M50-4304445 Equivalent & Substitute Parts

Part Overview

The M50-4304445 is an 88-position receptacle connector from Harwin Inc.'s Archer M50 series, designed for board-to-board applications with 0.050" (1.27mm) pitch spacing and surface mount termination. This connector features gold-plated contacts, push-pull fastening, and is rated for 1A per contact with an operating temperature range of -40°C to 105°C. The product is currently obsolete, making equivalent or substitute components necessary for ongoing system support and new design implementations.

Substiute Parts

M50-4304445

Harwin Inc.In Stock: 761M50-4304445 Datasheet

Current PartRFQ

M50-4302545

Harwin Inc.In Stock: 1063M50-4302545 Datasheet

MFR RecommendedRFQ

SFM-144-02-S-D-A

Samtec Inc.In Stock: 931SFM-144-02-S-D-A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the M50-4304445 is determined by the following critical parameters:

Primary Substitution Criteria:

• Connector type (Receptacle)
• Number of positions (88)
• Pitch spacing (0.050" / 1.27mm)
• Number of rows (2)
• Row spacing (0.050" / 1.27mm)
• Mounting type (Surface Mount)
• Contact type (Female Socket)
• Fastening type (Push-Pull)
• Insulation material (Liquid Crystal Polymer)

Secondary Compatibility Parameters:

• Contact finish (Gold mating surface)
• Operating temperature range
• Current rating capability
• Flammability rating (UL94 V-0)
• RoHS compliance status

Two substitute parts are identified:

1. SFM-144-02-S-D-A (Samtec Inc.) - Direct functional equivalent with identical position count, pitch, and row configuration. Active product status with enhanced specifications.

2. M50-4302545 (Harwin Inc.) - Same series alternative with reduced position count (50 vs. 88), suitable only for applications where lower position density is acceptable.

Parameter Comparison

Engineering Selection Recommendations

SFM-144-02-S-D-A (Samtec Inc., Tiger Eye™ SFM Series)

This connector is the primary substitute for the M50-4304445. It maintains identical electrical and mechanical specifications for position count, pitch, row configuration, and contact type. The SFM-144-02-S-D-A is an active product with current manufacturing support, ROHS3 compliance, and MSL 1 rating. Enhanced specifications include higher current rating (3.2A per contact vs. 1A), extended operating temperature range (-55°C to 125°C vs. -40°C to 105°C), and specified voltage rating (250VAC). These improvements provide design margin for demanding applications while maintaining full backward compatibility with the original connector footprint and mating interface.

M50-4302545 (Harwin Inc., Archer M50 Series)

This connector is an alternative within the same manufacturer series, offering active product status and current inventory. However, it is limited to 50 positions compared to the 88-position requirement of the original part. This substitute is applicable only for applications where connector density can be reduced or where multiple connectors can be used in parallel to achieve the required pin count. Electrical and thermal specifications remain equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can SFM-144-02-S-D-A directly replace M50-4304445 without PCB redesign?

A: Yes. Both connectors share identical pitch (0.050"), row count (2), row spacing (0.050"), mounting type (surface mount), and contact configuration (88 positions, female socket, push-pull fastening). The footprint and mating interface are compatible. The SFM-144-02-S-D-A is a direct functional equivalent.

Q: What are the key differences between SFM-144-02-S-D-A and M50-4304445?

A: The primary differences are product status (active vs. obsolete), current rating (3.2A vs. 1A per contact), operating temperature range (-55°C to 125°C vs. -40°C to 105°C), and contact material (beryllium copper vs. phosphor bronze). The SFM-144-02-S-D-A provides enhanced electrical performance and wider environmental operating range.

Q: Is M50-4302545 a suitable replacement?

A: M50-4302545 is suitable only if your application can accommodate a 50-position connector instead of 88 positions. All other electrical and mechanical parameters are equivalent. This part is not a direct replacement but an alternative within the same series.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both SFM-144-02-S-D-A and M50-4302545 are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), matching the compliance profile of the original M50-4304445.

Q: What is the voltage rating difference between the main part and SFM-144-02-S-D-A?

A: The M50-4304445 does not specify a voltage rating in the provided data. The SFM-144-02-S-D-A specifies 250VAC. This additional specification in the substitute part provides defined voltage handling capability for applications requiring voltage rating documentation.

Q: Can these connectors be used interchangeably in existing assemblies?

A: SFM-144-02-S-D-A can be used as a direct replacement in existing M50-4304445 assemblies without modification. M50-4302545 requires design consideration due to reduced position count and is not interchangeable without application-specific evaluation.