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Diodes Incorporated DESD3V3E1BL-7B
- Part No.:
- DESD3V3E1BL-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
DESD3V3E1BL-7B.pdf
- Description:
- TVS DIODE 3.3VWM 7VC DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:271,273
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Product details
Overview
DESD3V3E1BL-7B from Diodes Incorporated is a low-capacitance bidirectional TVS diode designed for ESD protection of high-speed data lines in portable electronics. It features a 3.3 V reverse standoff voltage, ±25 kV IEC61000-4-2 contact/air ESD rating, 13 pF channel capacitance at 0 V, 5 A peak pulse current (8/20 µs), and X1-DFN1006-2 package. It is commonly deployed on USB 2.0, HDMI, and audio interface lines.
For engineers reviewing the DESD3V3E1BL-7B datasheet, DESD3V3E1BL-7B pinout, DESD3V3E1BL-7B application, or DESD3V3E1BL-7B equivalent, key selection criteria include clamping voltage under 5.4 V at 1 A, ultra-low 13 pF input capacitance for signal integrity, bidirectional polarity, and compatibility with space-constrained 0.68 mm × 1.08 mm PCB footprints.
Technical Context
This TVS diode operates as a voltage-clamped transient suppressor across a single I/O-to-VSS path. Its bidirectional structure enables symmetric clamping for AC-coupled or differential signaling lines, and its low 0.3 Ω differential resistance ensures minimal voltage overshoot during fast ESD events.
The device uses silicon avalanche junction technology optimized for sub-5 V operation, with breakdown voltage specified at 3.8–6.5 V (IR = 1 mA) and clamping voltage tightly bounded at 4.5–5.4 V (IPP = 1 A, 8/20 µs). Thermal resistance is 500 °C/W on standard FR-4 layout, supporting continuous power dissipation up to 250 mW at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 3.3 V - Maximum working voltage before conduction; preserves signal integrity on 3.3 V logic/data lines |
| Clamping Voltage (1 A) | 4.5–5.4 V - Limits transient overvoltage to safe levels for downstream 3.3 V ICs |
| ESD Rating (IEC61000-4-2) | ±25 kV air & contact - Meets highest industrial ESD immunity requirement |
| Channel Capacitance | 13 pF @ 0 V, 1 MHz - Enables use on USB 2.0 (480 Mbps) and audio interfaces without signal distortion |
| Peak Pulse Current | 5 A (8/20 µs) - Withstands multiple high-energy transients per IEC61000-4-5 Level 2 |
| Breakdown Voltage | 3.8–6.5 V @ 1 mA - Ensures reliable turn-on margin above 3.3 V rail while avoiding false triggering |
| Differential Resistance | 0.3 Ω - Minimizes IR drop during clamping, reducing residual voltage stress on protected IC |
Pinout & Package
Package: X1-DFN1006-2 - ultra-compact 2-terminal surface-mount package (1.08 mm × 0.68 mm, 0.53 mm max height), cathode band marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | I/O line connection | Connected to protected data line (e.g., USB D+, HDMI TMDS+); bidirectional conduction path |
| Cathode (Pin 2) | VSS reference | Connected to system ground plane; forms low-inductance return path for ESD current |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional ESD suppression | Enables protection of AC-coupled or differential signals (e.g., USB, HDMI) without polarity constraints |
| 13 pF channel capacitance | Preserves signal rise time and eye diagram integrity on 480 Mbps USB 2.0 links |
| ±25 kV IEC61000-4-2 rating | Meets full-system ESD compliance for handheld consumer devices without additional shielding |
| X1-DFN1006-2 footprint | Reduces PCB area by >50% vs. SOD-323, enabling placement directly at connector entry points |
| Lead-free & halogen-free construction | Fully compliant with RoHS 3 (2015/863/EU) and JEDEC J-STD-020 moisture sensitivity level 1 |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: ESD protection for D+ and D− lines in smartphone USB OTG ports and tablet host controllers. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed within 2 mm of USB connector to shunt ESD energy before reaching PHY IC. Use Value: 13 pF capacitance avoids signal degradation at 480 Mbps; ±25 kV rating eliminates need for secondary board-level shielding. | Use Scenario: Clamping transients on TMDS clock and data channels in portable media players and docking stations. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to HDMI receptacle to limit voltage excursion during hot-plug or cable discharge events. Use Value: Sub-5.4 V clamping at 1 A ensures TMDS receivers (typically 3.3 V tolerant) remain within absolute maximum ratings. |
| Smartphone Audio Jack Protection | Industrial Sensor Interface Protection |
