AMC26MMST Card Edge Connector Equivalent & Substitute Parts

Part Overview

The AMC26MMST is a 52-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 AMC26MMST is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Number of Positions	52
Pitch	0.100" (2.54mm)
Gender	Male
Number of Rows	2
Card Type	Fits Female Edgecards
Read Out	Dual
Contact Finish	Gold
Contact Finish Thickness	30.0µin (0.76µm)
Operating Temperature Range	-65°C ~ 200°C
Termination	Solder
Insulation Material	Polyphenylene Sulfide (PPS)
Flange Feature	Flush Mount, Top Opening, Threaded Insert, 4-40
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

The RMC26MMST qualifies as a direct substitute for the AMC26MMST based on the following critical parameters that determine functional compatibility:

Matching Parameters:

52-position configuration with 26 positions per row
0.100" (2.54mm) pitch spacing
Male gender connector
Dual read-out functionality
Gold contact finish at 30.0µin thickness
Operating temperature range of -65°C to 200°C
Solder termination method
Polyphenylene Sulfide (PPS) insulation material
Flush mount flange with top opening and 4-40 threaded insert
ROHS3 compliance
MSL 1 rating

Differentiating Parameters:

Contact material: Beryllium copper (AMC26MMST) versus phosphor bronze (RMC26MMST)
Card thickness specification: Not specified (AMC26MMST) versus 0.062" (1.57mm) (RMC26MMST)
Mounting type: Not specified (AMC26MMST) versus through hole (RMC26MMST)
Color: Not specified (AMC26MMST) versus black (RMC26MMST)
Product status: Obsolete (AMC26MMST) versus active (RMC26MMST)

The RMC26MMST maintains electrical and mechanical compatibility through identical pitch, position count, contact finish specifications, and operating parameters.

Parameter Comparison

Parameter	AMC26MMST	RMC26MMST
Manufacturer	Sullins Connector Solutions	Sullins Connector Solutions
Category	Card Edge Connectors	Card Edge Connectors
Number of Positions	52	52
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Gender	Male	Male
Number of Rows	2	2
Card Type	Fits Female Edgecards	Fits Female Edgecards
Read Out	Dual	Dual
Termination	Solder	Solder
Contact Finish	Gold	Gold
Contact Finish Thickness	30.0µin (0.76µm)	30.0µin (0.76µm)
Operating Temperature	-65°C ~ 200°C	-65°C ~ 200°C
Insulation Material	Polyphenylene Sulfide (PPS)	Polyphenylene Sulfide (PPS)
Flange Feature	Flush Mount, Top Opening, Threaded Insert, 4-40	Flush Mount, Top Opening, Threaded Insert, 4-40
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active

Engineering Selection Recommendations

The RMC26MMST is the appropriate substitute for the obsolete AMC26MMST in applications requiring 52-position male card edge connectors with 0.100" pitch spacing. Both components maintain identical electrical specifications, contact finish characteristics, and operating temperature parameters. The RMC26MMST is currently in active production status with 995 units available in inventory, compared to the AMC26MMST's obsolete classification.

Both connectors satisfy ROHS3 compliance requirements and carry MSL 1 ratings, indicating compatibility with standard handling and storage protocols. The RMC26MMST's active product status ensures long-term availability and supply chain continuity for new designs and production runs.

The primary differences between these connectors—contact material composition (phosphor bronze versus beryllium copper), specified card thickness, and color designation—do not affect functional compatibility when interfacing with standard female edgecard receptacles at the specified pitch and position configuration.

Frequently Asked Questions (FAQ)

Q: Can the RMC26MMST directly replace the AMC26MMST in existing designs?

A: Yes. Both connectors share identical pitch (0.100"), position count (52), gender (male), row configuration (2), contact finish (gold at 30.0µin), and operating temperature range (-65°C to 200°C). The mechanical interface with female edgecards and electrical performance remain equivalent.

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

A: Both materials provide acceptable electrical conductivity and mechanical durability for card edge connector applications. The contact finish (gold plating) is identical at 30.0µin thickness, which is the primary factor determining electrical performance and corrosion resistance.

Q: Does the RMC26MMST's specified card thickness of 0.062" affect compatibility?

A: The RMC26MMST is designed to accommodate 0.062" (1.57mm) card thickness. Compatibility depends on the actual thickness of the female edgecard in the application. Standard edgecard designs typically operate within this specification.

Q: Are both connectors suitable for high-temperature applications?

A: Yes. Both the AMC26MMST and RMC26MMST operate across -65°C to 200°C, supporting applications requiring extended temperature ranges. The Polyphenylene Sulfide (PPS) insulation material in both connectors provides thermal stability across this range.

Q: What is the difference between the ECCN classifications listed for these parts?

A: The AMC26MMST carries an ECCN designation of "OBSOLETE," reflecting its discontinued status. The RMC26MMST carries an ECCN designation of "EAR99," indicating standard commercial classification for active products.

Q: Are both connectors RoHS compliant?

A: Yes. Both the AMC26MMST and RMC26MMST are ROHS3 compliant and carry MSL 1 ratings, indicating compatibility with lead-free manufacturing processes and standard moisture handling requirements.

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