AMC28MMST Equivalent & Substitute Parts

Part Overview

The AMC28MMST is a 56-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 beryllium copper contacts with gold plating and operates across a temperature range of -65°C to 200°C. The AMC28MMST 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

AMC28MMST

Sullins Connector SolutionsIn Stock: 1046AMC28MMST Datasheet

Current PartRFQ

RMC28MMST

Sullins Connector SolutionsIn Stock: 1074RMC28MMST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete AMC28MMST with the active RMC28MMST is based on electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility:

• Identical number of positions (56) and row configuration (2 rows)
• Matching pitch specification (0.100" / 2.54mm)
• Equivalent contact finish (gold) and finish thickness (30.0µin)
• Same operating temperature range (-65°C to 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 features (flush mount, top opening, threaded insert 4-40)
• Equivalent regulatory compliance (ROHS3, MSL 1)

Allowable Variations:

• Contact material differs (beryllium copper vs. phosphor bronze) within acceptable electrical performance parameters
• Card thickness specification provided for substitute (0.062") versus unspecified for main part
• Color designation (black) for substitute versus unspecified for main part
• Mounting type specified as through hole for substitute

Parameter Comparison

Engineering Selection Recommendations

The RMC28MMST serves as the direct active equivalent for the obsolete AMC28MMST. Selection of the RMC28MMST is supported by the following factors:

Product Status: The RMC28MMST maintains active production status with current inventory availability (975 pcs), whereas the AMC28MMST is obsolete. This ensures long-term component supply for ongoing production and field service requirements.

Regulatory Compliance: Both parts maintain identical ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements. The RMC28MMST carries ECCN classification EAR99 and HTSUS code 8536.69.4040, providing clear export and tariff classification.

Electrical and Mechanical Specifications: The RMC28MMST preserves all critical electrical parameters including pitch, position count, contact finish thickness, and operating temperature range. Mechanical compatibility is maintained through identical flange features, insulation material, and termination method.

Contact Material Variation: The substitution of phosphor bronze contacts for beryllium copper represents an acceptable engineering trade-off within the card edge connector category, maintaining electrical performance while supporting active manufacturing.

Frequently Asked Questions (FAQ)

Q: Can the RMC28MMST directly replace the AMC28MMST in existing designs?

A: Yes. The RMC28MMST maintains electrical and mechanical compatibility across all critical parameters including pitch, position count, contact finish, operating temperature range, and flange configuration. Both connectors interface identically with female edgecards at 0.100" spacing.

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

A: Both materials provide acceptable electrical conductivity and contact reliability for card edge connector applications. The phosphor bronze contacts in the RMC28MMST maintain the specified contact finish thickness and gold plating, ensuring equivalent electrical performance within the operating temperature range of -65°C to 200°C.

Q: Does the RMC28MMST support the same card thickness as the AMC28MMST?

A: The RMC28MMST specifies a card thickness of 0.062" (1.57mm). The AMC28MMST does not provide a card thickness specification in the available documentation. Both connectors are designed to interface with female edgecards at the same 0.100" pitch and maintain identical flange features.

Q: Are there any differences in solder termination between these parts?

A: Both the AMC28MMST and RMC28MMST utilize solder termination. The termination process and pad layout remain consistent, supporting direct substitution in PCB assembly operations.

Q: What is the moisture sensitivity level for the RMC28MMST?

A: The RMC28MMST carries MSL 1 (Unlimited) classification, identical to the AMC28MMST. This indicates no moisture sensitivity restrictions for storage, handling, or assembly.

Q: Is the RMC28MMST available in the same color as the AMC28MMST?

A: The RMC28MMST is specified in black. The AMC28MMST does not include a color designation in the available documentation. The color difference does not affect electrical or mechanical compatibility.