SL403F Equivalent & Substitute Parts

Part Overview

The SL403F is a 3-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 SL403F carries an obsolete product status. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications currently utilizing this connector.

Substiute Parts

SL403F

Switchcraft Inc.In Stock: 953SL403F Datasheet

Current PartRFQ

SL403FX

Switchcraft Inc.In Stock: 1078SL403FX Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL403F is determined by strict equivalence across the following critical parameters:

• Connector type (Plug, Female Sockets)
• Number of positions (3)
• Shell size and insert designation (SL-3F)
• Termination method (Solder Eyelet)
• Fastening mechanism (Threaded)
• Orientation (B)
• Shell and contact materials (Copper Alloy, Nickel, Silver)
• Shielding configuration (Shielded)
• Current rating (5A)
• Cable opening dimension (0.280" / 7.10mm)
• Mechanical features (Cable Clamp, Coupling Nut, Strain Relief)

The SL403FX meets all these criteria and qualifies as a direct substitute for the obsolete SL403F.

Parameter Comparison

Engineering Selection Recommendations

The SL403FX is the direct equivalent substitute for the SL403F. Both parts are manufactured by Switchcraft Inc. and maintain identical mechanical and electrical specifications across all critical parameters.

The primary distinction between the two parts is product status and regulatory compliance. The SL403F is obsolete, while the SL403FX maintains active production status. Additionally, the SL403FX achieves ROHS3 compliance, whereas the SL403F is RoHS non-compliant. For new designs or ongoing production requiring regulatory alignment with current environmental standards, the SL403FX is the appropriate selection.

Both parts share identical connector geometry, termination method, current rating, and mechanical features, ensuring direct interchangeability in existing applications.

Frequently Asked Questions (FAQ)

Q: Can the SL403FX be used as a direct replacement for the SL403F?

A: Yes. The SL403FX is electrically and mechanically identical to the SL403F across all specified parameters, including connector type, position count, shell size, termination method, fastening type, material composition, and current rating.

Q: What is the primary reason to transition from SL403F to SL403FX?

A: The SL403F is obsolete. The SL403FX maintains active production status and provides ROHS3 compliance, supporting long-term supply chain continuity and regulatory requirements.

Q: Are there packaging differences between SL403F and SL403FX?

A: The SL403F is supplied in standard packaging, while the SL403FX is supplied in bulk packaging. This distinction does not affect connector performance or compatibility.

Q: Do both parts meet the same flammability and environmental standards?

A: Both parts meet UL94 V-0 material flammability rating. The SL403FX additionally meets ROHS3 compliance requirements. Both are REACH Unaffected and classified as EAR99 for export control purposes.

Q: What applications are supported by these connectors?

A: Both the SL403F and SL403FX are suitable for audio, industrial, marine, and medical applications requiring shielded 3-position circular connectors with solder eyelet termination and threaded fastening.