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Diodes Incorporated SD36-7
- Part No.:
- SD36-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SD36-7.pdf
- Description:
- GENERAL PROTECTION PP SOD323 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,272
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Product details
Overview
SD36-7 from Diodes Incorporated is a unidirectional TVS diode designed for ESD protection on single-line power, control, or data interfaces. It delivers 40V minimum breakdown voltage, 5A peak pulse current (8/20µs), 44pF typical channel capacitance, and clamps to 55V at 5A - enabling robust IEC 61000-4-2 ±30kV air/contact ESD protection in space-constrained consumer and medical interfaces.
For engineers reviewing the SD36-7 datasheet, SD36-7 pinout, SD36-7 application, or SD36-7 equivalent, this device is selected for low-capacitance transient suppression in high-speed button, display, and peripheral signal lines where leakage (<1µA at 36V), thermal derating (500°C/W RθJA), and SOD323 footprint compatibility are critical design constraints.
Technical Context
The SD36-7 operates as a unidirectional avalanche clamp with cathode-anode polarity, triggered above 40V VBR to divert ESD transients away from sensitive IC inputs. Its 44pF input capacitance ensures minimal signal distortion on lines up to ~100MHz, while the 55V clamping voltage at 5A limits downstream voltage stress under worst-case IEC 61000-4-2 contact discharge.
Thermally, it sustains 250mW steady-state dissipation on FR-4 with 2oz copper, derating linearly to zero at +150°C ambient. The SOD323 package supports reflow soldering per J-STD-020 Level 1 moisture sensitivity and features matte tin-plated Alloy 42 leads for reliable interconnect integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Min) | 40V - Ensures reliable triggering above 36V standoff, preventing false clamping during normal operation |
| IPP (Max) | 5A (8/20µs) - Withstands full IEC 61000-4-2 contact discharge without degradation |
| CT (Typ) | 44pF @ 0V, 1MHz - Enables use on USB 2.0, HDMI DDC, and touch panel clock/data lines without signal integrity loss |
| VCL @ 5A | 55V - Limits maximum voltage seen by protected IC to safe level during 30kV ESD event |
| IR @ VRWM | 1µA max @ 36V - Minimizes standby power loss and avoids loading of high-impedance sensor or button circuits |
| PPP | 275W (8/20µs) - Provides margin for multiple ESD strikes before parametric shift |
Pinout & Package
Package: SOD323 - Surface-mount plastic package measuring 1.30mm × 1.70mm × 0.90mm (L × W × H), with matte tin-plated Alloy 42 leads, UL 94V-0 rated molding compound, and J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input line connection (cathode-bar side) | Connected to protected signal line; reverse-biased during normal operation |
| Cathode (Pin 2) | GND reference / surge return path | Must be tied to low-impedance system ground to ensure effective clamping and low VCL |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD rating | ±30kV air & contact - Validated immunity for front-panel buttons, touchscreens, and external ports |
| Ultra-low input capacitance | 44pF - Preserves rise time on signals up to 100MHz without added jitter or attenuation |
| Lead-free & RoHS 3 compliant | No intentionally added lead, Br/Cl <900ppm, Sb <1000ppm - Meets global environmental compliance mandates |
| Thermal robustness | RθJA = 500°C/W on standard FR-4 - Supports continuous operation up to +125°C ambient with derating |
Applications
| Computer Peripherals | Medical Equipment Interfaces |
|---|---|
Use Scenario: USB-A/B port ESD protection on keyboards, mice, and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS clamp on VBUS and D+/D− lines. Use Value: Prevents latch-up or gate oxide damage in USB transceivers during hot-plug or handling events. | Use Scenario: Button and encoder ESD protection on patient monitors and infusion pumps. IC Role / Device Role / Timing Role: Single-line transient suppressor on momentary switch inputs. Use Value: Maintains <1µA leakage to avoid false triggers while surviving repeated ±30kV contact discharges. |
| Display Panels | Industrial Switches & Controls |
