AMC55MMST Equivalent & Substitute Parts

Part Overview

The AMC55MMST is a 110-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 AMC55MMST is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure component availability for new production and field service applications.

Substiute Parts

AMC55MMST

Sullins Connector SolutionsIn Stock: 954AMC55MMST Datasheet

Current PartRFQ

RMC55MMST

Sullins Connector SolutionsIn Stock: 931RMC55MMST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete AMC55MMST with the active RMC55MMST is based on electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility:

• Identical position count (110 positions across 2 rows)
• Matching pitch specification (0.100" / 2.54mm)
• Identical dual read-out configuration
• Equivalent contact finish (gold plating at 30.0µin thickness)
• Matching operating temperature range (-65°C ~ 200°C)
• Identical termination method (solder)

Mechanical Compatibility:

• Same gender (male) and card type interface (fits female edgecards)
• Identical insulation material (Polyphenylene Sulfide)
• Matching flange configuration (flush mount, top opening, threaded insert 4-40)
• Equivalent moisture sensitivity level (MSL 1)

Compliance Equivalence:

• Both parts maintain ROHS3 compliance
• Both parts are REACH unaffected

The RMC55MMST represents an active production equivalent with enhanced specifications including specified card thickness (0.062"), defined mounting type (through hole), and black color designation. Contact material differs (phosphor bronze versus beryllium copper), representing a material substitution within acceptable electrical performance parameters for this connector class.

Parameter Comparison

Engineering Selection Recommendations

The RMC55MMST is the direct active equivalent for the obsolete AMC55MMST. Selection of the RMC55MMST is supported by the following engineering factors:

Product Status: The RMC55MMST maintains active production status, ensuring long-term component availability and supply chain continuity. The AMC55MMST obsolete classification creates sourcing risk for new designs and field service requirements.

Compliance Certification: Both parts maintain identical ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for current manufacturing standards.

Electrical and Mechanical Equivalence: The RMC55MMST preserves all critical electrical parameters including position count, pitch, read-out configuration, contact finish specification, and operating temperature range. Mechanical compatibility is maintained through identical flange configuration, insulation material, and termination method.

Contact Material Substitution: The phosphor bronze contact material in the RMC55MMST represents a standard material substitution within the card edge connector product class. Both beryllium copper and phosphor bronze provide equivalent electrical conductivity and gold plating adhesion for this connector application.

The RMC55MMST is suitable for direct substitution in applications currently specified for the AMC55MMST without design modification.

Frequently Asked Questions (FAQ)

Q: Can the RMC55MMST directly replace the AMC55MMST in existing designs?

A: Yes. The RMC55MMST maintains electrical and mechanical compatibility across all critical parameters including position count, pitch, read-out configuration, operating temperature range, and flange geometry. No design modification is required.

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

A: Both materials are standard contact materials for gold-plated card edge connectors. Phosphor bronze in the RMC55MMST provides equivalent electrical conductivity and gold plating adhesion for this connector class. The material substitution does not affect electrical performance or reliability.

Q: Are there any compliance differences between the two parts?

A: No. Both the AMC55MMST and RMC55MMST maintain ROHS3 compliance and REACH unaffected status. Regulatory requirements are equivalent.

Q: What does the specified card thickness of 0.062" in the RMC55MMST indicate?

A: The 0.062" (1.57mm) card thickness specification in the RMC55MMST defines the edgecard dimension for which the connector is optimized. This represents a standard thickness for female edgecards compatible with this connector class.

Q: Why is the AMC55MMST classified as obsolete?

A: Obsolete classification indicates the part is no longer in active production. The RMC55MMST represents the current active production equivalent, ensuring availability for new designs and ongoing field service applications.

Q: Are the moisture sensitivity levels equivalent?

A: Yes. Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage, handling, or assembly processes.

Q: What is the significance of the through-hole mounting type specified for the RMC55MMST?

A: Through-hole mounting indicates the connector is designed for insertion into plated through-holes on printed circuit boards. This represents the standard mounting configuration for solder-terminated card edge connectors in this product class.