4DFA-904A-10=P

Overview

The 4DFA-904A-10=P is a surface-mount dielectric bandpass filter manufactured by Toko America Inc. Designed for the 700–2500 MHz frequency range, this component features a center frequency of 904 MHz with a bandwidth of 1 MHz. It operates within a temperature range of −40°C to +85°C and utilizes a 5-SMD package measuring 12.50mm x 12.50mm. Key electrical specifications include an insertion loss of 3.8 dB and ripple of 0.5 dB.

Feature Summary

• Surface mount construction for automated assembly
• Dielectric technology for stable RF performance
• Compact footprint suitable for space-constrained designs

Applications

• Wireless communication systems operating at 904 MHz
• Industrial, Scientific, and Medical (ISM) radio equipment
• RF front-end filtering in mobile devices

Procurement Notes

Verify the complete part number including the suffix =P when ordering to ensure correct packaging configuration. Confirm that the supplier provides official datasheets matching the 4DFA series specifications. Check for authenticity through authorized distributors to avoid counterfeit components. Ensure storage conditions align with the specified temperature range prior to installation.

Selection Notes

Select this component when a narrow 1 MHz bandwidth is required at 904 MHz. The 5-SMD package size must fit the available PCB area. Consider the 3.8 dB insertion loss impact on system sensitivity. Verify compatibility with the target frequency range of 700–2500 MHz. Evaluate thermal requirements against the −40°C to +85°C operational limit.

Part Context

This part belongs to the 4DFA series of two-pole SMD dielectric filters from Toko America Inc. The series covers frequencies from 700 to 2500 MHz. It is distinct from the three-pole 4DFB series. The design focuses on compact RF filtering solutions for modern electronic devices requiring precise frequency selection.

Replacement Considerations

Consult official substitution lists for equivalent 904 MHz bandpass filters. Verify that any alternative matches the 1 MHz bandwidth and 5-SMD package dimensions. Ensure replacement parts meet the same insertion loss and ripple specifications.