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onsemi SMF10AT1
- Part No.:
- SMF10AT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-123F
- Datasheet:
-
SMF10AT1.pdf
- Description:
- TVS DIODE 10VWM 17VC SOD123FL
- Quantity:
- Payment:
- Shipping:
Inventory:9,019
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Product details
Overview
SMF10AT1 from onsemi is a unidirectional transient voltage suppressor (TVS) diode in SOD−123FL package, designed for overvoltage protection of sensitive electronics. It features a 10 V working peak reverse voltage (VRWM), 17 V maximum clamping voltage (VC) at 11.8 A peak pulse current (IPP), and 200 W peak pulse power rating at 10/1000 µs waveform - ideal for protecting DC power rails in portable consumer devices.
For engineers reviewing the SMF10AT1 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin above operating voltage, clamping voltage headroom relative to IC absolute maximum ratings, surge current capability under IEC61000−4−4 (40 A), and low-profile SOD−123FL footprint compatibility with space-constrained PCB layouts.
Technical Context
This TVS operates as a Zener-based crowbar device, entering avalanche breakdown when reverse voltage exceeds its 11.1–12.3 V breakdown range (VBR @ IT = 1 mA). Its sub-1 ns response time ensures suppression before downstream ICs experience overstress, while low zener impedance maintains tight clamping under fast transients.
Thermal design relies on junction-to-ambient thermal resistance (RθJA = 325 °C/W) and maximum junction temperature (150 °C), enabling 385 mW steady-state dissipation on FR-4 with recommended pad layout. The cathode-anode polarity is marked by a band, and mounting supports reflow up to 260 °C per MSL 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10 V - must be ≥ circuit's continuous DC or peak AC operating voltage to avoid leakage-induced power loss |
| VBR (min/max) | 11.1 V / 12.3 V - defines reliable turn-on threshold; ensures conduction before damage to protected ICs |
| VC @ IPP | 17 V max at 11.8 A - limits voltage seen by load during 10/1000 µs surge; critical for 12 V system compatibility |
| IPP | 11.8 A - peak current it safely shunts without failure; validated per IEC61000−4−4 40 A test waveform |
| Leakage IR | 2.5 µA max @ 10 V - negligible standby current draw; avoids battery drain in always-on portable systems |
| ESD Rating | Class 3 (>16 kV HBM); IEC61000−4−2 Level 4 - qualifies for direct port-level ESD protection in USB, audio, and button interfaces |
| Package | SOD−123FL - 2.5 × 1.2 mm footprint, 1.0 mm max height; enables high-density placement near connectors or IC power pins |
Pinout & Package
SOD−123FL is a surface-mount, two-terminal, unidirectional TVS package with molded thermosetting plastic case (UL94 VO), matte tin-plated leads, and cathode indicated by a polarity band. Mounting orientation is unrestricted; qualified for 260 °C reflow (MSL 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to protected line (e.g., VBUS, signal line); reverse-biased during normal operation |
| 2 (Non-banded End) | Anode | Connected to ground reference; completes clamping path during transient events |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD−123FL package | 1.0 mm max height enables use in ultra-thin mobile devices and stacked PCB assemblies |
| 200 W peak pulse power (10/1000 µs) | Withstands industrial-grade surges without degradation; exceeds IEC61000−4−4 requirements |
| Clamping ratio VC/VBR ≈ 1.5 | Indicates efficient energy handling with minimal voltage overshoot during fast transients |
| ESD robustness: >16 kV HBM | Eliminates need for additional ESD diodes at board edges or I/O ports |
| Footprint area: 8.45 mm² | Reduces PCB real estate vs. SMA/SMB packages; simplifies layout in tight spaces |
Applications
| USB Power Input Protection | Automotive Infotainment Display Interface |
|---|---|
Use Scenario: Protects 5 V USB VBUS line from hot-plug transients, ESD, and load-dump coupling in portable chargers and peripherals. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND, acting as voltage-clamping element during sub-100 ns events. Use Value: Limits VBUS excursion to ≤17 V during 11.8 A surges, preserving USB controller ICs rated for 20 V absolute max. |
Use Scenario: Shields LVDS or FPD-Link video data lines in automotive displays from ISO 10605 ESD and supply rail coupling noise. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF @ 0 V) placed across differential pairs to clamp common-mode surges without signal integrity loss. Use Value: Sub-1 ns response prevents bit errors during 15 kV contact discharge; SOD−123FL allows placement within 3 mm of connector. |
| Industrial PLC Digital Input Protection | Smartphone Button & Sensor Interface |
Use Scenario: Guards 24 V digital input channels against field-wiring transients, inductive kickback, and lightning-induced surges in factory automation. IC Role / Device Role / Timing Role: Standoff-rated TVS (VRWM = 10 V) used with series resistor to extend effective clamping range to 24 V systems via voltage division. Use Value: Enables robust 24 V input stage with only one external resistor; 200 W rating handles repetitive 10/1000 µs surges per IEC61000−4−5. |
Use Scenario: Protects capacitive touch buttons, ambient light sensors, and proximity detectors from human-body ESD in handheld devices. IC Role / Device Role / Timing Role: Ultra-low-leakage (2.5 µA) TVS placed directly at sensor pads to prevent false triggers and oxide damage. Use Value: Prevents sensor saturation or latch-up during 8 kV air discharge; 1.0 mm height avoids interference with front-bezel mechanical stackup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A | DO-214AC package; 1000 W peak power (8/20 µs); higher VC (16.7 V); larger footprint (4.3 × 2.6 mm) | Better suited for high-energy industrial surges; less suitable for ultra-compact portable designs | Choose SMAJ10A when surge energy exceeds 200 W and PCB space permits larger package |
| P6SMB10A | DO-214AA package; 600 W peak power (10/1000 µs); VC = 17 V; same VRWM but higher leakage (5 µA) | Higher power handling than SMF10AT1 but incompatible with fine-pitch SMT assembly due to larger body | Choose P6SMB10A for cost-sensitive industrial power supplies where 2.5 mm height is acceptable |
Compared with SMAJ10A and P6SMB10A, the SMF10AT1 delivers identical 10 V standoff and 17 V clamping in a footprint 60% smaller than SMAJ10A and 45% smaller than P6SMB10A - making it optimal for space-constrained, battery-powered applications requiring certified ESD and surge immunity.
