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onsemi SZSL05T1G
- Part No.:
- SZSL05T1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZSL05T1G.pdf
- Description:
- TVS DIODE 5VWM 11VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SZSL05T1G from onsemi is a unidirectional ESD protection diode in SOT-23 package, designed for high-speed I/O lines with 5.0 V working peak reverse voltage, <5 pF junction capacitance at 1 MHz, 300 W peak pulse power (8 × 20 µs), and IEC 61000-4-2 Level 4 (±8 kV contact) compliance. It protects USB 2.0, HDMI, and Ethernet PHY interfaces against transient overvoltage.
For engineers reviewing the SZSL05T1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage (9.8 V @ 1 A), low leakage (<20 µA @ 5 V), thermal resistance (556 °C/W on FR-5), AEC-Q101 qualification, and UL 94 V-0 flammability rating.
Technical Context
The SZSL05T1G integrates a surge protection diode in series with a compensating diode to achieve sub-5 pF capacitance-enabling use on >480 Mbps data lines without signal integrity degradation. Its unidirectional architecture provides reverse-biased clamping during positive transients while forward-biasing the compensating diode to shunt current to ground.
It operates within −55 °C to +150 °C junction temperature range, supports 260 °C/10 s soldering, and delivers 11 V clamping voltage at 5 A peak pulse current. The device is Pb-free, halogen-free/BFR-free, and RoHS compliant per onsemi's SL05T1G Series specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.0 V - Maximum continuous reverse voltage before leakage exceeds 20 µA; sets safe operating margin for 3.3 V or 5 V I/O rails. |
| VC @ IPP = 1 A | 9.8 V - Clamping voltage limits downstream IC stress during ESD events; ensures logic-level compatibility with 12 V tolerant receivers. |
| CJ @ 0 V, 1 MHz | 3.5 pF (typ), 5.0 pF (max) - Enables full-speed USB 2.0 (480 Mbps) and HDMI 1.4a compliance without insertion loss or eye diagram distortion. |
| Ppk @ 8 × 20 µs | 300 W - Withstands multiple IEC 61000-4-5 lightning surges (12 A) without degradation when properly laid out. |
| IEC 61000-4-2 | ±8 kV contact, ±16 kV air - Meets industrial and automotive ESD immunity requirements per AEC-Q101 test plan. |
| RJA (FR-5) | 556 °C/W - Requires minimal copper pour for thermal management in compact PCB layouts with limited heatsinking. |
Pinout & Package
SOT-23 (TO-236) package, void-free thermosetting plastic case, UL 94 V-0 rated, optimized for automated placement and reflow. Dimensions: 2.9 mm × 1.3 mm × 1.0 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to protected I/O line; forward-biased during negative transients to clamp to ground. |
| 2 | Cathode | Connected to system ground; reverse-biased during positive transients to initiate avalanche clamping. |
| 3 | No Connect (NC) | Internally isolated terminal; no PCB trace or pad required; must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Series-compensated diode topology | Reduces effective junction capacitance to ≤5 pF-critical for preserving signal rise/fall times on high-speed serial links. |
| AEC-Q101 qualified | Validated for automotive infotainment and ADAS interfaces requiring extended temperature operation and reliability screening. |
| Bi-directional protection capability | Two SZSL05T1G devices in inverse-parallel provide ±8 kV ESD protection on unidirectional or bidirectional buses. |
| UL 94 V-0 flammability rating | Ensures flame propagation resistance in enclosed consumer and industrial enclosures under fault conditions. |
Applications
| USB 2.0 Data Lines | HDMI DDC/CEC Channels |
|---|---|
Use Scenario: Protecting differential USB 2.0 D+ and D− lines from ESD events during hot-plug insertion in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed directly at connector, clamping surges before reaching USB transceiver PHY. Use Value: 3.5 pF typical capacitance prevents signal integrity loss at 480 Mbps; 9.8 V clamping avoids violating transceiver's absolute maximum ratings. | Use Scenario: Safeguarding HDMI DDC (I²C) and CEC control lines in AV receivers exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on 5 V-tolerant I²C bus lines, maintaining rise time < 300 ns per HDMI spec. Use Value: Sub-5 pF capacitance preserves I²C timing margins; ±8 kV contact rating meets HDMI compliance test requirements. |
| Ethernet PHY MDI-X Lines | Automotive Infotainment USB Ports |
Use Scenario: Adding secondary ESD protection on 10/100BASE-TX transformer-coupled MDI-X pairs in industrial gateways. IC Role / Device Role / Timing Role: Secondary TVS after common-mode choke, suppressing fast transients that bypass primary isolation. Use Value: 300 W peak power rating handles residual surges post-transformer; 556 °C/W RJA allows operation without thermal derating in sealed enclosures. | Use Scenario: Protecting rear-seat USB charging ports in vehicles subjected to repeated plug/unplug cycles and cabin ESD. IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional clamp on 5 V VBUS and data lines, mounted adjacent to USB Type-A receptacle. Use Value: −55 °C to +150 °C operating range supports under-dash mounting; UL 94 V-0 rating satisfies automotive interior material safety standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ESD5Z5.0T1G | Same SOT-23 package, 5.0 V VRWM, but 12 pF capacitance (vs. 3.5 pF typ for SZSL05T1G); lower 240 W Ppk rating. | Less suitable for >100 Mbps interfaces due to higher capacitance-induced signal distortion. | Select only if cost sensitivity outweighs speed requirement and layout allows additional filtering. |
| TPD2E001DRYR | 2-channel, 0.65 pF per line, but requires 6-pin X2SON package; 5.5 V VRWM; not AEC-Q101 qualified. | Optimized for space-constrained dual-line protection (e.g., USB D+/D−), but lacks automotive qualification. | Prefer for consumer-grade high-density designs where ultra-low capacitance is mandatory and AEC-Q101 is not required. |
Compared with ESD5Z5.0T1G and TPD2E001DRYR, the SZSL05T1G uniquely balances ultra-low capacitance (3.5 pF), automotive qualification, and robust 300 W surge handling in a single-channel SOT-23-making it optimal for cost-sensitive, high-reliability USB/HDMI protection where board space and qualification matter.
