EB73S-SB2240X Equivalent & Substitute Parts

Part Overview

The EB73S-SB2240X is a 44-position female card edge connector manufactured by Vishay Dale, designed for dual-edge applications with 0.156" (3.96mm) pitch spacing. This connector features gold-plated phosphor bronze contacts, through-hole solder termination, and operates across -55°C to 125°C. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

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)
Number of Rows	2
Contact Material	Phosphor Bronze
Contact Finish	Gold
Mounting Type	Through Hole
Termination	Solder
Operating Temperature	-55°C ~ 125°C
Color	Black
Flange Feature	Flush Mount, Top Opening, Unthreaded, 0.128" (3.25mm) Dia

Substitute Part Grouping Explanation

Substitution compatibility for the EB73S-SB2240X is determined by the following critical parameters:

Position Count & Pitch: Both main and substitute parts must maintain 44 positions at 0.156" (3.96mm) pitch to ensure PCB layout compatibility
Dual-Edge Configuration: Connector must support dual-edge card insertion with 2 rows of 22 positions each
Card Thickness Tolerance: Substitute must accommodate card thickness within the specified range to ensure proper contact engagement
Contact Finish: Gold plating required for electrical performance and corrosion resistance
Mounting & Termination: Through-hole solder termination maintains assembly process compatibility
Flange Geometry: Flush mount design with identical unthreaded hole diameter ensures mechanical fit

The substitute part 356-022-520-102 (Mercury United Electronics, Inc.) satisfies these core substitution criteria while maintaining functional equivalence for card edge connector applications.

Parameter Comparison

Parameter	EB73S-SB2240X (Vishay Dale)	356-022-520-102 (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
Number of Rows	2	2	Match
Gender	Female	Female	Match
Contact Finish	Gold	Gold	Match
Mounting Type	Through Hole	Through Hole	Match
Termination	Solder	Solder	Match
Color	Black	Black	Match
Flange Feature	Flush Mount, Top Opening, Unthreaded, 0.128" (3.25mm) Dia	Flush Mount, Top Opening, Unthreaded, 0.128" (3.25mm) Dia	Match
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C	Partial Overlap
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Substitute Improved

Engineering Selection Recommendations

The 356-022-520-102 serves as a direct functional substitute for the obsolete EB73S-SB2240X based on matching electrical and mechanical specifications. Key selection considerations:

Compliance Advantage: The substitute part achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. This provides regulatory advantage for new designs and procurement cycles.

Temperature Operating Range: The substitute operates within -40°C to 105°C, which is narrower than the original -55°C to 125°C range. Applications requiring the full original temperature envelope must evaluate whether the reduced range meets system requirements.

Card Thickness Tolerance: Both parts accommodate the same card thickness range within practical tolerance, with the substitute supporting 0.054" to 0.070" versus the original 0.054" to 0.071". This minor difference does not impact standard PCB thicknesses.

Contact Technology Difference: The original uses phosphor bronze contacts while the substitute uses copper alloy contacts. Both materials with gold plating provide equivalent electrical performance for card edge connector applications.

Product Status: The substitute is active production, ensuring long-term availability and supply chain stability compared to the obsolete original.

Frequently Asked Questions (FAQ)

Q: Can the 356-022-520-102 be used as a direct replacement in existing designs using EB73S-SB2240X?

A: Yes, for applications operating within -40°C to 105°C. The connector maintains identical pitch, position count, card thickness tolerance, and flange geometry. If your system requires operation below -40°C or above 105°C, the substitute does not meet those specifications.

Q: What is the difference between phosphor bronze and copper alloy contacts?

A: Both materials, when gold-plated, provide equivalent electrical conductivity and corrosion resistance for card edge connector applications. The contact finish (gold plating) is the primary determinant of electrical performance, not the base material.

Q: Does the substitute part require different PCB layout or assembly procedures?

A: No. The 356-022-520-102 maintains identical pitch (0.156"), position count (44), and through-hole solder termination. Existing PCB layouts and assembly processes are directly compatible.

Q: Why does the substitute have a narrower operating temperature range?

A: The substitute is rated -40°C to 105°C versus the original -55°C to 125°C. This reflects the design specifications of the substitute manufacturer. Applications requiring the full original temperature range must source alternative parts or confirm that the reduced range meets system requirements.

Q: Is the ROHS3 compliance of the substitute part significant?

A: Yes. ROHS3 compliance indicates the substitute meets current environmental and regulatory standards, whereas the original is non-compliant. This is advantageous for new procurement and regulatory compliance requirements.

Q: Are there any packaging differences between the main part and substitute?

A: The original is listed as unspecified packaging, while the substitute is supplied in bulk packaging. Confirm bulk packaging meets your procurement and handling requirements.

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