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onsemi SMF7.5AT1G
- Part No.:
- SMF7.5AT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-123F
- Datasheet:
-
SMF7.5AT1G.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC SOD123FL
- Quantity:
- Payment:
- Shipping:
Inventory:135,500
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Product details
Overview
SMF7.5AT1G from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 7.5 V working peak reverse voltage (VRWM), 12.9 V maximum clamping voltage at 15.5 A peak pulse current, 200 W peak pulse power rating (10/1000 µs), <1 ns response time, and AEC-Q101 qualification for automotive use. It is commonly deployed in USB ports, DC-DC converter inputs, and industrial sensor interfaces.
For engineers reviewing the SMF7.5AT1G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM alignment with operating voltage, clamping voltage margin relative to protected IC's absolute maximum rating, surge current capability under IEC 61000-4-2/4-4, and SOD-123FL package compatibility with high-density PCB layouts.
Technical Context
The SMF7.5AT1G operates as a Zener-based unidirectional TVS, conducting only during reverse overvoltage events above its breakdown threshold (8.33–9.21 V at 1 mA). Its low dynamic impedance ensures stable clamping under fast transients such as ESD (16 kV HBM, 8 kV IEC 61000-4-2 contact), EFT (40 A per IEC 61000-4-4), and lightning-induced surges.
Thermal design relies on its 26 °C/W junction-to-cathode thermal resistance and MSL 1 reflow rating (260 °C peak). The device is mounted in any orientation, uses 100% matte tin lead finish, and meets UL 94 V-0 flammability requirements in its void-free thermoset epoxy package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 7.5 V - Minimum DC or continuous peak operating voltage the device can withstand without conduction. |
| VBR (min/max) | 8.33 V / 9.21 V @ 1 mA - Ensures reliable turn-on before protected circuit exceeds safe voltage limits. |
| VC (max) | 12.9 V @ IPP = 15.5 A - Clamping voltage defines worst-case stress on downstream components during surge. |
| IPP | 15.5 A - Peak pulse current capacity under 10/1000 µs waveform; determines survivability of common surge threats. |
| Response time | <1 ns - Enables suppression of sub-nanosecond ESD events before damage occurs to sensitive ICs. |
| ESD rating | 16 kV HBM, 8 kV IEC 61000-4-2 contact - Validates robustness against human-handling and system-level electrostatic discharge. |
| Package | SOD-123FL - Surface-mount footprint (2.7 × 1.6 mm, 1.0 mm max height) optimized for space-constrained portable electronics. |
Pinout & Package
SOD-123FL is a two-terminal surface-mount plastic package with cathode indicated by a polarity band. Mounting position is unrestricted; qualified for 260 °C reflow and meets MSL 1 moisture sensitivity level.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VRWM. |
| 2 (Anode) | Reference node | Typically tied to system ground or lowest potential reference point in unidirectional configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD-123FL package | 1.0 mm max height enables use in ultra-thin consumer devices and stacked PCB assemblies. |
| 200 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3 surge immunity (1 kV line-to-ground) in compact form factor. |
| Class 3 ESD immunity (16 kV HBM) | Eliminates need for additional ESD protection stages in handheld product front-end interfaces. |
| AEC-Q101 qualified (SZ variant available) | Validated for automotive powertrain and body electronics where reliability under thermal cycling is critical. |
| Pb-free and RoHS compliant | Meets global environmental compliance mandates without performance trade-offs or solderability degradation. |
Applications
| USB 2.0 Data Line Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
Use Scenario: Protecting D+ and D− lines in USB 2.0 host/device ports from ESD and cable discharge events. IC Role / Device Role: Unidirectional TVS placed between data line and chassis ground to clamp transients while preserving signal integrity. Use Value: 12.9 V clamping voltage stays well below USB transceiver's 20 V abs max rating, ensuring no latch-up or permanent damage during 8 kV contact ESD. | Use Scenario: Safeguarding microcontroller GPIOs connected to door lock switches, mirror controls, and lighting sensors in 12 V vehicle systems. IC Role / Device Role: Standoff-rated TVS absorbing load dump spikes and ISO 7637-2 pulse 1/2a transients on low-voltage control lines. Use Value: 7.5 V VRWM matches typical 5 V logic supply; AEC-Q101 qualification guarantees operation across −40 °C to +125 °C ambient. |
| Industrial Sensor Signal Conditioning | DC-DC Converter Input Rail |
Use Scenario: Shielding analog front-end circuits (e.g., RTD, thermocouple amplifiers) from EFT bursts in factory automation equipment. IC Role / Device Role: Low-capacitance TVS on sensor output lines to prevent false triggering or ADC saturation during 40 A EFT events. Use Value: Sub-1 ns response prevents transient propagation into precision op-amps; SOD-123FL footprint avoids layout congestion near sensitive nodes. | Use Scenario: Suppressing switching noise and input surges on the VIN pin of buck converters powering FPGA or MCU cores. IC Role / Device Role: Primary overvoltage clamp placed upstream of input capacitor to limit transient energy entering regulator IC. Use Value: 200 W peak power rating handles repetitive 10/1000 µs surges from relay coil flyback or hot-swap events without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A | Higher clamping voltage (12.0 V vs. 12.9 V), larger SMA package (4.5 × 2.7 mm), 400 W peak power rating. | Better suited for higher-energy surges but requires more PCB area; not suitable for ultra-thin designs. | Select SMAJ7.5A only if surge current exceeds 15.5 A or board space permits larger footprint. |
| P6SMB7.5A | Same VRWM and clamping, but DO-214AA package (4.5 × 3.3 mm), 600 W peak power, higher leakage (5 µA vs. 50 µA). | Used in legacy industrial power supplies where mechanical robustness outweighs size constraints. | Choose P6SMB7.5A when higher surge endurance is required and SOD-123FL's 1.0 mm height is not mandatory. |
Compared with SMAJ7.5A and P6SMB7.5A, the SMF7.5AT1G delivers identical voltage protection thresholds in a 65% smaller footprint-critical for modern portable and automotive ECUs-while maintaining full IEC 61000-4-2/4-4 compliance and AEC-Q101 readiness.
