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Diodes Incorporated DESD3V3S1BL-7B
- Part No.:
- DESD3V3S1BL-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
DESD3V3S1BL-7B.pdf
- Description:
- TVS DIODE 3.3VWM 7VC DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:1,272,881
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Product details
Overview
DESD3V3S1BL-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 contact/±30 kV air ESD immunity per IEC 61000-4-2, 10–13 pF input capacitance at 1 MHz, and a 4.5–5.4 V clamping voltage at 1 A, enabling use in USB 2.0, HDMI, and cellular antenna interfaces.
For engineers reviewing the DESD3V3S1BL-7B datasheet, DESD3V3S1BL-7B pinout, DESD3V3S1BL-7B application, or DESD3V3S1BL-7B equivalent, key selection criteria include low-channel capacitance (<13 pF), sub-5.5 V clamping at 1 A, DFN1006-2 package compatibility with 0.4 mm pitch layouts, and IEC 61000-4-2 Level 4 compliance for handheld device front-end protection.
Technical Context
This monolithic silicon TVS diode uses an avalanche breakdown structure to provide fast transient suppression on bidirectional signal paths. Its low junction capacitance is achieved via optimized doping and geometry in the X1-DFN1006-2 die layout, supporting data rates up to 480 Mbps without signal integrity degradation.
The device operates as a voltage-clamped shunt protector: below 3.3 V it presents <100 nA leakage; above breakdown (~3.8 V), it clamps transients to ≤5.4 V at 1 A (8/20 µs) while dissipating up to 35 W peak pulse power. Thermal resistance is 500 °C/W on standard FR-4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 3.3 V - Maximum continuous working voltage before conduction begins; matches 3.3 V I/O rail systems. |
| Clamping Voltage (1 A) | ≤5.4 V - Limits transient voltage seen by protected IC during ESD event; ensures downstream logic remains within safe operating margin. |
| ESD Rating (Contact) | ±25 kV - Meets IEC 61000-4-2 Level 4; sufficient for direct user-touch scenarios in consumer handsets. |
| Channel Capacitance | 10–13 pF - Enables minimal signal distortion on USB 2.0, SDIO, and MIPI D-PHY lines at full speed. |
| Package | X1-DFN1006-2 - 1.08 × 0.68 mm footprint with 0.4 mm pin pitch; compatible with automated SMT placement and reflow. |
| Peak Pulse Power | 35 W - Sustains 8/20 µs surges up to 5 A; supports lightning-induced surge immunity per IEC 61000-4-5 (lightning waveform). |
Pinout & Package
DESD3V3S1BL-7B is housed in the X1-DFN1006-2 surface-mount package: ultra-thin (0.53 mm max height), halogen-free, RoHS-compliant, with NiPdAu-plated copper terminals and cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Input/Output Terminal | Bidirectional ESD path anode; connects to protected signal line (e.g., USB D+). |
| Pin 2 (Cathode) | Input/Output Terminal | Bidirectional ESD path cathode; connects to same protected signal line (e.g., USB D+) - device is symmetric. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile DFN packaging | 0.53 mm max height enables integration into slim smartphones and wearables without board thickness penalty. |
| Ultra-low channel capacitance | 10–13 pF at 0 V bias preserves signal rise/fall times on 480 Mbps USB 2.0 links. |
| IEC 61000-4-2 Level 4 compliance | ±25 kV contact / ±30 kV air rating meets highest ESD stress class for handheld end-user interfaces. |
| Green compound construction | Halogen- and antimony-free molding compound (Br+Cl <1500 ppm, Sb <1000 ppm) satisfies strict environmental mandates. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines in smartphone USB ports against repeated electrostatic discharge during cable insertion/removal. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed directly at connector, clamping transients before they reach USB PHY IC. Use Value: 10–13 pF capacitance avoids eye diagram closure; 5.4 V clamping at 1 A prevents PHY latch-up or damage. | Use Scenario: Shielding TMDS clock and data pairs in portable HDMI adapters from ESD events during hot-plug operations. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted adjacent to HDMI receptacle, referenced to ground plane with minimal loop area. Use Value: Sub-5.5 V clamping maintains HDMI DC balance; 3.3 V standoff aligns with 3.3 V tolerant receiver inputs. |
| Cellular Antenna Feedline Protection | SD Card Interface Protection |
