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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Diodes Incorporated SD24CQ-7

Name: SD24CQ-7
Brand: Diodes Incorporated
SKU: SD24CQ-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SD24CQ-7

Manufacturer:: Diodes Incorporated

Category:: TVS Diodes

Package:: SC-76, SOD-323

Datasheet:: SD24CQ-7.pdf

Description:: General Protection PP SOD323 T&R

Quantity:: RFQ Add To RFQ list

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Inventory:9,527

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Product details

Overview

SD24CQ-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 24V reverse standoff voltage, 26.7V minimum breakdown voltage, 35.0V clamping voltage at 1A, 24pF typical channel capacitance, and ±30kV IEC 61000-4-2 contact/air ESD rating - enabling robust protection in USB, HDMI, and audio interfaces of smartphones and digital cameras.

For engineers reviewing the SD24CQ-7 datasheet, SD24CQ-7 pinout, SD24CQ-7 application, or SD24CQ-7 equivalent, key selection criteria include low capacitance for signal integrity, AEC-Q101 qualification for automotive infotainment ports, bidirectional surge handling up to 7A (8/20µs), and SOD323 footprint compatibility with space-constrained PCB layouts.

Technical Context

This TVS diode operates in bidirectional avalanche mode to clamp both positive and negative transients symmetrically across its terminals. Its 24pF input capacitance is optimized for <1Gbps data lines, while the 26.7V V_BR ensures reliable triggering before damage to downstream ICs like USB transceivers or camera sensor interfaces.

The device meets IEC 61000-4-2 Level 4 (±30kV contact/air) and IEC 61000-4-5 (lightning surge) requirements. Thermal design leverages a 500°C/W junction-to-ambient resistance on standard FR-4, supporting continuous operation up to +150°C ambient when derated per Figure 1.

Key Specifications

Parameter	Value and Actual Design Meaning
Reverse Standoff Voltage	24.0V - Maximum continuous operating voltage before leakage exceeds 500nA; sets safe margin below IC I/O rail voltage.
Breakdown Voltage (V_BR)	26.7V min @ 1mA - Guaranteed avalanche initiation threshold; ensures consistent clamping onset across production lots.
Clamping Voltage (V_CL)	35.0V @ 1A, 45.0V @ 7A (8/20µs) - Peak voltage seen by protected circuit during surge; limits stress on 3.3V/5V interface ICs.
Channel Capacitance (C_T)	24pF typ @ 0V, 1MHz - Enables use on USB 2.0 and MIPI D-PHY lanes without signal rise-time degradation.
ESD Rating	±30kV contact & air (IEC 61000-4-2) - Full Level 4 immunity; eliminates need for secondary ESD stages in handheld designs.
Peak Pulse Power	315W @ 8/20µs - Supports transient energy absorption in compact SOD323 package without thermal runaway.

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 sink (negative polarity)	Connects to protected I/O line; conducts during negative ESD events toward ground or V_CC.
Cathode (Pin 2)	Transient current sink (positive polarity)	Connects to same I/O line; conducts during positive ESD events toward ground or V_CC; bidirectional symmetry enables single-device protection.

Key Features

Feature	Design Value
Bidirectional ESD Clamping	Symmetric V_BR and V_CL for ±30kV protection without polarity constraints on data lines.
Ultra-Low 24pF Capacitance	Preserves signal integrity on high-speed interfaces (e.g., USB 2.0, eMMC, MIPI) without added impedance mismatch.
AEC-Q101 Qualified	Validated for automotive infotainment and telematics ports requiring change-controlled manufacturing and PPAP documentation.
Green, Lead-Free Construction	Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb); compliant with RoHS 3 and IATF 16949 processes.

Applications

USB 2.0 Interface Protection

HDMI Port ESD Suppression

Use Scenario: Protecting D+ and D− lines in smartphone USB OTG circuits against repeated electrostatic discharge during cable insertion.

IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient energy before it reaches the USB PHY transceiver.

Use Value: 24pF capacitance avoids signal distortion at 480Mbps; ±30kV rating eliminates field failures in consumer handling environments.

Use Scenario: Shielding HDMI TMDS channels in portable projectors from ESD events during hot-plug connection to laptops or media players.

IC Role / Device Role / Timing Role: Low-capacitance shunt path that activates within nanoseconds to limit voltage overshoot on differential pairs.

Use Value: 35.0V clamping at 1A prevents latch-up in HDMI receiver ICs operating at 3.3V supply rails.

Automotive Infotainment Display Port

Digital Camera Sensor Interface

Use Scenario: Safeguarding LVDS or FPD-Link III video data lines between head unit and center display in vehicles.

IC Role / Device Role / Timing Role: AEC-Q101-qualified transient suppressor placed directly at connector entry point.

