint allows dense placement near connectors without compromising signal path length.
Does DF3A6.8LFU meet automotive-grade reliability standards?
No - DF3A6.8LFU is not qualified to AEC-Q200 or any automotive stress test standard. Toshiba explicitly prohibits its use in automotive systems, nuclear facilities, aerospace equipment, or Class 3 medical devices. DF3A6.8LFU is rated for commercial and industrial environments only, with a storage temperature range of −55°C to +125°C and junction limit of 125°C under pulsed ESD conditions.
How does DF3A6.8LFU differ from single-diode ESD protectors like DF2S6.8MCT?
DF3A6.8LFU integrates two independent 6.8 V Zener clamps in one SOT-323 package, enabling simultaneous protection of differential pairs (e.g., USB D+/D−) with matched electrical characteristics. In contrast, DF2S6.8MCT is a single-diode device in SOD-523, requiring two placements for dual-line protection. DF3A6.8LFU reduces PCB area, assembly cost, and parasitic mismatch - critical for high-speed interface integrity where DF3A6.8LFU's 6.0 pF capacitance and tight VZ tolerance provide measurable advantage.
DF3A6.8LFU,LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- USM
DF3A6.8LFU,LF FAQ
1.How can I place an order for DF3A6.8LFU,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for DF3A6.8LFU,LF 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 DF3A6.8LFU,LF reliable?
The price and inventory of DF3A6.8LFU,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF3A6.8LFU,LF is usually 5 days.
3.What payment methods are accepted for DF3A6.8LFU,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF3A6.8LFU,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF3A6.8LFU,LF?
DF3A6.8LFU,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF3A6.8LFU,LF 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 DF3A6.8LFU,LF?
For technical support, including DF3A6.8LFU,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF3A6.8LFU,LF requirements.
6.How does Aetrix verify that DF3A6.8LFU,LF is sourced from the original manufacturer or authorized distributors?
All DF3A6.8LFU,LF 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 DF3A6.8LFU,LF meets industry standards.
7.What is the process for return or replacement of DF3A6.8LFU,LF?
All DF3A6.8LFU,LF units undergo pre-shipment inspection (PSI). If there is an issue with DF3A6.8LFU,LF, 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 DF3A6.8LFU,LF part is unused and in its original packaging.
Return procedure for DF3A6.8LFU,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DF3A6.8LFU,LF Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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ESD5Z3.3T1G
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D5V0H1B2LP-7B
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DESD5V0U1BA-7
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ESD5Z5.0T1G
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D12V0L1B2LP-7B
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PESD2V0Y1BSFYL
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DF2S5M4CT,L3F
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D5V0L1B2WS-7
Diodes Incorporated
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