MS3111F12-3S Equivalent & Substitute Parts

Part Overview

The MS3111F12-3S is a 3-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 gold-plated mating contacts. The part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing system maintenance and new procurement requirements.

Substiute Parts

MS3111F12-3S

Amphenol Industrial OperationsIn Stock: 1105MS3111F12-3S Datasheet

Current PartRFQ

MSW01E12-3S-SR

Milspecwest, LLCIn Stock: 756MSW01E12-3S-SR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The MSW01E12-3S-SR qualifies as a functional equivalent based on the following critical parameters:

• Connector Configuration: Both parts are 3-position receptacles with female sockets
• Shell Size: Identical 12-3 shell size and insert specification
• Mounting: Both feature free-hanging, in-line mounting
• Fastening: Bayonet lock mechanism on both parts
• Shell Material: Aluminum construction in both designs
• Temperature Range: Identical operating range of -55°C ~ 125°C
• Series Compliance: MSW01E12-3S-SR conforms to 26482 Style Connectors, maintaining MIL-DTL-26482 compatibility
• Application Domain: Both rated for military applications

The primary difference lies in termination method (solder cup versus solder) and contact finish specifications, which do not preclude substitution in equivalent circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The MSW01E12-3S-SR serves as an active substitute for the discontinued MS3111F12-3S. Both connectors maintain compliance with MIL-DTL-26482 specifications and share identical mechanical and environmental parameters. The substitute part is currently in active production with 720 units in stock, ensuring supply chain continuity.

Both parts carry RoHS non-compliant status, consistent with military-grade connector specifications. The MSW01E12-3S-SR provides documented electrical ratings (13A at 800V), whereas the original part does not specify these parameters in available documentation.

Contact finish differences (gold versus cadmium) and termination method variations (solder cup versus solder) should be evaluated against specific circuit requirements and assembly processes. Mechanical compatibility and environmental resistance remain equivalent across both designs.

Frequently Asked Questions (FAQ)

Q: Can MSW01E12-3S-SR directly replace MS3111F12-3S in existing assemblies?

A: Yes, for mechanical and environmental compatibility. Both connectors share identical shell size (12-3), mounting configuration, fastening mechanism, and operating temperature range. Verify that termination method (solder versus solder cup) and contact finish specifications align with your assembly process and circuit requirements.

Q: What is the significance of the shell size designation 12-3?

A: The 12-3 designation indicates shell size 12 with 3 positions. This specification is critical for physical mating compatibility and must match exactly between connector pairs.

Q: Are both parts suitable for aerospace and military applications?

A: Both connectors are rated for military applications. The MS3111F12-3S explicitly lists aerospace applications. The MSW01E12-3S-SR is designated for military use. Application suitability should be confirmed against specific system requirements and qualification documentation.

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 attachment. Solder termination indicates direct solder connection points. Both methods achieve electrical connection; selection depends on assembly equipment and process specifications.

Q: Why does the substitute part specify electrical ratings while the original does not?

A: Manufacturer documentation practices vary. The MSW01E12-3S-SR provides explicit current (13A) and voltage (800V) ratings. The absence of these specifications in the MS3111F12-3S documentation does not indicate lower capability; it reflects different documentation standards between manufacturers.

Q: Are there inventory considerations for this substitution?

A: The MS3111F12-3S is discontinued with 1011 units available. The MSW01E12-3S-SR is active production with 720 units in stock, providing ongoing supply availability for future requirements.