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Diodes Incorporated DESD18VF1BLQ-7B
- Part No.:
- DESD18VF1BLQ-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
DESD18VF1BLQ-7B.pdf
- Description:
- DATALINE PROTECTION PP X1-DFN100
- Quantity:
- Payment:
- Shipping:
Inventory:3,425
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Product details
Overview
DESD18VF1BLQ-7B from Diodes Incorporated is a bidirectional TVS diode designed for ultra-low-capacitance ESD protection of high-speed data lines. It delivers 19V minimum breakdown voltage, 0.3pF typical capacitance at 0V, ±10kV contact/±15kV air ESD immunity per IEC 61000-4-2, and 1A peak pulse current handling in automotive USB, HDMI, and LVDS interfaces.
For engineers reviewing the DESD18VF1BLQ-7B datasheet, DESD18VF1BLQ-7B pinout, DESD18VF1BLQ-7B application, or DESD18VF1BLQ-7B equivalent, key selection criteria include clamping voltage under 17V at 1A, sub-0.45pF capacitance at 1MHz, AEC-Q101 qualification, X1-DFN1006-2 footprint compatibility, and thermal resistance of 500°C/W on FR-4.
Technical Context
This TVS operates as a bidirectional shunt clamp with symmetrical avalanche behavior across both polarities, enabling robust protection of differential or single-ended signal paths without polarity constraints. Its low dynamic resistance (0.5Ω typ.) ensures rapid voltage clamping during transient events, while its ultra-low capacitance preserves signal integrity in >1Gbps interfaces.
The device is rated for continuous reverse working voltage of 18V and achieves 17V clamping at 1A (8/20µs), with thermal derating to 250mW at +25°C ambient and full operation from –55°C to +150°C - meeting automotive under-hood and infotainment module requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 19–25V at 1mA: Ensures reliable turn-on before system-level damage occurs in 18V-rated interfaces. |
| Clamping Voltage (VCL) | 17V max at 1A (8/20µs): Limits transient overvoltage to safe levels for 3.3V/5V PHY receivers. |
| Capacitance (CT) | 0.3–0.45pF at 0V, 1MHz: Enables use in HDMI 2.0, USB 3.2 Gen 1, and LVDS without signal distortion. |
| ESD Rating | ±10kV contact / ±15kV air per IEC 61000-4-2: Meets automotive OEM ESD immunity requirements. |
| Package | X1-DFN1006-2 (1.08 × 0.68 × 0.53mm): Supports automated placement in space-constrained modules. |
| Thermal Resistance (RθJA) | 500°C/W on FR-4: Requires minimal copper area for thermal management in compact PCB layouts. |
Pinout & Package
Package: X1-DFN1006-2 - ultra-thin, leadless, halogen-free molded plastic package with NiPdAu-plated terminals; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (A) | One terminal of bidirectional junction; connects to protected signal line (e.g., USB D+). |
| Pin 2 | Cathode (K) | Second terminal of bidirectional junction; connects to same signal line or ground reference depending on layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JEDEC standards. |
| Ultra-low input capacitance | 0.3pF typical enables <1% signal rise-time degradation in 5Gbps differential links. |
| Low-profile footprint | 0.53mm max height allows stacking under connectors or beneath shields in slim automotive modules. |
| Lead-free & green construction | Meets RoHS 3, halogen-free (<900ppm Br/Cl, <1000ppm Sb), UL 94V-0 rated molding compound. |
Applications
| USB 3.2 Gen 1 Interface Protection | HDMI 2.0 Signal Line Protection |
|---|---|
Use Scenario: Protecting SuperSpeed USB data lanes against ESD events during hot-plug insertion in automotive infotainment head units. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed directly at connector, clamping transients before reaching USB PHY IC. Use Value: 0.3pF capacitance prevents eye diagram closure; ±10kV contact rating exceeds ISO 10605 requirements for vehicle-mounted ports. | Use Scenario: Safeguarding HDMI TMDS channels in digital instrument clusters where high-speed video signals pass through tight routing near metal enclosures. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted adjacent to HDMI receptacle to suppress fast-rising ESD pulses without degrading 6Gbps pixel clock timing. Use Value: 17V clamping voltage ensures HDMI receiver inputs remain below absolute maximum ratings during 1A surge events. |
| LVDS Camera Link Protection | Automotive Ethernet (100BASE-T1) PHY Protection |
