B57234S0221M051

Overview

The B57234S0221M051 is a leaded varistor from EPCOS, designed for overvoltage protection in consumer and industrial applications. It features a maximum DC operating voltage of 385V and an AC rating of 300Vrms. The component handles a nominal discharge current of 3kA (8/20µs) and a maximum surge current of 6kA (8/20µs). It absorbs 125J of energy with a typical capacitance of 400pF. Dimensions include a body width of 17.50mm max, height of 23.00mm max, and wire spacing of 7.50mm ±1.00mm.

Feature Summary

• Provides robust overvoltage protection against electrical surges
• Capable of handling high impulse currents up to 6kA
• Designed for integration into consumer and industrial electronic circuits

Applications

• Consumer electronics protection
• Industrial equipment surge suppression
• General circuit overvoltage safeguarding

Procurement Notes

Verify the specific safety certification documents and welding guidelines referenced in the official datasheet prior to implementation. Confirm that the component meets all required environmental standards for the intended application environment. Ensure compatibility with the specified soldering methods outlined in the manufacturer's documentation to maintain reliability.

Selection Notes

Select this component based on the required voltage ratings and surge current capacity. The 385V DC and 300V AC limits define the operational boundary. Consider the 125J energy absorption capability for transient events. Verify physical dimensions fit the design constraints, particularly the 17.50mm width and 7.50mm lead spacing.

Part Context

This part belongs to the EPCOS varistor family, now under TDK Electronics. It serves as a protective element against voltage spikes. The product line focuses on providing reliable protection for sensitive electronic components in various market segments including automotive, industrial, and consumer electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data.