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onsemi SZSD05T3G
- Part No.:
- SZSD05T3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZSD05T3G.pdf
- Description:
- ESD PROTECTION DIODE, UNIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:4,070
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Product details
Overview
SZSD05T3G from onsemi is a unidirectional ESD protection diode in SOD-323 package, rated for 5.0 V working peak reverse voltage (VRWM), 9.8 V clamping voltage at 5 A peak pulse current (VC), and 350 W peak power dissipation (8/20 µs). It meets IEC61000-4-2 Level 4 (±15 kV air, ±8 kV contact), IEC61000-4-4 Level 4 (40 A), and 30 kV HBM ESD, and is qualified to AEC-Q101 for automotive use.
For engineers reviewing the SZSD05T3G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 5 A transient surge, low 350 pF capacitance at 0 V bias, compliance with automotive-grade ESD and EFT standards, and compatibility with high-density PCB layouts requiring minimal board space.
Technical Context
This device operates as a unidirectional TVS diode, leveraging silicon avalanche breakdown to clamp transients above its 6.2–7.3 V breakdown voltage (VBR) while maintaining low leakage (<10 nA at VRWM). Its thermal resistance (RJA = 416 °C/W) and 300 mW steady-state power rating support continuous operation on FR-4 boards with 1 cm² copper pad.
The SOD-323 package enables surface-mount integration with 100% matte tin lead finish, MSL 1 reflow compatibility (260 °C), and polarity band marking for cathode identification-critical for correct orientation in USB, HDMI, and automotive sensor interface protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 6.2 V / 7.3 V - Breakdown initiates within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPP = 5 A | 9.8 V - Clamped voltage during 8/20 µs surge, limiting downstream IC stress |
| Peak Power (8/20 µs) | 350 W - Transient energy absorption capability without failure |
| Capacitance @ 0 V | 350 pF - Signal integrity impact on high-speed lines like USB 2.0 or CAN FD |
| Leakage @ VRWM | <10 nA - Negligible DC loading on sensitive analog or battery-powered inputs |
| ESD Rating (HBM) | 30 kV - Robustness against human-body model discharge events |
Pinout & Package
SZSD05T3G is housed in a compact SOD-323 (Case 477) surface-mount package measuring 1.70 × 1.25 × 0.85 mm, with void-free thermosetting plastic molding and UL 94 V-0 epoxy. Polarity is indicated by a cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to system ground or low-impedance return path; clamps positive transients to GND |
| 2 (Non-banded End) | Anode | Connected to protected signal line; conducts during overvoltage to divert current away from IC |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment, ADAS sensors, and body control modules |
| IEC61000-4-2 Level 4 Compliance | Withstands ±15 kV air-gap and ±8 kV contact ESD without degradation |
| Low Clamping Voltage (9.8 V @ 5 A) | Protects 5 V logic interfaces (e.g., UART, I²C, LIN) without violating IC absolute maximum ratings |
| Pb-Free & RoHS Compliant | Meets global environmental regulations and supports lead-free reflow assembly processes |
| MSL 1 Rating | Zero floor life limitation; safe for unlimited exposure to ambient conditions prior to reflow |
Applications
| USB 2.0 Port Protection | Automotive Sensor Interface |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports against ESD events during hot-plug insertion. IC Role / Device Role: Unidirectional TVS diode placed between data line and chassis ground to shunt ESD current. Use Value: 350 pF capacitance avoids signal integrity loss at 480 Mbps; 9.8 V clamping ensures USB transceiver safety. | Use Scenario: Safeguarding LIN bus or analog sensor outputs (e.g., temperature, pressure) in engine control units. IC Role / Device Role: ESD suppressor on signal path between sensor and microcontroller ADC input. Use Value: AEC-Q101 qualification and −55 °C to +150 °C operating range ensure reliability under under-hood thermal cycling. |
| HDMI DDC Channel Protection | Industrial Control I/O |
Use Scenario: Shielding HDMI DDC (I²C-based) lines from ESD during cable connection in digital signage systems. IC Role / Device Role: Low-capacitance TVS on 3.3 V I²C clock/data lines to preserve rise/fall times. Use Value: Sub-10 nA leakage prevents pull-up resistor loading; 5.0 V VRWM matches standard I²C voltage rails. | Use Scenario: Protecting 24 V industrial PLC digital inputs from field-induced surges and operator ESD. IC Role / Device Role: Front-end transient suppressor on optocoupler input side or discrete transistor base drive. Use Value: 350 W peak power rating handles repetitive EFT bursts per IEC61000-4-4 Level 4 (40 A). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF5.0A (onsemi) | Same SOD-123 package; higher 1000 W peak power but 500 pF capacitance | Better for higher-energy surges; less suitable for >100 Mbps data lines due to higher CJ | Select when surge energy exceeds 350 W and signal speed ≤ 480 Mbps |
| TPD2E001DRYR (TI) | 0.65 mm × 0.65 mm DRY package; dual-channel; 12 pF typical capacitance | Optimized for ultra-high-speed interfaces (e.g., USB 3.0, MIPI); not AEC-Q101 qualified | Select for space-constrained, high-speed consumer electronics where automotive qualification is unnecessary |
Compared with SMF5.0A and TPD2E001DRYR, SZSD05T3G uniquely balances automotive qualification, moderate capacitance (350 pF), and compact SOD-323 footprint-making it optimal for cost-sensitive, thermally constrained 5 V interface protection in automotive and industrial edge nodes.
