SMF250A
TVS DiodeThe SMF250A is a tvs diode from Littelfuse. View the full SMF250A datasheet below including key specifications, absolute maximum ratings.
SMF250A shares its datasheet with SMF20A, whose page lists every part number it covers.
Official SMF250A datasheet (PDF) — the source this page was extracted from.
SMF250A Key Specifications
| Parameter | Value |
|---|---|
| Applications | General Purpose |
| Breakdown Voltage | 23.35 V |
| Clamping Voltage | 32.4 V |
| Composition | Zener |
| Current - Peak Pulse (10/1000µs) | 6.2A |
| Introduction Date | 2012-03-01 |
| Lead Free | Lead Free |
| Leakage Current | 1 µA |
| Lifecycle Status | Production (Last Updated: 4 months ago) |
| Max Breakdown Voltage | 24.5 V |
| Max Operating Temperature | 150 °C |
| Max Power Dissipation | 1 W |
| Max Reverse Leakage Current | 1 µA |
| Max Surge Current | 6.2 A |
| Min Breakdown Voltage | 22.2 V |
| Min Operating Temperature | -65 °C |
| Mount | Surface Mount |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Number of Elements | 1 |
| Number of Pins | 2 |
| Number of Terminals | 2 |
| Number of Unidirectional Channels | 1 |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| Package / Case | SOD-123F |
| Packaging | Cut Tape |
| Packaging | Cut Tape |
| Peak Pulse Current | 6.2 A |
| Peak Pulse Power | 1 kW |
| Peak Reverse Current | 1 µA |
| Polarity | Unidirectional |
| Power - Peak Pulse | 200W |
| Power Line Protection | No |
| Power Line Protection | No |
| REACH SVHC | No |
| Reverse Breakdown Voltage | 22.2 V |
| Reverse Standoff Voltage | 20 V |
| Reverse Voltage | 20 V |
| RoHS | Compliant |
| Schedule B | 8541100080, 8541100080|8541100080|8541100080|8541100080|8541100080 |
| Standard Pack Qty | 10000 |
| Supplier Device Package | SOD-123FL |
| Termination | SMD/SMT |
| Test Current | 1 mA |
| Type | Zener |
| Unidirectional Channels | 1 |
| Voltage - Breakdown (Min) | 22.2V |
| Voltage - Clamping (Max) @ Ipp | 32.4V |
| Voltage - Reverse Standoff (Typ) | 20V |
SMF250A Overview
Part: SMF20A Type: TVS Diode
Description: The SMF series is designed to protect sensitive electronic equipment from voltage transients, offering 200W peak pulse power capability at 10/1000μs waveform in a low-profile SOD-123FL package.
Operating Conditions:
- Operating temperature: -65 to 150 °C
Absolute Maximum Ratings:
- Peak Pulse Power Dissipation (8/20μs): 1000 W
- Peak Pulse Power Dissipation (10/1000μs): 200 W
- Power Dissipation On Infinite Heat Sink: 1 W
- Max storage temperature: -65 to 175 °C
Key Specs:
- Breakdown Voltage VBR (min): 22.20 V (at IT=1 mA)
- Breakdown Voltage VBR (max): 24.50 V (at IT=1 mA)
- Reverse Standoff Voltage VR: 20 V
- Reverse Leakage Current IR: 1.0 μA (at VR=20V)
- Peak Pulse Current Ipp: 6.2 A (10/1000μs)
- Clamping Voltage VC: 32.4 V (at Ipp=6.2A, 10/1000μs)
- Fast response time: typically less than 1.0ns from 0 Volts to VBR min
Features:
- 200W peak pulse power capability at 10/1000μs waveform
- Compatible with industrial standard package SOD-123FL
- Low profile: maximum height of 1.1mm
- Low inductance, excellent clamping capability
- For surface mounted applications to optimize board space
- High temperature to reflow soldering guaranteed: 260°C/430sec
- IEC-61000-4-2 ESD 30kV(Air), 30kV (Contact)
- ESD protection of data lines in accordance with IEC 61000-4-2
- EFT protection of data lines in accordance with IEC 61000-4-4
- Glass passivated junction
- Built-in strain relief
- Plastic package is flammability rated V-0 per UL 94
- Meet MSL level1, per J-STD-020, LF maximun peak of 260°C
- Matte tin lead-free plated
- Halogen-free and RoHS compliant
- UL Recognized to UL 497B as an Isolated Loop Circuit Protector
Applications:
- I/O interfaces
- VCC bus
- Cellular phones
- Portable devices
- Business machines
- Power supplies
- Other consumer applications
Package:
- SOD-123FL (2.90-3.10 mm length, 3.40-3.90 mm width, 0.90-1.08 mm height for SMF110A
SMF250A / SMF5.0CASMF85CA)
SMF250A Features
- 200W peak pulsepower capability at 10/1000μs waveform, repetition rate (duty cycle): 0.01%
- ·Compatible with industrial standard package SOD-123FL
- Low profile: maximum height of 1.1mm.
