3910D-30CM-SMA GPS Magnetic Antenna Equivalent & Substitute Parts

Part Overview

The 3910D-30CM-SMA is a 1.575GHz GPS module RF antenna manufactured by PCTEL, Inc., designed for navigation applications within the UHF frequency band (1GHz ~ 2GHz). This antenna features a 300mm cable, integrated LNA and filter, SMA termination, magnetic mounting, and IP67 ingress protection. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain system compatibility and ensure continued availability for new designs and field replacements.

Substiute Parts

3910D-30CM-SMA

PCTEL, Inc.In Stock: 9173910D-30CM-SMA Datasheet

Current PartRFQ

3917D

PCTEL, Inc.In Stock: 8333917D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3910D-30CM-SMA is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency (Center/Band): 1.575GHz
• Frequency Range: 1.565GHz ~ 1.585GHz
• Antenna Type: Module
• Number of Bands: 1
• Termination: SMA (connector type)
• Mounting Type: Magnetic
• Ingress Protection: IP67
• Height (Max): 0.535" (13.60mm)
• RF Family/Standard: Navigation
• Frequency Group: UHF (1GHz ~ 2GHz)
• Gain: -2dBic, 3dBic
• Features: Cable, LNA, Filter

The 3917D meets all mandatory matching parameters and is classified as an active product, making it a direct functional equivalent for the obsolete 3910D-30CM-SMA. The primary difference is cable length: the 3910D-30CM-SMA includes a 300mm cable, while the 3917D includes a 3m cable. Both parts maintain identical electrical performance, mechanical dimensions, and environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

The 3917D is the direct substitute for the 3910D-30CM-SMA based on electrical and mechanical equivalence. Selection of the 3917D is supported by the following factors:

Product Status: The 3917D is classified as active, ensuring ongoing availability and manufacturing support, whereas the 3910D-30CM-SMA is obsolete and subject to discontinuation.

Compliance: The 3917D is RoHS compliant, meeting current environmental and regulatory standards for electronic components.

Electrical Equivalence: Both parts operate at identical center frequency (1.575GHz), frequency range (1.565GHz ~ 1.585GHz), and gain specifications (-2dBic, 3dBic).

Mechanical Compatibility: Both parts share identical physical dimensions (0.535" maximum height), mounting type (magnetic), and environmental protection rating (IP67).

Cable Length Consideration: The 3917D provides a 3m cable compared to the 3910D-30CM-SMA's 300mm cable. System integration must account for this difference in cable length during installation and layout planning.

Frequently Asked Questions (FAQ)

Q: Can the 3917D directly replace the 3910D-30CM-SMA in existing GPS applications?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters: center frequency, frequency range, gain, antenna type, termination, mounting type, and environmental protection. The primary difference is cable length (3m versus 300mm), which must be accommodated in the system design.

Q: What is the significance of the cable length difference between these parts?

A: The 3910D-30CM-SMA includes a 300mm cable, while the 3917D includes a 3m cable. Cable length affects system layout and installation routing. The longer cable of the 3917D provides greater flexibility in antenna placement relative to the receiver module but requires additional space management in compact designs.

Q: Are the SMA terminations identical between the two parts?

A: Both parts use SMA termination. The 3917D is explicitly specified as SMA Male, ensuring direct connector compatibility with standard SMA female receptacles used in GPS receiver modules.

Q: Why is the 3910D-30CM-SMA classified as obsolete?

A: Product obsolescence is determined by the manufacturer and reflects discontinuation of production. The 3917D, as an active product from the same manufacturer with equivalent specifications, serves as the current production alternative.

Q: Does the 3917D support both GPS and GNSS applications?

A: Yes. The 3917D is specified for both GNSS and GPS applications, providing broader application compatibility than the 3910D-30CM-SMA, which is specified for GPS only. Both parts operate at the same 1.575GHz center frequency used by GPS and compatible GNSS systems.

Q: What is the RoHS compliance status of the 3910D-30CM-SMA?

A: RoHS compliance status for the 3910D-30CM-SMA is not specified in the available documentation. The 3917D is confirmed RoHS compliant, meeting current environmental standards for electronic components.

Q: Are there any differences in the integrated LNA and filter between these parts?

A: Both parts include integrated LNA and filter functionality. No performance differences are specified between the two implementations.