Availability
SMF7.5AT1G is available at Aetrix Electronics and suitable for USB interface protection, automotive body electronics, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMF7.5AT1G 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The SMF7.5AT1G belongs to the SMF Series of unidirectional TVS diodes engineered for high-reliability overvoltage protection in space-constrained, high-surge environments-including automotive infotainment, ADAS sensors, and portable medical devices.
FAQ
What is the working peak reverse voltage (VRWM) of the SMF7.5AT1G?
The SMF7.5AT1G has a working peak reverse voltage (VRWM) of 7.5 V. This value represents the maximum continuous DC or peak operating voltage the device can block without entering avalanche conduction. It is selected to match nominal 5 V or 3.3 V system rails while providing sufficient margin above steady-state voltage to avoid leakage-related power loss or false triggering during normal operation.
Does the SMF7.5AT1G meet automotive qualification standards?
Yes, the SMF7.5AT1G is part of the AEC-Q101 qualified SMF series. While the base SMF7.5AT1G is industrial-grade, its SZ-prefix variant (SZSMF7.5AT1G) is fully AEC-Q101 certified and PPAP capable. Both share identical electrical specs and SOD-123FL packaging, enabling drop-in qualification upgrades for automotive body electronics and infotainment systems requiring extended temperature range (−55 °C to +150 °C) and enhanced reliability validation.
What is the maximum clamping voltage of the SMF7.5AT1G under surge conditions?
The SMF7.5AT1G has a maximum clamping voltage (VC) of 12.9 V at a peak pulse current (IPP) of 15.5 A, tested with the standard 10/1000 µs waveform. This clamping voltage defines the upper voltage limit imposed on protected circuitry during transient events and must be verified against the absolute maximum ratings of downstream ICs-such as USB transceivers or microcontroller I/O pins-to ensure safe operation.
Can the SMF7.5AT1G replace older SMAJ or P6SMB series TVS diodes?
The SMF7.5AT1G provides functional equivalence to SMAJ7.5A and P6SMB7.5A in terms of VRWM and basic protection function, but it is not a direct pin-compatible replacement due to its SOD-123FL package versus SMA or DO-214AA footprints. Layout redesign is required. However, its lower profile (1.0 mm vs. ≥2.2 mm) and smaller footprint make it ideal for next-generation compact designs where board space and height are constrained.
What ESD and surge immunity standards does the SMF7.5AT1G comply with?
The SMF7.5AT1G complies with IEC 61000-4-2 (ESD): ±8 kV contact discharge and ±15 kV air discharge; IEC 61000-4-4 (EFT): 40 A (5/50 ns pulses); and IEC 61000-4-5 (surge): 200 W peak power (10/1000 µs). These ratings are validated per the ON Semiconductor datasheet Rev. 7 and confirm suitability for end-equipment compliance testing in consumer, industrial, and automotive applications.
SMF7.5AT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SOD-123F
- Series:
- SMF
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 15.5A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123FL
SMF7.5AT1G FAQ
1.How can I place an order for SMF7.5AT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF7.5AT1G 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 SMF7.5AT1G reliable?
The price and inventory of SMF7.5AT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF7.5AT1G is usually 5 days.
3.What payment methods are accepted for SMF7.5AT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF7.5AT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF7.5AT1G?
SMF7.5AT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF7.5AT1G 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 SMF7.5AT1G?
For technical support, including SMF7.5AT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF7.5AT1G requirements.
6.How does Aetrix verify that SMF7.5AT1G is sourced from the original manufacturer or authorized distributors?
All SMF7.5AT1G 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 SMF7.5AT1G meets industry standards.
7.What is the process for return or replacement of SMF7.5AT1G?
All SMF7.5AT1G units undergo pre-shipment inspection (PSI). If there is an issue with SMF7.5AT1G, 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 SMF7.5AT1G part is unused and in its original packaging.
Return procedure for SMF7.5AT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF7.5AT1G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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