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Diodes Incorporated SD09C-7
- Part No.:
- SD09C-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD09C-7.pdf
- Description:
- TVS DIODE 9VWM 20VC SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,155
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Product details
Overview
SD09C-7 from Diodes Incorporated is a bidirectional 400W transient voltage suppression (TVS) diode designed for ESD protection of high-speed data lines in portable electronics. It features a 9.0V reverse standoff voltage, ±30kV IEC 61000-4-2 contact/air ESD rating, 68pF typical channel capacitance, and SOD323 package - enabling robust protection without signal integrity degradation in USB, audio, or camera interfaces.
For engineers reviewing the SD09C-7 datasheet, SD09C-7 pinout, SD09C-7 application, or SD09C-7 equivalent, key selection criteria include clamping voltage at 20A (20.0V), low leakage (<1µA at 9.0V), thermal derating above +25°C, and compatibility with automated SMT assembly on FR-4 PCBs using standard reflow profiles.
Technical Context
This TVS diode operates in bidirectional avalanche mode to clamp transient surges symmetrically across both polarities, making it suitable for AC-coupled or differential signal paths. Its 68pF junction capacitance at 0V and flat CV curve (Figure 4) ensure minimal distortion on signals up to ~100MHz.
The device meets IEC 61000-4-2 Level 4 (±30kV contact/air) and IEC 61000-4-5 (lightning surge) requirements, with clamping performance validated at 8/20µs pulse waveforms. Thermal resistance of 500°C/W (RθJA) requires careful PCB copper area design per Diodes' SOD323 pad layout guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W (8/20µs waveform; defines maximum single-event surge energy handling) |
| Reverse Standoff Voltage | 9.0V (maximum continuous operating voltage before leakage exceeds 1µA) |
| Breakdown Voltage | 10.0V @ 1mA (guaranteed minimum voltage at which avalanche conduction begins) |
| Clamping Voltage | 20.0V @ 20A (voltage seen by protected circuit during worst-case 8/20µs surge) |
| Channel Capacitance | 68pF @ 0V, 1MHz (low enough for USB 2.0, HDMI DDC, and audio codec interfaces) |
| ESD Rating | ±30kV air & contact (IEC 61000-4-2 Level 4; eliminates need for secondary ESD stages) |
| Package | SOD323 (1.30 × 1.70 × 0.30mm; compatible with 0201-class pick-and-place and reflow) |
Pinout & Package
SOD323 surface-mount package with two terminals: anode and cathode arranged in reversed marking configuration (B/B). Molded green compound, matte tin-plated alloy 42 leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (during positive transients) | Connected to signal line; conducts when voltage exceeds VBR in either polarity |
| Cathode | Transient current sink (during negative transients) | Connected to signal line; enables symmetrical bidirectional clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional ESD protection | Clamps ±30kV transients equally on both signal polarities without polarity-sensitive routing |
| Ultra-low input capacitance | 68pF typical ensures <1% signal attenuation at 100MHz, preserving eye diagram integrity |
| Lead-free & halogen-free construction | Meets RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
| High surge current capability | 20A peak pulse current supports repeated lightning-surge-level events per IEC 61000-4-5 |
Applications
| USB 2.0 Data Lines | Smartphone Camera Interfaces |
|---|---|
Use Scenario: Protecting D+ and D− lines from ESD during cable insertion/removal in handheld devices. IC Role / Device Role: Bidirectional TVS placed directly at connector, shunting ESD current to ground before reaching PHY IC. Use Value: 68pF capacitance avoids USB 2.0 eye mask violations; ±30kV rating eliminates field failures from user-handling ESD. | Use Scenario: Shielding MIPI CSI-2 differential pairs between image sensor and processor from board-level ESD. IC Role / Device Role: Low-capacitance TVS mounted adjacent to sensor flex connector to minimize stub length. Use Value: Symmetrical clamping preserves common-mode rejection; 20.0V clamping at 20A prevents pixel corruption during surge events. |
| Laptop Audio Jacks | Industrial Human-Machine Interface (HMI) |
