SL403M Equivalent & Substitute Parts

Part Overview

The SL403M is a 3-position circular connector plug with male pins and solder cup termination, manufactured by Switchcraft Inc. as part of the Slim-Line® SL40 series. This connector is designed for audio, industrial, marine, and medical applications requiring shielded connections with a 5A current rating. The SL403M is classified as obsolete, making identification of active equivalent parts essential for ongoing procurement and system maintenance.

Substiute Parts

SL403M

Switchcraft Inc.In Stock: 1060SL403M Datasheet

Current PartRFQ

SL403MX

Switchcraft Inc.In Stock: 855SL403MX Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SL403M is determined by strict equivalence across the following critical parameters:

• Connector type and pin configuration (Plug, Male Pins, 3-position)
• Shell size and insert designation (SL-3M)
• Termination method (Solder Cup)
• Mechanical fastening (Threaded coupling nut)
• Electrical performance (5A current rating, shielded design)
• Material specifications (Copper alloy shell, nickel finish, silver contact finish)
• Physical dimensions (0.280" cable opening)
• Flammability compliance (UL94 V-0)

The SL403MX meets all these criteria and is classified as an active product, making it a direct functional equivalent to the obsolete SL403M.

Parameter Comparison

Engineering Selection Recommendations

The SL403MX is the direct equivalent for the obsolete SL403M. Both parts share identical electrical and mechanical specifications, including connector configuration, termination method, current rating, and material composition. The primary distinction is product status: SL403M is obsolete while SL403MX is active and available for procurement.

An additional consideration is regulatory compliance. The SL403MX achieves ROHS3 compliance, whereas the SL403M is RoHS non-compliant. For applications subject to RoHS requirements, the SL403MX is the appropriate selection. For legacy systems or applications without RoHS mandates, both parts are functionally interchangeable based on the provided specifications.

Frequently Asked Questions (FAQ)

Q: Can SL403MX be used as a direct replacement for SL403M?

A: Yes. The SL403MX is functionally equivalent to the SL403M across all critical parameters: connector type, pin configuration, shell size, termination method, current rating, and material specifications. Both are 3-position male plug connectors with solder cup termination and identical mechanical and electrical performance.

Q: What is the primary reason to transition from SL403M to SL403MX?

A: The SL403M is obsolete. The SL403MX is the active equivalent part from the same manufacturer and series, ensuring continued availability and supply chain reliability.

Q: Are there compliance differences between these parts?

A: Yes. The SL403MX is ROHS3 compliant, while the SL403M is RoHS non-compliant. For applications requiring RoHS compliance, the SL403MX is the required selection.

Q: Do packaging differences affect compatibility?

A: No. The SL403M is supplied in standard packaging, while the SL403MX is supplied in bulk packaging. Packaging format does not affect electrical or mechanical compatibility. Selection should be based on procurement quantity requirements.

Q: Are the solder cup terminations identical?

A: Yes. Both parts feature solder cup termination with identical cable opening dimensions (0.280" / 7.10mm) and the same strain relief, cable clamp, and coupling nut features.

Q: Can these connectors be used interchangeably in existing assemblies?

A: Yes. The SL403MX maintains the same shell size (SL-3M), fastening type (threaded), and all mechanical dimensions as the SL403M, enabling direct substitution in existing designs without modification.