---
title: MCC's 400W TVS Diode Delivers Robust ESD and Transient Surge Protection in a Compact SOD-123FL Package
description: MCC SM4F3.3A 400W TVS diode provides ±30kV ESD protection, low 8V clamping, 3.3V stand-off voltage, and compact SOD-123FL packaging for industrial, IoT, and electronic circuit protection.
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---
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# MCC's 400W TVS Diode Delivers Robust ESD and Transient Surge Protection in a Compact SOD-123FL Package
# MCC's 400W TVS Diode Delivers Robust ESD and Transient Surge Protection in a Compact SOD-123FL Package
.png?width=50&height=50&name=mcc%20150x150%20(1).png)
by [MCC](https://solutions.mccsemi.com/news/author/mcc)
September 08, 2026
## SM4F3.3A 3.3V TVS Diode Featuring ±30kV ESD Protection, Low 8V Clamping Voltage, and 400W Peak Pulse Power for Compact Electronic Designs
MCC's SM4F3.3A TVS diode provides a compact protection solution for 3.3V power rails, digital I/O, and other low-voltage circuits where board space and protection performance are critical.
The SM4F3.3A combines 400W peak pulse power dissipation, ±30kV IEC 61000-4-2 ESD protection, and a low 8V clamping voltage in a compact SOD-123FL package. With low leakage current and unidirectional operation, the device helps protect sensitive electronics against damaging ESD events and transient voltage spikes while supporting space-constrained designs.
400W TVS Diode
##### Features & Benefits:
- **400W IPPM:** Handles high-energy transient pulses with 400W peak pulse power dissipation under the 10/1000µs waveform.
- **±30kV ESD Protection:** IEC 61000-4-2 rated protection against high-level contact and air discharge events.
- **Low 8V VC:** Limits transient overvoltage to reduce electrical stress on downstream components.
- **3.3V VRWM:** Designed for protection of 3.3V power rails and low-voltage electronic circuits.
- **Low Leakage Current:** Maximum leakage current of 150µA helps minimize standby power loss during normal operation.
- **Unidirectional Protection:** Provides effective transient suppression for power inputs and other unidirectional circuits.
[SM4F3.3A](https://www.mccsemi.com/products/protection-devices/tvs/sm4f3.3a)
## Product Highlights
400W TVS Diode
### 1
###### Robust ESD Protection
The SM4F3.3A provides ±30kV IEC 61000-4-2 ESD protection, helping shield sensitive semiconductor devices and interfaces from potentially damaging electrostatic discharge events.
400W TVS Diode
### 2
###### Effective Transient Voltage Suppression
With 400W peak pulse power and an 8V maximum clamping voltage, the device provides a robust barrier against transient voltage spikes while reducing overvoltage stress on protected circuits.
400W TVS Diode
### 3
###### Optimized for 3.3V Systems
A 3.3V working stand-off voltage and low leakage current make the SM4F3.3A suitable for protecting low-voltage power rails, digital I/O, and other sensitive electronic circuits.
400W TVS Diode
### 4
###### Compact Protection for Space-Constrained Designs
The SOD-123FL surface-mount package combines compact dimensions with robust transient protection, making the device well suited to modern compact electronics where PCB real estate is limited.
## Applications
|  |  |
| --- | --- |
| **Industrial & Outdoor Electronics** | **IoT & Smart Devices** |
| - Industrial control electronics - Outdoor electronic equipment - Smart meters - Security cameras | - IoT devices - Sensors - Smart lighting |
|  |  |
| --- | --- |
| Computing & Consumer Electronics | Interface & Power Protection |
| - Notebooks - HDD/SSD - POS terminals - Portable electronic equipment | - 3.3V power rails - GPIO protection - Low-speed interfaces - Digital I/O - Power input protection |
## Product Attributes, Parametrics & Datasheet
| Product | Type | Package | Peak Pulse Power Dissipation PPPM (W) | Reverse Standoff Voltage VRWM(V) | Clamping Voltage Vc (V) | Leakage Current IR Max (µA) | Datasheet |
| --- | --- | --- | --- | --- | --- | --- | --- |
| [SM4F3.3A](https://www.mccsemi.com/products/protection-devices/tvs/sm4f3.3a) | TVS | [SOD-123FL ](https://www.mccsemi.com/pdf/productpackaging/M-SOD-123FL-A-Rev5.pdf) | 400 | 3.3 | 8 | 150 | [Info](https://www.mccsemi.com/pdf/products/SM4F3.3A(SOD-123FL).pdf) |
Now available, purchase directly from MCC or through our authorized distributors.
For technical inquiries or sample requests, [contact MCC](https://www.mccsemi.com/#hs-chat-open) for support.
For a deeper dive into TVS diode applications and best practices, [check out our comprehensive guide.](https://solutions.mccsemi.com/understanding-tvs-diodes-a-comprehensive-guide)
###### Tags:
[New Product Introductions,](https://solutions.mccsemi.com/news/tag/new-product-introductions) [News,](https://solutions.mccsemi.com/news/tag/news) [TVS](https://solutions.mccsemi.com/news/tag/tvs)
#### Related Content
[](https://solutions.mccsemi.com/news/robust-reliable-surge-protection-mccs-3000w-tvs-diode)
April 30, 2025
#### [Robust & Reliable Surge Protection: MCC’s 3000W TVS Diode](https://solutions.mccsemi.com/news/robust-reliable-surge-protection-mccs-3000w-tvs-diode)
[](https://solutions.mccsemi.com/news/mcc-introduces-ultra-compact-tvs-diodes-for-fast-reliable-surge-protection-from-6.5-v-to-58-v)
November 5, 2025
#### [MCC Introduces Ultra-Compact TVS Diodes for Fast, Reliable Surge Protection from 6.5 V to 58 V](https://solutions.mccsemi.com/news/mcc-introduces-ultra-compact-tvs-diodes-for-fast-reliable-surge-protection-from-6.5-v-to-58-v)
[](https://solutions.mccsemi.com/news/mcc-introduces-150w-aec-q101-tvs-diodes-for-automotive-protection)
February 23, 2026
#### [MCC Introduces 150W AEC‑Q101 TVS Diodes for Automotive Protection](https://solutions.mccsemi.com/news/mcc-introduces-150w-aec-q101-tvs-diodes-for-automotive-protection)
[](https://solutions.mccsemi.com/news/protect-high-speed-interfaces-with-mccs-esdsbulcxxvlbq-ultra-low-capacitance-esd-protection-diode-series)
July 10, 2026
#### [Protect High-Speed Interfaces with MCC's ESDSBULCxxVLBQ Ultra-Low Capacitance ESD Protection Diode Series](https://solutions.mccsemi.com/news/protect-high-speed-interfaces-with-mccs-esdsbulcxxvlbq-ultra-low-capacitance-esd-protection-diode-series)
.png?width=50&height=50&name=mcc%20150x150%20(1).png)
Post by [MCC](https://solutions.mccsemi.com/news/author/mcc)
September 8, 2026
MCC is a leading integrated device manufacturer (IDM) of discrete semiconductors worldwide. Headquartered in the US, we deliver supply chain assurance, best-in-class support, and a diverse portfolio of 10,000+ advanced components to help customers innovate in automotive, industrial, and beyond.
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