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Diodes Incorporated SD15Q-7
- Part No.:
- SD15Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD15Q-7.pdf
- Description:
- GENERAL PROTECTION PP SOD323 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,235
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Product details
Overview
SD15Q-7 from Diodes Incorporated is a unidirectional TVS diode designed for ESD and transient surge protection in high-speed data lines. It features a 15V reverse standoff voltage (VRWM), 16V minimum breakdown voltage (VBR), 21V clamping voltage at 1A, 88pF typical junction capacitance, and 320W peak pulse power rating. It is used to safeguard USB, HDMI, and audio interfaces in portable consumer electronics.
For engineers reviewing the SD15Q-7 datasheet, SD15Q-7 pinout, SD15Q-7 application, or SD15Q-7 equivalent, key selection criteria include low channel capacitance for signal integrity, ±30kV IEC 61000-4-2 ESD robustness, AEC-Q101 qualification for automotive-grade reliability, and SOD323 footprint compatibility with space-constrained PCB layouts.
Technical Context
This TVS diode operates in unidirectional configuration to clamp positive transients only, enabling asymmetric protection on DC-biased signal paths such as USB D+ or HDMI TMDS lines. Its 88pF junction capacitance is measured at 0V reverse bias and 1MHz, ensuring minimal signal distortion in 100Mbps–480Mbps interfaces.
The device delivers 12A peak pulse current under 8/20µs waveform while maintaining clamping voltage ≤27V at full rated current - critical for preserving downstream ICs like USB transceivers or audio codecs rated to 3.3V or 5V supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 15V - Maximum continuous reverse operating voltage before leakage exceeds 1µA; sets upper limit for protected line DC bias. |
| VBR (Min) | 16V - Breakdown initiates at ≥16V under 1mA test current; ensures reliable turn-on above normal operating voltage. |
| VCL @ IPP=1A | 21V - Clamped voltage during 1A transient; keeps protected IC input within safe margin of 3.3V/5V logic rails. |
| CT (Typ) | 88pF - Low capacitance preserves signal edge rate and impedance matching in high-speed digital interfaces. |
| PPP | 320W - Peak power handling under 8/20µs surge; supports IEC 61000-4-5 Level 2 (1kV) lightning immunity. |
| ESD Rating | ±30kV contact/air - Meets highest IEC 61000-4-2 Class 4 level; eliminates need for secondary ESD stages. |
Pinout & Package
Package: SOD323 - ultra-compact surface-mount package (1.30 × 1.70 × 0.90 mm), optimized for high-density portable PCBs. Matte tin-plated alloy 42 leadframe ensures solderability per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Protected Line Input | Connected to signal line requiring ESD clamping; must be DC-biased below VRWM (≤15V). |
| Cathode (Pin 2) | Ground Reference | Connected to low-impedance system ground plane; provides return path for transient current. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD Protection | ±30kV contact/air - eliminates external ESD suppressors in handheld device front-end designs. |
| AEC-Q101 Qualified | Qualified for automotive infotainment and telematics modules requiring change-controlled manufacturing and PPAP support. |
| Ultra-Low Capacitance | 88pF at 0V - enables use on 480Mbps USB 2.0 and 1.65Gbps HDMI 1.4a differential pairs without signal degradation. |
| Green Construction | Halogen- and antimony-free, RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb); meets global environmental compliance mandates. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines in smartphone USB OTG ports against repeated ESD events during cable insertion. IC Role / Device Role / Timing Role: Unidirectional clamping device placed directly at connector, shunting transients to ground before reaching USB PHY. Use Value: 88pF capacitance avoids eye diagram closure; 21V clamping prevents latch-up in 3.3V USB transceivers. | Use Scenario: Safeguarding TMDS clock and data channels in portable media players connected to HDMI displays. IC Role / Device Role / Timing Role: High-speed transient suppressor mounted adjacent to HDMI receptacle, minimizing trace inductance in clamping path. Use Value: 320W peak power rating withstands multiple 8/20µs surges; low capacitance preserves 1.65GHz signal bandwidth. |
| Automotive Infotainment Audio Lines | Industrial Handheld Scanner Interfaces |
