RF Attenuator 4302-52 Equivalent & Substitute Parts

Part Overview

The 4302-52 is an RF attenuator manufactured by pSemi, designed for signal attenuation applications across DC to 4 GHz frequency range with 31.5 dB attenuation and 50 Ohm impedance. The part is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations. The 20-WFQFN Exposed Pad package provides compact integration for RF circuit applications.

Substiute Parts

4302-52

pSemiIn Stock: 26114302-52 Datasheet

Current PartRFQ

PE4312C-Z

pSemiIn Stock: 34239PE4312C-Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 4302-52 are identified based on matching the following critical electrical and mechanical parameters:

• Attenuation Value: 31.5 dB (exact match required)
• Impedance: 50 Ohms (exact match required)
• Frequency Range: Minimum coverage of DC to 4 GHz operating band
• Package Type: 20-pin QFN with Exposed Pad configuration
• Moisture Sensitivity Level: MSL 1 or better

The PE4312C-Z meets these substitution criteria with compatible electrical specifications and package footprint, though with a minimum frequency specification of 1 MHz rather than DC.

Parameter Comparison

Engineering Selection Recommendations

The PE4312C-Z serves as the active production equivalent for the obsolete 4302-52. Both parts share identical attenuation and impedance specifications with compatible 20-pin QFN Exposed Pad packages. The PE4312C-Z is RoHS Compliant and maintains active product status with established supply availability.

The primary electrical difference is the minimum frequency specification: PE4312C-Z operates from 1 MHz minimum versus the 4302-52's DC specification. For applications requiring DC or sub-1 MHz operation, this frequency floor must be evaluated against system requirements. For standard RF applications operating above 1 MHz, the PE4312C-Z provides direct functional equivalence.

Package variants exist between the two parts (WFQFN versus VFQFN), requiring PCB layout verification to confirm footprint compatibility despite both being 20-pin QFN configurations.

Frequently Asked Questions (FAQ)

Q: Can PE4312C-Z directly replace 4302-52 in existing designs?

A: PE4312C-Z provides electrical equivalence for attenuation (31.5 dB) and impedance (50 Ohms) specifications. PCB footprint compatibility must be verified between 20-WFQFN and 20-VFQFN packages. Applications operating above 1 MHz frequency are fully compatible; DC and sub-1 MHz applications require frequency specification review.

Q: What is the significance of the frequency range difference?

A: The 4302-52 specifies 0 Hz ~ 4 GHz while PE4312C-Z specifies 1 MHz ~ 4 GHz. This represents a 1 MHz minimum frequency floor on the substitute part. System designs operating exclusively above 1 MHz are unaffected. Applications requiring DC or very low frequency attenuation must evaluate alternative parts or confirm PE4312C-Z performance in the required frequency band.

Q: Are the QFN packages interchangeable?

A: Both parts use 20-pin QFN Exposed Pad packages, but the 4302-52 uses WFQFN variant while PE4312C-Z uses VFQFN variant. Physical dimensions and pad layouts may differ. PCB design files and component datasheets must be cross-referenced to confirm mechanical compatibility before design release.

Q: What compliance certifications apply to PE4312C-Z?

A: PE4312C-Z is RoHS Compliant. Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Moisture Sensitivity Level is MSL 1 (Unlimited) for both parts, indicating no moisture sensitivity constraints during storage or handling.