VFS9VD31B223Q55B

Overview

The VFS9VD31B223Q55B is a radial leaded varistor from the Murata EMIGUARD series, designed for surge protection in power supply circuits. It features a DC voltage rating of 12V and a varistor voltage of 22V with a tolerance of 20%. The component has a capacitance of 0.022µF and a current rating of 7A. Operating temperature ranges from -40°C to +100°C. Dimensions are 12mm length by 7.5mm width with a 2.5mm lead spacing.

Feature Summary

• Provides high surge current protection for electric circuits against transient voltage spikes.
• Functions as an LC (T-Type) EMI filter combining varistor action with low-pass filtering characteristics.
• Utilizes radial through-hole mounting for reliable PCB integration.

Applications

• Surge protection for power supply inputs
• EMI/RFI suppression in electronic circuits
• Transient voltage spike mitigation

Procurement Notes

Verify end-of-life status and availability constraints before procurement planning. Confirm RoHS compliance details via official documentation. Check regional sales restrictions and substitute part numbers if this specific variant is discontinued or limited in supply.

Selection Notes

Select this component when 12V DC operation and 22V clamping voltage are required. Ensure the 7A current rating meets circuit surge demands. Verify that the 0.022µF capacitance aligns with EMI filtering requirements. Confirm physical dimensions fit the target PCB layout.

Part Context

This part belongs to the Murata VFS9V series of EMIGUARD varistors. These components integrate varistor technology with filtering capabilities to address both surge immunity and electromagnetic interference in compact form factors suitable for consumer and industrial electronics.

Replacement Considerations

Publicly confirmed substitute part numbers for VFS9VD31B223Q55B are not available in the provided source data. Consult manufacturer documentation for direct equivalents or functional replacements.