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Diodes Incorporated DBLC18CI-7
- Part No.:
- DBLC18CI-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
DBLC18CI-7.pdf
- Description:
- Dataline Protection PP SOD323 T&
- Quantity:
- Payment:
- Shipping:
Inventory:4,408
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Product details
Overview
DBLC18CI-7 from Diodes Incorporated is a bidirectional ultra-low-capacitance TVS diode designed for ESD protection of high-speed data lines, featuring 0.6 pF typical input capacitance, 20 V minimum breakdown voltage, ±27 kV contact/±30 kV air ESD rating per IEC 61000-4-2, and 8 A peak pulse current handling in an SOD323 package-used in USB 2.0 and 10/100/1000BASE-T Ethernet interfaces.
For engineers reviewing the DBLC18CI-7 datasheet, DBLC18CI-7 pinout, DBLC18CI-7 application, or DBLC18CI-7 equivalent, key selection criteria include clamping voltage at 8 A (44 V), low leakage (<1 µA at 18 V), thermal resistance (500 °C/W), and compatibility with high-frequency signal integrity requirements in compact portable and networking designs.
Technical Context
This device operates as a single-channel, bidirectional transient voltage suppressor optimized for electrostatic discharge suppression on unidirectional or bidirectional signal paths. Its silicon avalanche structure enables fast response (<1 ns) to ESD events while maintaining sub-1 pF capacitance across 0–18 V reverse bias range.
The SOD323 package supports high-density PCB layouts with minimal parasitic inductance; its 0.6 pF CIN ensures minimal signal distortion up to 3 GHz, and the 30.5 V clamping voltage at 1 A enables robust protection without compromising data line voltage margins in 3.3 V or 5 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 18 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA; sets upper limit for safe operation on 15 V nominal data lines. |
| VBR (min) | 20 V - Minimum breakdown voltage at 1 mA; ensures reliable triggering above system operating voltage with margin against false triggering. |
| VCL @ 8 A | 44 V - Clamping voltage during 8/20 µs surge; defines worst-case overvoltage seen by protected IC during full-rated ESD event. |
| CIN (typ) | 0.6 pF - Input capacitance at 0 V, 1 MHz; preserves signal integrity in USB 2.0 (480 Mbps) and Gigabit Ethernet applications. |
| ESD Rating | ±27 kV contact / ±30 kV air - Complies with IEC 61000-4-2 Level 4; qualifies for front-panel and connector-level ESD hardening. |
| PPP | 350 W - Peak pulse power dissipation (8/20 µs); supports multiple ESD strikes without degradation under standard test conditions. |
Pinout & Package
Package: SOD323 - Surface-mount plastic package with 2-terminal configuration, 0.004 g mass, JEDEC-compliant outline (A2 = 1.05 mm, E = 1.70 mm, He = 2.50 mm), moisture sensitivity level 1, and matte tin-plated alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | ESD current sink path (positive polarity) | Conducts transient current to ground when line voltage exceeds VBR in positive direction; forms symmetrical clamp with cathode. |
| Cathode (K) | ESD current sink path (negative polarity) | Conducts transient current to ground when line voltage falls below –VBR; enables bidirectional protection without external polarity constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional ESD clamping | Enables protection of AC-coupled or differential data lines (e.g., USB D+/D−, Ethernet pairs) without polarity assignment or series DC blocking. |
| 0.6 pF typical capacitance | Minimizes insertion loss and group delay variation in 480 Mbps USB 2.0 and 1.25 Gbps Ethernet PHY interfaces. |
| ±30 kV air / ±27 kV contact ESD rating | Meets highest IEC 61000-4-2 immunity requirement for consumer and industrial end-equipment without additional shielding or layout mitigation. |
| Lead-free & halogen-free construction | Complies with RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb); supports automotive PPAP and IATF 16949 manufacturing. |
Applications
| USB 2.0 Interface Protection | Ethernet PHY Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− pins of USB 2.0 transceivers against user-handling ESD events during cable insertion/removal. IC Role / Device Role: Bidirectional clamping diode placed directly at connector, shunting transients to ground before reaching PHY IC. Use Value: Maintains 480 Mbps signal fidelity with <0.6 pF loading while surviving >1000 contact discharges per IEC 61000-4-2. |
Use Scenario: Guarding MDI pins of 1000BASE-T Ethernet PHYs against ESD induced via RJ-45 port exposure. IC Role / Device Role: Low-capacitance TVS on each twisted pair, mounted adjacent to magnetics or PHY package. Use Value: Prevents latch-up or gate oxide damage in PHY receivers while adding <0.02 dB insertion loss at 100 MHz. |
| Wireless Module Antenna Feed Protection | Industrial Sensor Interface Protection |
Use Scenario: Safeguarding RF front-end matching networks in Bluetooth/Wi-Fi modules from ESD coupling through antenna traces. IC Role / Device Role: Series-connected TVS between antenna switch and PA/LNA, operating in bidirectional mode across RF band. Use Value: Adds <0.1 dB insertion loss at 2.4 GHz while clamping 30 kV air discharge within 1 ns to preserve RF performance. |
