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Diodes Incorporated SD15-7
- Part No.:
- SD15-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD15-7.pdf
- Description:
- GENERAL PROTECTION PP SOD323 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:8,232
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Product details
Overview
SD15-7 from Diodes Incorporated is a unidirectional 320W TVS diode designed for ESD protection on power and signal lines, with 16V minimum breakdown voltage (VBR), 12A peak pulse current (IPP), 90pF typical channel capacitance (CT), and clamping voltage of 21V at 1A-used in display panel data-line surge suppression.
For engineers reviewing the SD15-7 datasheet, SD15-7 pinout, SD15-7 application, or SD15-7 equivalent, key selection criteria include IEC 61000-4-2 ±30kV contact/air discharge compliance, low 90pF input capacitance for high-speed interfaces, unidirectional polarity, SOD323 package thermal resistance (500°C/W), and 250mW steady-state power dissipation.
Technical Context
The SD15-7 operates as a unidirectional transient voltage suppressor with avalanche breakdown at ≥16V, clamping transients to ≤27V under 12A 8/20µs pulses. Its junction capacitance remains stable at 90pF @ 0V, enabling use on USB 2.0 and HDMI DDC lines without signal integrity degradation.
It features a single-anode/cathode configuration in SOD323, with cathode-bar marking (PA5) indicating polarity. Thermal derating follows a linear curve from 250mW at 25°C to zero at 150°C ambient, per FR-4 PCB layout with 2oz copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Min) | 16 V - Ensures reliable conduction onset above 15V system standoff, preventing false triggering during normal operation. |
| IPP (Max) | 12 A - Withstands 8/20µs lightning-surge transients per IEC 61000-4-5 up to 320W peak power. |
| CT (Typ) | 90 pF - Low enough to avoid signal distortion on 480 Mbps USB 2.0 data lines (<1% rise-time degradation). |
| VCL @ 12A | 27 V - Limits downstream IC voltage stress to safe levels during worst-case ESD events. |
| PD | 250 mW - Maximum continuous power dissipation on standard FR-4 PCB, defining thermal design margin. |
| RθJA | 500 °C/W - Junction-to-ambient thermal resistance determines required board copper area for sustained operation. |
Pinout & Package
Package: SOD323 - Surface-mount plastic package with matte tin-plated alloy 42 leadframe, 0.004g weight, UL 94V-0 rated molding compound, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input line connection (protected side) | Connected to signal/power line requiring ESD clamping; reverse-biased during normal operation. |
| Cathode | Ground reference (clamping path) | Connected to system ground plane; provides low-impedance path for transient current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD rating | ±30 kV air/contact - Meets highest industrial ESD immunity requirement without external circuitry. |
| Unidirectional clamping | Single-polarity protection - Prevents forward conduction during normal DC bias, eliminating leakage-induced power loss. |
| Low channel capacitance | 90 pF @ 0V - Enables integration on high-speed differential pairs (e.g., DisplayPort AUX, I²C) without bandwidth reduction. |
| Green packaging | Halogen- and antimony-free, RoHS 3 compliant - Supports environmental compliance for medical and consumer end equipment. |
Applications
| Computer Peripherals | Display Panels |
|---|---|
Use Scenario: USB-C port ESD protection on keyboard/mouse dongles. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient surges on VBUS and CC lines. Use Value: Prevents latch-up or gate oxide damage in USB controller ICs during ±30kV contact discharge events. | Use Scenario: HDMI DDC/CEC line protection in LCD monitor interface boards. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on bidirectional I²C bus lines. Use Value: Maintains 100 kHz I²C timing integrity while suppressing 30kV ESD pulses on hot-plug connections. |
| Medical Equipment | Industrial Switches & Buttons |
Use Scenario: Keypad ESD protection on patient monitor front panels. IC Role / Device Role / Timing Role: Single-line unidirectional clamp on microcontroller GPIO inputs. Use Value: Eliminates firmware reset or ADC offset drift caused by ±30kV air-discharge transients. | Use Scenario: Momentary push-button debounce circuit protection in factory HMIs. IC Role / Device Role / Timing Role: Transient suppressor on RC-filtered switch inputs to MCU interrupt pins. Use Value: Prevents false edge detection and spurious interrupts during electrostatic discharge near control surfaces. |
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 | Higher VBR (16.7V min), higher CT (120pF), SMA package (larger footprint) | Less suitable for space-constrained high-speed interfaces due to larger size and capacitance | Prefer when board layout allows SMA and lower capacitance is not critical |
| TPD1E05U06DPYR | Lower VBR (5.5V), bidirectional, 0.6pF CT, same SOD-323 package | Designed for low-voltage data lines (e.g., USB 3.0, PCIe), not 15V power rail protection | Select only for sub-6V signal lines where ultra-low capacitance outweighs unidirectionality need |
Compared with SMAJ15A and TPD1E05U06DPYR, SD15-7 uniquely balances 15V standoff, 90pF capacitance, and SOD323 size for mid-voltage data/power line protection-making it optimal for HDMI DDC, USB-C VBUS, and industrial keypad interfaces where both ESD robustness and signal fidelity matter.
Availability
SD15-7 is available at Aetrix Electronics and suitable for computer peripherals, display panels, and medical equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SD15-7 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 and manufacturing operations across Asia and the Americas.
The SD15 series belongs to Diodes' TVS diode product line, engineered specifically for high-reliability ESD protection in consumer, industrial, and medical electronics with emphasis on low capacitance and IEC 61000-4-2 compliance.
FAQ
Is SD15-7 unidirectional or bidirectional?
SD15-7 is unidirectional. Its schematic symbol and datasheet specify anode-cathode polarity with cathode-bar marking (PA5), and it conducts only when cathode voltage exceeds anode by ≥16V. It does not protect against negative transients on the anode side-unlike bidirectional TVS devices such as PESD5V0S1BA.
What is the maximum operating temperature for SD15-7?
The SD15-7 has an operating junction temperature range of –65°C to +150°C. Its power derating curve shows full 250mW dissipation at 25°C ambient, linearly decreasing to zero at 150°C ambient when mounted on standard FR-4 with 2oz copper per Diodes' recommended pad layout.
Can SD15-7 be used on USB 2.0 data lines (D+/D–)?
No-SD15-7 is unsuitable for differential USB 2.0 data lines because it is unidirectional and requires separate placement on each line with correct polarity. Its 90pF capacitance also exceeds the <5pF typical limit for full-speed USB 2.0 eye diagram compliance; use bidirectional low-CT arrays like SP1003 instead.
Does SD15-7 meet automotive qualification standards?
No-SD15-7 is not AEC-Q200 qualified. The automotive-grade variant is SD15Q, which appears in a separate datasheet (DS43833) and undergoes additional temperature cycling, humidity testing, and PPAP documentation per automotive requirements.
SD15-7 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:
- General Purpose
- Capacitance @ Frequency:
- 90pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD15-7 FAQ
1.How can I place an order for SD15-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD15-7 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 SD15-7 reliable?
The price and inventory of SD15-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD15-7 is usually 5 days.
3.What payment methods are accepted for SD15-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD15-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD15-7?
SD15-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD15-7 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 SD15-7?
For technical support, including SD15-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD15-7 requirements.
6.How does Aetrix verify that SD15-7 is sourced from the original manufacturer or authorized distributors?
All SD15-7 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 SD15-7 meets industry standards.
7.What is the process for return or replacement of SD15-7?
All SD15-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD15-7, 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 SD15-7 part is unused and in its original packaging.
Return procedure for SD15-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD15-7 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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