Film Capacitor Replacement Strategy Following Box-Type Series Discontinuation

Background

Discontinuation of box-type film capacitors, including 5 mm pitch metallized film capacitors and X2 safety capacitors, requires design engineers to identify functionally equivalent components for ongoing production. Replacement selection must consider electrical ratings, dielectric type, safety certification, and mechanical compatibility.

Equivalent Product Series

For applications previously using box-type film capacitors, TS05 metallized polyester film capacitors and TS08S X2 safety capacitors provide alternative options depending on circuit function.

• TS05 – general-purpose metallized polyester film capacitor
• TS08S – metallized polypropylene X2 safety capacitor for across-the-line use

Application Scope

• Signal coupling and decoupling networks
• Timing and filtering circuits
• AC line EMI suppression
• General-purpose film capacitor applications

Design Considerations

• Verify capacitance value and tolerance against original design
• Confirm rated voltage and impulse handling capability
• Check lead pitch and body dimensions for PCB compatibility
• Ensure safety certification requirements for X2 applications
• Evaluate dielectric material differences between polyester and polypropylene

Supply Continuity

Availability of alternative film capacitor series supports continued production without redesign of the power input or filtering stages when mechanical and electrical parameters are matched.

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