Use Scenario: Shielding RS-485 or CAN FD transceiver inputs in factory automation controllers exposed to maintenance personnel ESD. IC Role / Device Role: Point-of-entry TVS on bus lines, placed before common-mode choke and transceiver. Use Value: Limits clamped voltage to <44 V during 8 A surge, ensuring transceiver survival without derating supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Unidirectional, 1.5 pF CIN, 29.2 V VCL@8 A, DO-214AC package | Requires polarity-aware layout; higher capacitance limits use to ≤100 Mbps interfaces | Select only if unidirectional signal flow is guaranteed and board space allows larger DO-214AC footprint. |
| TPD2E001DRYR | 2-channel, 1.9 pF CIN/channel, ±8 kV contact ESD, 0.65 mm × 0.65 mm X2SON | Higher capacitance and lower ESD rating; intended for low-speed I²C/UART, not USB/Ethernet | Use only for cost-sensitive, low-bandwidth digital I/O where 0.6 pF is not required. |
Compared with SMAJ18A and TPD2E001DRYR, DBLC18CI-7 uniquely delivers bidirectional operation, 0.6 pF capacitance, and ±30 kV air ESD rating in the compact SOD323 footprint-making it the only option qualified for high-speed, polarity-agnostic data line protection without trade-offs in clamping performance or board area.
Availability
DBLC18CI-7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, 1000BASE-T Ethernet PHY line hardening, and wireless module antenna feed safeguarding requiring stable component supply across production lifecycles.
Supply support for DBLC18CI-7 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 North America.
DBLC18CI-7 belongs to Diodes' ESD protection product line, engineered specifically for high-speed data line immunity in consumer, computing, and industrial connectivity applications where low capacitance and certified IEC 61000-4-2 performance are mandatory.
FAQ
What is the maximum operating temperature for DBLC18CI-7?
The DBLC18CI-7 is rated for junction temperatures from –55 °C to +150 °C, with thermal resistance RθJA of 500 °C/W on a standard FR-4 PCB (2 oz copper). This allows reliable operation in sealed enclosures or near heat-generating components when mounted per Diodes' recommended pad layout.
Does DBLC18CI-7 require external biasing or control signals?
No. DBLC18CI-7 is a passive, two-terminal device that operates without bias, power, or control signals. It functions solely through avalanche breakdown under overvoltage conditions and remains fully transparent to normal signal operation below 18 V reverse working voltage.
Can DBLC18CI-7 be used for DC power rail protection?
No. DBLC18CI-7 is specified only for signal-line ESD protection with 18 V reverse working voltage and 20 V minimum breakdown. Its 44 V clamping voltage at 8 A and 250 mW steady-state power dissipation make it unsuitable for sustained overvoltage or surge suppression on power rails.
Is DBLC18CI-7 qualified for automotive applications?
DBLC18CI-7 itself is not AEC-Q200 qualified, but Diodes offers automotive-grade variants (e.g., DBLC18CI-Q) manufactured in IATF 16949-certified facilities with PPAP support. Standard DBLC18CI-7 is intended for commercial and industrial applications unless explicitly qualified and marked as automotive grade.
DBLC18CI-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- SC-76, SOD-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18V (Max)
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 44V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- Ethernet, USB
- Capacitance @ Frequency:
- 0.6pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
DBLC18CI-7 FAQ
1.How can I place an order for DBLC18CI-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DBLC18CI-7 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 DBLC18CI-7 reliable?
The price and inventory of DBLC18CI-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DBLC18CI-7 is usually 5 days.
3.What payment methods are accepted for DBLC18CI-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DBLC18CI-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DBLC18CI-7?
DBLC18CI-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DBLC18CI-7 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 DBLC18CI-7?
For technical support, including DBLC18CI-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DBLC18CI-7 requirements.
6.How does Aetrix verify that DBLC18CI-7 is sourced from the original manufacturer or authorized distributors?
All DBLC18CI-7 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 DBLC18CI-7 meets industry standards.
7.What is the process for return or replacement of DBLC18CI-7?
All DBLC18CI-7 units undergo pre-shipment inspection (PSI). If there is an issue with DBLC18CI-7, 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 DBLC18CI-7 part is unused and in its original packaging.
Return procedure for DBLC18CI-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DBLC18CI-7 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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