Availability
SZSL05T1G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI control channel safeguarding, and automotive infotainment port hardening requiring stable component supply across production lifecycles.
Supply support for SZSL05T1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SZSL05T1G belongs to onsemi's SL05T1G Series of low-capacitance ESD protection diodes, engineered specifically for high-speed digital interfaces where signal fidelity and transient immunity must coexist.
FAQ
What is the clamping voltage of the SZSL05T1G at 5 A peak pulse current?
The SZSL05T1G has a maximum clamping voltage of 11 V at 5 A peak pulse current (8 × 20 µs waveform), as specified in the Electrical Characteristics table on page 2 of the onsemi datasheet. This value ensures downstream ICs remain within safe operating voltage limits during severe ESD or surge events. The SZSL05T1G maintains this performance across its full operating temperature range of −55 °C to +150 °C.
Is the SZSL05T1G suitable for bidirectional signal lines like USB D+ and D−?
The SZSL05T1G is unidirectional, so it protects only one polarity by default. For bidirectional USB D+ and D− lines, two SZSL05T1G devices must be used in inverse-parallel configuration-one per line-with anode-to-ground and cathode-to-line orientation reversed on one device. This achieves symmetrical ±8 kV ESD protection while retaining sub-5 pF capacitance per path.
Does the SZSL05T1G require a PCB ground plane for effective operation?
Yes-the SZSL05T1G relies on low-inductance grounding to achieve its specified clamping performance. onsemi recommends using solid ground planes and minimizing trace length between the cathode (Pin 2) and ground plane to reduce parasitic inductance. Without proper grounding, clamping voltage can rise significantly during fast transients, risking damage to protected ICs. The SZSL05T1G datasheet explicitly states this requirement in the Applications Background section.
What is the meaning of "SZ" prefix in SZSL05T1G?
The "SZ" prefix in SZSL05T1G indicates automotive-grade qualification: the device is AEC-Q101 certified, PPAP capable, and manufactured under site- and process-control requirements unique to automotive applications. It distinguishes the part from standard SL05T1G variants intended for commercial use. All SZ-prefixed devices undergo additional stress testing and traceability controls required by automotive OEMs.
Can the SZSL05T1G replace older ESD diodes like PGB1010603 in USB 2.0 designs?
The SZSL05T1G can serve as a functional upgrade to PGB1010603 in USB 2.0 applications due to its lower 3.5 pF capacitance (vs. ~12 pF), tighter 9.8 V clamping at 1 A, and AEC-Q101 qualification. However, pinout differs: PGB1010603 uses SOD-323, while SZSL05T1G uses SOT-23. Layout redesign is required. The SZSL05T1G also offers superior IEC 61000-4-2 performance (±8 kV contact vs. ±6 kV for PGB1010603).
SZSL05T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 11V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 3.5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZSL05T1G FAQ
1.How can I place an order for SZSL05T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZSL05T1G 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 SZSL05T1G reliable?
The price and inventory of SZSL05T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZSL05T1G is usually 5 days.
3.What payment methods are accepted for SZSL05T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZSL05T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZSL05T1G?
SZSL05T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZSL05T1G 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 SZSL05T1G?
For technical support, including SZSL05T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZSL05T1G requirements.
6.How does Aetrix verify that SZSL05T1G is sourced from the original manufacturer or authorized distributors?
All SZSL05T1G 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 SZSL05T1G meets industry standards.
7.What is the process for return or replacement of SZSL05T1G?
All SZSL05T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZSL05T1G, 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 SZSL05T1G part is unused and in its original packaging.
Return procedure for SZSL05T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZSL05T1G Tags
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DESD5V0U1BB-7
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D12V0L1B2LP-7B
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PESD2V0Y1BSFYL
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