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Diodes Incorporated SD24-7
- Part No.:
- SD24-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD24-7.pdf
- Description:
- TVS DIODE 24VWM 44VC SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:16,087
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Product details
Overview
SD24-7 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 24.0V reverse standoff voltage, 350W peak pulse power (8/20µs), ±30kV IEC 61000-4-2 contact/air ESD rating, 80pF channel capacitance, and SOD323 package - enabling robust protection in space-constrained interfaces like USB, HDMI, and audio ports.
For engineers reviewing the SD24-7 datasheet, SD24-7 pinout, SD24-7 application, or SD24-7 equivalent, this device is selected for low-capacitance, high-surge TVS protection where board space, ESD immunity, and signal integrity are critical - especially in mobile handsets, digital cameras, and peripheral I/O circuits.
Technical Context
The SD24-7 operates as a clamping-type unidirectional TVS diode with avalanche breakdown at 26.0V (min), delivering 34.0V clamping voltage at 1A and up to 44.0V at 8A peak pulse current. Its 80pF capacitance at 0V and 1MHz ensures minimal signal distortion on high-frequency lines.
It meets IEC 61000-4-2 Level 4 (±30kV air/contact) and IEC 61000-4-5 surge immunity, with thermal resistance of 500°C/W and operating temperature range from –65°C to +150°C - validated for use on FR-4 PCBs with standard SOD323 pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 24.0V - Maximum continuous working voltage before clamping begins |
| Breakdown Voltage | 26.0V (min) at 1mA - Ensures reliable triggering above normal operating rail |
| Clamping Voltage | 44.0V at 8A (8/20µs) - Limits transient voltage seen by protected IC during worst-case surge |
| Peak Pulse Power | 350W (8/20µs) - Withstands high-energy transients without failure |
| Channel Capacitance | 80pF at 0V, 1MHz - Low enough for USB 2.0 and audio line integrity |
| ESD Rating | ±30kV contact & air (IEC 61000-4-2) - Full Level 4 system-level ESD immunity |
| Leakage Current | 1µA max at 24V - Negligible standby power loss and signal loading |
Pinout & Package
Package: SOD323 - surface-mount, two-terminal plastic package measuring 1.30mm × 1.70mm × 0.90mm (L × W × H), RoHS-compliant, halogen-free, 0.004g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Signal Input / Line Side | Connected to protected I/O line; conducts during positive transients relative to cathode |
| Cathode (Pin 2) | Reference / Ground Side | Connected to system ground or VSS; defines unidirectional clamping direction (anode-to-cathode only) |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD Protection | ±30kV contact & air - eliminates need for external ESD staging in consumer-grade designs |
| Low Channel Capacitance | 80pF - preserves signal rise/fall times on 480Mbps USB 2.0 and analog audio paths |
| Lead-Free & Green Construction | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - satisfies automotive and EU environmental mandates |
| SOD323 Footprint Compatibility | Standardized 1.3×1.7mm outline - enables drop-in replacement for legacy 24V TVS diodes in existing layouts |
Applications
| USB 2.0 Data Lines | Digital Camera Interface |
|---|---|
Use Scenario: Protecting D+ and D− lines in smartphone USB OTG and charging circuits from ESD events during cable insertion/removal. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed directly at connector, shunting ESD current to ground before it reaches USB transceiver. Use Value: 80pF capacitance avoids signal integrity degradation while maintaining ±30kV IEC 61000-4-2 compliance. | Use Scenario: Safeguarding high-resolution image sensor data outputs (e.g., MIPI CSI-2 lanes) against handling ESD in compact camera modules. IC Role / Device Role / Timing Role: Point-of-entry TVS on each differential pair, leveraging low capacitance to preserve 1–2 Gbps data eye opening. Use Value: 350W peak power rating withstands multiple ESD strikes without parametric shift or failure. |
| Portable Audio Jacks | Industrial Human-Machine Interface |