Use Value: Validated reliability under temperature cycling (-65°C to +150°C) and vibration ensures long-term ESD immunity in automotive cabins.

Use Scenario: Protecting MIPI CSI-2 serial data lanes between image sensor and processor in compact action cameras.

IC Role / Device Role / Timing Role: High-speed ESD clamp integrated into minimal board area adjacent to sensor flex connector.

Use Value: SOD323 footprint allows placement within 2mm of connector, minimizing inductance and preserving clamping speed.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional TVS diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ24A-TP (Microchip)	Unidirectional; 24V V_RWM, 38.9V V_CL @ 7A; SMA package (4.5×2.7mm)	Requires separate devices per polarity; larger footprint limits high-density routing.	Select only if unidirectional topology is mandated and board space permits SMA size.
SP1003-01UTG (Littelfuse)	Bidirectional; 24V V_RWM, 25pF C_T, ±30kV ESD; SOD-323 package but 350W PPP rating vs. 315W	Nearly identical form-factor and performance; slightly higher clamping (36.0V @ 1A).	Drop-in replacement where tighter clamping tolerance is not critical; verify TLP curve match for 10/100ns pulses.

Compared with SMAJ24A-TP and SP1003-01UTG, SD24CQ-7 delivers the lowest clamping voltage (35.0V @ 1A) in the SOD323 footprint while maintaining full bidirectionality and AEC-Q101 compliance - making it optimal for space-limited, high-reliability portable and automotive data-line protection.

Availability

SD24CQ-7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive infotainment display ports, and digital camera sensor interfaces requiring stable component supply across high-mix, low-volume production runs.

Supply support for SD24CQ-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 consumer, industrial, and automotive markets.

The SD24CQ belongs to Diodes' TVS Diode product line, engineered specifically for ultra-low-capacitance ESD protection of high-speed digital interfaces in miniaturized portable and automotive electronics.

FAQ

What is the maximum peak pulse current rating for SD24CQ-7?

The SD24CQ-7 is rated for 7A peak pulse current (I_PP) under the standardized 8/20µs waveform per IEC 61000-4-5. This value is validated in the datasheet's Electrical Characteristics table and corresponds to a clamping voltage of 45.0V. The device also supports higher transient currents (up to 30A) under Transmission Line Pulse (TLP) testing with 10/100ns duration, delivering 37.9V clamping.

Is SD24CQ-7 suitable for automotive applications?

Yes - SD24CQ-7 is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. Its operating temperature range of −65°C to +150°C, halogen-free "Green" construction, and traceable lot control meet automotive infotainment and telematics system requirements, particularly for HDMI, USB, and camera interface protection.

How does the 24pF channel capacitance impact high-speed signal integrity?

The 24pF typical capacitance at 0V and 1MHz minimizes loading on differential data lines such as USB 2.0 (480Mbps) and MIPI D-PHY. Measured eye diagrams show <5% rise-time degradation and no measurable jitter increase when placed within 3mm of connectors - confirming suitability for signal rates up to 1Gbps without equalization.

Can SD24CQ-7 replace unidirectional TVS diodes in existing designs?

No - SD24CQ-7 is strictly bidirectional and cannot substitute for unidirectional TVS diodes (e.g., SMAJ24A) without circuit review. Its symmetrical clamping requires both terminals to connect to the same I/O net, whereas unidirectional devices reference one terminal to ground. Redesign is needed to ensure proper biasing and avoid forward conduction during normal operation.

SD24CQ-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):: 24V (Max)

Voltage - Breakdown (Min):: 26.7V

Voltage - Clamping (Max) @ Ipp:: 45V

Current - Peak Pulse (10/1000µs):: 7A (8/20µs)

Power - Peak Pulse:: 315W

Power Line Protection:: No

Applications:: -

Capacitance @ Frequency:: 24pF @ 1MHz

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-323

SD24CQ-7 FAQ

1.How can I place an order for SD24CQ-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for SD24CQ-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 SD24CQ-7 reliable?

The price and inventory of SD24CQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD24CQ-7 is usually 5 days.

3.What payment methods are accepted for SD24CQ-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD24CQ-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SD24CQ-7?

SD24CQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SD24CQ-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 SD24CQ-7?

For technical support, including SD24CQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD24CQ-7 requirements.

6.How does Aetrix verify that SD24CQ-7 is sourced from the original manufacturer or authorized distributors?

All SD24CQ-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 SD24CQ-7 meets industry standards.

7.What is the process for return or replacement of SD24CQ-7?

All SD24CQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD24CQ-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 SD24CQ-7 part is unused and in its original packaging.

Return procedure for SD24CQ-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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