SFJNC1K00333MX1

Overview

The Knowles Syfer SFJNC1K00333MX1 is an EMI feedthrough filter capacitor designed for high-voltage applications. It features a capacitance of 0.033 µF with a voltage rating of 1 kV DC. The component utilizes X7R dielectric material and offers a tolerance of ±20%. It is constructed in an axial package with dimensions of approximately 9.80 mm diameter by 9.40 mm length. The device supports a maximum DC current of 5 A and operates within a temperature range of -55°C to +125°C.

Feature Summary

• Provides effective electromagnetic interference suppression through feedthrough filtering architecture
• Engineered for high-voltage direct current environments up to 1 kV
• Utilizes X7R ceramic dielectric for stable performance across wide temperature ranges

Applications

• Pulse power systems requiring reliable energy discharge
• Medical imaging equipment demanding low magnetic interference
• Aerospace and defense electronic assemblies
• Industrial control systems operating in harsh environments

Procurement Notes

Verify the specific voltage rating and capacitance value against the application requirements, as datasheets may list variations within the SFJN series. Confirm RoHS compliance status directly with the manufacturer or authorized distributor before procurement. Ensure the axial package dimensions fit the designated panel or chassis mounting space. Check for any recent product discontinuation notifications or lifecycle changes associated with this part number.

Selection Notes

Select this component when high-voltage isolation and EMI attenuation are critical. The 1 kV rating distinguishes it from lower-voltage counterparts in the SFJN family. Consider the thermal characteristics of the X7R dielectric for stability under varying load conditions. Evaluate the physical size constraints against the available mounting area. Compare current handling capabilities with other series options if higher amperage is required.

Part Context

This component belongs to the Knowles Syfer SFJN series of feedthrough capacitors. These filters are specifically engineered for high-reliability applications in aerospace, defense, and medical sectors. The series emphasizes compact form factors combined with robust electrical performance. The SFJNC variant typically denotes specific construction or termination styles within the broader feedthrough capacitor portfolio.

Replacement Considerations

Direct substitutes include other SFJN series parts with matching 1 kV ratings and similar capacitance values, such as SFJNC1K00103MX1 or SFJNC1K00473MX1. Verify that alternative models maintain the same axial package dimensions and mounting thread specifications. Ensure the replacement part meets the same X7R temperature coefficient and current handling requirements.