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Manufacturer Part #


SMM4F Series 400 W 30 V Uni Directional Transient Voltage Suppressor - DO-222AA

Mfr. Name: STMicroelectronics
Standard Pkg:
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Product Specification Section
Technical Attributes
Attributes Table
Breakdown Voltage-Max: 31.5V
Breakdown Voltage-Min: 28.5V
Clamping Voltage-Max: 53.5V
Directional: Uni-Directional
Power Dissipation: 400W
Package Style:  DO-222AA
Mounting Method: Surface Mount
Features & Applications
The SMM4F Series 400 W 22 V Uni Directional Transient Voltage Suppressor - DO-222AA and This series has been designed to protect sensitive equipment against electro-static discharges according to IEC 61000-4-2, MIL STD 883 Method 3015, and electrical over stress such as IEC 61000-4-4 and 5. They are generally for surges below 400 W 10/1000 μs.

This planar technology makes it compatible with high-end equipment and SMPS where low leakage current and high junction temperature are required to provide reliability and stability over time. Their low clamping voltages provide a better safety margin to protect sensitive circuits with extended life time expectancy. Packaged in STmite flat, this minimizes PCB space consumption (footprint in accordance with IPC 7531 standard).


  • Typical peak pulse power:
    • 400 W (10/1000 μs)
    • 2.4 kW (8/20 μs)
  • Stand off voltage range: from 5 V to 33 V
  • Unidirectional types
  • Low leakage current:
    • 0.2 μA at 25 °C
    • 1 μA at 85 °C
  • Operating Tj max: 175 °C
  • JEDEC registered package outline
  • RoHS package
  • Halogen free molding compound
Pricing Section
Minimum Order:
Multiple Of:
On Order:
Factory Stock:Factory Stock:
Factory Lead Time:
19 Weeks
Web Price
Product Variant Information section