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Diodes Incorporated SD03CQ-7
- Part No.:
- SD03CQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD03CQ-7.pdf
- Description:
- Surge Protection PP SOD323 T&R 3
- Quantity:
- Payment:
- Shipping:
Inventory:1,208
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Product details
Overview
SD03CQ-7 from Diodes Incorporated is a bidirectional 600W transient voltage suppression (TVS) diode designed for ESD protection of high-speed data lines in portable electronics. It features a 4V minimum breakdown voltage, 55A peak pulse current (8/20µs), 150pF typical channel capacitance, and ±30kV IEC 61000-4-2 contact/air ESD rating - deployed in USB, HDMI, and audio interfaces of smartphones and digital cameras.
For engineers reviewing the SD03CQ-7 datasheet, SD03CQ-7 pinout, SD03CQ-7 application, or SD03CQ-7 equivalent, key selection criteria include clamping voltage at 55A (11V), low leakage (<1µA at 3.3V), AEC-Q101 qualification, SOD323 footprint compatibility, and automotive-grade manufacturing traceability.
Technical Context
This TVS diode operates in bidirectional avalanche mode to clamp transient overvoltages symmetrically across both polarities. Its 3.3V reverse standoff voltage ensures compatibility with 3.3V I/O rails, while the 6.5V clamping voltage at 1A enables robust protection without signal distortion in high-speed interfaces.
The device uses a planar junction structure in a molded SOD323 package with matte tin-plated alloy-42 leads. Thermal resistance of 500°C/W and 250mW steady-state power dissipation are specified under FR-4 PCB mounting per Diodes' standard pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W (8/20µs waveform; sustains lightning surge per IEC 61000-4-5) |
| Breakdown Voltage (VBR) | 4.0V min at 1mA (ensures reliable triggering before 3.3V rail damage) |
| Clamping Voltage (VCL) | 11V max at 55A (limits downstream IC stress during worst-case surge) |
| Channel Capacitance (CT) | 150pF typ at 0V, 1MHz (preserves signal integrity on USB 2.0 and audio lines) |
| ESD Rating | ±30kV air & contact (IEC 61000-4-2; exceeds Level 4 immunity requirement) |
| Leakage Current (IRM) | <1µA at 3.3V (minimizes standby power loss in battery-powered devices) |
Pinout & Package
Package: SOD323 - surface-mount plastic case, 0.004g weight, 2.5mm × 1.3mm footprint, 0.3mm lead width, RoHS-compliant green molding compound (UL 94V-0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode (for one polarity) | Acts as cathode when reverse-biased; forms symmetrical clamping path with Pin 2 |
| Pin 2 | Cathode (for one polarity) | Acts as anode when reverse-biased; enables bidirectional ESD current shunting |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or differential lines (e.g., USB D+/D−, HDMI TMDS) without polarity constraints |
| AEC-Q101 qualification | Validated for automotive infotainment and ADAS sensor interfaces requiring change-controlled production |
| Ultra-low 150pF capacitance | Enables use on 480Mbps USB 2.0 channels with <0.5dB insertion loss at 240MHz |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and automotive "Green" standards (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: ESD events on smartphone USB ports during cable insertion or handling. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector to shunt ±30kV ESD transients before reaching PHY IC. Use Value: 150pF capacitance avoids signal rise-time degradation; 11V clamping prevents PHY latch-up or oxide rupture. | Use Scenario: Static discharge on HDMI hot-plug pins in set-top boxes or tablets. IC Role / Device Role / Timing Role: Parallel-connected TVS on TMDS clock/data pairs to suppress fast-rising ESD pulses. Use Value: Symmetrical clamping maintains differential signal balance; 4V VBR avoids false triggering during 3.3V logic swings. |
| Automotive Infotainment Display Port | Digital Camera Audio Jack ESD Guard |
Use Scenario: ESD exposure on LVDS or FPD-Link II video interface connectors in dash displays. IC Role / Device Role / Timing Role: AEC-Q101-qualified TVS mounted at board edge to protect display driver IC inputs. Use Value: IATF 16949 manufacturing traceability ensures supply continuity; 600W surge rating handles ISO 10605 pulses. | Use Scenario: Human-body-model discharges on 3.5mm audio jack contacts in portable recorders. IC Role / Device Role / Timing Role: Low-capacitance TVS on left/right/ground lines to prevent pop-noise and codec damage. Use Value: Sub-1µA leakage preserves battery life; 150pF avoids high-frequency attenuation in 20kHz audio band. |
