ASM25DREH Equivalent & Substitute Parts

Part Overview

The ASM25DREH is a 50-position female card edge connector manufactured by Sullins Connector Solutions. This dual-edge connector features a 0.156" (3.96mm) pitch and is designed for panel mount applications with solder eyelet termination. The connector is constructed with beryllium copper contacts finished in gold and operates across a temperature range of -65°C to 150°C. The product maintains active status and is ROHS3 compliant, making it suitable for applications requiring reliable edge card connectivity with extended thermal performance.

Equivalent and substitute parts are identified to provide procurement flexibility, support supply chain continuity, and accommodate specific application requirements such as alternative mounting configurations or packaging preferences.

Substiute Parts

ASM25DREH

Sullins Connector SolutionsIn Stock: 976ASM25DREH Datasheet

Current PartRFQ

307-050-500-202

Mercury United Electronics, Inc.In Stock: 1086307-050-500-202 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 307-050-500-202 manufactured by Mercury United Electronics, Inc. is classified as an equivalent connector based on the following critical parameters:

Matching Parameters:

• 50-position configuration
• 0.156" (3.96mm) pitch spacing
• Female gender
• Dual-edge card type
• 2-row configuration
• Gold contact finish at 10.0µin (0.25µm) thickness
• Solder eyelet termination
• Green insulation color
• ROHS3 compliance
• REACH unaffected status
• EAR99 ECCN classification

Allowable Variations: The 307-050-500-202 substitute differs in the following parameters within acceptable ranges for card edge connector applications:

• Card thickness tolerance: 0.054" ~ 0.070" (1.37mm ~ 1.78mm) versus 0.062" (1.57mm) specification
• Contact material: Copper alloy versus beryllium copper
• Contact type: Semi bellows versus full bellows
• Mounting type: Through hole versus panel mount
• Operating temperature range: -40°C ~ 105°C versus -65°C ~ 150°C
• Insulation material: Polyester thermoplastic versus polyphenylene sulfide (PPS)
• Flange feature: Flush mount configuration versus top mount opening

These variations remain within the functional envelope for dual-edge female card connectors at 0.156" pitch and do not compromise electrical or mechanical compatibility for standard edge card applications.

Parameter Comparison

Engineering Selection Recommendations

Both the ASM25DREH and 307-050-500-202 maintain active product status and satisfy ROHS3 compliance requirements, making them suitable for applications subject to environmental regulations. Both connectors are classified under EAR99 and maintain REACH unaffected status.

Primary Selection Criteria:

The ASM25DREH is the preferred choice for applications requiring:

• Extended operating temperature range (-65°C to 150°C)
• Panel mount configuration
• Full bellows contact design
• Polyphenylene sulfide (PPS) insulation material

The 307-050-500-202 serves as a functional substitute for applications where:

• Through-hole mounting is required
• Operating temperature range of -40°C to 105°C is acceptable
• Semi-bellows contact design meets application requirements
• Polyester thermoplastic insulation is compatible with the application environment

Selection between these parts should be based on specific mounting requirements, thermal operating conditions, and PCB design constraints rather than electrical performance, as both connectors provide equivalent signal integrity at the 0.156" pitch specification.

Frequently Asked Questions (FAQ)

Q: Can the 307-050-500-202 be used as a direct replacement for the ASM25DREH in all applications?

A: The 307-050-500-202 is functionally equivalent for applications operating within -40°C to 105°C. Applications requiring the extended temperature range of -65°C to 150°C must use the ASM25DREH. Additionally, mounting configuration differences (panel mount versus through-hole) must be evaluated against PCB design requirements.

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

A: The ASM25DREH specifies 0.062" (1.57mm) card thickness, while the 307-050-500-202 accepts 0.054" to 0.070" (1.37mm to 1.78mm). The ASM25DREH specification falls within the Mercury part's tolerance range, ensuring mechanical compatibility. However, edge cards designed specifically for the tighter ASM25DREH tolerance may not achieve optimal contact pressure with the 307-050-500-202 if card thickness approaches the lower tolerance limit.

Q: How do the contact materials differ in performance?

A: The ASM25DREH uses beryllium copper contacts, while the 307-050-500-202 uses copper alloy contacts. Both materials are gold-finished at identical thickness (10.0µin). The contact material difference does not affect electrical performance for standard signal applications at 0.156" pitch spacing.

Q: What is the difference between full bellows and semi-bellows contact design?

A: Full bellows contacts (ASM25DREH) provide greater compliance and contact force variation tolerance. Semi-bellows contacts (307-050-500-202) provide reduced compliance but maintain adequate contact force for standard applications. Both designs are suitable for edge card connectors at this pitch specification.

Q: Are there packaging differences between these parts?

A: The ASM25DREH is supplied in tray packaging, while the 307-050-500-202 is supplied in bulk packaging. This difference affects handling and storage procedures but does not impact connector performance or compatibility.

Q: What insulation material should be selected for high-temperature applications?

A: The ASM25DREH with polyphenylene sulfide (PPS) insulation is rated to 150°C and is the appropriate choice for high-temperature applications. The 307-050-500-202 with polyester thermoplastic insulation is rated to 105°C and is not suitable for extended high-temperature operation.

Q: Do both connectors meet current regulatory requirements?

A: Both the ASM25DREH and 307-050-500-202 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components in most jurisdictions.