AMC18MMST Equivalent & Substitute Parts

Part Overview

The AMC18MMST is a 36-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 the temperature range of -65°C to 200°C. The AMC18MMST is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Connector Type	Card Edge Connector, Male
Number of Positions	36
Pitch	0.100" (2.54mm)
Read Out Configuration	Dual
Termination Method	Solder
Contact Material	Beryllium Copper or Phosphor Bronze
Contact Finish	Gold, 30.0µin (0.76µm)
Operating Temperature Range	-65°C to 200°C
Insulation Material	Polyphenylene Sulfide (PPS)
Flange Feature	Flush Mount, Top Opening, Threaded Insert, 4-40
RoHS Compliance	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

The RMC18MMST serves as a direct functional equivalent to the AMC18MMST based on the following critical parameters:

Matching Parameters:

36-position male connector configuration
0.100" (2.54mm) pitch spacing
Dual read-out design
Solder termination
Gold contact finish at 30.0µin (0.76µm) thickness
Operating temperature range of -65°C to 200°C
Polyphenylene Sulfide (PPS) insulation material
Flush Mount, Top Opening, Threaded Insert, 4-40 flange feature
ROHS3 compliance
Moisture Sensitivity Level 1 (Unlimited)

Distinguishing Parameters:

Contact material: Phosphor Bronze (RMC18MMST) versus Beryllium Copper (AMC18MMST)
Card thickness specification: 0.062" (1.57mm) defined for RMC18MMST
Mounting type: Through Hole designation for RMC18MMST
Color: Black finish on RMC18MMST
Product status: Active (RMC18MMST) versus Obsolete (AMC18MMST)

Parameter Comparison

Parameter	AMC18MMST	RMC18MMST
Manufacturer	Sullins Connector Solutions	Sullins Connector Solutions
Category	Card Edge Connectors	Card Edge Connectors
Description	CONN CARDEDGE MALE 36POS 0.100	CONN CARDEDGE MALE 36POS 0.100
Gender	Male	Male
Number of Positions	36	36
Number of Rows	2	2
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
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
Material - Insulation	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)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active

Engineering Selection Recommendations

The RMC18MMST is the appropriate substitute for the obsolete AMC18MMST in applications requiring a 36-position male card edge connector with 0.100" pitch and dual read-out configuration. Both connectors maintain identical electrical and thermal specifications, including operating temperature range, contact finish thickness, and insulation material properties.

The RMC18MMST carries active product status with full ROHS3 compliance and REACH unaffected designation, ensuring availability for current and future production. The connector's Phosphor Bronze contact material and Through Hole mounting type provide equivalent performance characteristics to the original Beryllium Copper design while maintaining the same gold plating specification and flange geometry.

The specified card thickness of 0.062" (1.57mm) for the RMC18MMST aligns with standard edgecard dimensions and does not restrict compatibility with existing female edgecard interfaces designed for the AMC18MMST.

Frequently Asked Questions (FAQ)

Q: Are the AMC18MMST and RMC18MMST electrically interchangeable?

A: Yes. Both connectors share identical electrical specifications including 36-position configuration, 0.100" pitch, dual read-out design, gold contact finish at 30.0µin thickness, and operating temperature range of -65°C to 200°C.

Q: What is the primary difference between these two connectors?

A: The RMC18MMST uses Phosphor Bronze contacts compared to the Beryllium Copper contacts in the AMC18MMST. Both materials provide equivalent performance within the specified operating parameters. The RMC18MMST also includes defined card thickness specification of 0.062" (1.57mm) and Through Hole mounting designation.

Q: Can the RMC18MMST be used as a direct replacement in existing designs?

A: Yes. The RMC18MMST maintains the same flange geometry (Flush Mount, Top Opening, Threaded Insert, 4-40), solder termination method, and insulation material (PPS) as the AMC18MMST, enabling direct substitution in existing PCB layouts and edgecard interfaces.

Q: What is the significance of the product status change from Obsolete to Active?

A: The RMC18MMST's active status ensures ongoing availability, supply chain continuity, and manufacturer support. This eliminates procurement risk associated with obsolete components and provides access to current manufacturing batches with full compliance documentation.

Q: Are both connectors RoHS3 compliant?

A: Yes. Both the AMC18MMST and RMC18MMST are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), meeting current regulatory requirements for electronic component manufacturing and assembly.

Q: Does the card thickness specification of 0.062" (1.57mm) for the RMC18MMST affect compatibility?

A: No. The specified card thickness represents the standard dimension for edgecards designed to interface with 0.100" pitch male connectors. This specification does not restrict compatibility with existing female edgecard designs.

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