3910D-70CM-SMA RF Antenna Equivalent & Substitute Parts

Part Overview

The 3910D-70CM-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 an SMA magnetic termination, integrated LNA and filter, and operates across the frequency range of 1.565GHz to 1.585GHz with a gain specification of -2dBic to 3dBic. The unit includes a 700mm cable and provides IP67 ingress protection.

The 3910D-70CM-SMA is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system compatibility, ensure continued availability for new designs, and support legacy system maintenance where original components are no longer in production.

Substiute Parts

3910D-70CM-SMA

PCTEL, Inc.In Stock: 11513910D-70CM-SMA Datasheet

Current PartRFQ

3917D

PCTEL, Inc.In Stock: 8333917D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3910D-70CM-SMA is determined by strict alignment 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 band
• Termination type: SMA (connector interface)
• Ingress protection: IP67
• Mounting type: Magnetic
• Physical height: 0.535" (13.60mm)
• RF family/standard: Navigation
• Frequency group: UHF (1GHz ~ 2GHz)
• Integrated features: LNA and Filter

The 3917D meets all mandatory matching parameters and is classified as an active product with current manufacturing status. This part maintains electrical and mechanical compatibility while offering improved product lifecycle support.

Parameter Comparison

Engineering Selection Recommendations

The 3917D is the direct substitute for the 3910D-70CM-SMA based on electrical and mechanical parameter equivalence. Selection of the 3917D is supported by the following factors:

Product Lifecycle Status: The 3917D maintains active manufacturing status, ensuring continued availability and supply chain reliability. The 3910D-70CM-SMA is obsolete and subject to end-of-life constraints.

Compliance Certification: The 3917D is RoHS Compliant, meeting current environmental and regulatory requirements for electronic components. This compliance status supports integration into modern system designs and procurement workflows.

Electrical Equivalence: Both parts operate at identical center frequency (1.575GHz), frequency range (1.565GHz ~ 1.585GHz), and gain specifications (-2dBic, 3dBic). Electrical performance is equivalent across all specified parameters.

Mechanical Compatibility: Both parts share identical physical dimensions (0.535" maximum height), mounting type (magnetic), ingress protection rating (IP67), and connector interface (SMA). Direct mechanical substitution is supported.

Application Scope: The 3917D extends application support to GNSS in addition to GPS, providing broader compatibility with modern navigation systems while maintaining full GPS functionality.

Cable Configuration Difference: The 3917D includes a 3-meter cable assembly compared to the 700mm cable on the 3910D-70CM-SMA. Cable length selection should be evaluated based on specific installation requirements.

Frequently Asked Questions (FAQ)

Q: What determines whether the 3917D can substitute for the 3910D-70CM-SMA?

A: Substitution is based on matching electrical and mechanical parameters: center frequency (1.575GHz), frequency range (1.565GHz ~ 1.585GHz), antenna type (module), number of bands (1), gain specification (-2dBic, 3dBic), termination type (SMA), ingress protection (IP67), mounting type (magnetic), physical height (0.535"), and integrated features (LNA and filter). The 3917D meets all these criteria.

Q: Are there differences between the 3910D-70CM-SMA and 3917D?

A: The primary differences are: (1) cable length—3910D-70CM-SMA includes 700mm cable; 3917D includes 3-meter cable; (2) product status—3910D-70CM-SMA is obsolete; 3917D is active; (3) compliance—3917D is RoHS Compliant; (4) application scope—3917D supports both GNSS and GPS, while 3910D-70CM-SMA is specified for GPS. Electrical and mechanical parameters are equivalent.

Q: Does the cable length difference affect electrical performance?

A: Cable length is a mechanical and installation parameter, not an electrical performance parameter. Both parts maintain identical electrical specifications. Cable length selection depends on physical installation geometry and system layout requirements.

Q: Is the 3917D compatible with systems designed for the 3910D-70CM-SMA?

A: Yes. The 3917D is electrically and mechanically equivalent across all specified parameters. SMA connector compatibility is maintained. System integration requires evaluation of cable length requirements for the specific installation.

Q: What is the significance of RoHS Compliance on the 3917D?

A: RoHS Compliance indicates the 3917D meets Restriction of Hazardous Substances regulations, restricting lead, cadmium, mercury, and other hazardous materials. This certification supports compliance with current environmental regulations and is required for many modern procurement and system integration workflows.

Q: Can the 3910D-70CM-SMA still be used in new designs?

A: The 3910D-70CM-SMA is classified as obsolete. New designs should specify the 3917D to ensure long-term component availability, supply chain continuity, and compliance with current regulatory requirements.

Q: Are there any frequency or gain differences between these parts?

A: No. Both parts operate at 1.575GHz center frequency across the 1.565GHz ~ 1.585GHz range with identical gain specifications of -2dBic and 3dBic. Frequency and gain performance are equivalent.