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Diodes Incorporated SD36CQ-7
- Part No.:
- SD36CQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD36CQ-7.pdf
- Description:
- GENERAL PROTECTION PP SOD323 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:358
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Product details
Overview
SD36CQ-7 from Diodes Incorporated is a bidirectional transient voltage suppression (TVS) diode designed for ESD protection of high-speed data lines in portable electronics. It features a 36 V reverse standoff voltage, 40 V minimum breakdown voltage, 50 V clamping voltage at 1 A, 22 pF typical channel capacitance, and ±30 kV IEC 61000-4-2 contact/air ESD rating - ideal for USB, HDMI, and button interface protection in smartphones and wearables.
For engineers reviewing the SD36CQ-7 datasheet, SD36CQ-7 pinout, SD36CQ-7 application, or SD36CQ-7 equivalent, key selection criteria include low capacitance for signal integrity, bidirectional surge handling up to 4.5 A (8/20 µs), AEC-Q101 qualification for automotive infotainment interfaces, and SOD323 footprint compatibility with space-constrained PCB layouts.
Technical Context
This TVS diode operates in bidirectional clamping mode, enabling symmetric protection against positive and negative transients without polarity dependency. Its low 22 pF junction capacitance minimizes signal distortion on high-frequency lines such as USB 2.0 and audio codecs, while maintaining robust ESD immunity per IEC 61000-4-2 Level 4.
The device uses silicon avalanche technology to achieve precise 40 V breakdown (VBR) at 1 mA and clamps to ≤50 V at 1 A (8/20 µs), delivering predictable voltage limiting during fast-rising ESD events. Thermal design leverages a 500 °C/W junction-to-ambient resistance on standard FR-4 pads, supporting continuous operation up to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 36.0 V - Maximum continuous operating voltage before leakage exceeds 10 nA |
| Breakdown Voltage (VBR) | 40 V min at 1 mA - Ensures reliable triggering above system operating rail |
| Clamping Voltage (VCL) | 50 V max at 1 A (8/20 µs) - Limits transient overvoltage to safe levels for downstream ICs |
| Peak Pulse Current (IPP) | 4.5 A (8/20 µs) - Withstands common lightning-induced surges per IEC 61000-4-5 |
| Channel Capacitance (CT) | 22 pF at 0 V, 1 MHz - Preserves signal rise/fall times on 480 Mbps USB 2.0 lines |
| ESD Rating | ±30 kV air & contact discharge - Meets highest IEC 61000-4-2 Level 4 requirement |
| Operating Temperature | −65 °C to +150 °C - Supports under-hood automotive and industrial environments |
Pinout & Package
Package: SOD323 - ultra-compact surface-mount plastic package (1.30 × 1.70 × 0.90 mm), RoHS-compliant, halogen-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Transient current entry point (negative polarity) | Connects to protected line; conducts during negative ESD events |
| Cathode (Pin 2) | Transient current entry point (positive polarity) | Connects to protected line; conducts during positive ESD events |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables single-device protection of AC-coupled or floating signal paths without polarity constraints |
| Ultra-low 22 pF input capacitance | Maintains <1% signal attenuation at 100 MHz, critical for USB 2.0 and MIPI D-PHY compliance |
| AEC-Q101 qualification | Validated for automotive infotainment, telematics, and ADAS sensor interfaces requiring zero-failure reliability |
| ±30 kV IEC 61000-4-2 ESD immunity | Eliminates need for secondary ESD stages in consumer handheld designs |
| Lead-free, halogen-free "Green" construction | Complies with EU RoHS 3 (2015/863/EU), JIS C0950, and automotive PPAP documentation requirements |
Applications
| USB 2.0 Data Lines | Automotive Infotainment Buttons |
|---|---|
Use Scenario: Protecting D+ and D− lines in smartphone USB ports against repeated plug/unplug ESD events. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector, shunting transients before they reach USB transceiver IC. Use Value: 22 pF capacitance avoids USB 2.0 eye diagram degradation; 50 V clamping prevents PHY latch-up or damage. | Use Scenario: Shielding tactile buttons in car dashboards from human-body-model ESD during driver interaction. IC Role / Device Role / Timing Role: Low-leakage (10 nA) TVS connected between button trace and ground, activated only during >36 V transients. Use Value: AEC-Q101 qualification ensures survival across −40 °C to +105 °C ambient and 1000+ thermal cycles. |
| HDMI Hot-Plug Detection | Industrial Touchscreen Interfaces |
