Equivalent & Substitute Parts Reference: Parallax Inc. 28502

Part Overview

The Parallax Inc. 28502 is a 1.575GHz GPS module RF antenna with MMCX termination and magnetic mounting. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring GPS navigation capabilities at this frequency band.

Substiute Parts

28502

Parallax Inc.In Stock: 85428502 Datasheet

Current PartRFQ

960

Keystone ElectronicsIn Stock: 1035960 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution analysis for the Parallax Inc. 28502 GPS antenna module is constrained by the limited technical parameters provided in the substitute part list. The identified substitute part, Keystone Electronics 960, is classified as a modular connector (RJ45 jack) rather than an RF antenna component.

Critical Parameter Mismatch:

The substitute part (960) does not share the core functional parameters that define the main part:

• RF Frequency Specification: Main part operates at 1.575GHz (GPS navigation band); substitute part contains no RF frequency specification
• Antenna Type: Main part is an RF antenna module; substitute part is a modular connector jack
• Termination Type: Main part uses MMCX RF termination; substitute part uses 8p8c (RJ45 Ethernet) termination
• Application Domain: Main part is GPS navigation; substitute part is data connectivity

Substitution Validity: Based on the provided parameters, the Keystone Electronics 960 does not constitute a functional equivalent for the Parallax Inc. 28502 GPS antenna module. The parts operate in different functional categories and frequency domains.

Parameter Comparison

Engineering Selection Recommendations

The Keystone Electronics 960 cannot be selected as a functional substitute for the Parallax Inc. 28502 based on the provided technical parameters. The parts serve fundamentally different functions within separate product categories:

• The 28502 is an RF antenna component for GPS navigation systems operating at 1.575GHz
• The 960 is a modular connector for Ethernet data transmission

Compliance Considerations: While both parts share identical MSL ratings and ECCN classifications, these regulatory parameters do not establish functional equivalence. The substitute part's RoHS3 compliance and REACH documentation represent regulatory advantages but do not address the absence of RF antenna functionality or GPS frequency band operation.

Recommendation: Identification of genuine substitute parts for the Parallax Inc. 28502 requires sourcing components that specify:

• 1.575GHz center frequency operation
• GPS navigation band capability
• MMCX or compatible RF termination
• Module-type antenna configuration
• Magnetic mounting compatibility

Frequently Asked Questions (FAQ)

Q: Can the Keystone Electronics 960 replace the Parallax Inc. 28502 in a GPS antenna application?

A: No. The 960 is an RJ45 modular connector jack designed for Ethernet data connectivity. It does not contain RF antenna functionality, does not operate at GPS frequencies, and uses incompatible termination (8p8c vs. MMCX). These parts operate in different functional domains and are not interchangeable.

Q: What parameters determine substitutability for GPS antenna modules?

A: Functional substitutability requires matching specifications in: center frequency (1.575GHz for GPS L1 band), antenna type (module configuration), RF termination type (MMCX), mounting method (magnetic), and cable length (2.74m). The substitute part must be classified as an RF antenna component, not a connector or data interface device.

Q: Why is the Keystone Electronics 960 listed as a substitute if it is not compatible?

A: The provided substitute list may contain data entry errors or cross-reference inconsistencies. Based on strict technical parameter analysis, the 960 does not meet the functional requirements for GPS antenna substitution. Engineering selection must prioritize functional parameter matching over database cross-references.

Q: Are there compliance advantages to using the Keystone Electronics 960?

A: The 960 provides documented RoHS3 compliance and REACH status, whereas the 28502 specifications do not include these certifications. However, regulatory compliance does not establish functional equivalence. A substitute part must satisfy both functional requirements and compliance obligations.

Q: What should be done if the Parallax Inc. 28502 is no longer available?

A: Conduct a sourcing search for GPS antenna modules specifying 1.575GHz operation, MMCX termination, magnetic mounting, and module antenna type. Verify frequency band compatibility with the target GPS receiver and confirm cable length requirements. Consult with component distributors specializing in RF and antenna components for current alternatives.