Availability
SZSD05T3G is available at Aetrix Electronics and suitable for USB port protection, automotive sensor interfaces, HDMI DDC channel safeguarding, and industrial PLC I/O conditioning requiring stable component supply across production lifecycles.
Supply support for SZSD05T3G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
SZSD05T3G belongs to the SD05T1/SZSD05T1 series of unidirectional ESD protection diodes engineered specifically for space-constrained, high-reliability interfaces in automotive and industrial environments.
FAQ
What is the clamping voltage of SZSD05T3G at 5 A peak pulse current?
The clamping voltage of SZSD05T3G is 9.8 V when subjected to a 8/20 µs transient pulse at 5 A peak current. This value is measured under standardized IEC61000-4-5 test conditions and ensures that downstream 5 V logic components remain within their absolute maximum voltage ratings during ESD or surge events. The low clamping level directly contributes to robust system-level immunity without requiring additional voltage margin in the protected circuit design. SZSD05T3G maintains this performance across its full operating temperature range.
Is SZSD05T3G qualified for automotive applications?
Yes, SZSD05T3G is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive electronic systems including infotainment, body control modules, and sensor interfaces. The "SZ" prefix explicitly denotes devices manufactured under automotive-specific process controls and site qualifications. SZSD05T3G operates reliably from −55 °C to +150 °C and meets stringent automotive ESD (IEC61000-4-2 Level 4), EFT (IEC61000-4-4 Level 4), and lightning surge (IEC61000-4-5) requirements. SZSD05T3G is designed for long-term deployment in harsh vehicular environments.
What is the package type and dimensions of SZSD05T3G?
SZSD05T3G uses the SOD-323 (Case 477) surface-mount package, measuring 1.70 mm × 1.25 mm × 0.85 mm. It features a polarity band indicating the cathode terminal and employs 100% matte tin lead finish compatible with lead-free reflow soldering up to 260 °C. The package is rated MSL 1, meaning no dry-pack or floor-life restrictions apply. This compact footprint makes SZSD05T3G ideal for high-density PCB layouts where board space is constrained, such as portable medical devices or automotive ECUs. SZSD05T3G's mechanical construction meets UL 94 V-0 flammability standards.
Does SZSD05T3G meet IEC61000-4-2 Level 4 ESD requirements?
Yes, SZSD05T3G fully complies with IEC61000-4-2 Level 4, delivering ±15 kV air discharge and ±8 kV contact discharge protection. This certification is verified per the manufacturer's datasheet and applies across the full temperature range (−55 °C to +150 °C). The device achieves this through controlled avalanche breakdown characteristics and low dynamic impedance during fast transients. SZSD05T3G's performance remains stable after repeated ESD strikes, supporting long-term reliability in user-accessible interfaces such as USB ports, display connectors, and diagnostic jacks. SZSD05T3G also satisfies 30 kV Human Body Model testing.
What is the maximum steady-state power dissipation of SZSD05T3G?
SZSD05T3G has a maximum steady-state power dissipation of 300 mW at 25 °C ambient temperature, derating linearly at 2.4 mW/°C above that point. This rating assumes mounting on a standard FR-4 PCB with a 1 cm² copper pad, per JEDEC JESD51-3 guidelines. The thermal resistance junction-to-ambient (RJA) is 416 °C/W, enabling reliable operation in thermally isolated sections of industrial control boards or automotive modules. SZSD05T3G's low power handling reflects its role as a transient suppressor-not a continuous power device-and aligns with its intended duty cycle of infrequent surge events.
SZSD05T3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-76, SOD-323
- Series:
- SZSD05T1
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.2V
- Voltage - Clamping (Max) @ Ipp:
- 9.8V
- Current - Peak Pulse (10/1000µs):
- 24A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 350pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZSD05T3G FAQ
1.How can I place an order for SZSD05T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZSD05T3G 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 SZSD05T3G reliable?
The price and inventory of SZSD05T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZSD05T3G is usually 5 days.
3.What payment methods are accepted for SZSD05T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZSD05T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZSD05T3G?
SZSD05T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZSD05T3G 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 SZSD05T3G?
For technical support, including SZSD05T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZSD05T3G requirements.
6.How does Aetrix verify that SZSD05T3G is sourced from the original manufacturer or authorized distributors?
All SZSD05T3G 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 SZSD05T3G meets industry standards.
7.What is the process for return or replacement of SZSD05T3G?
All SZSD05T3G units undergo pre-shipment inspection (PSI). If there is an issue with SZSD05T3G, 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 SZSD05T3G part is unused and in its original packaging.
Return procedure for SZSD05T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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