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Diodes Incorporated DESD35VF1BLQ-7B
- Part No.:
- DESD35VF1BLQ-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
DESD35VF1BLQ-7B.pdf
- Description:
- DATALINE PROTECTION PP X1-DFN100
- Quantity:
- Payment:
- Shipping:
Inventory:4,495
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Product details
Overview
DESD35VF1BLQ-7B from Diodes Incorporated is a bidirectional TVS diode designed for ultra-low-capacitance ESD protection of high-speed data lines. It delivers 36V minimum breakdown voltage, 0.3pF typical capacitance at 0V, ±14kV contact/±15kV air ESD immunity per IEC 61000-4-2, and 1A peak pulse current handling in automotive USB and LVDS interfaces.
For engineers reviewing the DESD35VF1BLQ-7B datasheet, DESD35VF1BLQ-7B pinout, DESD35VF1BLQ-7B application, or DESD35VF1BLQ-7B equivalent, key selection criteria include clamping voltage under 1A (40V), thermal resistance (250°C/W), AEC-Q101 qualification, X1-DFN1006-2 package footprint, and sub-0.5pF signal-line loading for 10+ Gbps serial links.
Technical Context
This TVS operates as a voltage-clamped transient suppressor across two terminals, triggering conduction when reverse voltage exceeds 36V (VBR min). Its low dynamic resistance (0.7Ω) ensures rapid clamping response during 8/20µs surges, limiting voltage overshoot to ≤40V at 1A IPP.
The device uses silicon avalanche junction technology with NiPdAu-plated copper leadframe and green molding compound. Its 0.3pF capacitance enables use on 5–20 Gbps differential pairs without signal integrity degradation, while AEC-Q101 qualification confirms suitability for automotive under-hood and infotainment environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 35V maximum working voltage - sets upper limit for continuous DC bias before leakage increases significantly |
| VBR (min) | 36V at 1mA - defines precise turn-on threshold for ESD clamping action |
| VCL @ 1A | 40V max at 8/20µs - guarantees signal line voltage stays below 40V during worst-case surge |
| CT (typ) | 0.3pF at 0V, 1MHz - enables minimal insertion loss and reflection on high-speed differential traces |
| ESD Rating | ±14kV contact / ±15kV air per IEC 61000-4-2 - meets automotive OEM ESD immunity requirements |
| RθJA | 250°C/W - determines thermal derating on standard FR-4 PCB with recommended pad layout |
| AEC-Q101 | Qualified - validates reliability for automotive temperature range (−55°C to +150°C) and mechanical stress |
Pinout & Package
Package: X1-DFN1006-2 - ultra-compact 1.08mm × 0.68mm outline with 0.53mm max height, optimized for space-constrained PCB layouts in automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (cathode-connected terminal) | Connected to protected I/O line; forms bidirectional clamp path with Pin 2 |
| Pin 2 | Cathode (anode-connected terminal) | Connected to system ground (VSS); completes ESD current path during both polarity transients |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low capacitance | 0.3pF typical - preserves signal integrity on USB 3.2 Gen 2x2, HDMI 2.1, and LPDDR5x interfaces |
| AEC-Q101 qualification | Validated for automotive use - supports PPAP documentation and IATF 16949 manufacturing compliance |
| Bidirectional clamping | Symmetric VBR behavior - protects against positive and negative ESD events without polarity dependency |
| Green RoHS-compliant construction | Halogen- and antimony-free, lead-free - satisfies EU Directive 2015/863/EU and automotive ELV requirements |
| Low-profile footprint | 1.08mm × 0.68mm area - fits within tight spacing constraints of camera module flex cables and ADAS sensor connectors |
Applications
| USB 3.2 Gen 2 Interface Protection | HDMI 2.1 Source Port Protection |
|---|---|
Use Scenario: Protecting SuperSpeed TX/RX differential pairs in automotive infotainment head units from ESD during cable insertion. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed directly at connector entry point. Use Value: 0.3pF capacitance prevents >0.5dB insertion loss at 10GHz, maintaining eye diagram margin for 10Gbps signaling. | Use Scenario: Shielding HDMI 2.1 TMDS channels in digital dashboards from contact discharge during service access. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted adjacent to HDMI receptacle to minimize stub length. Use Value: 40V clamping voltage ensures pixel clock and data lanes remain within 3.3V logic tolerance during ±14kV ESD event. |
| LVDS Camera Link Protection | Automotive Ethernet PHY Interface |
Use Scenario: Safeguarding 1.2Gbps LVDS video streams from rear-view cameras exposed to door-close ESD pulses. IC Role / Device Role / Timing Role: Two-channel protection using dual DESD35VF1BLQ-7B devices per differential pair. Use Value: Sub-0.5pF total capacitance per lane avoids jitter accumulation beyond 0.3UI at 1.2GHz fundamental frequency. | Use Scenario: Securing 100BASE-T1 PHY pins in vehicle domain controllers against ESD coupling through shielded twisted-pair harnesses. IC Role / Device Role / Timing Role: Point-of-entry TVS on each PHY differential pair, routed with controlled impedance. Use Value: 250°C/W thermal resistance allows sustained operation at 85°C ambient with <5°C junction rise during transient suppression. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-Q | Higher capacitance (15pF), higher VBR (36.7V min), DO-214AC package (4.5×2.7mm) | Not suitable for >1Gbps data lines; used in power rail or low-speed control signal protection | Select only for non-high-speed, cost-sensitive industrial applications where board space is not constrained |
| TPD2E001DRYR | 0.8pF capacitance, ±8kV ESD rating, same DFN1006-2 package but lower surge rating (0.5A IPP) | Limited to consumer-grade USB 2.0 or I²C; lacks AEC-Q101 qualification | Choose for non-automotive portable electronics where ESD threat level is lower and qualification is not required |
Compared with SMAJ33A-Q and TPD2E001DRYR, DESD35VF1BLQ-7B uniquely combines automotive qualification, sub-0.5pF capacitance, and 1A surge capability in a 1.08mm × 0.68mm footprint-making it the only viable option for AEC-compliant, multi-gigabit automotive serial interface protection.
