MS3111F8-4S Equivalent & Substitute Parts

Part Overview

The MS3111F8-4S is a 4-position circular connector receptacle manufactured by ITT Cannon, LLC, designed for cable-mounted applications with solder cup termination. This connector features bayonet locking, female sockets, and is rated for 7.5A at 600VAC/850VDC with operating temperature range of -55°C to 125°C. The part is currently active in production with 1005 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when procurement requirements necessitate qualified alternatives meeting equivalent electrical and mechanical specifications.

Substiute Parts

MS3111F8-4S

ITT Cannon, LLCIn Stock: 1050MS3111F8-4S Datasheet

Current PartRFQ

MSW01E8-4S-SR

Milspecwest, LLCIn Stock: 815MSW01E8-4S-SR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MS3111F8-4S is determined by strict equivalence across the following critical parameters:

• Connector Configuration: Receptacle type with female sockets, 4-position capacity
• Shell Size: 8-4 insert designation for mechanical compatibility
• Mounting Architecture: Free hanging in-line cable mount configuration
• Electrical Performance: Minimum 7.5A current rating and voltage capability of 600VAC or higher
• Termination Method: Solder-based connection technology
• Mechanical Interface: Bayonet lock fastening system
• Environmental Compliance: Environment resistant classification
• Operational Range: -55°C to 125°C temperature specification

The substitute part MSW01E8-4S-SR meets all critical parameters within the allowed tolerance band for this connector category. Both parts share identical position count, shell size, mounting type, fastening mechanism, and thermal operating range. Electrical ratings are equivalent or exceed the primary part specification.

Parameter Comparison

Engineering Selection Recommendations

Both MS3111F8-4S and MSW01E8-4S-SR are active production parts with equivalent mechanical and electrical specifications. Selection between these parts should be based on the following factors:

Contact Finish Consideration: The MS3111F8-4S features gold mating contact finish, while MSW01E8-4S-SR uses cadmium finish. Gold plating provides superior corrosion resistance and lower contact resistance in low-signal applications. Cadmium finish is suitable for general-purpose military and industrial applications where cost optimization is prioritized.

Compliance Status: Both parts are RoHS non-compliant, reflecting their military-grade specification and cadmium-based finishes. Neither part carries REACH compliance documentation, consistent with military connector standards.

Packaging and Inventory: MS3111F8-4S is available in higher quantity (1005 units) with standard packaging. MSW01E8-4S-SR is packaged in bags with 744 units in stock. Packaging format should be evaluated against assembly and handling requirements.

Series Designation: MS3111F8-4S belongs to the KPT series (ITT Cannon standard), while MSW01E8-4S-SR is classified as 26482 Style Connectors (Milspecwest equivalent). Both series are mechanically and electrically interchangeable for the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can MSW01E8-4S-SR be used as a direct replacement for MS3111F8-4S in all applications?

A: MSW01E8-4S-SR is mechanically and electrically compatible for applications where contact finish material does not impact performance. The cadmium finish on MSW01E8-4S-SR is suitable for standard military and industrial environments. If gold contact finish is a design requirement for signal integrity or corrosion resistance in specific environments, MS3111F8-4S should be retained.

Q: What is the significance of the shell size designation 8-4?

A: The 8-4 designation indicates shell size 8 with 4-position insert capacity. This is a standardized MIL specification identifier that ensures mechanical compatibility between receptacle and plug connectors. Both substitute parts maintain this designation for mating compatibility.

Q: Are there differences in solder cup versus solder termination?

A: Both termination methods are solder-based connection technologies. Solder cup and solder termination are functionally equivalent for cable attachment purposes. The terminology difference reflects manufacturer documentation conventions rather than functional distinction.

Q: What environmental conditions are these connectors rated for?

A: Both connectors are rated for -55°C to 125°C operating temperature range and carry environment resistant classification. This specification supports military and aerospace applications in temperature-variable environments. Specific environmental exposure (humidity, salt spray, vibration) should be verified against application requirements.

Q: How does the 7.5A current rating apply to multi-position connectors?

A: The 7.5A rating represents the maximum current per individual contact. In a 4-position connector, total system current capacity depends on circuit design and contact allocation. Verify that individual circuit current does not exceed 7.5A per contact.

Q: What is the difference between bayonet lock and other fastening types?

A: Bayonet lock provides quick-connect/quick-disconnect capability through rotational engagement. Both substitute parts use identical bayonet locking mechanisms, ensuring equivalent mating reliability and repeatability across connection cycles.