RF ANT 315MHZ HELICAL SCREW-MNT (PU-M4-315) Equivalent & Substitute Parts

Part Overview

The PU-M4-315 is a 315MHz helical RF antenna with screw-mount termination and through-hole mounting configuration, manufactured by RF Solutions. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system support and new design implementations. The helical antenna design operates within the UHF frequency band (300MHz to 1GHz) and is commonly deployed in ISM band applications including remote control systems, security systems, and alarm devices.

Substiute Parts

PU-M4-315

RF SolutionsIn Stock: 997PU-M4-315 Datasheet

Current PartRFQ

ANT-315-PW-LP

TE Connectivity LinxIn Stock: 1078ANT-315-PW-LP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PU-M4-315 is determined by the following mandatory alignment criteria:

Frequency Alignment: The substitute part must operate at 315MHz center frequency within the UHF band to maintain RF performance in the target application.

Termination Compatibility: Screw-mount termination is required to ensure mechanical and electrical connection compatibility with existing PCB layouts and enclosure designs.

Mounting Configuration: While the main part specifies through-hole mounting and the substitute specifies panel mount, both configurations utilize screw-mount termination as the primary interface. The ANT-315-PW-LP accommodates screw-mount installation in panel-mount applications, providing functional equivalence for systems where the antenna connects via screw termination.

Frequency Range Coverage: The substitute part operates across 312MHz to 318MHz, which encompasses the 315MHz center frequency of the main part, ensuring compatibility within ISM band specifications.

Environmental Classification: Both parts maintain MSL 1 (Unlimited) moisture sensitivity, indicating equivalent environmental performance.

The ANT-315-PW-LP from TE Connectivity Linx qualifies as a functional substitute based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The PU-M4-315 is classified as obsolete. The ANT-315-PW-LP is an active product from a major connector and antenna manufacturer (TE Connectivity Linx), ensuring ongoing availability and supply chain continuity.

Compliance and Certification: The ANT-315-PW-LP carries RoHS Compliance and REACH Unaffected status, meeting modern regulatory requirements. Both parts share ECCN EAR99 classification for export control purposes.

Frequency Performance: Both parts operate at 315MHz within the UHF band. The substitute provides specified VSWR (1.9) and gain (-4dBi) parameters, enabling quantitative RF performance assessment.

Mechanical Integration: The transition from through-hole to panel-mount configuration requires enclosure design evaluation. The screw-mount termination remains consistent, but physical mounting methodology differs. The substitute antenna is 22.5mm shorter (50.50mm vs. 72.00mm), which may affect spatial constraints in existing designs.

Application Alignment: The ANT-315-PW-LP is explicitly rated for Alarms, ISM, Remote Control, and Security Systems applications, matching the typical deployment profile of 315MHz antennas.

Frequently Asked Questions (FAQ)

Q: Can the ANT-315-PW-LP directly replace the PU-M4-315 without design modification?

A: Both parts share 315MHz center frequency and screw-mount termination. However, the mounting type differs (through-hole vs. panel-mount) and the substitute is 22.5mm shorter. Enclosure and PCB layout modifications may be required to accommodate the panel-mount configuration and reduced height.

Q: What is the significance of the antenna type difference (helical vs. whip)?

A: Antenna type affects radiation pattern and physical form factor. The helical design of the main part and whip design of the substitute produce different directional characteristics. Both operate at 315MHz, but radiation patterns and gain profiles differ. The substitute specifies -4dBi gain; the main part does not provide gain specification.

Q: Are both parts suitable for ISM band applications?

A: Yes. Both operate at 315MHz within the UHF ISM band. The substitute explicitly lists ISM applications. The main part's application profile is not specified in available data.

Q: What does the VSWR value of 1.9 indicate for the substitute part?

A: VSWR (Voltage Standing Wave Ratio) of 1.9 indicates impedance matching efficiency. Lower VSWR values represent better impedance matching. This specification is provided for the substitute but not for the main part, limiting direct RF performance comparison.

Q: Are there environmental or storage differences between these parts?

A: Both parts maintain MSL 1 (Unlimited) moisture sensitivity classification, indicating equivalent environmental performance and unlimited shelf life under standard storage conditions.

Q: What is the significance of RoHS compliance for the substitute part?

A: RoHS Compliance indicates the ANT-315-PW-LP meets Restriction of Hazardous Substances regulations, required for many modern applications and markets. The main part's RoHS status is not specified.

Q: How does the packaging difference affect component handling?

A: The main part is packaged in bulk format with 898 pieces in stock. The substitute is also bulk packaged with 1062 pieces available. Packaging format does not affect electrical or mechanical compatibility.