AMC51MMSD Card Edge Connector Equivalent & Substitute Parts

Part Overview

The AMC51MMSD is a 102-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 AMC51MMSD 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

AMC51MMSD

Sullins Connector SolutionsIn Stock: 1124AMC51MMSD Datasheet

Current PartRFQ

RMC51MMSD

Sullins Connector SolutionsIn Stock: 988RMC51MMSD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete AMC51MMSD with the active RMC51MMSD is based on alignment of the following critical parameters:

Electrical Compatibility:

• Identical number of positions (102)
• Identical pitch specification (0.100" / 2.54mm)
• Identical gender (Male)
• Identical number of rows (2)
• Identical read-out configuration (Dual)
• Identical termination method (Solder)
• Identical contact finish specification (Gold, 30.0µin thickness)

Environmental & Compliance Compatibility:

• Identical operating temperature range (-65°C ~ 200°C)
• Identical insulation material (Polyphenylene Sulfide)
• Identical RoHS3 compliance status
• Identical Moisture Sensitivity Level (MSL 1)

Mechanical Differences Noted: The RMC51MMSD introduces the following mechanical variations: specified card thickness (0.062"), black color designation, through-hole mounting type, and top opening flange configuration (versus side opening on the original). These differences do not affect electrical substitution capability but require mechanical design verification for specific applications.

Parameter Comparison

Engineering Selection Recommendations

The RMC51MMSD serves as the direct active substitute for the obsolete AMC51MMSD. Selection is supported by:

Product Status Alignment: The RMC51MMSD maintains active production status with documented inventory availability (952 pcs), ensuring supply chain continuity for new designs and field service requirements.

Compliance Certification: Both connectors maintain identical ROHS3 compliance and MSL 1 ratings, satisfying regulatory and environmental requirements without modification to existing qualification documentation.

Electrical Equivalence: Identical electrical specifications across all critical parameters—position count, pitch, gender, row configuration, read-out type, termination method, and contact finish—establish direct functional interchangeability.

Contact Material Variation: The substitution introduces phosphor bronze contacts in place of beryllium copper. Both materials provide equivalent performance within the specified operating temperature range and maintain identical gold plating thickness. This material change does not compromise electrical or mechanical function.

Mechanical Design Consideration: The RMC51MMSD specifies card thickness (0.062") and through-hole mounting, whereas the original part does not document these parameters. PCB layout and card edge design must accommodate the 0.062" card thickness specification and top-opening flange orientation to ensure proper mating alignment.

Frequently Asked Questions (FAQ)

Q: Can the RMC51MMSD directly replace the AMC51MMSD in existing designs?

A: Electrical substitution is direct. The RMC51MMSD maintains identical position count (102), pitch (0.100"), gender (Male), row configuration (2), read-out type (Dual), termination method (Solder), contact finish (Gold, 30.0µin), and operating temperature range (-65°C ~ 200°C). Mechanical design verification is required to confirm compatibility with the specified card thickness (0.062") and top-opening flange configuration.

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

A: The AMC51MMSD uses beryllium copper contacts, while the RMC51MMSD uses phosphor bronze contacts. Both materials provide equivalent electrical performance and durability within the specified operating temperature range (-65°C ~ 200°C). The contact finish (gold plating at 30.0µin thickness) is identical on both parts, ensuring equivalent contact resistance and reliability.

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

A: Both connectors maintain identical ROHS3 compliance status and MSL 1 (Unlimited) moisture sensitivity rating. No additional qualification or testing is required from a regulatory or environmental standpoint.

Q: What does "Dual Read Out" mean for this connector?

A: Dual read-out indicates that the connector provides two independent signal paths or contact points per position, enabling redundant or differential signaling configurations typical in card edge connector applications.

Q: Does the card thickness specification affect compatibility?

A: The RMC51MMSD specifies 0.062" (1.57mm) card thickness. This parameter must align with the physical card edge design in your application. The original AMC51MMSD does not document card thickness, requiring design review to confirm the 0.062" specification is compatible with existing edgecard dimensions.

Q: What is the difference between "Side Opening" and "Top Opening" flange features?

A: Side opening (AMC51MMSD) allows card insertion from the side of the connector body, while top opening (RMC51MMSD) allows insertion from the top. This mechanical difference affects PCB layout and card insertion direction and must be evaluated for physical compatibility with existing mechanical designs.

Q: Is the black color of the RMC51MMSD significant?

A: The black color is a cosmetic designation and does not affect electrical or mechanical function. It may be relevant for visual identification or aesthetic requirements in specific applications.

Q: What inventory status should I consider for procurement?

A: The RMC51MMSD is actively produced with 952 pcs documented in stock. The AMC51MMSD is obsolete with limited remaining inventory (1023 pcs). For new designs and long-term supply assurance, the RMC51MMSD is the appropriate selection.