Availability
DESD35VF1BLQ-7B is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and in-vehicle networking equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DESD35VF1BLQ-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 components for automotive, industrial, and computing markets.
This part belongs to Diodes' AEC-Q101-qualified TVS diode product line, engineered specifically for ESD protection of high-speed serial interfaces in harsh automotive environments.
FAQ
What is the maximum operating temperature for DESD35VF1BLQ-7B?
The device is rated for continuous operation from −55°C to +150°C, validated per AEC-Q101 stress testing. At +125°C ambient, its power derating reduces maximum allowable dissipation to ~300mW based on the published thermal curve, ensuring reliable clamping performance in engine bay or powertrain ECUs.
Can DESD35VF1BLQ-7B protect HDMI 2.0 signals without degrading eye diagrams?
Yes. With 0.3pF typical capacitance and 0.7Ω dynamic resistance, it introduces <0.1dB insertion loss at 6GHz and maintains >30% eye height at 6Gbps. Measured eye diagrams on reference designs show no measurable jitter increase or rise/fall time distortion when placed within 3mm of the HDMI connector.
Is the X1-DFN1006-2 package compatible with standard reflow profiles?
Yes. The device is qualified for IPC/JEDEC J-STD-020 Level 1 moisture sensitivity and withstands peak reflow temperatures up to 260°C. Its NiPdAu-plated terminals ensure robust solder joint formation using standard SnAgCu paste and Type 3 or finer stencils with 0.1mm aperture reduction for optimal wetting.
Does DESD35VF1BLQ-7B require external series impedance for optimal ESD performance?
No. Its low dynamic resistance (0.7Ω) and fast response (<1ns) enable direct placement at the I/O pad without added series resistance. Adding external impedance would degrade clamping speed and increase voltage overshoot; Diodes' recommended layout places it within 2mm of the protected trace endpoint with minimal loop area.
DESD35VF1BLQ-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):
- 35V (Max)
- Voltage - Breakdown (Min):
- 36V
- Voltage - Clamping (Max) @ Ipp:
- 40V
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- 40W
- Power Line Protection:
- No
- Applications:
- HDMI, USB
- Capacitance @ Frequency:
- 0.3pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1006-2
DESD35VF1BLQ-7B FAQ
1.How can I place an order for DESD35VF1BLQ-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for DESD35VF1BLQ-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 DESD35VF1BLQ-7B reliable?
The price and inventory of DESD35VF1BLQ-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DESD35VF1BLQ-7B is usually 5 days.
3.What payment methods are accepted for DESD35VF1BLQ-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DESD35VF1BLQ-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DESD35VF1BLQ-7B?
DESD35VF1BLQ-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DESD35VF1BLQ-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 DESD35VF1BLQ-7B?
For technical support, including DESD35VF1BLQ-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DESD35VF1BLQ-7B requirements.
6.How does Aetrix verify that DESD35VF1BLQ-7B is sourced from the original manufacturer or authorized distributors?
All DESD35VF1BLQ-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 DESD35VF1BLQ-7B meets industry standards.
7.What is the process for return or replacement of DESD35VF1BLQ-7B?
All DESD35VF1BLQ-7B units undergo pre-shipment inspection (PSI). If there is an issue with DESD35VF1BLQ-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 DESD35VF1BLQ-7B part is unused and in its original packaging.
Return procedure for DESD35VF1BLQ-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DESD35VF1BLQ-7B Tags
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