RJ11-4L-S Modular Connector Equivalent & Substitute Parts

Part Overview

The RJ11-4L-S is a modular jack connector manufactured by TE Connectivity Corcom Filters, designed for 6-position 4-contact (6p4c) applications conforming to RJ11 and RJ14 standards. This connector features a 90° right-angle orientation with through-hole solder termination and unshielded construction. The product is classified as obsolete, necessitating identification of equivalent substitute components for ongoing procurement and design requirements.

Substiute Parts

RJ11-4L-S

TE Connectivity Corcom FiltersIn Stock: 919RJ11-4L-S Datasheet

Current PartRFQ

88400-064LF

Amphenol ICC (FCI)In Stock: 212688400-064LF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RJ11-4L-S is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Connector type (Jack)
• Contact configuration (6p4c RJ11/RJ14)
• Orientation (90° right-angle)
• Mounting method (through-hole)
• Termination type (solder)
• Shielding classification (unshielded)
• Contact material (phosphor bronze)
• Contact finish (gold)
• Tab direction (down)
• Port and row configuration (1 port, 1 row)

The substitute part 88400-064LF satisfies all mandatory matching parameters, establishing direct functional equivalence for applications requiring RJ11-4L-S replacement.

Parameter Comparison

Engineering Selection Recommendations

The 88400-064LF modular connector from Amphenol ICC (FCI) provides functional equivalence to the obsolete RJ11-4L-S across all critical electrical and mechanical parameters. Both components are classified as end-of-life products (RJ11-4L-S is obsolete; 88400-064LF is last-time-buy), indicating limited future availability.

The 88400-064LF offers the following advantages for new designs or ongoing production:

• RoHS compliance certification, meeting current regulatory requirements
• Specified operating temperature range (-40°C to 70°C), providing defined thermal performance
• Cat3 rating specification for telecommunications applications
• Documented moisture sensitivity level (MSL 1), enabling proper handling protocols

Minor differences exist in contact finish thickness (50.0µin versus 5.00µin) and housing material composition (polyester glass-filled versus polyamide nylon FR50). These differences do not affect functional compatibility for standard RJ11/RJ14 applications, as both materials and finishes meet the electrical and mechanical requirements for modular jack connectors in this category.

Frequently Asked Questions (FAQ)

Q: Can the 88400-064LF directly replace the RJ11-4L-S in existing designs?

A: Yes. The 88400-064LF matches all critical parameters: 6p4c contact configuration, 90° right-angle orientation, through-hole solder termination, unshielded construction, phosphor bronze contacts with gold finish, and down-facing tab direction. Physical and electrical compatibility is established.

Q: What is the significance of the contact finish thickness difference?

A: The RJ11-4L-S specifies 50.0µin (1.27µm) gold finish thickness, while the 88400-064LF specifies 5.00µin (0.127µm). Both thicknesses provide adequate corrosion resistance and electrical conductivity for modular connector applications. The difference reflects manufacturing process variations between manufacturers and does not impact functional performance in standard telecommunications or data applications.

Q: Why do the housing materials differ between these parts?

A: The RJ11-4L-S uses polyester glass-filled material, while the 88400-064LF uses polyamide (PA FR50) nylon FR50. Both materials provide adequate mechanical strength, dimensional stability, and flame resistance for modular connector housings. The material difference reflects different manufacturing approaches by TE Connectivity and Amphenol ICC and does not affect connector performance in standard applications.

Q: What does "Last Time Buy" status mean for the 88400-064LF?

A: Last Time Buy indicates that Amphenol ICC has announced final production of this component. Existing inventory may be available, but no future manufacturing is planned. For long-term production requirements, alternative sources or next-generation connector designs should be evaluated.

Q: Are there any compliance differences between these parts?

A: The 88400-064LF is RoHS compliant with specified operating temperature range (-40°C to 70°C) and MSL 1 rating. The RJ11-4L-S does not provide these specifications in the available documentation. The 88400-064LF is suitable for applications requiring RoHS compliance and defined environmental performance parameters.

Q: What is the packaging difference?

A: The RJ11-4L-S packaging is not specified in available documentation. The 88400-064LF is supplied in tube packaging. Packaging format may affect handling, storage, and integration into assembly processes.

Q: Can these connectors be used interchangeably in Cat3 telecommunications applications?

A: The 88400-064LF is explicitly rated for Cat3 applications. The RJ11-4L-S does not specify a Cat rating. Both connectors are mechanically and electrically compatible with standard RJ11 and RJ14 telecommunications interfaces. For applications requiring Cat3 certification, the 88400-064LF provides documented compliance.