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onsemi SZSM05T1G
- Part No.:
- SZSM05T1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZSM05T1G.pdf
- Description:
- TVS DIODE 5VWM 9.8VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,799
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Product details
Overview
SZSM05T1G from onsemi is a dual common-anode ESD protection diode array in SOT-23 package, designed for transient overvoltage and electrostatic discharge protection of two signal lines. It features 5.0 V working peak reverse voltage, 300 W peak pulse power (8/20 µs), ≤1.0 µA reverse leakage at VRWM, 9.8 V clamping voltage at 1 A IPP, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SZSM05T1G datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional/unidirectional configuration flexibility, low clamping voltage under surge, board-space-efficient dual-line protection, and UL 94 V-0 flammability rating for safety-critical PCB layouts.
Technical Context
The SZSM05T1G integrates two monolithic silicon avalanche diodes sharing a common anode (Pin 3), enabling independent unidirectional protection of two I/O lines (Pins 1 and 2 to Pin 3). Its junction design meets IEC 61000-4-2 ±15 kV air / ±26 kV contact ESD immunity and IEC 61000-4-5 12 A lightning surge capability.
Thermal performance is specified for both FR-5 board (RJA = 556 °C/W) and alumina substrate (RJA = 417 °C/W), with maximum junction temperature rated from −55 °C to +150 °C. The device operates with typical capacitance of 225 pF at 0 V bias, supporting high-speed data line protection without excessive signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage | 5.0 V - Sets maximum continuous DC or AC signal swing before conduction begins. |
| Clamping Voltage @ 1 A IPP | 9.8 V - Limits transient voltage seen by protected IC during 8/20 µs surge, safeguarding downstream logic. |
| Peak Pulse Power | 300 W - Sustains single 8/20 µs transients up to 17 A without failure per IEC 61000-4-5 Level 2. |
| ESD Withstand (IEC 61000-4-2) | ±26 kV contact - Meets automotive and industrial interface port immunity requirements without external circuitry. |
| Reverse Leakage @ VRWM | ≤1.0 µA - Minimizes standby current draw and avoids signal integrity degradation in high-impedance nodes. |
| Capacitance @ 0 V | 225 pF - Compatible with USB 2.0, RS-232, and other sub-480 Mbps interfaces where loading must be controlled. |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics applications including infotainment, body control, and ADAS sensor interfaces. |
Pinout & Package
SOT-23 (TO-236) package, case 318, style 12: 2.90 mm × 1.30 mm × 1.00 mm, void-free thermosetting plastic, Pb-free, UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Line 1) | Protected I/O path #1; connects to signal line requiring ESD clamping to common anode. |
| Pin 2 | Cathode (Line 2) | Protected I/O path #2; enables dual-line protection with shared ground/anode return. |
| Pin 3 | Anode (Common) | Shared return node; typically tied to system ground or local reference plane for low-inductance surge path. |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Enables compact protection of two independent signal lines using one SOT-23 footprint-reducing BOM count and PCB area by 50% vs. discrete diodes. |
| Configurable unidirectional operation | Each cathode-to-anode path functions as a standalone TVS; supports asymmetric signal rails or mixed-voltage interface protection. |
| Low clamping voltage (9.8 V @ 1 A) | Ensures protected ICs (e.g., microcontrollers with 5 V I/O tolerance) remain within safe operating voltage during fast transients. |
| Pb-free and RoHS-compliant | Meets global environmental compliance mandates without derating or reliability trade-offs; compatible with standard reflow profiles (260 °C/10 s). |
| UL 94 V-0 flammability rating | Confirms encapsulant resistance to flame propagation under fault conditions-critical for medical and automotive end equipment certification. |
Applications
| USB 2.0 Port Protection | Automotive Infotainment I/O |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 host or peripheral port against ESD events during cable insertion or handling. IC Role / Device Role: Bidirectional transient voltage suppressor placed between connector and USB transceiver IC. Use Value: 225 pF capacitance avoids signal rise-time degradation; 9.8 V clamping prevents latch-up in USB PHY while meeting IEC 61000-4-2 Level 4. |
Use Scenario: Shielding CAN/LIN bus interface pins or display control lines in head unit or digital cluster against board-level ESD and load dump coupling. IC Role / Device Role: Unidirectional ESD clamp on each signal line referenced to chassis ground via common anode. Use Value: AEC-Q101 qualification ensures reliability across −40 °C to +125 °C ambient; dual-line integration simplifies layout in space-constrained dash modules. |
| Industrial HMI Keypad Interface | Medical Sensor Signal Conditioning |
|
Use Scenario: Safeguarding matrix keypad scan lines (row/column) in factory HMIs exposed to operator touch-induced ESD in dusty, grounded environments. IC Role / Device Role: Common-anode dual TVS connecting each scan line to local ground plane. Use Value: 300 W peak power handles repetitive ESD strikes; low leakage (<1 µA) prevents false key detection in high-impedance pull-up networks. |
Use Scenario: Protecting analog front-end inputs (e.g., ECG electrode leads, temperature sensor outputs) from handling ESD before signal conditioning amplifiers. IC Role / Device Role: Low-capacitance transient suppressor placed at connector entry point, before precision op-amp stages. Use Value: 225 pF capacitance minimizes gain error and phase shift in DC-coupled biosignal paths; UL 94 V-0 supports IEC 60601-1 enclosure compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM05T1G | Same electrical specs and SOT-23 package, but lacks AEC-Q101 qualification and SZ-prefix automotive traceability controls. | Approved for commercial/industrial use only; not suitable for automotive production programs requiring PPAP documentation. | Select when cost sensitivity outweighs automotive qualification needs and full lifecycle traceability is not required. |
| TPD2E001DRYR | Lower capacitance (12 pF), lower clamping (8.5 V @ 1 A), but rated only for 120 W peak power and non-automotive grade. | Better for high-speed USB 3.0 or HDMI; insufficient for IEC 61000-4-5 lightning surge or automotive ESD robustness requirements. | Prefer for ultra-high-speed interfaces where <15 pF loading is mandatory; avoid where 300 W surge margin or AEC-Q101 is mandated. |
Compared with SM05T1G and TPD2E001DRYR, the SZSM05T1G uniquely combines automotive qualification, 300 W surge capability, and dual-line SOT-23 integration-making it the only option among the three qualified for safety-critical automotive ECU I/O protection without layout or BOM changes.
