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Diodes Incorporated SD12Q-7
- Part No.:
- SD12Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD12Q-7.pdf
- Description:
- SURGE PROTECTION PP SOD323 T&R 3
- Quantity:
- Payment:
- Shipping:
Inventory:2,790
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Product details
Overview
SD12Q-7 from Diodes Incorporated is a unidirectional transient voltage suppression (TVS) diode designed for ESD protection of high-speed data lines in portable electronics. It features a 12V reverse standoff voltage (VRWM), 13V minimum breakdown voltage (VBR), 15A peak pulse current (IPP), 105pF typical channel capacitance (CT), and ±30kV IEC 61000-4-2 contact/air ESD rating - making it suitable for USB, HDMI, and audio interface protection in smartphones and digital cameras.
For engineers reviewing the SD12Q-7 datasheet, SD12Q-7 pinout, SD12Q-7 application, or SD12Q-7 equivalent, key selection criteria include clamping voltage at 15A (24V), ultra-low capacitance for signal integrity, AEC-Q101 qualification for automotive infotainment interfaces, and SOD323 package compatibility with space-constrained PCB layouts.
Technical Context
This TVS diode operates in unidirectional configuration to protect single-ended I/O lines against fast-rising ESD transients while minimizing capacitive loading. Its 105pF junction capacitance at 0V and 12V VRWM enable use on 480Mbps USB 2.0 and 1080p video signal paths without signal degradation.
The device delivers 360W peak pulse power (8/20µs waveform) with clamping voltage of 24V at 15A, ensuring downstream ICs see suppressed overvoltage during lightning-induced surges per IEC 61000-4-5 Level 2. Thermal resistance of 500°C/W supports operation up to +150°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 12.0V - Maximum continuous reverse operating voltage before leakage exceeds 1µA; sets upper limit for protected line voltage. |
| VBR (min) | 13.0V @ 1mA - Ensures reliable conduction onset above normal signal swing, avoiding false triggering. |
| VCL @ 15A | 24V - Clamped voltage seen by protected IC during worst-case 15A surge; defines maximum stress on downstream circuitry. |
| CT (typ) | 105pF @ 0V, 1MHz - Enables <1% signal attenuation on 480Mbps USB 2.0 differential pairs at 240MHz fundamental frequency. |
| ESD Rating | ±30kV air/contact per IEC 61000-4-2 - Meets highest industrial ESD immunity requirement for handheld device interfaces. |
| PPP | 360W @ 8/20µs - Supports robust protection against indirect lightning surges per IEC 61000-4-5. |
Pinout & Package
Package: SOD323 - surface-mount plastic package measuring 1.30mm × 1.70mm × 0.95mm (L × W × H), optimized for automated placement and reflow soldering on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Protected Line Input | Connected to high-speed signal trace (e.g., USB D+, HDMI TMDS+); conducts surge current to cathode during overvoltage. |
| Cathode (Pin 2) | Ground Reference | Tied to low-inductance system ground plane; provides return path for ESD current with minimal voltage overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD Protection | ±30kV contact/air - eliminates need for external ESD test fixtures during system-level qualification. |
| Ultra-Low Capacitance | 105pF - preserves signal rise/fall times on 480Mbps USB 2.0 and 1.65Gbps HDMI 1.3a links. |
| AEC-Q101 Qualified | Validated for automotive infotainment displays and telematics modules requiring change-controlled manufacturing. |
| Green Packaging | Halogen- and antimony-free, RoHS 3 compliant - meets EU ELV Directive and OEM sustainability requirements. |
Applications
| Smartphone Interface Protection | Digital Camera Video Port |
|---|---|
Use Scenario: Protecting micro-USB 2.0 OTG and headphone jack signal lines from user-handling ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed directly at connector, shunting ESD energy to ground before reaching SoC I/O pins. Use Value: Prevents latch-up and gate oxide damage in smartphone application processors during ±30kV contact discharge events. | Use Scenario: Shielding HDMI Type-D (Micro-HDMI) output from electrostatic discharge during cable insertion/removal. IC Role / Device Role / Timing Role: Low-capacitance TVS on TMDS+/- differential pairs, maintaining signal integrity up to 1080p60 resolution. Use Value: Avoids pixel corruption and display dropouts caused by 105pF loading-induced impedance mismatch on 100Ω differential traces. |
| Automotive Infotainment Display | Portable Medical Monitor Touch Interface |