Use Scenario: Shielding rear-view camera LVDS pairs from ESD induced by cable flexing or static discharge in trunk compartments. IC Role / Device Role / Timing Role: Dual-channel protection implemented using two DESD18VF1BLQ-7B devices per differential pair, one per line. Use Value: Symmetrical bidirectional clamping maintains common-mode integrity; 0.45pF max capacitance avoids skew between P/N lines. | Use Scenario: Front-end transient suppression for 100BASE-T1 PHYs in ADAS domain controllers exposed to harsh EMC environments. IC Role / Device Role / Timing Role: TVS placed between transformer center-tap and PHY pins to absorb coupled surges without loading 65MHz signaling bandwidth. Use Value: 500°C/W thermal resistance supports sustained operation at 85°C ambient in sealed ECUs; AEC-Q101 ensures long-term field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-Q | DO-214AC package; 1.5pF capacitance; 27.7V VBR; 30A IPP | Higher capacitance limits use to ≤100Mbps interfaces; larger footprint incompatible with fine-pitch connectors. | Select only when higher surge rating outweighs signal integrity needs and board space permits. |
| TPD2E001DRYR | 0.9pF capacitance; dual-channel; 5.5V VRWM; not AEC-Q101 qualified | Lower voltage rating restricts use to 3.3V logic; lacks automotive qualification for safety-critical modules. | Acceptable for non-automotive portable electronics but unsuitable for AEC-compliant designs. |
Compared with SMAJ18A-Q and TPD2E001DRYR, DESD18VF1BLQ-7B uniquely combines AEC-Q101 qualification, 0.3pF capacitance, and X1-DFN1006-2 packaging - making it the only option validated for high-speed automotive serial interfaces requiring both ESD robustness and signal fidelity.
Availability
DESD18VF1BLQ-7B is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and digital instrument clusters requiring stable component supply across extended production lifecycles.
Supply support for DESD18VF1BLQ-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 device belongs to Diodes' AEC-Q101-qualified TVS portfolio, engineered specifically for ESD protection of high-speed serial interfaces in automotive electronics where low capacitance and thermal resilience are critical.
FAQ
What is the maximum operating temperature range for DESD18VF1BLQ-7B?
The device operates continuously from –55°C to +150°C, fully compliant with AEC-Q101 temperature cycling and storage requirements. This range supports deployment in engine bay ECUs, under-dash infotainment units, and rear-seat entertainment systems without thermal derating concerns up to +125°C ambient.
Does DESD18VF1BLQ-7B require external biasing or control circuitry?
No. The DESD18VF1BLQ-7B is a passive, bidirectional TVS diode that functions without power, bias, or control signals. It remains in high-impedance state until transient voltage exceeds its breakdown threshold, then clamps automatically via avalanche conduction - ideal for zero-footprint, zero-complexity protection.
How does the 0.3pF capacitance impact USB 3.2 Gen 1 signal integrity?
At 0.3pF typical, the device adds negligible capacitive loading to 5Gbps differential pairs, resulting in <0.5% rise-time degradation and no measurable eye-diagram closure in standard FR-4 layouts. This meets USB-IF compliance margins for insertion loss and jitter accumulation in host-to-peripheral links.
Is DESD18VF1BLQ-7B compatible with lead-free reflow profiles?
Yes. The device is qualified for standard lead-free reflow per J-STD-020, with peak temperatures up to 260°C. Its NiPdAu-plated terminals ensure solderability and intermetallic formation control, and its MSL Level 1 rating eliminates bake requirements prior to assembly.
DESD18VF1BLQ-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):
- 18V (Max)
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- 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
DESD18VF1BLQ-7B FAQ
1.How can I place an order for DESD18VF1BLQ-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for DESD18VF1BLQ-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 DESD18VF1BLQ-7B reliable?
The price and inventory of DESD18VF1BLQ-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DESD18VF1BLQ-7B is usually 5 days.
3.What payment methods are accepted for DESD18VF1BLQ-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DESD18VF1BLQ-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DESD18VF1BLQ-7B?
DESD18VF1BLQ-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DESD18VF1BLQ-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 DESD18VF1BLQ-7B?
For technical support, including DESD18VF1BLQ-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DESD18VF1BLQ-7B requirements.
6.How does Aetrix verify that DESD18VF1BLQ-7B is sourced from the original manufacturer or authorized distributors?
All DESD18VF1BLQ-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 DESD18VF1BLQ-7B meets industry standards.
7.What is the process for return or replacement of DESD18VF1BLQ-7B?
All DESD18VF1BLQ-7B units undergo pre-shipment inspection (PSI). If there is an issue with DESD18VF1BLQ-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 DESD18VF1BLQ-7B part is unused and in its original packaging.
Return procedure for DESD18VF1BLQ-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DESD18VF1BLQ-7B Tags
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