AMC31MMST Card Edge Connector Equivalent & Substitute Parts

Part Overview

The AMC31MMST is a 62-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 AMC31MMST is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Number of Positions	62
Gender	Male
Pitch	0.100" (2.54mm)
Number of Rows	2
Read Out Configuration	Dual
Termination Type	Solder
Operating Temperature Range	-65°C ~ 200°C
Contact Finish	Gold
Contact Finish Thickness	30.0µin (0.76µm)
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 RMC31MMST qualifies as a direct substitute for the AMC31MMST based on the following critical parameters that determine functional compatibility:

Matching Parameters:

62-position configuration with dual read-out
Male gender for female edgecard interface
0.100" (2.54mm) pitch spacing
2-row arrangement
Solder termination
Operating temperature range -65°C ~ 200°C
Gold contact finish at 30.0µin thickness
Polyphenylene Sulfide insulation material
Flush mount with top opening and 4-40 threaded insert
ROHS3 compliance
MSL 1 rating

Allowable Variations:

Contact material: Beryllium copper (AMC31MMST) to phosphor bronze (RMC31MMST)
Card thickness specification: Not specified (AMC31MMST) to 0.062" (1.57mm) (RMC31MMST)
Mounting type: Not specified (AMC31MMST) to through hole (RMC31MMST)
Color: Not specified (AMC31MMST) to black (RMC31MMST)
Product status: Obsolete (AMC31MMST) to active (RMC31MMST)

Parameter Comparison

Parameter	AMC31MMST	RMC31MMST
Manufacturer	Sullins Connector Solutions	Sullins Connector Solutions
Category	Card Edge Connectors	Card Edge Connectors
Number of Positions	62	62
Gender	Male	Male
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2
Read Out	Dual	Dual
Termination	Solder	Solder
Contact Material	Beryllium Copper	Phosphor Bronze
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 RMC31MMST is the direct active equivalent for the obsolete AMC31MMST. Both components maintain identical electrical and mechanical specifications across all critical interface parameters, including position count, pitch, row configuration, termination method, and operating temperature range.

The RMC31MMST is ROHS3 compliant and carries active product status, ensuring availability for current production and future procurement. The contact material transition from beryllium copper to phosphor bronze, combined with identical gold plating thickness and finish specifications, maintains electrical performance within the connector's functional requirements.

The specified card thickness of 0.062" (1.57mm) for the RMC31MMST and the through-hole mounting designation provide additional design clarity for PCB integration compared to the obsolete AMC31MMST specification.

Frequently Asked Questions (FAQ)

Q: Can the RMC31MMST directly replace the AMC31MMST in existing designs?

A: Yes. The RMC31MMST maintains identical electrical and mechanical specifications across all critical parameters: 62-position configuration, 0.100" pitch, dual read-out, solder termination, gold contact finish, and operating temperature range. The connector interfaces with female edgecards identically to the original component.

Q: What is the significance of the contact material change from beryllium copper to phosphor bronze?

A: Both materials provide equivalent electrical conductivity and contact reliability within the connector's operational specifications. Phosphor bronze offers comparable performance characteristics while maintaining the identical gold plating thickness of 30.0µin.

Q: Does the RMC31MMST require different PCB layout considerations?

A: The RMC31MMST specifies a card thickness of 0.062" (1.57mm) and through-hole mounting, providing explicit design parameters. The pitch, position count, and flange configuration remain identical to the AMC31MMST, requiring no changes to connector footprint or mounting hole patterns.

Q: Are there compliance differences between the two components?

A: Both components are ROHS3 compliant with MSL 1 rating. The RMC31MMST carries active product status, ensuring ongoing compliance support and availability. The AMC31MMST is classified as obsolete.

Q: What inventory considerations apply to this substitution?

A: The RMC31MMST is available with 1078 pieces in stock as new original inventory, compared to 967 pieces for the obsolete AMC31MMST. The active status of the RMC31MMST ensures continued availability for production requirements.

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