Use Scenario: Safeguarding LVDS or FPD-Link III video bus between head unit and center-stack display. IC Role / Device Role / Timing Role: AEC-Q101 qualified TVS on each data lane, enabling compliance with ISO 10605 for vehicle-level ESD testing. Use Value: Ensures uninterrupted video transmission during 25kV system-level ESD pulses applied to metal bezels or connectors. | Use Scenario: Protecting projected capacitive (PCAP) touch controller I²C bus and interrupt lines in battery-powered patient monitors. IC Role / Device Role / Timing Role: Low-leakage (1µA @ 12V) TVS preventing false touch detection triggered by ESD-induced noise on sensitive analog front-end. Use Value: Maintains clinical-grade reliability by eliminating spurious touch events during hospital-grade ESD testing per IEC 60601-1-2 Ed. 3.1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | DO-214AC package (4.5mm × 2.7mm); 12V VRWM; 200W PPP; 175pF CT | Larger footprint unsuitable for smartphone PCBs; higher capacitance limits use to lower-speed interfaces like RS-232. | Select when board space permits and signal bandwidth <10MHz. |
| TPD2E001DRYR | 2-channel array in SOT-553; 5V VRWM; 3A IPP; 12pF CT per channel | Lower voltage rating requires series resistors for 12V line protection; optimized for dual-line USB D+/D−. | Choose for cost-sensitive dual-line protection where VRWM ≤5.5V. |
Compared with SMAJ12A and TPD2E001DRYR, SD12Q-7 uniquely balances 12V VRWM, 105pF capacitance, and SOD323 size - enabling direct integration into high-density mobile interfaces without signal integrity compromise or layout redesign.
Availability
SD12Q-7 is available at Aetrix Electronics and suitable for smartphone interface protection, automotive infotainment displays, and portable medical monitor touch interfaces requiring stable component supply across multi-year production cycles.
Supply support for SD12Q-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.
The SD12Q belongs to Diodes' TVS Diode family targeting high-reliability ESD protection in space-constrained consumer and automotive electronics, emphasizing low capacitance, AEC-Q101 qualification, and green packaging compliance.
FAQ
What is the maximum clamping voltage of SD12Q-7 at 15A surge current?
The SD12Q-7 clamps to 24V at 15A peak pulse current (8/20µs waveform), as specified in the Electrical Characteristics table. This value ensures protected ICs experience no more than 24V stress during worst-case ESD events, supporting robust system-level immunity without requiring additional voltage margin.
Is SD12Q-7 suitable for bidirectional signal lines like USB 2.0 differential pairs?
No - SD12Q-7 is unidirectional and must be used with anode tied to the signal line and cathode to ground. For bidirectional protection (e.g., full USB 2.0 D+/D− pair), two SD12Q-7 devices are required per line, or a dedicated bidirectional TVS such as PUSB3FR4 should be selected.
Does SD12Q-7 require derating at elevated ambient temperatures?
Yes - its power dissipation must be derated linearly above +25°C ambient, following the 500°C/W thermal resistance curve. At +85°C ambient, maximum allowable continuous power drops to 125mW, and peak pulse power remains valid only if average power and junction temperature stay within limits per Figure 1.
How does the SOD323 package affect PCB layout for high-frequency signal protection?
The SOD323 footprint (1.30mm × 1.70mm) minimizes parasitic inductance and enables placement within 2mm of the protected connector. Its low-profile construction (<0.95mm height) avoids interference with stacked flex cables, and the recommended pad layout (0.59mm × 0.45mm) maintains controlled 100Ω differential impedance on adjacent traces.
SD12Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- SC-76, SOD-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 15A (8/20µs)
- Power - Peak Pulse:
- 360W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 105pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD12Q-7 FAQ
1.How can I place an order for SD12Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD12Q-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 SD12Q-7 reliable?
The price and inventory of SD12Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD12Q-7 is usually 5 days.
3.What payment methods are accepted for SD12Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD12Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD12Q-7?
SD12Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD12Q-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 SD12Q-7?
For technical support, including SD12Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD12Q-7 requirements.
6.How does Aetrix verify that SD12Q-7 is sourced from the original manufacturer or authorized distributors?
All SD12Q-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 SD12Q-7 meets industry standards.
7.What is the process for return or replacement of SD12Q-7?
All SD12Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD12Q-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 SD12Q-7 part is unused and in its original packaging.
Return procedure for SD12Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD12Q-7 Tags
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