TE Connectivity Laird P4573 RF Antenna Equivalent & Substitute Parts

Part Overview

The TE Connectivity Laird P4573 is a 460MHz Yagi RF antenna designed for UHF applications within the 450MHz to 470MHz frequency band. This antenna features a 6dBi gain rating and utilizes UHF termination with bracket mount configuration. The unit measures 15.354 inches (390.00mm) in height and is classified as obsolete, with 1149 pieces currently available in new original stock condition.

Due to its obsolete product status, identifying functionally equivalent substitute components is essential for system continuity, design updates, and long-term supply chain planning. The substitute part identified maintains core operational parameters while offering enhanced performance characteristics and active product status.

Substiute Parts

P4573

TE Connectivity LairdIn Stock: 1247P4573 Datasheet

Current PartRFQ

Y4503

TE Connectivity LairdIn Stock: 830Y4503 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4573 is determined by strict adherence to the following parameters:

Mandatory Matching Parameters:

• Frequency band: 450MHz ~ 470MHz (center frequency 460MHz)
• Antenna type: Yagi configuration
• Mounting interface: Bracket mount capability
• Frequency group: UHF band classification
• Compliance: RoHS compliant status

Compatible Variation Parameters:

• Termination type: May differ from UHF (N Type Female acceptable with interface adapter consideration)
• Gain specification: May exceed 6dBi minimum
• Physical height: May vary within mechanical envelope constraints
• VSWR and Return Loss: Enhanced specifications acceptable

The substitute part Y4503 satisfies all mandatory matching parameters while providing improved electrical performance through higher gain (7.1dBd), defined VSWR (1.5), and specified return loss (-10dB). The termination change from UHF to N Type Female represents a connector interface modification rather than a functional incompatibility.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The Y4503 is a valid substitute for the P4573 based on identical frequency band operation, matching Yagi antenna architecture, and equivalent bracket mount interface. Both components maintain RoHS compliance and operate within the UHF frequency group classification.

Product Status Consideration:

The P4573 carries obsolete status, indicating discontinued manufacturing and limited long-term availability assurance. The Y4503 maintains active product status, ensuring continued supply chain access, technical support, and manufacturing consistency.

Performance Enhancement:

The Y4503 provides measurable electrical improvements including higher gain specification (7.1dBd versus 6dBi), defined VSWR (1.5), and specified return loss (-10dB). These parameters indicate optimized impedance matching and radiation efficiency compared to the P4573.

Interface Modification:

The termination change from UHF to N Type Female requires connector interface evaluation. System designs utilizing UHF connectors must incorporate appropriate adapter or transition components to accommodate the N Type Female termination on the Y4503.

Mechanical Envelope:

The Y4503 exhibits increased physical height (20.187 inches versus 15.354 inches). Installation environments must accommodate this dimensional increase within mounting structure and clearance constraints.

Frequently Asked Questions (FAQ)

Q: Can the Y4503 directly replace the P4573 without modifications?

A: The Y4503 is functionally equivalent for RF performance within the 450MHz to 470MHz band. However, the termination change from UHF to N Type Female requires connector interface adaptation. Mechanical envelope increase must be verified against installation space constraints.

Q: What is the significance of the gain difference between 6dBi and 7.1dBd?

A: Both measurements express antenna gain; dBi references isotropic radiation while dBd references dipole radiation. The Y4503 specification indicates enhanced directional performance and radiation efficiency compared to the P4573.

Q: Why is the Y4503 height specification larger than the P4573?

A: The Y4503 incorporates a 3-element Yagi configuration, which requires extended physical length to achieve the specified 7.1dBd gain. The P4573 uses a simpler Yagi design resulting in the shorter 15.354-inch dimension.

Q: Are both parts suitable for the same power levels?

A: The Y4503 specifies 300W maximum power handling. The P4573 does not provide power specification in available documentation. System power requirements must be evaluated against the Y4503 300W rating.

Q: What connector adapter is required for UHF to N Type Female conversion?

A: Adapter selection depends on specific system connector configuration. Standard UHF-to-N Type Female adapters are commercially available. Adapter impedance matching and frequency response must be verified for 450MHz to 470MHz operation.

Q: Is the Y4503 RoHS compliant like the P4573?

A: Yes, the Y4503 maintains RoHS compliance status identical to the P4573, satisfying environmental and regulatory requirements.

Q: What is the inventory status for both parts?

A: The P4573 has 1149 pieces available in new original stock. The Y4503 has 768 pieces available in new original stock. Both components are currently in inventory.

Q: Should the P4573 be used despite obsolete status if Y4503 is available?

A: The Y4503 is recommended for new designs and system updates due to active product status, ensuring long-term availability and manufacturing consistency. The P4573 may be retained for existing systems where termination compatibility and mechanical envelope constraints are satisfied.