33-HC975-28 Equivalent & Substitute Parts

Part Overview

The 33-HC975-28 is a triple band helical RF antenna manufactured by Tallysman Wireless Inc., designed for multi-constellation GNSS and cellular applications. This antenna operates across Beidou, Galileo, GLONASS, GPS, and LTE frequency bands with a center frequency of 1.202 GHz and 1.5655 GHz, delivering 28 dB gain through an SMA male connector mount. The product is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

33-HC975-28

Tallysman Wireless Inc.In Stock: 110233-HC975-28 Datasheet

Current PartRFQ

33-HC882-28

Tallysman Wireless Inc.In Stock: 108233-HC882-28 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 33-HC975-28 is determined by the following critical parameters:

• Antenna Type: Helical construction required for RF performance consistency
• Termination: SMA Male connector for mechanical and electrical compatibility
• Gain: 28 dB specification for signal reception performance
• VSWR: 1.8 maximum for impedance matching
• Frequency Coverage: Overlap within L-band (1.164 GHz ~ 1.606 GHz) for GNSS and LTE applications
• Mounting Type: Connector mount configuration
• Physical Dimensions: Height maximum 2.457" (62.40 mm) for form factor compatibility
• Ingress Protection: IP67 rating for environmental sealing
• Compliance: ROHS3 and MSL 1 for regulatory and handling requirements

The 33-HC882-28 qualifies as a substitute based on matching all critical parameters within the allowed electrical and mechanical specifications for this product category.

Parameter Comparison

Engineering Selection Recommendations

The 33-HC882-28 is the qualified substitute for the obsolete 33-HC975-28. Both parts maintain identical electrical performance specifications (28 dB gain, 1.8 VSWR) and mechanical compatibility (SMA Male termination, IP67 ingress protection, identical physical height). The primary distinction is product status: the 33-HC882-28 is currently active in production, ensuring long-term availability and supply chain continuity.

Both parts satisfy ROHS3 compliance and MSL 1 requirements, supporting equivalent handling and environmental performance. The frequency range overlap across L-band (1.525 GHz ~ 1.606 GHz) and the primary GNSS band (1.189 GHz ~ 1.254 GHz for 33-HC882-28 versus 1.164 GHz ~ 1.24 GHz for 33-HC975-28) provides functional equivalence for Beidou, Galileo, GLONASS, GPS, and LTE applications.

Frequently Asked Questions (FAQ)

Q: Can the 33-HC882-28 directly replace the 33-HC975-28 in existing designs?

A: Yes. Both antennas share identical SMA Male termination, connector mount configuration, physical dimensions (2.457" maximum height), and electrical specifications (28 dB gain, 1.8 VSWR). The frequency ranges overlap across all critical L-band and GNSS operating bands required for Beidou, Galileo, GLONASS, GPS, and LTE applications.

Q: What is the primary difference between these two parts?

A: The 33-HC882-28 is currently active in production, while the 33-HC975-28 is obsolete. The center frequency for the primary GNSS band differs slightly (1.2215 GHz versus 1.202 GHz), but both operate within compatible frequency ranges for multi-constellation GNSS reception.

Q: Are there any compliance or environmental differences?

A: No. Both parts are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level) ratings. Both maintain IP67 ingress protection for equivalent environmental sealing performance.

Q: What packaging is available for the 33-HC882-28?

A: The 33-HC882-28 is supplied in bulk packaging, compared to the original part's standard packaging designation.

Q: Are both parts suitable for the same applications?

A: Yes. Both antennas support identical applications: Beidou, Galileo, GLONASS, GPS, and LTE. The helical antenna type and dual-band configuration provide equivalent RF performance across these navigation and cellular standards.