Equivalent & Substitute Parts for M50-4801845

Part Overview

The M50-4801845 is a rectangular connector header manufactured by Harwin Inc., designed for board-to-board applications with 36 positions at 1.27mm pitch. This component features right-angle through-hole mounting, shrouded 4-wall construction, and gold-plated contacts rated for 1A per contact. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	36
Number of Rows	2
Pitch - Mating	0.050" (1.27mm)
Row Spacing - Mating	0.050" (1.27mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Current Rating	1A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the M50-4801845 is determined by strict equivalence across the following critical parameters:

Connector geometry: 36-position, 2-row configuration with 0.050" (1.27mm) pitch and row spacing
Mounting and orientation: Through-hole, right-angle mounting with shrouded 4-wall construction
Electrical performance: 1A per contact current rating and operating temperature range of -40°C to 105°C
Contact configuration: Male pin contacts with gold plating and solder termination
Regulatory compliance: UL94 V-0 flammability rating and ROHS3 compliance

The substitute part SBH31-NBPB-D18-RA-BK from Sullins Connector Solutions meets all these criteria, with minor variations in contact post length and insulation material that do not affect functional compatibility in board-to-board applications.

Parameter Comparison

Parameter	M50-4801845 (Harwin)	SBH31-NBPB-D18-RA-BK (Sullins)
Manufacturer	Harwin Inc.	Sullins Connector Solutions
Product Status	Obsolete	Active
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Number of Positions	36	36
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, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder
Contact Length - Post	0.083" (2.11mm)	0.094" (2.40mm)
Insulation Height	0.222" (5.65mm)	0.211" (5.35mm)
Contact Finish - Mating	Gold	Gold
Contact Finish - Post	Gold	Gold
Contact Material	Copper Alloy	Brass
Insulation Material	Liquid Crystal Polymer (LCP)	Polyamide (PA9T), Nylon 9T
Current Rating	1A per Contact	1A
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The SBH31-NBPB-D18-RA-BK is a direct functional equivalent for the obsolete M50-4801845. Both components maintain identical electrical and mechanical specifications for board-to-board connectivity, with equivalent current ratings, operating temperature ranges, and regulatory compliance certifications. The substitute part carries active product status, ensuring long-term availability and supply chain continuity.

Minor dimensional variations exist in contact post length (0.094" versus 0.083") and insulation height (0.211" versus 0.222"), along with differences in contact material composition (brass versus copper alloy) and insulation material (polyamide versus liquid crystal polymer). These variations remain within acceptable tolerances for standard board-to-board mating applications and do not compromise electrical performance or mechanical fit in typical PCB designs.

Both components are ROHS3 compliant and carry UL94 V-0 flammability ratings, meeting equivalent regulatory requirements for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the SBH31-NBPB-D18-RA-BK directly replace the M50-4801845 in existing designs?

A: Yes. Both connectors share identical pitch (1.27mm), position count (36), row configuration (2), mounting orientation (right-angle through-hole), and shrouding design (4-wall). Electrical ratings and operating temperature ranges are equivalent. Minor dimensional differences in contact post length and insulation height do not affect standard board-to-board mating compatibility.

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

A: The primary differences are product status (obsolete versus active), contact material (copper alloy versus brass), insulation material (LCP versus polyamide), and minor dimensional variations in post length and insulation height. These differences do not impact functional performance in board-to-board applications.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the M50-4801845 and SBH31-NBPB-D18-RA-BK are ROHS3 compliant, carry UL94 V-0 flammability ratings, and have MSL 1 (Unlimited) moisture sensitivity levels. Both are classified as EAR99 for export control purposes.

Q: What is the significance of the product status difference?

A: The M50-4801845 is classified as obsolete, indicating discontinued manufacturing and limited availability. The SBH31-NBPB-D18-RA-BK maintains active product status, ensuring ongoing manufacturing support, documented supply chain availability, and long-term design continuity for new and legacy applications.

Q: Are there packaging differences between these parts?

A: The M50-4801845 packaging specification is not provided. The SBH31-NBPB-D18-RA-BK is supplied in tray packaging. Confirm packaging requirements with your procurement specifications before component selection.

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