SL404F Equivalent & Substitute Parts

Part Overview

The SL404F is a 4-position circular connector plug with female sockets and solder eyelet 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, threaded circular connections with cable strain relief.

The SL404F carries an obsolete product status. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications currently utilizing this connector.

Substiute Parts

SL404F

Switchcraft Inc.In Stock: 774SL404F Datasheet

Current PartRFQ

SL404FX

Switchcraft Inc.In Stock: 1124SL404FX Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL404F is determined by strict equivalence across the following critical parameters:

• Connector type and gender (Plug, Female Sockets)
• Position count (4 positions)
• Shell size designation (SL-4F)
• Termination method (Solder Eyelet)
• Fastening mechanism (Threaded)
• Shielding configuration (Shielded)
• Current capacity (5A)
• Cable opening diameter (0.280" / 7.10mm)
• Material and finish specifications (Copper Alloy, Nickel shell, Silver contact finish)

The SL404FX meets all these criteria and is classified as a direct substitute for the obsolete SL404F.

Parameter Comparison

Engineering Selection Recommendations

The SL404FX is the direct equivalent substitute for the SL404F. All electrical, mechanical, and dimensional parameters are identical. The primary distinction is product lifecycle status: the SL404F is obsolete, while the SL404FX is active and in production.

The SL404FX provides an additional compliance advantage: it meets ROHS3 requirements, whereas the SL404F is non-compliant. For new designs or applications subject to RoHS regulations, the SL404FX is the appropriate selection. For legacy system maintenance where RoHS compliance is not mandated, both parts are functionally interchangeable.

Frequently Asked Questions (FAQ)

Q: Can the SL404FX be used as a direct replacement for the SL404F?

A: Yes. The SL404FX is electrically and mechanically identical to the SL404F across all specified parameters, including connector type, position count, shell size, termination method, current rating, and mechanical features.

Q: What is the primary reason to substitute the SL404F with the SL404FX?

A: The SL404F is obsolete and no longer in production. The SL404FX is the active equivalent from the same manufacturer, ensuring continued supply availability and design continuity.

Q: Are there packaging differences between the SL404F and SL404FX?

A: The SL404F is supplied in standard packaging, while the SL404FX is supplied in bulk packaging. This difference does not affect connector performance or compatibility.

Q: Does the SL404FX meet RoHS compliance?

A: Yes. The SL404FX is ROHS3 compliant. The SL404F is RoHS non-compliant. Applications subject to RoHS regulations should specify the SL404FX.

Q: Are the solder eyelet terminations identical between both parts?

A: Yes. Both the SL404F and SL404FX use solder eyelet termination with identical specifications, allowing direct substitution in PCB assembly processes.

Q: What applications are these connectors suitable for?

A: Both connectors are specified for audio, industrial, marine, and medical applications requiring shielded 4-position circular connections with threaded fastening and strain relief.