AMC25MMSD Card Edge Connector Equivalent & Substitute Parts

Part Overview

The AMC25MMSD is a 50-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 AMC25MMSD 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

AMC25MMSD

Sullins Connector SolutionsIn Stock: 1003AMC25MMSD Datasheet

Current PartRFQ

RMC25MMSD

Sullins Connector SolutionsIn Stock: 754RMC25MMSD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete AMC25MMSD with the active RMC25MMSD is based on equivalence across the following critical parameters:

Functionally Equivalent Parameters:

• Connector type and gender (Card Edge Connector, Male)
• Number of positions and rows (50 positions, 2 rows)
• Pitch specification (0.100" / 2.54mm)
• Read-out configuration (Dual)
• Contact finish and thickness (Gold, 30.0µin)
• Termination method (Solder)
• Operating temperature range (-65°C ~ 200°C)
• Insulation material (Polyphenylene Sulfide)
• Compliance certifications (ROHS3, MSL 1)

Differences Noted:

• Contact material: Beryllium Copper (AMC25MMSD) versus Phosphor Bronze (RMC25MMSD)
• Card thickness specification: Not specified (AMC25MMSD) versus 0.062" (RMC25MMSD)
• Flange opening orientation: Side Opening (AMC25MMSD) versus Top Opening (RMC25MMSD)
• Mounting type: Not specified (AMC25MMSD) versus Through Hole (RMC25MMSD)
• Color: Not specified (AMC25MMSD) versus Black (RMC25MMSD)
• Product status: Obsolete (AMC25MMSD) versus Active (RMC25MMSD)

The RMC25MMSD maintains all critical electrical and mechanical parameters required for functional substitution while offering active product status and current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The RMC25MMSD is the direct active equivalent for the obsolete AMC25MMSD. Selection of the RMC25MMSD is supported by the following engineering criteria:

Product Status and Availability: The RMC25MMSD holds active product status with current manufacturing support from Sullins Connector Solutions, ensuring long-term component availability and supply chain continuity. The AMC25MMSD is classified as obsolete and subject to end-of-life constraints.

Compliance and Certification: Both parts maintain identical ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, confirming equivalent environmental and regulatory qualification. The RMC25MMSD carries REACH Unaffected status and EAR99 ECCN classification.

Electrical and Mechanical Compatibility: The RMC25MMSD preserves all critical functional parameters including 50-position dual read-out configuration, 0.100" pitch, gold contact finish at 30.0µin thickness, solder termination, and -65°C to 200°C operating temperature range. Polyphenylene sulfide insulation material is maintained across both parts.

Physical Interface Considerations: The RMC25MMSD specifies 0.062" (1.57mm) card thickness and top-opening flange orientation, differing from the side-opening configuration of the AMC25MMSD. Design verification is required to confirm mechanical fit within existing card edge receptacles and mounting structures.

Contact Material Transition: The RMC25MMSD employs phosphor bronze contacts in place of beryllium copper. Both materials provide equivalent electrical performance and gold plating thickness. This substitution does not affect signal integrity or electrical characteristics within the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can the RMC25MMSD directly replace the AMC25MMSD in existing designs?

A: The RMC25MMSD is electrically and functionally equivalent to the AMC25MMSD across all critical parameters including position count, pitch, contact finish, and operating temperature range. Physical fit verification is required due to differences in flange opening orientation (top opening versus side opening) and specified card thickness (0.062" for RMC25MMSD versus unspecified for AMC25MMSD).

Q: What is the significance of the contact material difference between beryllium copper and phosphor bronze?

A: Both beryllium copper and phosphor bronze provide equivalent electrical conductivity and contact reliability when finished with identical gold plating (30.0µin thickness). The phosphor bronze contacts in the RMC25MMSD deliver equivalent performance for signal transmission and power distribution applications within the specified -65°C to 200°C operating range.

Q: Are there any compliance or regulatory differences between these parts?

A: Both the AMC25MMSD and RMC25MMSD maintain ROHS3 compliance and MSL 1 (Unlimited) ratings. The RMC25MMSD carries additional regulatory documentation including REACH Unaffected status and EAR99 ECCN classification, supporting current export and supply chain requirements.

Q: What does the flange opening orientation difference mean for installation?

A: The AMC25MMSD features side opening flange configuration while the RMC25MMSD features top opening. This difference affects the mechanical approach angle during card insertion and the spatial requirements within the mounting structure. Physical layout verification is necessary to confirm compatibility with existing receptacle designs and PCB assembly fixtures.

Q: Is the RMC25MMSD available in the same packaging as the AMC25MMSD?

A: Both parts are supplied in equivalent packaging configurations suitable for solder termination applications. The RMC25MMSD is currently in active production with 734 pieces available in new original stock, ensuring reliable supply for new designs and field service replacements.

Q: What is the card thickness specification and why does it matter?

A: The RMC25MMSD specifies 0.062" (1.57mm) card thickness, which defines the mechanical tolerance band for female edgecard receptacles. The AMC25MMSD does not specify card thickness in the provided documentation. Confirmation of card thickness compatibility with existing female edgecard designs is required prior to implementation.