MS3111E18-11S Equivalent & Substitute Parts

Part Overview

The MS3111E18-11S is an 11-position circular connector receptacle manufactured by Amphenol Industrial Operations, designed for military and aerospace applications. This connector features female sockets with solder cup termination, bayonet lock fastening, and operates across the temperature range of -55°C to 125°C. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing procurement and system maintenance.

Substiute Parts

MS3111E18-11S

Amphenol Industrial OperationsIn Stock: 1046MS3111E18-11S Datasheet

Current PartRFQ

MSW01E18-11S

Milspecwest, LLCIn Stock: 1025MSW01E18-11S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The MSW01E18-11S qualifies as a functional equivalent based on the following critical parameters:

• Connector Configuration: Both parts are 11-position receptacles with female sockets
• Shell Size: Identical 18-11 shell size and insert configuration
• Fastening Mechanism: Both use bayonet lock fastening
• Mounting Style: Both are free hanging (in-line) connectors
• Shell Material: Both feature aluminum construction
• Operating Temperature Range: Both operate from -55°C to 125°C
• Series Compliance: MSW01E18-11S is a 26482 Style Connector, maintaining MIL-DTL-26482 compatibility
• Environmental Rating: Both provide environment resistant ingress protection

The primary difference lies in termination method: the MS3111E18-11S uses solder cup termination, while the MSW01E18-11S uses solder termination. Both are solder-based connection methods suitable for equivalent applications.

Parameter Comparison

Engineering Selection Recommendations

The MSW01E18-11S serves as an active substitute for the discontinued MS3111E18-11S. Both connectors maintain MIL-DTL-26482 compatibility and share identical mechanical and electrical interface specifications for the 11-position, 18-11 shell size configuration.

Key considerations for selection:

• Availability: The MSW01E18-11S is currently active in production, whereas the MS3111E18-11S is discontinued
• Contact Finish: The MS3111E18-11S features gold mating contacts, while the MSW01E18-11S uses cadmium. Gold contacts provide superior corrosion resistance and lower contact resistance
• Shell Finish: The MS3111E18-11S includes olive drab chromate over cadmium finish; the MSW01E18-11S uses cadmium finish
• Compliance: The MSW01E18-11S is RoHS non-compliant, which may impact applications requiring RoHS certification
• Electrical Ratings: The MSW01E18-11S provides specified current (13A) and voltage (800V) ratings

Selection should be based on application requirements regarding contact finish, environmental specifications, and regulatory compliance needs.

Frequently Asked Questions (FAQ)

Q: Can the MSW01E18-11S directly replace the MS3111E18-11S in existing assemblies?

A: Both connectors share identical shell size (18-11), position count (11), fastening mechanism (bayonet lock), and mounting style (free hanging). The mechanical interface is compatible. Termination methods differ (solder cup versus solder), requiring verification of PCB or cable assembly design compatibility.

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

A: The MS3111E18-11S uses gold mating contacts, which provide superior corrosion resistance and lower contact resistance compared to the cadmium contacts on the MSW01E18-11S. Gold contacts are preferred in high-reliability military and aerospace applications.

Q: Are both connectors suitable for the same operating temperature range?

A: Yes. Both the MS3111E18-11S and MSW01E18-11S operate across -55°C to 125°C, making them functionally equivalent for temperature-dependent applications.

Q: What does "MIL-DTL-26482 Series I" compatibility mean?

A: This indicates compliance with military specification MIL-DTL-26482 for circular connectors. The MSW01E18-11S is identified as a 26482 Style Connector, maintaining this standard compatibility for military and aerospace applications.

Q: Does the RoHS non-compliance of the MSW01E18-11S affect substitution?

A: RoHS compliance depends on application requirements. If the system or end-use market requires RoHS certification, the MSW01E18-11S may not be suitable. The MS3111E18-11S RoHS status was not specified in available data.

Q: What is the difference between solder cup and solder termination?

A: Solder cup termination features a cup-shaped contact designed for wire insertion and solder connection. Solder termination refers to direct solder connection points. Both are solder-based methods; assembly procedure and PCB pad design differ between the two approaches.