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Toshiba Semiconductor and Storage DF3A6.2LFU,LF
- Part No.:
- DF3A6.2LFU,LF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- TVS Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
DF3A6.2LFU,LF.pdf
- Description:
- LOW CAPACITANCE ESD PROTECTION D
- Quantity:
- Payment:
- Shipping:
Inventory:5,335
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Product details
Overview
DF3A6.2LFU,LF from Toshiba is a dual-channel ESD protection diode array designed for high-speed data lines in portable electronics. It provides ±8 kV IEC61000-4-2 contact discharge immunity, 6.5 pF typical terminal capacitance, and 6.2 V nominal zener voltage at 5 mA, enabling robust transient suppression on USB, HDMI, or audio interfaces without signal integrity degradation.
For engineers reviewing the DF3A6.2LFU,LF datasheet, DF3A6.2LFU,LF pinout, DF3A6.2LFU,LF application, or DF3A6.2LFU,LF equivalent, key selection criteria include low-capacitance bidirectional clamping, ultra-compact 1.6 × 1.0 mm SOT-323-3L package, guaranteed ESD immunity level, thermal derating compliance, and strict limitation to ESD-only use per Toshiba's specification.
Technical Context
The DF3A6.2LFU,LF integrates two identical ESD protection elements in a single ultra-small surface-mount package, each configured as a bidirectional zener clamp with symmetrical breakdown characteristics. Its design targets high-frequency signal paths where parasitic capacitance must remain below 7 pF to avoid data rate degradation.
It operates exclusively as a transient voltage suppressor - not a voltage regulator - with no DC biasing requirement and no specified dynamic impedance minimum, only a maximum of 50 Ω at 5 mA. The device lacks integrated series resistance or RC filtering and relies solely on junction capacitance and avalanche clamping behavior for protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 6.2 V (nominal clamping voltage at 5 mA; defines turn-on threshold for ESD transients) |
| Terminal capacitance (CT) | 6.5 pF (typ. at 0 V, 1 MHz; enables use on USB 2.0 and audio lines without signal distortion) |
| ESD immunity | ±8 kV (IEC61000-4-2 contact discharge; meets industrial-grade interface protection requirements) |
| Power dissipation (P) | 100 mW (max. steady-state limit; requires thermal derating above 25°C ambient) |
| Junction temperature (Tj) | 125 °C (absolute max operating temperature; constrains placement near heat sources) |
| Reverse current (IR) | 2.5 μA (max. at 5 V reverse bias; ensures minimal leakage in standby signal paths) |
Pinout & Package
DF3A6.2LFU,LF is housed in a 3-pin SOT-323-3L package (1.6 × 1.0 × 0.9 mm), with pin 1 and pin 3 serving as independent cathodes and pin 2 as the common anode. This configuration supports dual-line bidirectional protection in a single footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Channel A) | Clamps positive transients to common anode; connects to protected signal line A |
| Pin 2 | Common Anode | Reference node tied to system ground or local return; shared by both protection channels |
| Pin 3 | Cathode (Channel B) | Clamps positive transients to common anode; connects to protected signal line B |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel ESD protection | Two independent 6.2 V clamps in one SOT-323-3L package, reducing PCB area and assembly cost vs. discrete diodes |
| Low terminal capacitance | 6.5 pF typ. ensures <1% signal rise-time degradation on 480 Mbps USB 2.0 differential pairs |
| Guaranteed ±8 kV ESD immunity | Validated per IEC61000-4-2 contact discharge test; no functional failure or parametric shift post-test |
| ESD-only functional scope | Explicitly prohibited for constant-voltage regulation or DC power applications per Toshiba documentation |
Applications
| USB 2.0 Data Lines | HDMI DDC/CEC Lines |
|---|---|
Use Scenario: Protecting differential USB 2.0 D+ and D− signals against human-body-model ESD events during cable insertion. IC Role / Device Role / Timing Role: Bidirectional transient voltage clamp placed directly at connector, with common anode grounded. Use Value: 6.5 pF capacitance avoids violating USB 2.0 eye diagram mask; ±8 kV rating exceeds IEC compliance margin. | Use Scenario: Safeguarding HDMI DDC clock/data and CEC control lines from electrostatic discharge during hot-plug events. IC Role / Device Role / Timing Role: Dual-channel low-capacitance clamp isolating two low-speed control buses sharing one ground reference. Use Value: Dual-element integration eliminates need for two separate SOT-23 devices, saving 1.2 mm² board space. |
| Smartphone Audio Jacks | Industrial Sensor Interface Lines |
Use Scenario: Shielding 3.5 mm TRRS audio jack contacts (mic, left/right, ground) from ESD during user handling. IC Role / Device Role / Timing Role: Two-channel clamp protecting mic input and stereo output lines referenced to common ground plane. Use Value: Sub-7 pF capacitance prevents high-frequency roll-off in 20 kHz audio band; small size fits tight connector layout. | Use Scenario: Hardening analog sensor outputs (e.g., 4–20 mA loop or thermocouple) against field-induced ESD in factory environments. IC Role / Device Role / Timing Role: Low-leakage (≤2.5 μA) bidirectional clamp on unidirectional analog lines referenced to system ground. Use Value: 125 °C max junction temperature supports operation near motor drives or PLC enclosures without thermal shutdown. |
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 clamping, 3.5 pF capacitance, SOT-553 package | Lower capacitance but requires two devices for dual-line protection; smaller footprint per channel only | Select when signal bandwidth >1 GHz or board space permits separate placement |
| ESD5Z6.0T5G | Single-channel, 6.0 V clamping, 12 pF capacitance, SOD-523 package | Higher capacitance limits use to ≤100 Mbps lines; lower cost but reduced high-speed suitability | Select for cost-sensitive industrial controls where data rate <10 Mbps |
Compared with TPD2E001DRYR and ESD5Z6.0T5G, the DF3A6.2LFU,LF uniquely delivers dual-channel 6.2 V clamping in a single 1.6 × 1.0 mm package with 6.5 pF capacitance - balancing high-speed compatibility, integration density, and IEC61000-4-2 compliance without requiring layout duplication or bandwidth compromise.
