8118

Overview

The Bourns 8118 is a common mode choke filter from the J.W. Miller series, designed for through-hole mounting. It features an inductance of 7.3 mH measured at 15 kHz and supports a maximum DC current of 9.3 A. The component has a maximum DC resistance of 32 mOhms and operates within a temperature range of -55°C to +105°C. This unshielded device is classified under inductors, chokes, and coils.

Feature Summary

• Blocks unwanted high-frequency signals while allowing DC and low-frequency signals to pass
• Provides dielectric strength of 1500 Vrms for electrical isolation

Applications

• Linear and switch mode power supplies
• Industrial circuits requiring transient voltage suppression
• Automotive and industrial circuit protection

Procurement Notes

Verify availability status carefully as this specific part number is listed as discontinued or restricted in some distributor databases. Confirm if the 8118-RC variant with optional headers is an acceptable alternative for your design requirements. Check RoHS compliance status directly with the manufacturer as records indicate non-compliance for the base model.

Selection Notes

Select this component when high current handling up to 9.3 A is required alongside significant common mode noise attenuation. Ensure the PCB layout accommodates radial through-hole pins and the physical size constraints of the unshielded toroid design. Verify that the operating environment stays within the specified -55°C to +105°C thermal limits.

Part Context

This component belongs to the Bourns J.W. Miller 8100 series of common mode chokes. It is manufactured by Bourns Inc., which produces components for linear and switch mode power supplies emphasizing reliability in compact designs. The product falls under the subcategory of inductors, chokes, and coils.

Replacement Considerations

The 8118-RC is a documented variant offering common mode inductor functionality with optional headers. Verify pin compatibility and mechanical dimensions before substitution.