Availability
SMF10AT1 is available at Aetrix Electronics and suitable for USB power delivery, automotive display interfaces, industrial PLC inputs, and smartphone sensor protection requiring stable component supply across high-mix production runs.
Supply support for SMF10AT1 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 management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The SMF5.0AT1 Series belongs to onsemi's transient voltage suppressor portfolio, engineered specifically for compact, high-reliability overvoltage protection in portable and space-constrained electronic systems.
FAQ
What is the maximum clamping voltage of the SMF10AT1 under surge conditions?
The SMF10AT1 has a maximum clamping voltage (VC) of 17 V when subjected to its rated peak pulse current of 11.8 A (10/1000 µs waveform). This value is guaranteed across temperature and process variation per the official onsemi datasheet, ensuring protected circuits remain below critical voltage thresholds during transient events. The SMF10AT1 achieves this with low dynamic impedance and fast avalanche response.
Can the SMF10AT1 be used in bidirectional protection configurations?
No - the SMF10AT1 is a unidirectional TVS diode, optimized for DC or single-polarity signal line protection. It conducts only in reverse bias above VBR and blocks forward current like a standard diode. For bidirectional protection (e.g., AC lines or differential signals), a dedicated bidirectional part such as SMBJ10CA or paired unidirectional devices would be required. The SMF10AT1 datasheet explicitly specifies unidirectional operation.
What is the thermal resistance and power derating behavior of the SMF10AT1?
The SMF10AT1 has a junction-to-ambient thermal resistance (RθJA) of 325 °C/W when mounted on FR-4 with the recommended minimum pad size. At 25 °C ambient, its steady-state power dissipation is 385 mW; this derates linearly to zero at 150 °C. The SMF10AT1's thermal performance is validated per JEDEC standards and assumes proper copper pour and solder joint quality - critical for reliability in thermally demanding environments.
How does the SMF10AT1 perform under IEC61000−4−2 and IEC61000−4−4 compliance testing?
The SMF10AT1 meets IEC61000−4−2 Level 4 (±8 kV contact / ±15 kV air) and IEC61000−4−4 (40 A, 5/50 ns) requirements as verified in onsemi's characterization reports. Its <1 ns response time and low leakage (<2.5 µA) ensure consistent clamping without false triggering. The SMF10AT1's performance is confirmed across full temperature range (−55 °C to +150 °C), supporting deployment in harsh automotive and industrial settings.
Is the SMF10AT1 compatible with lead-free reflow soldering processes?
Yes - the SMF10AT1 is qualified for lead-free reflow per J-STD-020, with a maximum peak temperature of 260 °C for ≤10 seconds and full MSL 1 classification. Its matte tin (100% Sn) lead finish and void-free epoxy mold compound ensure reliable intermetallic formation and long-term solder joint integrity. The SMF10AT1's thermal profile tolerance supports standard industry reflow ovens without special ramp rates or soak times.
SMF10AT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SOD-123F
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 11.8A
- 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
SMF10AT1 FAQ
1.How can I place an order for SMF10AT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF10AT1 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 SMF10AT1 reliable?
The price and inventory of SMF10AT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF10AT1 is usually 5 days.
3.What payment methods are accepted for SMF10AT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF10AT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF10AT1?
SMF10AT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF10AT1 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 SMF10AT1?
For technical support, including SMF10AT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF10AT1 requirements.
6.How does Aetrix verify that SMF10AT1 is sourced from the original manufacturer or authorized distributors?
All SMF10AT1 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 SMF10AT1 meets industry standards.
7.What is the process for return or replacement of SMF10AT1?
All SMF10AT1 units undergo pre-shipment inspection (PSI). If there is an issue with SMF10AT1, 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 SMF10AT1 part is unused and in its original packaging.
Return procedure for SMF10AT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF10AT1 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
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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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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