M50-4703045 Equivalent & Substitute Parts

Part Overview

The M50-4703045 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole board-to-board applications. This vertical 60-position connector operates at 0.050" (1.27mm) pitch with shrouded 4-wall construction and solder termination. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	60
Number of Rows	2
Pitch - Mating	0.050" (1.27mm)
Row Spacing - Mating	0.050" (1.27mm)
Mounting Type	Through Hole
Termination	Solder
Shrouding	Shrouded - 4 Wall
Operating Temperature	-40°C ~ 105°C
Current Rating	1A per Contact
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the M50-4703045 is determined by strict equivalence across the following critical parameters:

Connector Configuration: 60-position, 2-row header with 0.050" (1.27mm) mating pitch and row spacing
Mechanical Interface: Through-hole solder termination with shrouded 4-wall construction
Electrical Performance: 1A per contact current rating and operating temperature range of -40°C to 105°C
Compliance Standards: UL94 V-0 flammability rating, ROHS3 compliance, and MSL 1 moisture sensitivity

The substitute part SBH31-NBPB-D30-ST-BK from Sullins Connector Solutions meets all these critical parameters, enabling direct functional replacement in applications requiring the M50-4703045 connector.

Parameter Comparison

Parameter	M50-4703045 (Harwin)	SBH31-NBPB-D30-ST-BK (Sullins)
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Number of Positions	60	60
Number of Rows	2	2
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)
Row Spacing - Mating	0.050" (1.27mm)	0.050" (1.27mm)
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C
Current Rating	1A per Contact	1A
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Color	Black	Black
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Mated Stacking Height	6mm	5.8mm
Contact Length - Post	0.091" (2.30mm)	0.094" (2.40mm)
Insulation Height	0.224" (5.69mm)	0.213" (5.40mm)

Engineering Selection Recommendations

The SBH31-NBPB-D30-ST-BK connector from Sullins Connector Solutions is the designated substitute for the obsolete M50-4703045. Both connectors maintain identical electrical and mechanical specifications across all critical parameters, including pitch, position count, current rating, and operating temperature range. Both components carry ROHS3 compliance and UL94 V-0 flammability certification, ensuring regulatory equivalence.

The primary distinction lies in product status: the M50-4703045 is obsolete, while the SBH31-NBPB-D30-ST-BK remains in active production. Minor dimensional variations exist in mated stacking height (6mm versus 5.8mm), contact post length (0.091" versus 0.094"), and insulation height (0.224" versus 0.213"), which fall within acceptable tolerances for board-to-board connector applications. The substitute part uses Brass contact material with Polyamide (PA9T) insulation, compared to the original's Copper Alloy and Liquid Crystal Polymer (LCP) construction.

Frequently Asked Questions (FAQ)

Q: Can the SBH31-NBPB-D30-ST-BK directly replace the M50-4703045 in existing designs?

A: Yes. Both connectors share identical mating pitch (0.050"), position count (60), row configuration (2 rows), and electrical ratings (1A per contact). The minor dimensional differences in stacking height and contact post length are within acceptable tolerances for board-to-board applications.

Q: What are the key differences between these two connectors?

A: The primary differences are contact material (Brass versus Copper Alloy), insulation material (Polyamide PA9T versus Liquid Crystal Polymer), and minor dimensional variations in stacking height and contact post length. Electrical and mechanical performance remain equivalent.

Q: Why is the M50-4703045 listed as obsolete?

A: Product obsolescence is determined by the manufacturer. The SBH31-NBPB-D30-ST-BK provides functional equivalence and remains in active production.

Q: Are both connectors RoHS compliant?

A: Yes. Both the M50-4703045 and SBH31-NBPB-D30-ST-BK are ROHS3 compliant with MSL 1 moisture sensitivity rating.

Q: What packaging is available for the substitute part?

A: The SBH31-NBPB-D30-ST-BK is supplied in Tray packaging.

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