M50-3113442 Equivalent & Substitute Parts

Part Overview

The M50-3113442 is a 68-position receptacle connector manufactured by Harwin Inc. as part of the Archer M50 series. This surface mount connector features 0.050" (1.27mm) pitch, gold-plated mating contacts, and push-pull fastening for board-to-board or cable applications. The product is classified as obsolete, making equivalent substitute parts necessary for ongoing design support, maintenance, and production continuity in general purpose, medical, and telecommunications applications.

Substiute Parts

M50-3113442

Harwin Inc.In Stock: 771M50-3113442 Datasheet

Current PartRFQ

LPPB342NFSP-RC

Sullins Connector SolutionsIn Stock: 1044LPPB342NFSP-RC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M50-3113442 is determined by strict equivalence across the following critical parameters:

• Position Count & Pitch: 68 positions at 0.050" (1.27mm) mating pitch and 0.050" (1.27mm) row spacing
• Mounting & Termination: Surface mount with solder termination
• Contact System: Female socket contacts with gold mating finish and phosphor bronze material
• Electrical Performance: 1A current rating
• Environmental Compliance: UL94 V-0 flammability rating and ROHS3 compliance
• Fastening Mechanism: Push-pull fastening system
• Temperature Range: Operating capability within -40°C to 105°C minimum

The LPPB342NFSP-RC from Sullins Connector Solutions meets these core substitution criteria. Variations in insulation material (LCP vs. PA6T), contact finish post composition, and insulation height fall within acceptable engineering tolerances for this connector category and do not prevent functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The LPPB342NFSP-RC is a qualified substitute for the M50-3113442 based on the following engineering criteria:

Compliance & Certification: Both connectors maintain UL94 V-0 flammability rating and ROHS3 compliance, ensuring regulatory equivalence for medical and telecommunications applications.

Electrical & Mechanical Compatibility: Identical position count, pitch, row spacing, current rating, and fastening mechanism ensure direct functional replacement in board-to-board configurations.

Product Lifecycle: The LPPB342NFSP-RC carries active product status, providing long-term availability and supply chain stability compared to the obsolete M50-3113442.

Temperature Performance: The substitute part supports an extended operating temperature range (-40°C ~ 125°C) that encompasses the original specification (-40°C ~ 105°C), providing additional thermal margin.

Physical Considerations: Insulation height variation (0.169" vs. 0.183") and insulation material difference (PA6T vs. LCP) are within acceptable tolerances for this connector class and do not compromise mechanical fit or electrical performance in standard board-to-board applications.

Frequently Asked Questions (FAQ)

Q: Can the LPPB342NFSP-RC directly replace the M50-3113442 in existing designs?

A: Yes. Both connectors share identical position count (68), mating pitch (0.050"), row spacing (0.050"), current rating (1A), fastening type (push-pull), and contact finish (gold). Surface mount termination and solder attachment are equivalent. The substitute maintains all critical electrical and mechanical parameters required for functional equivalence.

Q: What is the difference between "Receptacle" and "Header, Top or Bottom Entry" connector types?

A: The M50-3113442 is classified as a receptacle (socket connector), while the LPPB342NFSP-RC is a header with top or bottom entry capability. Both are female socket contact connectors designed for board-to-board mating. The functional difference lies in mating interface orientation and entry direction, not in electrical performance or contact compatibility.

Q: Does the insulation material change from PA6T to LCP affect performance?

A: No. Liquid Crystal Polymer (LCP) is a high-performance engineering thermoplastic that meets or exceeds the mechanical and thermal properties of PA6T (polyamide 6T). Both materials achieve UL94 V-0 flammability rating. LCP provides superior dimensional stability and moisture resistance, making it suitable for the same applications.

Q: Why is the operating temperature range different?

A: The LPPB342NFSP-RC supports -40°C ~ 125°C, while the M50-3113442 is rated to -40°C ~ 105°C. The substitute part's extended upper temperature limit provides additional thermal margin and does not create incompatibility. Designs operating within the original -40°C ~ 105°C specification remain fully compatible.

Q: Are there packaging differences between these connectors?

A: The M50-3113442 packaging is not specified in the original documentation. The LPPB342NFSP-RC is supplied in tube packaging. Verify packaging requirements for your procurement and assembly processes.

Q: Do both connectors meet medical and telecommunications application requirements?

A: The M50-3113442 is documented for general purpose, medical, and telecommunications applications. The LPPB342NFSP-RC maintains ROHS3 compliance and UL94 V-0 certification, meeting the same regulatory standards. Application-specific qualification should follow your organization's component approval procedures.