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onsemi SMF13AT1
- Part No.:
- SMF13AT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-123F
- Datasheet:
-
SMF13AT1.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SOD123FL
- Quantity:
- Payment:
- Shipping:
Inventory:3,048
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Product details
Overview
SMF13AT1 from onsemi is a unidirectional transient voltage suppressor diode (TVS) designed for overvoltage protection of DC power rails and signal lines. It features a 13 V working peak reverse voltage (VRWM), 21.5 V maximum clamping voltage at 9.3 A peak pulse current, 200 W peak pulse power rating (10/1000 µs), <1 ns response time, and IEC61000-4-2 Level 4 ESD protection. It is used in portable electronics power input stages to safeguard USB ports, battery chargers, and PMIC inputs against ESD and surge events.
For engineers reviewing the SMF13AT1 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin vs. system operating voltage, clamping voltage headroom relative to downstream IC absolute maximum ratings, thermal derating under repeated surge conditions, and SOD−123FL footprint compatibility with high-density PCB layouts.
Technical Context
The SMF13AT1 operates as a Zener-based avalanche clamp, triggered when reverse voltage exceeds its breakdown threshold (14.4–15.9 V at 1 mA). Its low zener impedance ensures stable clamping during fast transients, and its thermally optimized SOD−123FL package enables reliable power dissipation up to 385 mW at 25°C ambient with recommended pad layout.
It meets IEC61000−4−2 (±16 kV contact discharge) and IEC61000−4−4 (40 A, 5/50 ns) immunity standards. The device is rated for −55°C to +150°C operating temperature and qualifies per MSL 1, supporting lead-free reflow up to 260°C for 10 seconds without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 13 V - Maximum continuous reverse voltage before clamping; must exceed system nominal rail (e.g., 12 V supply) with margin. |
| VBR (min/max) | 14.4 V / 15.9 V @ 1 mA - Confirmed breakdown range ensures predictable turn-on without premature conduction. |
| VC @ IPP | 21.5 V @ 9.3 A - Clamping voltage limits stress on protected ICs; stays below typical 24 V logic/PMIC abs max ratings. |
| Peak Pulse Power | 200 W @ 10/1000 µs - Supports common surge test profiles including ISO 7637-2 Pulse 1/2a/5a. |
| Response Time | <1 ns - Fast enough to protect sensitive CMOS inputs before damage occurs during ESD events. |
| ESD Rating | Class 3 HBM (>16 kV), IEC61000−4−2 Level 4 - Validated for end-equipment compliance in handheld and industrial devices. |
| Package | SOD−123FL (Case 498) - 2.5 mm × 1.6 mm footprint, 1.0 mm max height; compatible with automated SMT assembly. |
Pinout & Package
SOD−123FL surface-mount package with cathode indicated by polarity band; 2-terminal configuration optimized for compact board space and thermal performance on FR-4 substrates.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Clamp Output / Surge Return Path | Connected to protected node (e.g., VBUS); conducts surge current to ground when VRWM exceeded. |
| 2 (Anode) | Reference / Ground Reference | Tied to system ground plane; establishes reference for clamping action and defines unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD−123FL package | 1.0 mm max height enables use in ultra-thin portable designs such as smartphones and wearables. |
| High surge capability | 200 W peak power (10/1000 µs) supports repeated surge events without parameter shift or failure. |
| Fast response <1 ns | Prevents voltage overshoot beyond downstream IC absolute maximum ratings during nanosecond-scale ESD strikes. |
| Low leakage current | <1 µA @ 13 V VRWM minimizes standby power loss in battery-powered applications. |
| IEC61000−4−4 compliant | Withstands 40 A repetitive surge (5/50 ns) - suitable for industrial control I/O protection without external filtering. |
Applications
| USB Power Input Protection | Automotive Body Control Module (BCM) Sensors |
|---|---|
|
Use Scenario: Protecting 5 V/12 V USB-C power delivery inputs from ESD and load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp surges before they reach USB controller or PD controller. Use Value: Limits clamped voltage to 21.5 V, ensuring safe operation of 24 V-tolerant USB PD PHYs while maintaining low leakage for energy efficiency. |
Use Scenario: Safeguarding LIN bus sensor inputs (e.g., temperature, door position) in automotive BCMs exposed to battery transients. IC Role / Device Role / Timing Role: Reverse-biased TVS on LIN data line to absorb coupled spikes from ignition noise or alternator load dump. Use Value: 200 W surge rating and 13 V VRWM match typical LIN bus operating range (8–18 V), preventing false triggers and latch-up. |
| Industrial PLC Digital Input Protection | Portable Medical Device Battery Charging Circuit |
|
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers from field wiring surges and inductive kickback. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt transient energy before it reaches optocoupler or MCU GPIO. Use Value: 21.5 V clamping ensures optocoupler input remains within safe reverse voltage limit (<25 V), preserving isolation integrity. |
