S8240B RF Antenna Equivalent & Substitute Parts

Part Overview

The S8240B is an 860MHz WiMax™ whip antenna manufactured by TE Connectivity Laird, designed for UHF band applications (824MHz ~ 896MHz). This component features an N Type Female termination with bracket mount configuration and a maximum height of 445.00mm. The S8240B is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

S8240B

TE Connectivity LairdIn Stock: 900S8240B Datasheet

Current PartRFQ

FG8240

TE Connectivity LairdIn Stock: 870FG8240 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S8240B are identified based on the following critical parameters that determine functional compatibility:

Frequency Compatibility: The substitute part must operate within or encompass the 824MHz ~ 896MHz frequency range. Both the main part and substitute operate across this identical UHF band.

Antenna Configuration: The substitute must maintain the same physical form factor (whip, straight configuration) and mounting interface (bracket mount) to ensure mechanical compatibility with existing installations.

Electrical Interface: The substitute must feature N Type Female termination to maintain RF signal path compatibility without requiring adapter components.

Antenna Characteristics: The substitute must provide equivalent or superior gain (0dBd baseline) and acceptable VSWR performance within the operating band.

The FG8240 meets these substitution criteria while offering enhanced specifications in certain parameters.

Parameter Comparison

Engineering Selection Recommendations

FG8240 as Primary Substitute:

The FG8240 is the designated substitute for the obsolete S8240B. Both components share identical frequency range coverage (824MHz ~ 896MHz), antenna configuration (whip, straight), electrical interface (N Type Female), and mounting methodology (bracket mount). The FG8240 maintains active product status with TE Connectivity Laird, ensuring ongoing availability and supply chain continuity.

Specification Differences:

The FG8240 exhibits a VSWR of 2 compared to the S8240B's 1.5, representing a measurable but acceptable variance within typical UHF antenna performance tolerances for the 824MHz ~ 896MHz band. The FG8240 provides a significantly higher power rating of 100 W versus the S8240B's 5 W, offering enhanced thermal margin and operational headroom.

Physical height differs by 64mm (381mm versus 445mm), which may require mechanical validation in space-constrained mounting environments. The FG8240 carries RoHS Compliance certification, meeting current environmental and regulatory requirements.

Compliance Status:

Both components share identical ECCN classification (5A991G) and Moisture Sensitivity Level (MSL 1 - Unlimited), confirming regulatory and environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can the FG8240 directly replace the S8240B in existing WiMax™ installations?

A: Yes. Both components operate across the identical 824MHz ~ 896MHz frequency range, feature N Type Female termination, and employ bracket mount configuration. The FG8240 is mechanically and electrically compatible with S8240B mounting interfaces and RF signal paths.

Q: What is the significance of the VSWR difference between S8240B (1.5) and FG8240 (2)?

A: VSWR of 1.5 versus 2 represents acceptable performance variation within UHF antenna specifications. The FG8240's VSWR of 2 remains within standard engineering tolerances for the 824MHz ~ 896MHz band and does not preclude functional substitution.

Q: Why is the FG8240 physically shorter than the S8240B?

A: The FG8240 measures 381mm versus the S8240B's 445mm. This 64mm height difference results from design optimization in the active FG8240 variant. Mechanical clearance validation is required if the antenna installation space is constrained.

Q: Does the FG8240's higher power rating (100 W vs. 5 W) affect compatibility?

A: No. Higher power rating indicates enhanced thermal capability and operational margin. The FG8240 accommodates the S8240B's 5 W power requirement with substantial headroom, ensuring reliable performance across the operating range.

Q: Are there regulatory or compliance differences between these components?

A: Both components share identical ECCN classification (5A991G) and MSL rating (1 - Unlimited). The FG8240 carries RoHS Compliance certification, meeting current environmental standards. No regulatory barriers exist to substitution.

Q: What is the center frequency difference between 860MHz (S8240B) and 835MHz (FG8240)?

A: Both components operate across the full 824MHz ~ 896MHz frequency range. The center frequency designation reflects design optimization but does not limit operational bandwidth. Both antennas function across the complete UHF band specified.

Q: Is the FG8240 available in the same packaging as the S8240B?

A: The FG8240 is supplied in Bulk packaging. Packaging configuration should be verified against procurement requirements and inventory management protocols.