Use Scenario: ESD safeguarding of analog audio paths (MIC, HP_L/R) in compact handsets exposed to frequent human handling. IC Role / Device Role / Timing Role: Single-channel bidirectional TVS bridging audio line to ground, leveraging low leakage (<100 nA) to avoid DC bias shift. Use Value: 3.3 V standoff matches typical audio codec I/O voltage; 0.3 Ω dynamic resistance minimizes audible pop during discharge. | Use Scenario: Transient suppression on RS-485 or CAN FD data lines in factory automation gateways operating in electrically noisy environments. IC Role / Device Role / Timing Role: Front-end protection element on communication bus lines, rated for repeated 5 A surges per IEC61000-4-5. Use Value: 35 W peak pulse power and 500 °C/W thermal resistance enable robust operation at elevated ambient temperatures (up to +125 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3.3A-Q | Unidirectional, higher 200 pF capacitance, SMA package (4.5 mm × 2.7 mm) | Requires polarity-aware layout; unsuitable for AC-coupled or differential lines | Select only when unidirectional protection suffices and board space permits larger footprint |
| SP1003-030 | 3.3 V standoff, 0.35 pF capacitance, 3-pin μDFN (1.0 mm × 0.6 mm), integrated GND pin | Offers lower capacitance but requires 3-layer routing for dedicated ground return | Prefer for RF-sensitive applications like LTE antenna switches where <1 pF is critical |
Compared with SMAJ3.3A-Q and SP1003-030, DESD3V3E1BL-7B uniquely balances ultra-low capacitance (13 pF), bidirectional symmetry, and minimal 1.08 mm × 0.68 mm footprint-making it optimal for space-constrained, high-speed digital interfaces requiring polarity-agnostic ESD hardening.
Availability
DESD3V3E1BL-7B is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line hardening, and smartphone audio jack safeguarding requiring stable component supply across high-volume consumer electronics programs.
Supply support for DESD3V3E1BL-7B 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, specializing in high-reliability protection, power management, and signal integrity solutions for consumer, industrial, and automotive markets.
The DESD3V3E1BL-7B belongs to Diodes' low-capacitance TVS diode product line, engineered specifically for ESD-hardening of high-speed serial interfaces in compact portable electronics without compromising signal fidelity.
FAQ
What is the maximum clamping voltage of DESD3V3E1BL-7B at 5 A?
The clamping voltage is 5.8–7.0 V under 8/20 µs pulse conditions at 5 A peak current, as specified in the Electrical Characteristics table. This value reflects worst-case transient suppression performance during high-energy ESD events and must be verified against the protected IC's absolute maximum voltage rating.
Is DESD3V3E1BL-7B suitable for protecting USB 3.0 lines?
No-its 13 pF capacitance exceeds the typical ≤1 pF requirement for SuperSpeed (5 Gbps) USB 3.0 differential pairs. It is validated for USB 2.0 (480 Mbps) and other sub-100 MHz interfaces where 13 pF introduces negligible insertion loss and maintains acceptable eye opening.
How is polarity identified on the X1-DFN1006-2 package?
Polarity is indicated by a cathode band mark on the top surface of the device, aligned with Pin 2 (cathode terminal). The bottom-view schematic in the datasheet confirms Pin 1 as anode and Pin 2 as cathode, with the marking bar adjacent to Pin 1 per standard DFN orientation conventions.
Does DESD3V3E1BL-7B require external series impedance for optimal ESD performance?
No external series resistor is required-the device is designed for direct placement between I/O line and ground. However, minimizing PCB trace inductance (short, wide traces; ground via within 1 mm) is critical to achieve the specified ±25 kV ESD rating and prevent voltage overshoot during nanosecond-scale transients.
DESD3V3E1BL-7B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 0402 (1006 Metric)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 3.8V
- Voltage - Clamping (Max) @ Ipp:
- 7V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 35W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 13pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1006-2
DESD3V3E1BL-7B FAQ
1.How can I place an order for DESD3V3E1BL-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for DESD3V3E1BL-7B 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 DESD3V3E1BL-7B reliable?
The price and inventory of DESD3V3E1BL-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DESD3V3E1BL-7B is usually 5 days.
3.What payment methods are accepted for DESD3V3E1BL-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DESD3V3E1BL-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DESD3V3E1BL-7B?
DESD3V3E1BL-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DESD3V3E1BL-7B 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 DESD3V3E1BL-7B?
For technical support, including DESD3V3E1BL-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DESD3V3E1BL-7B requirements.
6.How does Aetrix verify that DESD3V3E1BL-7B is sourced from the original manufacturer or authorized distributors?
All DESD3V3E1BL-7B 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 DESD3V3E1BL-7B meets industry standards.
7.What is the process for return or replacement of DESD3V3E1BL-7B?
All DESD3V3E1BL-7B units undergo pre-shipment inspection (PSI). If there is an issue with DESD3V3E1BL-7B, 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 DESD3V3E1BL-7B part is unused and in its original packaging.
Return procedure for DESD3V3E1BL-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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