Use Scenario: Shielding analog audio inputs (MIC/LINE IN) in vehicle head units from ESD during user interaction with touch panels. IC Role / Device Role / Timing Role: Unidirectional TVS on biased audio path, grounded cathode providing fast response to positive transients. Use Value: AEC-Q101 qualification ensures reliability across -40°C to +125°C ambient; 15V VRWM matches typical audio bias levels. | Use Scenario: Protecting RS-232 or UART lines in rugged barcode scanners exposed to frequent static discharge in warehouse environments. IC Role / Device Role / Timing Role: Primary ESD barrier on serial communication lines, placed between connector and level-shifter IC. Use Value: ±30kV air discharge rating survives repeated handling; SOD323 footprint fits tight 2-layer PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A | DO-214AC package (larger), 15V VRWM, 24.4V VCL @ 10A, 100pF CT | Higher clamping voltage and capacitance; suited for industrial power-line protection, not high-speed data lines | Select when board space allows larger footprint and signal speed <10Mbps. |
| TPD2E007DBVR | Bi-directional dual-channel TVS, 5V VRWM, 15pF CT per channel, 3.3V compatible | Designed for low-voltage, bidirectional data lines (e.g., I²C, GPIO); not rated for 15V bias rails | Choose for 3.3V systems needing dual-line protection with sub-20pF capacitance. |
Compared with SMAJ15A and TPD2E007DBVR, SD15Q-7 uniquely balances 15V operating margin, 88pF capacitance, and SOD323 size - making it optimal for 3.3V/5V high-speed interfaces where VRWM >12V and layout area is constrained.
Availability
SD15Q-7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line protection, and automotive infotainment audio line protection requiring stable component supply across production lifecycles.
Supply support for SD15Q-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 SD15Q belongs to Diodes' TVS Diode product line, engineered specifically for compact, high-reliability ESD protection in portable and automotive electronics where low capacitance and AEC-Q101 compliance are mandatory.
FAQ
Is SD15Q-7 unidirectional or bidirectional?
SD15Q-7 is unidirectional. Its schematic symbol and electrical characteristics - including specified VRWM (15V), VBR (16V min), and single-polarity clamping behavior - confirm operation only against positive transients on the anode-to-cathode path. It is not rated for reverse polarity surge suppression.
What is the maximum operating temperature for SD15Q-7?
The SD15Q-7 has an operating junction temperature range of –65°C to +150°C. Its thermal resistance (RθJA) is 500°C/W on standard FR-4 PCB with 2oz copper, meaning derating begins above +25°C ambient - full 320W pulse rating applies only at TA = +25°C.
Can SD15Q-7 be used on 3.3V logic lines?
No - SD15Q-7 is not recommended for direct protection of 3.3V logic lines. Its 15V VRWM and 16V VBR exceed safe operating margins for 3.3V rails; clamping does not activate until ≥16V, risking damage to downstream ICs. Use lower-VBR devices like TPD2E007DBVR for 3.3V applications.
Does SD15Q-7 require a heatsink for continuous operation?
No heatsink is required. With a maximum steady-state power dissipation of 250mW and RθJA = 500°C/W, junction temperature rise is limited to 125°C above ambient at full DC load - well within its –65°C to +150°C rating. It is intended for transient-only duty, not continuous power dissipation.
SD15Q-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):
- 15V (Max)
- Voltage - Breakdown (Min):
- 16V
- Voltage - Clamping (Max) @ Ipp:
- 27V
- Current - Peak Pulse (10/1000µs):
- 12A (8/20µs)
- Power - Peak Pulse:
- 320W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 88pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD15Q-7 FAQ
1.How can I place an order for SD15Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD15Q-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 SD15Q-7 reliable?
The price and inventory of SD15Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD15Q-7 is usually 5 days.
3.What payment methods are accepted for SD15Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD15Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD15Q-7?
SD15Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD15Q-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 SD15Q-7?
For technical support, including SD15Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD15Q-7 requirements.
6.How does Aetrix verify that SD15Q-7 is sourced from the original manufacturer or authorized distributors?
All SD15Q-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 SD15Q-7 meets industry standards.
7.What is the process for return or replacement of SD15Q-7?
All SD15Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD15Q-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 SD15Q-7 part is unused and in its original packaging.
Return procedure for SD15Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD15Q-7 Tags
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