Use Scenario: Touchscreen controller I²C bus (SDA/SCL) protection in LCD/OLED displays. IC Role / Device Role / Timing Role: Low-capacitance TVS on bidirectional data lines. Use Value: 44pF capacitance avoids signal rounding and timing skew on 400kHz I²C lines. | Use Scenario: Front-panel pushbutton and rotary encoder protection in PLC HMIs and control panels. IC Role / Device Role / Timing Role: Standoff-rated transient suppressor on digital input lines. Use Value: 36V VRWM allows direct placement on 24V logic inputs without false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A | Higher VBR (40–44.4V), higher CT (100pF), SMA package (larger footprint) | Better suited for lower-frequency power rail protection; unsuitable for high-speed data lines | Select when board space permits larger package and signal bandwidth <10MHz |
| ESD9X36-2/TR | Same SOD-323 package, lower VCL (48V @ 5A), slightly higher leakage (2.5µA) | Optimized for tighter clamping on 3.3V–5V logic; less ideal for 24V industrial inputs | Select when protecting 3.3V/5V microcontroller GPIO with priority on lowest possible clamping |
Compared with SMAJ36A and ESD9X36-2/TR, the SD36-7 uniquely balances 44pF capacitance, 36V standoff, and SOD323 size - making it optimal for ESD protection on mixed-voltage (3.3V to 24V) signal lines where layout area and signal fidelity are constrained.
Availability
SD36-7 is available at Aetrix Electronics and suitable for computer peripherals, medical equipment interfaces, and industrial switches requiring stable component supply with guaranteed long-term traceability and RoHS 3 compliance.
Supply support for SD36-7 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 North America.
The SD36-7 belongs to Diodes' PAA-series unidirectional TVS portfolio, engineered specifically for high-reliability, low-capacitance ESD protection in consumer, medical, and industrial human-interface applications.
FAQ
What is the polarity configuration of SD36-7?
The SD36-7 is a unidirectional TVS diode with cathode-bar marking indicating Pin 1 as anode and Pin 2 as cathode. It must be installed with cathode tied to system ground to function correctly as a reverse-biased clamp during overvoltage events.
Does SD36-7 meet automotive qualification standards?
No - SD36-7 is not AEC-Q101 qualified. Diodes offers automotive-grade variants (e.g., APxxxx series) with PPAP capability and IATF 16949 manufacturing; SD36-7 is intended for commercial and industrial applications only.
How does SD36-7 perform under repeated ESD strikes?
Per DS43834 Rev. 2, SD36-7 maintains parametric stability after ≥1000 IEC 61000-4-2 ±30kV contact discharges when mounted per recommended pad layout and operated within thermal limits.
Can SD36-7 protect bidirectional signal lines like USB D+ and D−?
Yes - though unidirectional, SD36-7 can protect each line individually when placed anode-to-signal and cathode-to-ground. For true bidirectional protection, two devices per line or a dedicated bidirectional TVS (e.g., SD05-7) is required.
SD36-7 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):
- 36V (Max)
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 55V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 275W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 44pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SD36-7 FAQ
1.How can I place an order for SD36-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SD36-7 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 SD36-7 reliable?
The price and inventory of SD36-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD36-7 is usually 5 days.
3.What payment methods are accepted for SD36-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD36-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SD36-7?
SD36-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SD36-7 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 SD36-7?
For technical support, including SD36-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD36-7 requirements.
6.How does Aetrix verify that SD36-7 is sourced from the original manufacturer or authorized distributors?
All SD36-7 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 SD36-7 meets industry standards.
7.What is the process for return or replacement of SD36-7?
All SD36-7 units undergo pre-shipment inspection (PSI). If there is an issue with SD36-7, 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 SD36-7 part is unused and in its original packaging.
Return procedure for SD36-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SD36-7 Tags
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