TE Connectivity Laird TRA18503 RF Antenna Equivalent & Substitute Parts

Part Overview

The TE Connectivity Laird TRA18503 is a 1.9GHz dome RF antenna designed for GSM and PCS applications. This antenna operates in the UHF frequency band (1GHz ~ 2GHz) with a center frequency of 1.9GHz and a frequency range of 1.85GHz ~ 1.99GHz. The part features an NMO base mount termination, 3dBi gain, and a maximum power rating of 100W. The TRA18503 is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and component procurement. Active alternatives with identical electrical and mechanical specifications are available to ensure design continuity and system compatibility.

Substiute Parts

TRA18503

TE Connectivity LairdIn Stock: 1194TRA18503 Datasheet

Current PartRFQ

TRAB18503

TE Connectivity LairdIn Stock: 1020TRAB18503 Datasheet

Parametric EquivalentRFQ

TLS.20.1F11

Taoglas LimitedIn Stock: 784TLS.20.1F11 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TRA18503 are classified based on strict electrical and mechanical parameter matching. The primary substitution criterion is functional equivalence across the following parameters:

Critical Matching Parameters:

• Frequency (Center/Band): 1.9GHz
• Frequency Range: 1.85GHz ~ 1.99GHz
• Antenna Type: Dome
• Gain: 3dBi
• VSWR: 2
• Termination: NMO
• Mounting Type: Base Mount
• Height (Max): 2.700" (68.58mm)
• Power - Max: 100W
• Applications: GSM, PCS
• RF Family/Standard: Cellular, General ISM
• Frequency Group: UHF (1GHz ~ 2GHz)

Parametric Equivalent Classification: The TRAB18503 from TE Connectivity Laird is a parametric equivalent. This part maintains identical electrical specifications (frequency range, gain, VSWR, power rating) and mechanical specifications (NMO termination, base mount, height) as the TRA18503. The primary distinction is product status: TRAB18503 is active, whereas TRA18503 is obsolete. This part is suitable for direct replacement in new designs and legacy system support.

Similar Part Classification: The TLS.20.1F11 from Taoglas Limited is classified as a similar part but does not qualify as a direct substitute. This part operates at 460MHz (CDMA), which falls outside the 1.9GHz frequency band required for GSM and PCS applications. Additionally, the TLS.20.1F11 features a whip antenna type with N Type Male termination, differing from the dome antenna with NMO termination of the TRA18503. These differences preclude functional equivalence for applications requiring 1.9GHz operation.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalent):

The TRAB18503 is the recommended substitute for the obsolete TRA18503. Both parts are manufactured by TE Connectivity Laird and maintain identical electrical and mechanical specifications. The TRAB18503 is currently in active production status with 982 units in stock, ensuring availability for procurement. Both parts carry RoHS compliance certification and MSL 1 rating, meeting environmental and reliability requirements. The TRAB18503 can be selected for new designs and legacy system support without modification to existing mechanical interfaces or electrical connections.

For Alternative Consideration (Similar Part):

The TLS.20.1F11 from Taoglas Limited is not suitable as a substitute for the TRA18503 in GSM and PCS applications. The frequency mismatch (460MHz versus 1.9GHz) and termination difference (N Type Male versus NMO) make this part incompatible with systems designed for 1.9GHz operation. This part is applicable only to CDMA systems operating in the 450MHz ~ 470MHz band. Selection of TLS.20.1F11 would require complete system redesign and is not recommended for TRA18503 replacement.

Frequently Asked Questions (FAQ)

Q: Can the TRAB18503 be used as a direct replacement for the TRA18503?

A: Yes. The TRAB18503 is a parametric equivalent with identical electrical specifications (1.9GHz center frequency, 1.85GHz ~ 1.99GHz frequency range, 3dBi gain, 2 VSWR) and mechanical specifications (NMO termination, base mount, 2.700" height, 100W power rating). The primary difference is product status: TRAB18503 is active while TRA18503 is obsolete. No design modifications are required.

Q: What is the difference between the TRA18503 and TRAB18503?

A: Both parts are manufactured by TE Connectivity Laird and belong to the Phantom® series. The electrical and mechanical parameters are identical. The TRAB18503 is the active production variant, while the TRA18503 is classified as obsolete. The TRAB18503 is recommended for all new procurement and system support.

Q: Why is the TLS.20.1F11 listed as a similar part but not a substitute?

A: The TLS.20.1F11 operates at 460MHz for CDMA applications, whereas the TRA18503 operates at 1.9GHz for GSM and PCS applications. The frequency bands are incompatible. Additionally, the TLS.20.1F11 uses N Type Male termination instead of NMO, and features a whip antenna type instead of dome. These differences prevent functional equivalence.

Q: Are there packaging differences between the TRA18503 and TRAB18503?

A: The TRA18503 is supplied in bulk packaging. The TRAB18503 packaging specification is not provided in the available data. Contact the manufacturer or authorized distributor for specific packaging requirements and availability options.

Q: What compliance certifications apply to the TRAB18503?

A: The TRAB18503 carries RoHS compliance certification and MSL 1 (Unlimited) moisture sensitivity level rating, identical to the TRA18503. Both parts meet environmental and reliability standards for industrial and commercial applications.

Q: Can the TRA18503 be used in new designs?

A: No. The TRA18503 is classified as obsolete. The TRAB18503 is the recommended part for new designs, offering identical performance with active production status and guaranteed availability.