Use Scenario: Guarding 3.5mm audio jack mic/line-in pins against user-induced ESD in thin-client notebooks. IC Role / Device Role: Single SD09C-7 protecting stereo analog inputs referenced to system ground. Use Value: 9.0V standoff allows full audio swing (±2.5V); 1µA leakage prevents DC bias shift in op-amp front ends. | Use Scenario: Securing touchscreen controller I²C bus lines in factory-floor HMIs exposed to charged personnel. IC Role / Device Role: TVS pair (one per line) placed at edge connector to intercept ESD before entering controller ASIC. Use Value: SOD323 footprint fits tight board space; 400W pulse rating withstands repeated shop-floor ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0A | Unidirectional; 9.0V standoff; 400W; SMA package (4.5×2.7mm) | Requires separate devices per polarity; unsuitable for AC-coupled lines | Select only if polarity is fixed and board space permits larger package |
| TPD2E001DRYR | 2-channel bidirectional; 5.5V standoff; 12pF; 0.65mm × 0.65mm DRY package | Lower capacitance but lower voltage rating; optimized for USB Type-C CC lines | Prefer for high-speed digital interfaces below 6V; not rated for ±30kV |
Compared with SMAJ9.0A and TPD2E001DRYR, SD09C-7 uniquely balances ±30kV ESD immunity, 9.0V standoff for 3.3V/5V systems, and 68pF capacitance in the ultra-compact SOD323 - making it optimal for cost-sensitive, space-constrained portable designs requiring full bidirectional protection.
Availability
SD09C-7 is available at Aetrix Electronics and suitable for cellular handsets, portable electronics, and computers and peripheral designs requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for SD09C-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 SD09C belongs to Diodes' TVS Diode family, engineered specifically for high-reliability ESD protection in consumer and industrial portable equipment where miniaturization and IEC compliance are critical.
FAQ
What is the maximum operating temperature for SD09C-7?
The SD09C-7 has an operating temperature range of −65°C to +150°C. Its power derating curve (Figure 1) shows linear reduction from 250mW at +25°C to zero at +175°C ambient, requiring thermal design consideration for sustained high-temperature environments.
Can SD09C-7 be used on 12V automotive signal lines?
No - SD09C-7's 9.0V reverse standoff voltage and 10.0V breakdown make it unsuitable for 12V nominal systems. For automotive applications, Diodes recommends AEC-Q101-qualified parts like PTVSxP1UP series, which offer higher standoff voltages and extended temperature validation.
How does the "B/B (Reversed)" marking affect PCB layout?
The "B/B (Reversed)" marking indicates cathode-anode orientation is flipped relative to standard SOD323 polarity diagrams. When viewed from top with marking side up, the cathode is on the left - requiring correct footprint mirroring to avoid reverse-bias failure during surge events.
Is SD09C-7 compliant with JEDEC J-STD-020 moisture sensitivity requirements?
Yes - SD09C-7 is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/85% RH and requires no baking prior to standard SMT reflow, simplifying manufacturing logistics.
SD09C-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 9V (Max)
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 20V
- Current - Peak Pulse (10/1000µs):
- 20A (8/20µs)
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 68pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD09C-7 FAQ
1.How can I place an order for SD09C-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD09C-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 SD09C-7 reliable?
The price and inventory of SD09C-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD09C-7 is usually 5 days.
3.What payment methods are accepted for SD09C-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD09C-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD09C-7?
SD09C-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD09C-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 SD09C-7?
For technical support, including SD09C-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD09C-7 requirements.
6.How does Aetrix verify that SD09C-7 is sourced from the original manufacturer or authorized distributors?
All SD09C-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 SD09C-7 meets industry standards.
7.What is the process for return or replacement of SD09C-7?
All SD09C-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD09C-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 SD09C-7 part is unused and in its original packaging.
Return procedure for SD09C-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD09C-7 Tags
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Diodes Incorporated
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