Use Scenario: Shielding lithium-ion battery charger IC inputs from ESD during handling and connector mating in portable diagnostic tools. IC Role / Device Role / Timing Role: Clamp on charger IC's PROG or VDD pin to prevent ESD-induced latch-up or gate oxide damage. Use Value: Class 3 HBM (>16 kV) and <1 ns response eliminate need for additional RC filters, reducing BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A | Same VRWM (13 V), but SMA package (larger footprint, higher Ppk = 400 W), RθJA = 110°C/W vs. 325°C/W. | Better suited for high-energy surges where board space allows larger package; less optimal for ultra-thin portable designs. | Select SMAJ13A only if system-level surge testing requires >200 W clamping capacity and thermal mass permits larger footprint. |
| 1.5SMC13A | Higher Ppk (1500 W), DO-214AB package, VRWM = 13 V, VC = 21.5 V - identical clamping but significantly larger and higher leakage (~5 µA). | Used in industrial power supplies where PCB area is not constrained and higher surge margin is required. | Choose 1.5SMC13A when protecting AC/DC front-ends or motor drive inputs requiring multi-kA surge handling, not portable DC rails. |
Compared with SMAJ13A and 1.5SMC13A, the SMF13AT1 delivers equivalent 13 V clamping performance in a 60% smaller footprint and lower leakage, making it optimal for space-constrained, battery-sensitive applications - though its 200 W rating requires careful system-level surge coordination.
Availability
SMF13AT1 is available at Aetrix Electronics and suitable for USB power delivery interfaces, automotive sensor nodes, industrial PLC inputs, and portable medical device charging circuits requiring stable component supply across long production lifecycles.
Supply support for SMF13AT1 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 consumer markets.
The SMF series belongs to onsemi's transient voltage suppressor portfolio, engineered specifically for compact, high-reliability overvoltage protection in space- and power-constrained electronic systems.
FAQ
What is the working peak reverse voltage (VRWM) of the SMF13AT1?
The SMF13AT1 has a VRWM of 13 V, meaning it remains non-conductive up to this reverse voltage level under normal operation. This value is selected to exceed typical 12 V system rails while providing sufficient margin to avoid leakage-related power loss or false triggering during voltage ripple.
Does the SMF13AT1 meet IEC61000−4−2 and IEC61000−4−4 standards?
Yes, the SMF13AT1 is rated for Class 3 HBM ESD (>16 kV) per IEC61000−4−2 Level 4 and withstands 40 A surge current per IEC61000−4−4 (5/50 ns waveform). These certifications are confirmed in the official onsemi datasheet revision 0 (March 2003) and apply directly to the SMF13AT1 device marking LG.
What is the maximum clamping voltage of the SMF13AT1 at its rated peak pulse current?
The SMF13AT1 exhibits a maximum clamping voltage (VC) of 21.5 V at its peak pulse current (IPP) of 9.3 A, measured using the 10/1000 µs standard surge waveform. This value ensures protected components see no more than 21.5 V during worst-case transient events.
Can the SMF13AT1 be used in bidirectional protection configurations?
No - the SMF13AT1 is a unidirectional TVS diode, designed only for reverse-biased clamping. Its internal Zener structure does not support forward conduction for positive transients; for bidirectional protection, two SMF13AT1 devices in series opposition or a dedicated bidirectional part like SMBJ13CA would be required.
What is the thermal resistance and power dissipation capability of the SMF13AT1 in standard mounting?
The SMF13AT1 in SOD−123FL package 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, this yields a steady-state power dissipation limit of 385 mW - sufficient for leakage management but not for sustained surge duty cycles without derating.
SMF13AT1 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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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
SMF13AT1 FAQ
1.How can I place an order for SMF13AT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF13AT1 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 SMF13AT1 reliable?
The price and inventory of SMF13AT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF13AT1 is usually 5 days.
3.What payment methods are accepted for SMF13AT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF13AT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF13AT1?
SMF13AT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF13AT1 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 SMF13AT1?
For technical support, including SMF13AT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF13AT1 requirements.
6.How does Aetrix verify that SMF13AT1 is sourced from the original manufacturer or authorized distributors?
All SMF13AT1 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 SMF13AT1 meets industry standards.
7.What is the process for return or replacement of SMF13AT1?
All SMF13AT1 units undergo pre-shipment inspection (PSI). If there is an issue with SMF13AT1, 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 SMF13AT1 part is unused and in its original packaging.
Return procedure for SMF13AT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF13AT1 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
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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