- Low inductance, excellent clamping capability
- For surface mounted applications to optimize board space
- High temperature to reflow soldering guaranteed: 260°C/430sec
- T ypical failure mode is short from over-specified voltage or current
- Whisker test is conducted based on JEDEC JESD201A per its table 4a and 4c
- IEC-61000-4-2 ESD 30kV(Air), 30kV (Contact)
- ESD protection of data lines in accordance with IEC 61000-4-2
SMF250A Applications
SMF devices are ideal for the protection of I/O interfaces, V CC bus and other vulnerable circuit used in cellular phones, portable devices, business machines, power supplies and other consumer applications.
- EFT protection of data lines in accordance with IEC 61000-4-4
- Fast response time: typically less than 1 .0ns from 0 Volts to V BR min
- Glass passivated junction
- Built-in strain relief
- Plastic package is flammability rated V-0 per UL 94
- Meet MSL level1, per J-STD-020, LF maximun peak of 260°C
- Matte tin lead-free plated
- Halogen-free and RoHS compliant
- Pb-free E3 means 2nd level interconnect is Pb-free and the terminal finish material is tin(Sn) (IPC/ JEDEC J-STD609A.01)
- UL Recognized to UL 497B as an Isolated Loop Circuit Protector.
SMF250A Absolute Maximum Ratings
| Parameter | Parameter | Symbol | Value | Unit |
|---|---|---|---|---|
| Peak Pulse Power Dissipation atT A =25°C (Note 1) | 8/20μs | P PPM | 1000 | W |
| Peak Pulse Power Dissipation atT A =25°C (Note 1) | 10/1000μs (Note 2) | P PPM | 200 | W |
| Power Dissipation On Infinite Heat Sink at TL=50°C | Power Dissipation On Infinite Heat Sink at TL=50°C | P D | 1 | W |
| Thermal Resistance Junction- to- Ambient | Thermal Resistance Junction- to- Ambient | R Ɵ JA | 220 | °C/W |
| Thermal Resistance Junction- to- Lead | Thermal Resistance Junction- to- Lead | R Ɵ JL | 100 | °C/W |
| OperatingTemperature Range | OperatingTemperature Range | T J | -65 to 150 | °C |
| StorageTemperature Range | StorageTemperature Range | T STG | -65 to 175 | °C |
SMF250A Thermal Information
| Parameter | Parameter | Symbol | Value | Unit |
|---|---|---|---|---|
| Peak Pulse Power Dissipation atT A =25°C (Note 1) | 8/20μs | P PPM | 1000 | W |
| Peak Pulse Power Dissipation atT A =25°C (Note 1) | 10/1000μs (Note 2) | P PPM | 200 | W |
| Power Dissipation On Infinite Heat Sink at TL=50°C | Power Dissipation On Infinite Heat Sink at TL=50°C | P D | 1 | W |
| Thermal Resistance Junction- to- Ambient | Thermal Resistance Junction- to- Ambient | R Ɵ JA | 220 | °C/W |
| Thermal Resistance Junction- to- Lead | Thermal Resistance Junction- to- Lead | R Ɵ JL | 100 | °C/W |
| OperatingTemperature Range | OperatingTemperature Range | T J | -65 to 150 | °C |
| StorageTemperature Range | StorageTemperature Range | T STG | -65 to 175 | °C |
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
Other Diodes
- CDSOT23-SM712 – Bourns Inc., Surface Mount TVS Diode
- VMNN110CMS-TR – Stanley Electric, Infrared Emitting Diode
- SS34HE – Vishay Intertechnology, Schottky Barrier Rectifier
- BSD3A311V – Brightking, ESD Protection Diode
- CH213K – WCH, Low Dropout Ideal Diode Chip
- ESD5Z2.5T1G – onsemi, ESD Protection TVS Diode
- PMEG4010CEJ – Nexperia, Schottky Barrier Rectifier
- USBLC6-2SC6 – STMicroelectronics, ESD Protection Device
Ask your AI agent about the SMF250A
Connect SheetsData to Claude, Cursor, Codex or any MCP client and your agent reads this datasheet for you: pinout, limits, register maps and design checks, with the numbers taken from the PDF.
claude mcp add --transport http sheetsdata https://mcp.sheetsdata.com/mcp
Then ask: "Can the SMF250A run from my 12 V rail? Check it against the datasheet limits."
Create a free account $2 of usage every month, no card needed.