RFBPF2012100KST Equivalent & Substitute Parts

Part Overview

The RFBPF2012100KST is a 5.4GHz center frequency band pass RF filter manufactured by Walsin Technology Corporation in 0603 (1608 Metric) surface mount package. This component is designed for radio frequency applications requiring selective frequency filtering with 1GHz bandwidth and 1.5dB insertion loss. The part is currently active in production with 5844 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for band pass RF filter applications.

Substiute Parts

RFBPF2012100KST

Walsin Technology CorporationIn Stock: 5896RFBPF2012100KST Datasheet

Current PartRFQ

BPF2012LL01R5000A

Pulse ElectronicsIn Stock: 15854BPF2012LL01R5000A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RFBPF2012100KST is determined by the following critical parameters:

• Center Frequency: Operating frequency must remain within the 5.4GHz specification band
• Filter Type: Band pass filtering characteristic must be maintained
• Insertion Loss: Maximum 1.5dB insertion loss requirement
• Ripple: 0.6dB ripple specification
• Mounting Type: Surface mount compatibility required
• Compliance: ROHS3 compliance and MSL Level 1 rating required

The substitute part BPF2012LL01R5000A from Pulse Electronics meets these electrical criteria with a 5.425GHz center frequency (within operational tolerance of the 5.4GHz specification) and identical insertion loss and ripple characteristics. However, the substitute uses a 0805 (2012 Metric) package, which represents a mechanical difference in physical dimensions and pad configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the RFBPF2012100KST and BPF2012LL01R5000A are active production components with ROHS3 compliance and MSL Level 1 ratings, meeting regulatory and environmental requirements for equivalent application use.

The primary consideration for component selection is the package size difference. The RFBPF2012100KST uses a 0603 (1608 Metric) package with dimensions of 1.60mm x 0.80mm and maximum height of 0.70mm. The substitute BPF2012LL01R5000A uses a 0805 (2012 Metric) package with dimensions of 2.00mm x 1.25mm and maximum height of 1.15mm. This size increase affects PCB layout, available board space, and component density considerations.

Electrical performance is equivalent between the two parts, with center frequency separation of 0.025GHz (25MHz) representing negligible deviation within typical RF filter application tolerances. Both parts maintain identical insertion loss (1.5dB) and ripple (0.6dB) specifications.

Frequently Asked Questions (FAQ)

Q: Can BPF2012LL01R5000A replace RFBPF2012100KST in all applications?

A: Electrical substitution is valid based on matching insertion loss, ripple, and center frequency specifications. However, the larger 0805 package footprint requires PCB layout modification and may not fit space-constrained designs intended for 0603 components.

Q: What is the frequency difference between these parts?

A: The RFBPF2012100KST operates at 5.4GHz center frequency while the BPF2012LL01R5000A operates at 5.425GHz center frequency. The 25MHz difference is within typical RF filter operational tolerance for band pass applications.

Q: Are both parts compliant with environmental and regulatory standards?

A: Both parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, meeting equivalent environmental and regulatory requirements.

Q: What are the physical constraints when using the substitute part?

A: The BPF2012LL01R5000A is larger in all dimensions: 0.19mm longer, 0.45mm wider, and 0.45mm taller than the RFBPF2012100KST. PCB footprint and assembly clearance must be verified before substitution.

Q: Do both parts use the same pad configuration?

A: Both parts use 4 PC Pad surface mount configuration, maintaining electrical connection compatibility despite the different package sizes.