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 | Unidirectional; 3.3V VRWM, 100pF CT, SMA package (larger footprint) | Requires external polarity management; unsuitable for AC-coupled lines | Select only if unidirectional protection suffices and board space allows SMA |
| SP1003-030 | 3.3V VRWM, 12pF CT, 30kV ESD, SOD-323 but non-automotive grade | Lacks AEC-Q101 qualification and IATF 16949 traceability | Prefer for cost-sensitive consumer designs where automotive compliance is not required |
Compared with SMAJ3.3A and SP1003-030, SD03CQ-7 uniquely combines bidirectional operation, AEC-Q101 qualification, and 150pF capacitance in SOD323 - making it optimal for space-constrained automotive and portable USB/HDMI protection where polarity-agnostic clamping and supply chain rigor are mandatory.
Availability
SD03CQ-7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line hardening, and automotive infotainment display port safeguarding requiring stable component supply across high-volume production cycles.
Supply support for SD03CQ-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 the Americas.
The SD03CQ belongs to Diodes' protected interface product line, engineered specifically for high-reliability ESD suppression in portable, automotive, and industrial connectivity applications where low capacitance and AEC-Q101 compliance are critical.
FAQ
What is the maximum clamping voltage of SD03CQ-7 at 55A?
The maximum clamping voltage is 11V at 55A peak pulse current (8/20µs waveform), measured from cathode to anode per Figure 5 in DS43352 Rev. 1–2. This value ensures downstream 3.3V logic ICs remain within absolute maximum ratings during worst-case surge events.
Is SD03CQ-7 suitable for automotive applications?
Yes - SD03CQ-7 is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. Its qualification covers temperature cycling, mechanical shock, and ESD robustness testing required for infotainment, telematics, and ADAS sensor interfaces.
How does the 150pF channel capacitance affect high-speed signal integrity?
At 150pF, SD03CQ-7 introduces minimal loading on 480Mbps USB 2.0 signals: insertion loss remains below 0.5dB up to 240MHz, and eye diagram jitter increase is less than 10% versus unprotected traces - verified via TLP and network analyzer measurements in Diodes' application notes.
What is the reverse standoff voltage and why does it matter?
The reverse standoff voltage (VRWM) is 3.3V - the maximum continuous DC voltage the device blocks without significant leakage. This matches standard 3.3V I/O rails, ensuring the TVS remains inactive during normal operation while triggering reliably above 4.0V breakdown during transients.
SD03CQ-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):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 4V
- Voltage - Clamping (Max) @ Ipp:
- 11V
- Current - Peak Pulse (10/1000µs):
- 55A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 150pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD03CQ-7 FAQ
1.How can I place an order for SD03CQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD03CQ-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 SD03CQ-7 reliable?
The price and inventory of SD03CQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD03CQ-7 is usually 5 days.
3.What payment methods are accepted for SD03CQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD03CQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD03CQ-7?
SD03CQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD03CQ-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 SD03CQ-7?
For technical support, including SD03CQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD03CQ-7 requirements.
6.How does Aetrix verify that SD03CQ-7 is sourced from the original manufacturer or authorized distributors?
All SD03CQ-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 SD03CQ-7 meets industry standards.
7.What is the process for return or replacement of SD03CQ-7?
All SD03CQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD03CQ-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 SD03CQ-7 part is unused and in its original packaging.
Return procedure for SD03CQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD03CQ-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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