Winchester Interconnect 301666-2 Modular Connector Jack - Equivalent & Substitute Parts

Part Overview

The Winchester Interconnect 301666-2 is an unshielded modular connector jack designed for 6-position 6-contact (6p6c) applications, supporting RJ11, RJ12, RJ14, and RJ25 standards. This through-hole mounted jack features a 90° right-angle orientation with press-fit termination and board lock functionality. The component is currently in active production status with 1107 pieces available in new original inventory. Substitute parts are identified when original stock becomes unavailable, when procurement lead times require alternative sourcing, or when design flexibility permits equivalent connector specifications.

Substiute Parts

301666-2

Winchester InterconnectIn Stock: 1162301666-2 Datasheet

Current PartRFQ

0438146621

MolexIn Stock: 175210438146621 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of modular connector jacks is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Connector type (Jack)
• Contact configuration (6p6c)
• Supported standards (RJ11, RJ12, RJ14, RJ25)
• Orientation (90° right-angle)
• Shielding classification (Unshielded)
• Number of ports (2)
• Number of rows (1)
• Board lock feature presence

Acceptable Variation Parameters:

• Mounting type (Through Hole and Panel Mount are compatible for through-hole applications)
• Termination method (Press-fit and Solder are both acceptable termination technologies)
• Contact finish thickness (both gold-plated finishes meet electrical requirements)
• Housing material composition (both polyester and polyamide glass-filled materials meet mechanical requirements)
• Manufacturer identity

The Molex 0438146621 satisfies all mandatory matching parameters and represents a valid substitute for the Winchester Interconnect 301666-2 in applications where the specified electrical and mechanical characteristics are required.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (Winchester Interconnect 301666-2): Select the Winchester Interconnect 301666-2 when original component specification is required or when press-fit termination is mandated by board design. This part is active in production with established supply availability.

Substitute Selection (Molex 0438146621): The Molex 0438146621 is a valid substitute when the Winchester part becomes unavailable or when solder termination is compatible with assembly processes. Both parts maintain active product status and full regulatory compliance. The Molex part offers higher inventory availability (17453 pieces) and thicker gold contact plating (50.0µin versus 15.0µin), which may provide extended contact life in high-cycle applications. Both parts are RoHS compliant and carry identical ECCN and HTSUS classifications, confirming regulatory equivalence.

The housing material difference (polyester versus polyamide) does not affect electrical or mechanical performance for the specified application parameters. Both materials are glass-filled thermoplastics with equivalent mechanical properties for modular connector applications.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0438146621 be used as a direct replacement for the Winchester 301666-2?

A: Yes. Both connectors share identical electrical specifications (6p6c jack, 90° right-angle, unshielded, RJ11/RJ12/RJ14/RJ25 compatible). The primary difference is termination method: Winchester uses press-fit while Molex uses solder. If your PCB design accommodates solder termination, the Molex part is electrically and mechanically equivalent.

Q: What is the difference in contact finish thickness between these parts?

A: The Winchester 301666-2 has 15.0µin (0.38µm) gold plating, while the Molex 0438146621 has 50.0µin (1.27µm) gold plating. Both thicknesses meet industry standards for modular connector applications. The thicker Molex plating may provide marginally extended contact durability in high-insertion-cycle environments.

Q: Are both parts RoHS compliant?

A: Yes. The Winchester part is RoHS Compliant, and the Molex part is ROHS3 Compliant. Both meet current environmental regulations for electronic component manufacturing.

Q: What is the difference between press-fit and solder termination?

A: Press-fit termination (Winchester) uses mechanical pressure to secure contacts into PCB holes without solder. Solder termination (Molex) requires thermal bonding of contacts to PCB pads. Selection depends on your assembly process capability and PCB design. Both methods provide reliable electrical connections when properly executed.

Q: Can I use the Molex part in a panel mount application?

A: The Molex 0438146621 supports both panel mount and through-hole mounting. The Winchester 301666-2 is specified for through-hole mounting only. If panel mounting is required, the Molex part offers this additional flexibility.

Q: Are the housing materials compatible in terms of mechanical performance?

A: Yes. The Winchester uses polyester glass-filled material while the Molex uses polyamide (nylon) glass-filled material. Both materials provide equivalent mechanical strength and dimensional stability for modular connector applications.

Q: What is the inventory status for each part?

A: Winchester 301666-2 has 1107 pieces in stock. Molex 0438146621 has 17453 pieces in stock. The Molex part offers significantly higher availability for immediate procurement.

Q: Do both parts have board lock features?

A: Yes. Both the Winchester 301666-2 and Molex 0438146621 include board lock functionality to secure the connector to the PCB.