AMC39MMST Equivalent & Substitute Parts

Part Overview

The AMC39MMST is a 78-position male card edge connector manufactured by Sullins Connector Solutions, designed to interface with female edgecards at 0.100" (2.54mm) pitch. This connector features dual read-out configuration, gold-plated beryllium copper contacts, and operates across -65°C to 200°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field service applications.

Substiute Parts

AMC39MMST

Sullins Connector SolutionsIn Stock: 830AMC39MMST Datasheet

Current PartRFQ

RMC39MMST

Sullins Connector SolutionsIn Stock: 1231RMC39MMST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete AMC39MMST with the active RMC39MMST is based on electrical and mechanical parameter alignment within the card edge connector category. Both connectors maintain identical specifications for the following critical parameters: 78-position configuration, male gender, 0.100" (2.54mm) pitch, dual read-out, 2-row arrangement, solder termination, gold contact finish at 30.0µin thickness, -65°C to 200°C operating temperature range, PPS insulation material, flush mount with top opening and 4-40 threaded insert flange, ROHS3 compliance, and MSL 1 rating.

The RMC39MMST qualifies as a direct substitute based on these aligned parameters. Differences in contact material (phosphor bronze versus beryllium copper), card thickness specification (0.062" defined versus unspecified), color designation (black versus unspecified), and mounting type classification (through hole versus unspecified) do not preclude functional equivalence when the primary electrical and mechanical interface requirements are met.

Parameter Comparison

Engineering Selection Recommendations

The RMC39MMST is the appropriate active substitute for the obsolete AMC39MMST. Selection is based on the following engineering criteria:

Product Status and Supply Continuity: The AMC39MMST is classified as obsolete, creating supply risk for new production and field service requirements. The RMC39MMST maintains active product status with documented inventory availability (1178 pieces in stock), ensuring reliable procurement.

Regulatory Compliance: Both connectors maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, satisfying environmental and reliability standards. The RMC39MMST carries ECCN EAR99 classification with defined HTSUS code 8536.69.4040, providing clear export and trade compliance documentation.

Electrical and Mechanical Interface Compatibility: The RMC39MMST preserves all critical interface parameters: 78-position configuration, male gender, 0.100" pitch, dual read-out, 2-row arrangement, solder termination, gold contact finish at identical thickness, and identical operating temperature range. These parameters ensure direct functional compatibility with existing female edgecard designs.

Contact Material Consideration: The RMC39MMST employs phosphor bronze contacts in place of beryllium copper. Both materials provide suitable electrical conductivity and contact reliability for this connector class. Phosphor bronze is widely established in card edge connector applications and maintains the specified gold plating thickness for corrosion resistance and contact performance.

Frequently Asked Questions (FAQ)

Q: Can the RMC39MMST directly replace the AMC39MMST in existing designs?

A: Yes. The RMC39MMST maintains identical electrical and mechanical interface specifications including position count, pitch, row configuration, read-out type, termination method, contact finish, operating temperature range, and flange geometry. Direct substitution is supported for applications designed for the AMC39MMST.

Q: What is the significance of the card thickness specification difference?

A: The RMC39MMST specifies 0.062" (1.57mm) card thickness, while the AMC39MMST does not provide this specification. The RMC39MMST is designed to accommodate standard 0.062" edgecard thickness. Existing designs using the AMC39MMST should confirm their edgecard thickness matches this specification to ensure proper connector engagement and contact reliability.

Q: How do the contact materials differ between these connectors?

A: The AMC39MMST uses beryllium copper contacts, while the RMC39MMST uses phosphor bronze contacts. Both materials are suitable for card edge connector applications. Both connectors feature identical gold plating at 30.0µin thickness, which provides the primary corrosion resistance and contact interface properties. Contact material selection does not affect functional compatibility.

Q: Are there compliance or certification differences?

A: Both connectors are ROHS3 compliant with MSL 1 rating. The RMC39MMST provides additional trade documentation with ECCN EAR99 and HTSUS 8536.69.4040 classifications. These designations facilitate export and procurement processes without introducing functional differences.

Q: What is the mounting type difference?

A: The RMC39MMST specifies through-hole mounting, while the AMC39MMST does not provide this specification. Through-hole mounting indicates the connector is designed for insertion into plated through-holes on the printed circuit board. This is standard for card edge connectors of this class and does not affect compatibility with female edgecards.

Q: Is the black color of the RMC39MMST a functional difference?

A: No. Color is a cosmetic designation and does not affect electrical or mechanical function. The black color of the RMC39MMST is a visual identifier only and does not impact connector performance or compatibility.