M50-4302645 Equivalent & Substitute Parts

Part Overview

The M50-4302645 is a 52-position receptacle connector manufactured by Harwin Inc. as part of the Archer M50 series. This board-to-board connector features 0.050" (1.27mm) pitch, surface mount termination, and gold-plated contacts rated for 1A per contact. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

M50-4302645

Harwin Inc.In Stock: 1192M50-4302645 Datasheet

Current PartRFQ

SFM-126-02-L-D-A

Samtec Inc.In Stock: 998SFM-126-02-L-D-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SFM-126-02-L-D-A (Samtec Inc., Tiger Eye™ SFM series) qualifies as a functional equivalent based on the following critical parameters:

Matching Parameters:

• Connector type: Receptacle
• Number of positions: 52
• Pitch - mating: 0.050" (1.27mm)
• Number of rows: 2
• Row spacing - mating: 0.050" (1.27mm)
• Mounting type: Surface Mount
• Fastening type: Push-Pull
• Contact finish - mating: Gold
• Insulation material: Liquid Crystal Polymer (LCP)
• Contact shape: Square
• Material flammability rating: UL94 V-0
• RoHS status: ROHS3 Compliant
• Moisture sensitivity level: 1 (Unlimited)

These parameters define the mechanical and electrical interface compatibility necessary for direct substitution in board-to-board applications.

Parameter Comparison

Engineering Selection Recommendations

The SFM-126-02-L-D-A is suitable as a substitute for the obsolete M50-4302645 based on mechanical and electrical interface compatibility. Both connectors maintain identical pitch, row configuration, contact geometry, and insulation material specifications required for board-to-board mating.

The substitute part offers enhanced performance characteristics: extended operating temperature range (-55°C to 125°C versus -40°C to 105°C), higher current rating (3.2A per contact versus 1A per contact), and specified voltage rating (250VAC). Both parts maintain ROHS3 compliance and UL94 V-0 flammability rating.

The SFM-126-02-L-D-A is currently in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete M50-4302645.

Frequently Asked Questions (FAQ)

Q: What makes the SFM-126-02-L-D-A a valid substitute for the M50-4302645?

A: Both connectors share identical critical interface parameters: 52-position receptacle configuration, 0.050" (1.27mm) pitch, 2-row layout with 0.050" row spacing, surface mount termination, push-pull fastening, gold-plated mating contacts, and LCP insulation. These parameters define mechanical and electrical compatibility for board-to-board applications.

Q: Are there physical dimension differences between these connectors?

A: Insulation height differs slightly: M50-4302645 measures 0.181" (4.60mm) while SFM-126-02-L-D-A measures 0.185" (4.70mm). Mated stacking heights also differ, with the substitute offering multiple stacking height options. These variations require verification against specific PCB layout and mechanical envelope constraints.

Q: What are the performance advantages of the substitute part?

A: The SFM-126-02-L-D-A provides higher current capacity (3.2A per contact versus 1A), extended operating temperature range (-55°C to 125°C versus -40°C to 105°C), and specified voltage rating (250VAC). These enhancements support applications with higher power requirements or more demanding thermal environments.

Q: Are both parts RoHS and regulatory compliant?

A: Both the M50-4302645 and SFM-126-02-L-D-A are ROHS3 compliant with UL94 V-0 flammability rating and MSL 1 (Unlimited) moisture sensitivity level, meeting equivalent regulatory requirements.

Q: What is the availability status of each part?

A: The M50-4302645 is obsolete with limited remaining inventory (1130 pcs). The SFM-126-02-L-D-A is in active production status with current inventory availability (948 pcs), ensuring ongoing supply chain access for new designs and maintenance applications.