Availability
SZSM05T1G is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial HMI panels, and medical sensor interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SZSM05T1G 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, high-performance silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The SZSM05T1G belongs to onsemi's SM05T1G Series of ESD protection diodes, engineered specifically for space-constrained, high-reliability interfaces requiring certified surge immunity and automotive-grade process control.
FAQ
What is the primary function of the SZSM05T1G in circuit protection?
The SZSM05T1G serves as a dual-line transient voltage suppression diode array, providing ESD and surge protection for two independent signal paths. Its common-anode configuration allows both cathodes (Pins 1 and 2) to clamp to a shared reference (Pin 3), making SZSM05T1G ideal for protecting differential pairs or parallel I/O lines without requiring separate ground returns.
Can the SZSM05T1G be used in bidirectional signal lines like USB D+ and D−?
Yes - although internally unidirectional (cathode-to-anode), the SZSM05T1G can protect bidirectional data lines by connecting Pin 3 (anode) to ground and routing each signal through its respective cathode (Pins 1 and 2). This configuration provides symmetrical clamping during positive and negative transients, and SZSM05T1G's 225 pF capacitance ensures compatibility with USB 2.0 signaling integrity.
How does the SZSM05T1G differ from the standard SM05T1G?
The SZSM05T1G includes the "SZ" prefix denoting automotive-grade manufacturing controls, AEC-Q101 qualification, PPAP capability, and enhanced traceability for site-specific change management. While SM05T1G shares identical electrical specs and packaging, SZSM05T1G undergoes additional stress testing and process validation - meaning SZSM05T1G is approved for automotive production, whereas SM05T1G is limited to commercial/industrial use.
What is the maximum allowable soldering temperature for the SZSM05T1G?
The SZSM05T1G is rated for a maximum lead solder temperature of 260 °C for 10 seconds, consistent with standard Pb-free reflow profiles. This specification is validated for its void-free, corrosion-resistant SOT-23 thermosetting plastic package, and adhering to this limit ensures mechanical integrity and wire-bond reliability - critical for long-term field operation of SZSM05T1G in automotive and medical applications.
Does the SZSM05T1G require external components to function as an ESD protector?
No - the SZSM05T1G operates as a standalone ESD protection device with no external components required. Its integrated dual-diode structure provides complete clamping functionality when Pin 3 is connected to a low-inductance ground reference. Layout best practices (short traces, direct ground stitching) maximize performance, but SZSM05T1G itself needs no series resistors, capacitors, or auxiliary ICs to meet IEC 61000-4-2 ±26 kV contact discharge requirements.
SZSM05T1G 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:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.2V
- Voltage - Clamping (Max) @ Ipp:
- 9.8V
- Current - Peak Pulse (10/1000µs):
- 17A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZSM05T1G FAQ
1.How can I place an order for SZSM05T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZSM05T1G 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 SZSM05T1G reliable?
The price and inventory of SZSM05T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZSM05T1G is usually 5 days.
3.What payment methods are accepted for SZSM05T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZSM05T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZSM05T1G?
SZSM05T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZSM05T1G 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 SZSM05T1G?
For technical support, including SZSM05T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZSM05T1G requirements.
6.How does Aetrix verify that SZSM05T1G is sourced from the original manufacturer or authorized distributors?
All SZSM05T1G 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 SZSM05T1G meets industry standards.
7.What is the process for return or replacement of SZSM05T1G?
All SZSM05T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZSM05T1G, 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 SZSM05T1G part is unused and in its original packaging.
Return procedure for SZSM05T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZSM05T1G Tags
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D12V0L1B2LP-7B
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PESD2V0Y1BSFYL
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