Use Scenario: Guarding HPD (Hot-Plug Detect) and DDC lines in HDMI source devices against insertion surges. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS suppressing 15 kV contact discharges before HDMI controller resets. Use Value: 40 V VBR exceeds HDMI 5 V supply margin; 22 pF avoids skew between TMDS clock and data pairs. | Use Scenario: Securing resistive or capacitive touchscreen controller inputs in factory HMIs exposed to maintenance personnel ESD. IC Role / Device Role / Timing Role: SOD323-footprint TVS mounted adjacent to controller ADC inputs, minimizing trace inductance path to ground. Use Value: 4.5 A IPP withstands multiple 8/20 µs surges per IEC 61000-4-5; 150 °C TJ rating supports sealed enclosure operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-13-F (Diodes Inc.) | Unidirectional; higher 5.0 A IPP; SMA package (4.5 × 2.7 mm) | Requires polarity-aware layout; unsuitable for AC-coupled lines like USB | Select only when protecting DC-biased rails with ample board area |
| TPD2E001DRYR (TI) | 2-channel array; 12 pF CT; lower 3.5 A IPP; same SOD-323 footprint | Offers dual-line protection in one device but lower surge margin | Prefer for multi-line interfaces where capacitance is more critical than peak current |
Compared with SMAJ36A-13-F and TPD2E001DRYR, SD36CQ-7 uniquely balances bidirectional operation, 22 pF capacitance, and 4.5 A surge capability in the smallest SOD323 form factor - making it optimal for single-line, space-limited, high-reliability ESD protection.
Availability
SD36CQ-7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive button ESD hardening, and industrial touchscreen controller safeguarding requiring stable component supply and long-term lifecycle support.
Supply support for SD36CQ-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, specializing in high-reliability protection, power management, and signal integrity solutions for automotive, industrial, and consumer markets.
The SD36CQ belongs to Diodes' TVS Diode family, engineered specifically for ultra-low-capacitance, AEC-Q101-qualified ESD protection in compact portable and automotive electronics.
FAQ
What is the maximum clamping voltage of SD36CQ-7 at 4.5 A?
The SD36CQ-7 clamps to a maximum of 60 V at 4.5 A (8/20 µs waveform), as specified in its Electrical Characteristics table. This value ensures downstream components rated for 65 V absolute maximum survive worst-case surge events without overstress.
Does SD36CQ-7 require external biasing or control signals?
No - SD36CQ-7 is a passive, two-terminal device that operates without biasing, power, or control signals. It remains non-conductive below 36 V and automatically clamps transients above its 40 V breakdown threshold using intrinsic avalanche behavior.
Can SD36CQ-7 be used in place of a unidirectional TVS diode?
Only if the protected circuit is AC-coupled or referenced to a mid-rail voltage. SD36CQ-7's bidirectional structure conducts for both polarities, so it must not replace unidirectional TVS diodes on DC-biased lines unless polarity reversal is guaranteed not to occur.
Is the SOD323 package of SD36CQ-7 compatible with standard reflow profiles?
Yes - SD36CQ-7's SOD323 package meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for standard lead-free reflow profiles (peak temperature ≤260 °C), including ramp rates and dwell times defined in IPC-7095D.
SD36CQ-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):
- 36V (Max)
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 60V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 22pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD36CQ-7 FAQ
1.How can I place an order for SD36CQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD36CQ-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 SD36CQ-7 reliable?
The price and inventory of SD36CQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD36CQ-7 is usually 5 days.
3.What payment methods are accepted for SD36CQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD36CQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD36CQ-7?
SD36CQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD36CQ-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 SD36CQ-7?
For technical support, including SD36CQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD36CQ-7 requirements.
6.How does Aetrix verify that SD36CQ-7 is sourced from the original manufacturer or authorized distributors?
All SD36CQ-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 SD36CQ-7 meets industry standards.
7.What is the process for return or replacement of SD36CQ-7?
All SD36CQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD36CQ-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 SD36CQ-7 part is unused and in its original packaging.
Return procedure for SD36CQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD36CQ-7 Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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