1812J2000393MJTE03

Overview

The Knowles Syfer part number 1812J2000393MJTE03 is a feed-through capacitor designed for surface mount technology. It features a capacitance of 0.039 µF and a voltage rating of 200 VDC. The component operates within a temperature range of -55°C to +125°C. Its physical dimensions conform to the standard 1812 (4532 metric) package size, measuring 4.5 mm in length, 3.2 mm in width, and 2.5 mm in height. The device includes an integrated current rating of 50 mA.

Feature Summary

• Integrates feed-through filtering functionality directly into a surface-mount footprint
• Supports high-frequency noise suppression with a rated current capacity of 50 mA
• Constructed for reliable operation across extended industrial temperature ranges

Applications

• High-frequency signal line filtering in electronic circuits
• Power supply input stages requiring noise attenuation
• Compact PCB designs needing integrated feed-through solutions

Procurement Notes

Verify the specific application requirements against the 50 mA current rating and 200 VDC voltage limit before procurement. Confirm that the 1812 footprint matches the target PCB layout constraints. Ensure the operating environment remains within the specified -55°C to +125°C range. Cross-reference the datasheet for soldering profile recommendations to maintain component integrity during assembly processes.

Selection Notes

Select this component when space-constrained designs require both decoupling and feed-through filtering capabilities. The 1812 package offers a balance between electrical performance and board area efficiency. Consider the 50 mA current handling capability to ensure it meets the circuit's load requirements without derating issues. Evaluate the thermal management needs given the wide operating temperature specification.

Part Context

This component belongs to the Knowles Syfer feed-through capacitor series, which combines ceramic dielectric properties with a specialized internal structure. Unlike standard MLCCs, these devices are engineered to provide superior high-frequency attenuation. The 1812J series specifically targets applications demanding robust noise suppression in compact form factors, bridging the gap between discrete filters and standard capacitors.

Replacement Considerations

No public confirmed substitute part numbers are available.