50-44S-30 Card Edge Connector Equivalent & Substitute Parts

Part Overview

The 50-44S-30 is a 44-position female card edge connector manufactured by Cinch Connectivity Solutions. This dual-edge connector features a 0.156" (3.96mm) pitch and gold-plated beryllium copper contacts rated for -65°C to 125°C operation. The part is currently obsolete, making identification of compatible substitute components essential for system maintenance, repair, and legacy equipment support.

Key Parameters

Parameter	Value
Connector Type	Card Edge, Dual Female
Number of Positions	44
Pitch	0.156" (3.96mm)
Card Thickness Range	0.054" ~ 0.071" (1.37mm ~ 1.80mm)
Contact Material	Beryllium Copper
Contact Finish	Gold
Termination	Solder Eyelet(s)
Operating Temperature	-65°C ~ 125°C
Mounting Type	Panel Mount
Insulation Material	Diallyl Phthalate (DAP)

Substitute Part Grouping Explanation

Substitution eligibility for the 50-44S-30 is determined by the following critical parameters:

Connector Configuration: 44-position, dual-edge, female gender
Pitch Specification: 0.156" (3.96mm) center-to-center spacing
Card Thickness Compatibility: Acceptable range 0.054" ~ 0.071" (1.37mm ~ 1.80mm)
Contact Finish: Gold plating for signal integrity and corrosion resistance
Termination Method: Solder eyelet connection to PCB
Read Out: Dual configuration

The substitute part 357-044-555-202 meets these core electrical and mechanical requirements, enabling direct functional replacement in applications where the 50-44S-30 is no longer available.

Parameter Comparison

Parameter	50-44S-30 (Cinch)	357-044-555-202 (Mercury)	Compatibility
Number of Positions	44	44	Match
Pitch	0.156" (3.96mm)	0.156" (3.96mm)	Match
Card Thickness Range	0.054" ~ 0.071" (1.37mm ~ 1.80mm)	0.054" ~ 0.070" (1.37mm ~ 1.78mm)	Compatible
Gender	Female	Female	Match
Contact Finish	Gold	Gold	Match
Termination	Solder Eyelet(s)	Solder Eyelet(s)	Match
Read Out	Dual	Dual	Match
Operating Temperature	-65°C ~ 125°C	-40°C ~ 105°C	Partial (357-044-555-202 has narrower range)
Contact Material	Beryllium Copper	Copper Alloy	Functionally equivalent
Insulation Material	Diallyl Phthalate (DAP)	Polyester Thermoplastic	Different material, same functional class
Product Status	Obsolete	Active	Substitute is current production
RoHS Status	Non-compliant	ROHS3 Compliant	Substitute meets current regulations

Engineering Selection Recommendations

The 357-044-555-202 serves as a functional substitute for the obsolete 50-44S-30 based on matching electrical and mechanical specifications. Both connectors share identical pitch, position count, dual-edge configuration, and gold contact finish required for signal integrity.

Key considerations for selection:

Operating Temperature: The 357-044-555-202 operates within -40°C to 105°C, which is narrower than the original 50-44S-30 range of -65°C to 125°C. Applications requiring the full original temperature range must evaluate whether the substitute's reduced range is acceptable for the intended environment.

Regulatory Compliance: The 357-044-555-202 is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The original 50-44S-30 is RoHS non-compliant, making the substitute preferable for new designs and systems subject to environmental regulations.

Contact Material: The substitute uses copper alloy contacts versus beryllium copper in the original. Both materials provide equivalent electrical performance and corrosion resistance when gold-plated.

Insulation Material: The substitute employs polyester thermoplastic insulation instead of diallyl phthalate. Both materials are suitable for the specified operating conditions and provide equivalent mechanical and electrical properties.

Availability: The 357-044-555-202 is currently in active production with 848 units in stock, ensuring supply continuity for legacy system support and repair applications.

Frequently Asked Questions (FAQ)

Q: Can the 357-044-555-202 directly replace the 50-44S-30 in existing assemblies?

A: Yes, the 357-044-555-202 is mechanically and electrically compatible for direct replacement. Both connectors feature identical 44-position, 0.156" pitch dual-edge configurations with gold-plated contacts and solder eyelet termination. The card thickness acceptance range is compatible within 0.054" to 0.070".

Q: What is the significance of the operating temperature difference?

A: The 50-44S-30 operates from -65°C to 125°C, while the 357-044-555-202 operates from -40°C to 105°C. Applications operating at temperatures below -40°C or above 105°C require the original specification. For standard industrial and commercial environments, the substitute's temperature range is typically sufficient.

Q: Does the change in contact material affect performance?

A: Both beryllium copper and copper alloy contacts, when gold-plated to the same finish thickness, provide equivalent electrical conductivity and signal integrity. The gold plating is the primary factor determining corrosion resistance and contact reliability in this application.

Q: Why is RoHS compliance important for this substitution?

A: RoHS3 compliance ensures the substitute meets current environmental and regulatory standards for lead-free manufacturing. For systems subject to regulatory oversight or requiring compliance documentation, the 357-044-555-202 is the appropriate choice.

Q: Are there any packaging differences between these connectors?

A: The 50-44S-30 packaging is not specified in available documentation. The 357-044-555-202 is supplied in box packaging. Verify packaging requirements for your specific procurement and assembly processes.

Q: What is the difference between the insulation materials?

A: Diallyl phthalate (DAP) and polyester thermoplastic are both thermoset and thermoplastic materials respectively, suitable for connector insulation. Both provide adequate electrical insulation, mechanical strength, and thermal stability for this connector class. Material selection does not impact functional compatibility.

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