Use Scenario: Guarding RF front-end antenna switch control lines in LTE/5G handsets from ESD coupling through metal bezels or buttons. IC Role / Device Role / Timing Role: TVS placed between baseband processor GPIO and antenna tuner, suppressing fast transients without loading control timing. Use Value: 100 nA leakage at 3.3 V ensures no DC offset on bias lines; 0.3 Ω differential resistance minimizes signal attenuation. | Use Scenario: Securing SDIO command, clock, and data lines in tablets and digital cameras against ESD during card insertion. IC Role / Device Role / Timing Role: One-device-per-line protection scheme using discrete bidirectional TVS on each SDIO trace. Use Value: 35 W peak power rating handles multiple ESD strikes; 0.53 mm profile fits under SD card slot mechanical constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J3.3A-Q | DO-214AC package; 350 pF capacitance; 6.5 V clamping at 1 A; higher leakage (1 µA). | Not suitable for >10 Mbps data lines due to excessive capacitance; used in power rail or low-speed GPIO protection. | Select only when board space allows larger package and signal speed <1 Mbps. |
| TPD2E001DRYR | 2-channel array in X2SON-6; 12 pF typical capacitance; 5.5 V clamping at 1 A; integrated ESD protection for dual-line interfaces. | Requires two protected lines sharing one device; not pin-to-pin replaceable for single-line use. | Choose when protecting paired signals (e.g., I²C SDA/SCL) to reduce component count and PCB area. |
Compared with SMA6J3.3A-Q and TPD2E001DRYR, DESD3V3S1BL-7B uniquely balances ultra-low capacitance (10–13 pF), compact DFN1006-2 footprint, and precise 3.3 V standoff-making it optimal for single-line, high-speed interface protection where board real estate and signal fidelity are critical.
Availability
DESD3V3S1BL-7B is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line safeguarding, and cellular antenna feedline ESD mitigation requiring stable component supply across high-volume consumer electronics production.
Supply support for DESD3V3S1BL-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
This device belongs to Diodes' DESD series of low-capacitance TVS diodes, engineered specifically for ESD protection of high-speed digital interfaces in space-constrained portable electronics.
FAQ
What is the maximum operating temperature range for DESD3V3S1BL-7B?
The device is rated for operation from –65 °C to +150 °C, with thermal derating applied above +25 °C ambient. At +85 °C ambient, its peak pulse power capability reduces to approximately 175 mW based on the 500 °C/W junction-to-ambient thermal resistance and Figure 1 derating curve.
Does DESD3V3S1BL-7B require external biasing or control signals?
No. The device is a passive, bidirectional TVS diode that operates without any external power, bias, or control. It functions solely through avalanche breakdown when transient voltage exceeds its breakdown threshold (~3.8 V), automatically clamping excess energy to ground.
Can DESD3V3S1BL-7B be used for IEC 61000-4-5 surge protection?
Yes-it is rated for 35 W peak pulse power (8/20 µs waveform), which corresponds to ~5 A peak current. While primarily designed for ESD, it provides limited lightning-surge immunity per IEC 61000-4-5 Category 1 (low-energy surges); for higher-level surge protection, dedicated high-energy TVS arrays or GDTs are recommended.
How is polarity identified on the DESD3V3S1BL-7B package?
Polarity is marked by a cathode band on the top surface of the X1-DFN1006-2 package, aligned with Pin 2. The device is symmetric (bidirectional), so either terminal may serve as anode or cathode depending on transient polarity-but the band indicates the conventional cathode side for orientation consistency during placement.
DESD3V3S1BL-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:
- 10pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1006-2
DESD3V3S1BL-7B FAQ
1.How can I place an order for DESD3V3S1BL-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for DESD3V3S1BL-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 DESD3V3S1BL-7B reliable?
The price and inventory of DESD3V3S1BL-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DESD3V3S1BL-7B is usually 5 days.
3.What payment methods are accepted for DESD3V3S1BL-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DESD3V3S1BL-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DESD3V3S1BL-7B?
DESD3V3S1BL-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DESD3V3S1BL-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 DESD3V3S1BL-7B?
For technical support, including DESD3V3S1BL-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DESD3V3S1BL-7B requirements.
6.How does Aetrix verify that DESD3V3S1BL-7B is sourced from the original manufacturer or authorized distributors?
All DESD3V3S1BL-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 DESD3V3S1BL-7B meets industry standards.
7.What is the process for return or replacement of DESD3V3S1BL-7B?
All DESD3V3S1BL-7B units undergo pre-shipment inspection (PSI). If there is an issue with DESD3V3S1BL-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 DESD3V3S1BL-7B part is unused and in its original packaging.
Return procedure for DESD3V3S1BL-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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