3971D-HR-W Equivalent & Substitute Parts

Part Overview

The 3971D-HR-W is an RF antenna manufactured by PCTEL, Inc., designed for GPS applications with high directivity and low noise characteristics. This component is classified as obsolete, indicating it is no longer in active production. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for system redesign, maintenance, and procurement planning. The substitute part identified maintains compatibility with the original electrical and mechanical specifications while offering active product status and improved availability.

Substiute Parts

3971D-HR-W

PCTEL, Inc.In Stock: 7683971D-HR-W Datasheet

Current PartRFQ

8171D-HR

PCTEL, Inc.In Stock: 8328171D-HR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 8171D-HR is identified as the manufacturer-recommended substitute for the 3971D-HR-W. This substitution is based on the following alignment criteria:

• Manufacturer Consistency: Both parts are manufactured by PCTEL, Inc., ensuring design continuity and support consistency
• Regulatory Compliance: Both parts share identical ECCN (7A994) and HTSUS (8529.10.4040) classifications, confirming equivalent export control and tariff treatment
• Application Domain: Both are RF antennas designed for GNSS/GPS applications, maintaining functional equivalence in navigation systems
• RoHS Compliance: The substitute maintains ROHS3 compliance, ensuring environmental and regulatory alignment
• Termination Compatibility: Both utilize TNC connectors, supporting direct mechanical and electrical integration into existing designs

Parameter Comparison

Engineering Selection Recommendations

For New Designs: The 8171D-HR is the appropriate selection. This part carries active product status, ensuring long-term availability, manufacturer support, and continued compliance with evolving regulatory standards. Active status guarantees access to technical documentation, design support, and supply chain stability.

For Legacy System Maintenance: The 3971D-HR-W remains available in inventory (745 units) for systems requiring exact original component matching. However, transition planning to the 8171D-HR is recommended to mitigate future obsolescence risk and supply chain constraints.

Regulatory and Compliance Alignment: Both parts maintain identical ECCN and HTSUS classifications, eliminating export control or tariff complications during substitution. ROHS3 compliance is maintained across both options, supporting environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 8171D-HR directly replace the 3971D-HR-W in existing assemblies?

A: Yes. Both parts are manufactured by PCTEL, Inc., share identical regulatory classifications (ECCN 7A994, HTSUS 8529.10.4040), and are designed for GNSS/GPS applications. The TNC Female termination on the 8171D-HR supports direct mechanical and electrical integration. Physical dimensions (0.827" maximum height) and IP67 ingress protection are suitable for standard RF antenna mounting configurations.

Q: Why is the 3971D-HR-W classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by PCTEL, Inc. This classification typically reflects product lifecycle management decisions, technology advancement, or market consolidation. The 8171D-HR represents the current active equivalent within PCTEL's product portfolio.

Q: Are there any compliance differences between the two parts?

A: No. Both parts maintain ROHS3 compliance and share identical export control (ECCN 7A994) and tariff (HTSUS 8529.10.4040) classifications. Substitution does not introduce compliance complications.

Q: What is the packaging difference between these parts?

A: The 3971D-HR-W packaging specification is not provided in the technical data. The 8171D-HR is supplied in Box packaging. Confirm packaging requirements with your procurement or assembly team to ensure compatibility with receiving and handling procedures.

Q: How should I verify compatibility before implementing the 8171D-HR as a substitute?

A: Confirm the following with your system design documentation: (1) TNC Female connector compatibility with your RF interface, (2) Through Hole mounting compatibility with your PCB or mechanical assembly, (3) Maximum height of 21.00mm (0.827") fits your spatial constraints, and (4) IP67 ingress protection meets your environmental requirements. Cross-reference these specifications with your original design documentation for the 3971D-HR-W.