EB72S-SB104X1 Card Edge Connector Equivalent & Substitute Parts

Part Overview

The EB72S-SB104X1 is a 20-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 classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

EB72S-SB104X1

Vishay DaleIn Stock: 795EB72S-SB104X1 Datasheet

Current PartRFQ

306-010-520-102

Mercury United Electronics, Inc.In Stock: 1112306-010-520-102 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the EB72S-SB104X1 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Number of Positions: 20
• Gender: Female
• Card Type: Dual Edge
• Pitch: 0.156" (3.96mm)
• Mounting Type: Through Hole
• Termination: Solder
• Flange Feature: Flush Mount, Top Opening, Unthreaded, 0.128" (3.25mm) Dia

Allowable Variations:

• Card Thickness Range: Substitute must accommodate the original range of 0.054" ~ 0.071" (1.37mm ~ 1.80mm)
• Contact Material: Copper Alloy is acceptable as an alternative to Phosphor Bronze
• Contact Type: Cantilever is acceptable as an alternative to Full Bellows
• Operating Temperature: Substitute minimum must not exceed -55°C; substitute maximum must not be lower than 125°C
• Contact Finish Thickness: Variations permitted if gold plating is maintained
• Read Out Configuration: Single or Dual acceptable

The Mercury United Electronics 306-010-520-102 meets all mandatory matching parameters and allowable variation criteria, qualifying it as a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 306-010-520-102 (Mercury United Electronics)

The 306-010-520-102 is the manufacturer-recommended substitute for the obsolete EB72S-SB104X1. This connector maintains functional equivalence across all critical electrical and mechanical parameters required for card edge connector applications.

Compliance Advantage: The 306-010-520-102 achieves ROHS3 compliance, whereas the original EB72S-SB104X1 is RoHS non-compliant. This upgrade supports modern regulatory requirements and supply chain standards.

Operating Temperature Consideration: The substitute operates across -40°C to 105°C, compared to the original -55°C to 125°C range. Applications requiring operation below -40°C or above 105°C must evaluate this reduced thermal envelope against system requirements.

Contact Geometry Variation: The substitute employs cantilever contact geometry instead of full bellows. Both configurations provide gold-plated contact surfaces and are suitable for 0.156" pitch dual-edge card applications. The cantilever design is standard in modern card edge connector manufacturing.

Availability: The 306-010-520-102 is classified as Active product status with 1059 units in stock, ensuring reliable procurement compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the 306-010-520-102 be used as a direct replacement in existing designs?

A: Yes, provided the application operates within the substitute's temperature range of -40°C to 105°C. The connector maintains identical pitch, position count, mounting configuration, and flange geometry. PCB layout and card edge specifications require no modification.

Q: What is the difference between full bellows and cantilever contact types?

A: Both contact types provide reliable electrical connection for card edge applications. Full bellows contacts use a spring-loaded bellows mechanism, while cantilever contacts employ a cantilevered spring arm. The cantilever design in the 306-010-520-102 is functionally equivalent for this connector category and is the current manufacturing standard.

Q: Does the RoHS3 compliance of the substitute affect compatibility?

A: No. RoHS3 compliance is a material composition standard that does not affect electrical or mechanical performance. The upgrade to RoHS3 compliance is beneficial for regulatory adherence and supply chain compatibility with modern manufacturing environments.

Q: What is the significance of the card thickness range difference?

A: The original EB72S-SB104X1 accommodates cards from 0.054" to 0.071" (1.37mm to 1.80mm). The substitute 306-010-520-102 accommodates 0.054" to 0.070" (1.37mm to 1.78mm). This represents a 0.001" (0.02mm) reduction at the upper limit. Cards within 0.054" to 0.070" thickness are fully compatible with both connectors.

Q: Are there any soldering or assembly differences?

A: No. Both connectors use identical solder termination methods and through-hole mounting. Standard PCB assembly processes apply without modification.

Q: What inventory considerations should be evaluated?

A: The EB72S-SB104X1 is obsolete with limited remaining stock. The 306-010-520-102 is an active product with 1059 units currently available, supporting both immediate procurement and long-term supply chain planning.