Harwin M50-4904245 Equivalent & Substitute Parts

Part Overview

The Harwin M50-4904245 is a surface mount rectangular connector header with 84 positions at 1.27mm pitch, designed for board-to-board applications. This component features shrouded 4-wall construction, solder termination, and push-pull fastening. The product is classified as obsolete, making identification of compatible substitute parts essential for ongoing production support and design continuity.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.050" (1.27mm)
Number of Positions	84
Number of Rows	2
Row Spacing - Mating	0.050" (1.27mm)
Mounting Type	Surface Mount
Style	Board to Board
Shrouding	Shrouded - 4 Wall
Termination	Solder
Fastening Type	Push-Pull
Current Rating	1A
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the M50-4904245 is determined by strict alignment of the following critical parameters:

Connector type (Header)
Contact type (Male Pin)
Mating pitch (0.050" / 1.27mm)
Position count (84)
Row configuration (2 rows)
Row spacing (0.050" / 1.27mm)
Mounting method (Surface Mount)
Board-to-board style
Shrouding configuration (Shrouded - 4 Wall)
Termination method (Solder)
Fastening mechanism (Push-Pull)
Current rating (1A)
Operating temperature range (-40°C ~ 105°C)
Flammability compliance (UL94 V-0)
RoHS compliance (ROHS3)

The Sullins Connector Solutions SBH31-NBPB-D42-SM-BK meets all critical substitution criteria and is classified as an active product, providing long-term availability for replacement applications.

Parameter Comparison

Parameter	Harwin M50-4904245	Sullins SBH31-NBPB-D42-SM-BK
Manufacturer	Harwin Inc.	Sullins Connector Solutions
Product Status	Obsolete	Active
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)
Number of Positions	84	84
Number of Rows	2	2
Row Spacing - Mating	0.050" (1.27mm)	0.050" (1.27mm)
Mounting Type	Surface Mount	Surface Mount
Style	Board to Board	Board to Board
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Insulation Height	0.224" (5.69mm)	0.213" (5.40mm)
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Contact Material	Copper Alloy	Brass
Insulation Material	Liquid Crystal Polymer (LCP)	Polyamide (PA9T), Nylon 9T
Current Rating	1A	1A
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C
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)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

The Sullins SBH31-NBPB-D42-SM-BK is a direct functional equivalent to the obsolete Harwin M50-4904245. Both components share identical electrical and mechanical specifications across all critical parameters, including pitch, position count, row configuration, current rating, and operating temperature range.

The Sullins part offers the advantage of active product status, ensuring continued availability and supply chain stability. Both components maintain ROHS3 compliance and UL94 V-0 flammability certification, meeting regulatory requirements for equivalent applications.

Minor variations exist in insulation material composition (LCP versus PA9T Nylon 9T) and contact material (Copper Alloy versus Brass), with the Sullins part featuring a slightly reduced insulation height of 0.213" compared to 0.224" for the Harwin original. These material differences do not affect functional compatibility for board-to-board connector applications within the specified electrical and thermal parameters.

Frequently Asked Questions (FAQ)

Q: Can the Sullins SBH31-NBPB-D42-SM-BK be used as a direct replacement for the Harwin M50-4904245?

A: Yes. Both components share identical pitch (1.27mm), position count (84), row configuration (2 rows), mounting type (surface mount), shrouding (4-wall), termination (solder), and fastening mechanism (push-pull). Electrical ratings and operating temperature ranges are equivalent.

Q: What is the difference in insulation height between these parts?

A: The Harwin M50-4904245 has an insulation height of 0.224" (5.69mm), while the Sullins SBH31-NBPB-D42-SM-BK measures 0.213" (5.40mm). This 0.011" difference is within typical PCB design tolerances for board-to-board connector applications and does not affect functional compatibility.

Q: Are there material differences between the two connectors?

A: The Harwin part uses Copper Alloy contacts with Liquid Crystal Polymer (LCP) insulation, while the Sullins part uses Brass contacts with Polyamide (PA9T) Nylon 9T insulation. Both materials meet UL94 V-0 flammability requirements and maintain equivalent electrical performance within the specified 1A current rating and -40°C to 105°C operating temperature range.

Q: What is the packaging format for the Sullins substitute?

A: The Sullins SBH31-NBPB-D42-SM-BK is supplied in tube packaging, compared to the original Harwin part which does not specify packaging format in the available data.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the Harwin M50-4904245 and Sullins SBH31-NBPB-D42-SM-BK are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory standards for equivalent applications.

Q: Why is the Harwin part classified as obsolete?

A: Product obsolescence typically results from manufacturer discontinuation decisions. The Sullins SBH31-NBPB-D42-SM-BK maintains active product status, providing long-term supply availability for applications requiring this connector configuration.

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