M50-3124245 Equivalent & Substitute Parts

Part Overview

The M50-3124245 is an 84-position receptacle connector from Harwin Inc.'s Archer M50 series, designed for board-to-board or cable applications with 0.050" (1.27mm) pitch spacing. This connector features surface mount termination, gold-plated contacts, and operates across -40°C to 105°C. The product is currently obsolete, making identification of equivalent and substitute parts essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	M50-3124245
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Receptacle
Number of Positions	84
Pitch - Mating	0.050" (1.27mm)
Number of Rows	2
Row Spacing - Mating	0.050" (1.27mm)
Mounting Type	Surface Mount
Contact Finish - Mating	Gold
Operating Temperature	-40°C ~ 105°C
Current Rating	1A
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the M50-3124245 is determined by the following critical parameters:

Primary Matching Criteria:

Connector type: Receptacle
Contact type: Female socket
Pitch - mating: 0.050" (1.27mm)
Number of rows: 2
Row spacing - mating: 0.050" (1.27mm)
Mounting type: Surface mount
Termination: Solder
Fastening type: Push-pull
Contact finish - mating: Gold
Insulation material: Liquid crystal polymer (LCP)
Contact shape: Square
Contact material: Phosphor bronze

Secondary Compatibility Factors:

Operating temperature range
Current rating per contact
Insulation height
Mated stacking heights
RoHS and REACH compliance status

Two substitute parts meet the primary matching criteria with variations in secondary parameters.

Parameter Comparison

Parameter	M50-3124245 (Main)	M50-3122545 (Substitute)	FLE-142-01-G-DV (Substitute)
Manufacturer	Harwin Inc.	Harwin Inc.	Samtec Inc.
Number of Positions	84	50	84
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Number of Rows	2	2	2
Row Spacing - Mating	0.050" (1.27mm)	0.050" (1.27mm)	0.050" (1.27mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Contact Finish - Mating	Gold (Flash)	Gold (Flash)	Gold (10.0µin / 0.25µm)
Insulation Height	0.142" (3.60mm)	0.142" (3.60mm)	0.172" (4.37mm)
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C
Current Rating	1A	1A	2A per Contact
Mated Stacking Heights	5.5mm, 6.18mm	5.5mm, 6.18mm	Not specified
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

M50-3122545 (Harwin Inc.): This substitute is an active product from the same manufacturer and series as the main part. It maintains identical pitch, row spacing, mounting type, and operating temperature range. The primary difference is position count: 50 positions versus 84 positions. This substitute is applicable only when system requirements permit reduced connector density. Both parts share identical insulation height and mated stacking heights, ensuring mechanical compatibility in existing footprints designed for the M50-3124245.

FLE-142-01-G-DV (Samtec Inc.): This substitute maintains the 84-position configuration and all primary matching criteria. It is an active product with extended operating temperature range (-55°C to 125°C) and higher current rating (2A per contact versus 1A). The insulation height is 0.172" (4.37mm) compared to 0.142" (3.60mm) in the main part, and mated stacking heights are not specified. This substitute provides enhanced thermal and electrical performance but requires verification of mechanical fit in space-constrained applications.

Both substitutes are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching the main part's compliance profile.

Frequently Asked Questions (FAQ)

Q: Can M50-3122545 directly replace M50-3124245 in all applications?

A: M50-3122545 is mechanically and electrically compatible only for applications requiring 50 or fewer positions. The connector maintains identical pitch, row spacing, mounting type, and operating temperature. Direct substitution is not possible for designs requiring all 84 positions.

Q: What are the key differences between FLE-142-01-G-DV and M50-3124245?

A: Both connectors maintain 84 positions, 0.050" pitch, and surface mount configuration. FLE-142-01-G-DV offers extended temperature range (-55°C to 125°C versus -40°C to 105°C), higher current rating (2A per contact versus 1A), and thicker gold plating on mating contacts (10.0µin versus flash). Insulation height differs by 0.030" (0.77mm), requiring mechanical fit verification.

Q: Are both substitutes RoHS compliant?

A: Yes. Both M50-3122545 and FLE-142-01-G-DV are ROHS3 compliant, matching the main part's compliance status.

Q: What is the impact of different insulation heights on PCB design?

A: M50-3124245 and M50-3122545 share 0.142" (3.60mm) insulation height. FLE-142-01-G-DV has 0.172" (4.37mm) insulation height. This 0.030" difference may affect clearance in applications with height constraints or adjacent components. Footprint verification is required before substitution.

Q: Can FLE-142-01-G-DV be used in applications with lower current requirements?

A: Yes. FLE-142-01-G-DV's 2A per contact rating exceeds the 1A requirement of M50-3124245. It is suitable for applications with equal or lower current demands. The higher rating provides design margin without functional impact.

Q: What packaging formats are available for these substitutes?

A: M50-3122545 is supplied in tube packaging. FLE-142-01-G-DV is supplied in bulk packaging. Packaging format may affect procurement, handling, and storage procedures.

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