Use Scenario: ESD protection for 3.5mm TRRS headset jacks in tablets and wearables exposed to frequent user contact. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two SD24-7 devices back-to-back (anode-to-anode), enabling symmetrical ±30kV clamping. Use Value: Low leakage (1µA) prevents DC bias shift on audio amplifiers; SOD323 fits tight jack-side routing. | Use Scenario: Guarding RS-232/UART lines on ruggedized handheld terminals used in warehouse scanning and field service. IC Role / Device Role / Timing Role: Primary transient suppressor on serial interface pins, coordinated with series impedance for IEC 61000-4-5 (lightning) immunity. Use Value: 44.0V clamping at 8A ensures connected microcontroller GPIO remains below absolute maximum ratings during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | DO-214AC package (larger), 400W PPP, 100pF CT, 38.9V clamping at 8A | Higher clamping voltage and capacitance; suited for less speed-sensitive industrial lines | Select when board space allows larger footprint and higher clamping voltage is acceptable |
| TPD2E001DRYR | 2-channel bidirectional array, 15pF per channel, 12V VRWM, 5.5V clamping at 1A | Lower voltage rating and bidirectional operation; optimized for low-voltage logic I/O, not 24V lines | Select only for sub-15V rails requiring ultra-low capacitance; not functionally interchangeable for 24V systems |
Compared with SMAJ24A and TPD2E001DRYR, SD24-7 uniquely balances 24V standoff, 80pF capacitance, and SOD323 size - making it optimal for space-constrained, medium-voltage portable interfaces where signal fidelity and ESD margin must coexist.
Availability
SD24-7 is available at Aetrix Electronics and suitable for cellular handsets, portable electronics, and computers and peripherals requiring stable component supply, consistent ESD performance, and RoHS-compliant sourcing.
Supply support for SD24-7 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 SD24 belongs to Diodes' TVS Diode product line, engineered specifically for compact, high-surge ESD protection in battery-powered portable devices - emphasizing low capacitance, precise voltage thresholds, and green manufacturing compliance.
FAQ
What is the polarity configuration of SD24-7?
SD24-7 is a unidirectional TVS diode with anode (Pin 1) and cathode (Pin 2). It clamps only when the anode is driven positive relative to the cathode - ideal for protecting signals referenced to ground. The bar marking on the SOD323 package denotes Pin 1 (anode).
Can SD24-7 be used for bidirectional protection?
Yes - by connecting two SD24-7 devices in series anode-to-anode (cathodes outward), a symmetrical ±24V clamping structure is formed. This configuration achieves ±30kV IEC 61000-4-2 protection while retaining the 80pF capacitance per path, commonly used for audio jack and USB ID-line protection.
How does SD24-7 perform under elevated ambient temperatures?
SD24-7's power derating follows a linear curve: at 125°C ambient, its peak pulse power drops to ~50% of rated 350W. Its thermal resistance (500°C/W) and -65°C to +150°C operating range ensure functionality in sealed portable enclosures, though layout must follow Diodes' recommended SOD323 pad dimensions for thermal relief.
Is SD24-7 qualified for automotive applications?
No - SD24-7 is not AEC-Q200 qualified. For automotive use, Diodes offers the SD24Q variant, which shares identical electrical specs but undergoes extended temperature cycling, humidity testing, and PPAP documentation per automotive quality requirements.
SD24-7 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):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26V
- Voltage - Clamping (Max) @ Ipp:
- 44V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 80pF @ 1MHz (Max)
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD24-7 FAQ
1.How can I place an order for SD24-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD24-7 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 SD24-7 reliable?
The price and inventory of SD24-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD24-7 is usually 5 days.
3.What payment methods are accepted for SD24-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD24-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD24-7?
SD24-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD24-7 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 SD24-7?
For technical support, including SD24-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD24-7 requirements.
6.How does Aetrix verify that SD24-7 is sourced from the original manufacturer or authorized distributors?
All SD24-7 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 SD24-7 meets industry standards.
7.What is the process for return or replacement of SD24-7?
All SD24-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD24-7, 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 SD24-7 part is unused and in its original packaging.
Return procedure for SD24-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD24-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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