SD-40 Circular Connector Plug - Equivalent & Substitute Parts

Part Overview

The SD-40 is a 4-position circular connector plug with male pins and solder cup termination, manufactured by CUI Devices. This connector is designed for free-hanging inline applications requiring push-pull fastening and keyed orientation. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and legacy equipment support.

Substiute Parts

SD-40

CUI DevicesIn Stock: 846SD-40 Datasheet

Current PartRFQ

09GM4MX

Switchcraft Inc.In Stock: 131009GM4MX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SD-40 is determined by the following critical parameters that must align across connector families:

• Connector Configuration: 4-position circular connector plug with male pins
• Shell Size: DIN (210 Degree) insert specification
• Mounting: Free-hanging inline configuration with push-pull fastening
• Termination Method: Solder-based connection (solder cup or solder termination)
• Electrical Performance: Current and voltage ratings suitable for the application
• Compliance: RoHS3 compliance and REACH unaffected status

The substitute part 09GM4MX from Switchcraft Inc. meets these core substitution criteria. Both connectors share the same DIN 4-position circular connector architecture, push-pull fastening mechanism, and solder termination approach. The 09GM4MX is an active product with enhanced features including shielding, backshell, and cable clamp provisions, making it suitable for applications requiring the SD-40 functionality.

Parameter Comparison

Engineering Selection Recommendations

The 09GM4MX from Switchcraft Inc. is the qualified substitute for the obsolete SD-40. Selection is based on the following engineering criteria:

Functional Equivalence: Both connectors maintain identical DIN 4-position circular connector architecture, push-pull fastening, and solder termination methodology. Mechanical and electrical interface compatibility is established through matching shell size, pin configuration, and mounting approach.

Product Availability: The SD-40 is obsolete with no ongoing manufacturing. The 09GM4MX is an active product with current production and documented inventory availability, ensuring supply chain continuity for new designs and field replacements.

Compliance Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for electronic component deployment in regulated industries.

Enhanced Features: The 09GM4MX incorporates shielding, backshell, and cable clamp provisions not present in the SD-40. These additions provide improved EMI rejection and mechanical strain relief, representing functional improvements over the original design without compromising backward compatibility.

Material Consideration: The 09GM4MX uses zinc die cast shell material versus the SD-40's steel construction. Both materials provide equivalent structural performance for the specified operating temperature range (5°C ~ 70°C) and electrical ratings.

Frequently Asked Questions (FAQ)

Q: Can the 09GM4MX directly replace the SD-40 in existing applications?

A: Yes. Both connectors share identical DIN 4-position circular connector specifications, push-pull fastening, and solder termination. The mechanical and electrical interfaces are compatible. The 09GM4MX's additional shielding and backshell features do not prevent installation in applications originally designed for the SD-40.

Q: What is the primary difference between the SD-40 and 09GM4MX?

A: The 09GM4MX is an active product from Switchcraft Inc., while the SD-40 is obsolete. The 09GM4MX includes integrated shielding, backshell, and cable clamp features. Both maintain identical core connector architecture and electrical performance specifications.

Q: Are the current and voltage ratings equivalent?

A: The SD-40 specifies 1A/2A current rating and 100VAC/12VDC voltage rating. The 09GM4MX does not provide explicit current and voltage ratings in available documentation. For applications requiring specific electrical performance verification, contact the manufacturer for detailed electrical specifications.

Q: Does the shielding on the 09GM4MX affect compatibility?

A: No. Shielding is an additional feature that improves EMI performance without affecting mechanical or electrical interface compatibility. Applications not requiring shielding will function identically with the shielded 09GM4MX.

Q: What packaging is available for the 09GM4MX?

A: The 09GM4MX is supplied in bulk packaging. The SD-40 packaging specification was not provided in available documentation.

Q: Are both parts RoHS compliant?

A: Yes. Both the SD-40 and 09GM4MX are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for electronic component use.