Availability
DF3A6.2LFU,LF is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI control bus hardening, and smartphone audio jack ESD mitigation requiring stable component supply across production lifecycles through April 2026.
Supply support for DF3A6.2LFU,LF 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 efficiency, miniaturization, and reliability for consumer, industrial, and automotive systems.
The DF3A6.2LFU,LF belongs to Toshiba's DF-series ESD protection diode family, engineered specifically for ultra-compact, low-capacitance transient suppression on high-speed digital and analog signal lines in space-constrained portable electronics.
FAQ
What is the primary function of the DF3A6.2LFU,LF?
The DF3A6.2LFU,LF is a dual-channel ESD protection diode array designed exclusively for electrostatic discharge suppression on high-speed signal lines. It is not rated or intended for voltage regulation, constant-current operation, or any DC power-related function. Its clamping action activates only during transient overvoltage events, with a nominal 6.2 V breakdown voltage at 5 mA. Toshiba explicitly restricts the DF3A6.2LFU,LF to ESD-only use per its product documentation.
Does the DF3A6.2LFU,LF support bidirectional signal lines like USB D+ and D−?
Yes, the DF3A6.2LFU,LF supports bidirectional signal protection via its symmetrical zener structure: each channel clamps both positive and negative transients relative to the common anode (Pin 2). This makes it suitable for full-duplex, AC-coupled interfaces such as USB 2.0 differential pairs. The DF3A6.2LFU,LF achieves this with matched 6.2 V clamping in both directions and 6.5 pF capacitance - critical for maintaining signal integrity on such lines.
What is the package type and pin configuration of the DF3A6.2LFU,LF?
The DF3A6.2LFU,LF uses a SOT-323-3L package measuring 1.6 × 1.0 × 0.9 mm. Pin 1 and Pin 3 are independent cathodes for Channel A and Channel B respectively; Pin 2 is the common anode, typically connected to system ground. This three-terminal configuration enables dual-line protection without external components. The DF3A6.2LFU,LF marking "BU" appears on the top surface per Toshiba's standard orientation diagram.
Can the DF3A6.2LFU,LF be used in automotive applications?
No - the DF3A6.2LFU,LF is not qualified for automotive use. Toshiba explicitly states that the DF3A6.2LFU,LF is unsuitable for systems requiring extraordinarily high reliability, including automotive equipment, and prohibits its use in such contexts. Its 125 °C maximum junction temperature and ±8 kV ESD rating meet industrial and consumer standards but do not satisfy AEC-Q200 stress testing or automotive qualification requirements. Use only in non-safety-critical portable or industrial electronics.
How does the DF3A6.2LFU,LF compare to standard Zener diodes in ESD protection roles?
Unlike general-purpose Zener diodes, the DF3A6.2LFU,LF is characterized and qualified specifically for ESD immunity - verified to withstand ±8 kV IEC61000-4-2 contact discharge without parametric shift or failure. It features tightly controlled 6.5 pF capacitance and low leakage (<2.5 μA), whereas standard Zeners lack guaranteed ESD test data, exhibit higher capacitance, and may degrade after repeated transients. The DF3A6.2LFU,LF is optimized for fast transient response, not DC regulation.
DF3A6.2LFU,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 (Max)
- Voltage - Breakdown (Min):
- 5.9V
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 6.5pF @ 1MHz
- Operating Temperature:
- 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- USM
DF3A6.2LFU,LF FAQ
1.How can I place an order for DF3A6.2LFU,LF through Aetrix?
Please submit a Request for Quotation (RFQ) for DF3A6.2LFU,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 DF3A6.2LFU,LF reliable?
The price and inventory of DF3A6.2LFU,LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF3A6.2LFU,LF is usually 5 days.
3.What payment methods are accepted for DF3A6.2LFU,LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF3A6.2LFU,LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF3A6.2LFU,LF?
DF3A6.2LFU,LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF3A6.2LFU,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 DF3A6.2LFU,LF?
For technical support, including DF3A6.2LFU,LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF3A6.2LFU,LF requirements.
6.How does Aetrix verify that DF3A6.2LFU,LF is sourced from the original manufacturer or authorized distributors?
All DF3A6.2LFU,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 DF3A6.2LFU,LF meets industry standards.
7.What is the process for return or replacement of DF3A6.2LFU,LF?
All DF3A6.2LFU,LF units undergo pre-shipment inspection (PSI). If there is an issue with DF3A6.2LFU,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 DF3A6.2LFU,LF part is unused and in its original packaging.
Return procedure for DF3A6.2LFU,LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DF3A6.2LFU,LF Tags
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ESD9B5.0ST5G
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D12V0L1B2LP-7B
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