Greenlee Communications 45758 Modular Connector - Equivalent & Substitute Parts

Part Overview

The Greenlee Communications 45758 is an 8-position 8-contact (8P8C) unshielded modular plug connector designed for round cable with solid wires. This connector implements the RJ45 Ethernet standard with crimp termination and features gold-plated contacts in a translucent clear housing. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and component procurement.

Substiute Parts

45758

Greenlee CommunicationsIn Stock: 120345758 Datasheet

Current PartRFQ

TM20P-88P

Hirose Electric Co LtdIn Stock: 728TM20P-88P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Greenlee Communications 45758 is based on the following critical parameters that must align between the original and substitute component:

Primary Compatibility Criteria:

• Connector type must be Plug
• Contact configuration must be 8P8C (RJ45, Ethernet)
• Shielding must be Unshielded
• Cable type must support Round Cable with Solid Wires
• Contact finish must be Gold
• Housing color must be Translucent - Clear
• Moisture Sensitivity Level must be 1 (Unlimited)

The Hirose Electric Co Ltd TM20P-88P satisfies all primary compatibility criteria. While the termination method differs (IDC versus Crimp), both methods achieve electrical and mechanical connection to 8P8C modular connectors and are functionally equivalent for this connector category. The TM20P-88P maintains active product status and RoHS compliance, providing superior long-term availability compared to the obsolete original part.

Parameter Comparison

Engineering Selection Recommendations

The Hirose Electric Co Ltd TM20P-88P is the designated substitute for the obsolete Greenlee Communications 45758. Selection of this substitute is based on the following engineering factors:

Product Status Consideration: The original Greenlee 45758 is obsolete, creating supply chain risk. The Hirose TM20P-88P maintains active product status with 634 units in current inventory, ensuring availability for ongoing procurement.

Compliance and Certification: The Hirose TM20P-88P is RoHS Compliant, meeting current regulatory requirements for electronic components in regulated markets. The original part lists RoHS status as not applicable, indicating it predates RoHS requirements.

Functional Equivalence: Both connectors implement the 8P8C (RJ45, Ethernet) standard with identical contact configuration, shielding, cable type compatibility, and contact finish specifications. The difference in termination method (IDC versus Crimp) does not affect functional compatibility within the 8P8C modular connector category, as both achieve equivalent electrical and mechanical performance.

Electrical Ratings: The Hirose substitute provides specified electrical ratings (30V, 500 mA) that support standard Ethernet applications. These ratings are appropriate for the RJ45 Ethernet connector category.

Frequently Asked Questions (FAQ)

Q: Why is the Greenlee 45758 listed as obsolete?

A: The Greenlee 45758 has reached end-of-life status in the manufacturer's product portfolio. While 1103 units remain in current inventory, no new production is scheduled. The Hirose TM20P-88P is an active product with ongoing manufacturing support.

Q: Can the Hirose TM20P-88P directly replace the Greenlee 45758?

A: Yes. Both connectors meet the 8P8C (RJ45, Ethernet) standard with identical contact configuration, unshielded design, gold contact finish, and translucent clear housing. The connectors are mechanically and electrically compatible for round cable with solid wires.

Q: What is the difference between crimp and IDC termination methods?

A: Crimp termination (Greenlee 45758) requires a separate crimping tool to attach contacts to individual wires. IDC termination (Hirose TM20P-88P) uses insulation displacement contacts that pierce wire insulation when the connector is assembled. Both methods achieve equivalent electrical connection and are standard in the 8P8C modular connector category.

Q: Does the Hirose TM20P-88P require different tooling than the Greenlee 45758?

A: Yes. The Greenlee 45758 requires crimp tooling appropriate for individual contact crimping. The Hirose TM20P-88P uses IDC termination and requires IDC assembly tooling. Verify that your assembly process or supplier supports IDC termination before selecting this substitute.

Q: Are there any environmental or compliance differences between these connectors?

A: The Hirose TM20P-88P is RoHS Compliant, meeting current environmental regulations. The Greenlee 45758 predates RoHS requirements. Both connectors have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: What is the packaging difference between these parts?

A: The Greenlee 45758 is supplied in unspecified packaging. The Hirose TM20P-88P is supplied in Bulk packaging. Confirm bulk packaging meets your procurement and inventory management requirements.

Q: Can I use the Hirose TM20P-88P in existing assemblies designed for the Greenlee 45758?

A: The connectors are mechanically and electrically compatible for mating with standard 8P8C (RJ45, Ethernet) jacks. However, if your assembly process is optimized for crimp termination, you must adapt to IDC termination methods or source alternative crimp-based 8P8C connectors.