AMC21MMSD Card Edge Connector Equivalent & Substitute Parts

Part Overview

The AMC21MMSD is a 42-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 AMC21MMSD is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure ongoing component availability for production and field service applications.

Substiute Parts

AMC21MMSD

Sullins Connector SolutionsIn Stock: 1044AMC21MMSD Datasheet

Current PartRFQ

RMC21MMSD

Sullins Connector SolutionsIn Stock: 1178RMC21MMSD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete AMC21MMSD with the active RMC21MMSD is based on electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility:

• Identical position count (42 positions)
• Matching pitch specification (0.100" / 2.54mm)
• Identical row configuration (2 rows)
• Matching contact finish (gold plating at 30.0µin thickness)
• Identical operating temperature range (-65°C ~ 200°C)
• Equivalent insulation material (Polyphenylene Sulfide)
• Matching read-out configuration (dual)

Mechanical Compatibility:

• Identical gender (male)
• Matching termination method (solder)
• Identical flange diameter (0.125" / 3.18mm)
• Equivalent mounting classification (flush mount)
• Matching connector class (card edge, fits female edgecards)

Compliance Equivalence:

• Both parts are ROHS3 compliant
• Both parts have MSL rating of 1 (unlimited moisture sensitivity)
• Both parts are REACH unaffected

The RMC21MMSD represents the direct active successor to the AMC21MMSD within the Sullins Connector Solutions product line, maintaining functional and electrical equivalence while offering current production status and availability.

Parameter Comparison

Engineering Selection Recommendations

The RMC21MMSD is the direct active equivalent for the obsolete AMC21MMSD. Both connectors maintain identical electrical specifications, pitch, position count, and operating temperature range. The RMC21MMSD carries active product status with current manufacturing support and availability, whereas the AMC21MMSD is obsolete.

Both parts satisfy ROHS3 compliance requirements and REACH regulatory status, ensuring compatibility with current environmental and regulatory standards. The MSL rating of 1 (unlimited) on both parts indicates no moisture sensitivity constraints during storage or handling.

The primary differences between the two parts are contact material composition (beryllium copper versus phosphor bronze), flange opening orientation (side opening versus top opening), and the addition of through-hole mounting specification on the RMC21MMSD. These differences do not affect electrical or mechanical compatibility when interfacing with standard female edgecards at 0.100" pitch.

Selection of the RMC21MMSD for new designs and production applications is appropriate based on active product status and equivalent functional performance.

Frequently Asked Questions (FAQ)

Q: Can the RMC21MMSD directly replace the AMC21MMSD in existing designs?

A: Yes. Both connectors share identical electrical specifications including 42 positions, 0.100" pitch, dual read-out configuration, gold contact finish at 30.0µin thickness, and -65°C to 200°C operating temperature range. Both use solder termination and PPS insulation material.

Q: What is the difference between beryllium copper and phosphor bronze contact materials?

A: The AMC21MMSD uses beryllium copper contacts while the RMC21MMSD uses phosphor bronze contacts. Both materials are suitable for card edge connector applications and maintain the specified gold plating thickness and electrical performance.

Q: Does the flange opening orientation difference affect compatibility?

A: The AMC21MMSD features side opening while the RMC21MMSD features top opening. This difference relates to connector insertion direction and board layout orientation but does not affect electrical compatibility with female edgecards.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the AMC21MMSD and RMC21MMSD are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of the MSL rating of 1?

A: MSL 1 (unlimited) indicates that both connectors have no moisture sensitivity constraints. These parts do not require special moisture control during storage, handling, or assembly processes.

Q: Is the RMC21MMSD available in current inventory?

A: The RMC21MMSD is an active product with 1113 pieces in new original stock, ensuring availability for production and field service applications.

Q: What card thickness does the RMC21MMSD accommodate?

A: The RMC21MMSD is specified for 0.062" (1.57mm) card thickness, which is the standard thickness for most industrial and commercial edgecard applications.