M50-4804945 Equivalent & Substitute Parts

Part Overview

The M50-4804945 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle board-to-board applications. This 98-position connector operates at 0.050" (1.27mm) pitch with shrouded 4-wall construction and push-pull fastening. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	98
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
Fastening Type	Push-Pull
Termination	Solder
Operating Temperature Range	-40°C ~ 105°C
Current Rating	1A
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the M50-4804945 is determined by strict equivalence across the following critical parameters:

Connector Type & Contact Configuration: Header with male pins
Position Count & Row Configuration: 98 positions in 2-row arrangement
Pitch Specifications: 0.050" (1.27mm) mating pitch and row spacing
Mounting & Orientation: Through-hole, right-angle mounting
Shrouding & Fastening: Shrouded 4-wall construction with push-pull fastening
Electrical & Environmental Ratings: 1A current rating, -40°C to 105°C operating range, UL94 V-0 flammability compliance
Regulatory Compliance: ROHS3 and REACH compliance

The SBH31-NBPB-D49-RA-BK from Sullins Connector Solutions meets all these critical parameters and is designated as the manufacturer-recommended substitute.

Parameter Comparison

Parameter	M50-4804945 (Harwin)	SBH31-NBPB-D49-RA-BK (Sullins)
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Number of Positions	98	98
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
Fastening Type	Push-Pull	Push-Pull
Termination	Solder	Solder
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Contact Finish - Post	Gold	Gold
Insulation Material	Liquid Crystal Polymer (LCP)	Polyamide (PA9T), Nylon 9T
Insulation Color	Black	Black
Operating Temperature Range	-40°C ~ 105°C	-40°C ~ 105°C
Current Rating	1A	1A
Material Flammability Rating	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active

Engineering Selection Recommendations

The SBH31-NBPB-D49-RA-BK is the appropriate substitute for the obsolete M50-4804945. Both connectors maintain identical electrical and mechanical specifications across all critical parameters, including pitch, position count, mounting configuration, and fastening mechanism. The substitute part is currently in active production status with 938 units available in inventory.

Both parts satisfy identical regulatory requirements: ROHS3 compliance, REACH unaffected status, and UL94 V-0 flammability rating. Operating temperature ranges are identical at -40°C to 105°C, and current ratings match at 1A per contact.

The primary difference lies in insulation material composition: the original uses Liquid Crystal Polymer (LCP), while the substitute employs Polyamide (PA9T) Nylon 9T. Both materials meet the same flammability and environmental standards specified for this connector class. Contact post length differs slightly (0.083" versus 0.094"), and insulation height varies marginally (0.222" versus 0.211"), but these dimensional variations remain within acceptable tolerances for board-to-board interconnection applications.

Frequently Asked Questions (FAQ)

Q: Can the SBH31-NBPB-D49-RA-BK directly replace the M50-4804945 in existing designs?

A: Yes. Both connectors share identical mating pitch (0.050"), position count (98), row configuration (2 rows), mounting type (through-hole right-angle), and fastening mechanism (push-pull). Mechanical and electrical compatibility is maintained across all critical parameters.

Q: What is the significance of the insulation material difference between LCP and PA9T Nylon 9T?

A: Both materials meet UL94 V-0 flammability requirements and operate across the identical temperature range (-40°C to 105°C). The material substitution does not affect electrical performance, current rating, or environmental compliance for this connector application.

Q: Are there dimensional considerations when substituting these parts?

A: Minor dimensional variations exist in contact post length (0.083" versus 0.094") and insulation height (0.222" versus 0.211"). These differences are within acceptable tolerances for standard board-to-board interconnection. Verify PCB footprint compatibility if dimensional precision is critical to your application.

Q: What is the packaging difference between these parts?

A: The M50-4804945 packaging specification is not provided. The SBH31-NBPB-D49-RA-BK is supplied in tray packaging. Confirm packaging requirements for your procurement and assembly processes.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the M50-4804945 and SBH31-NBPB-D49-RA-BK are ROHS3 compliant, REACH unaffected, and carry UL94 V-0 material flammability ratings.

Q: Why is the original part listed as obsolete?

A: The M50-4804945 is no longer in active production by Harwin Inc. The SBH31-NBPB-D49-RA-BK from Sullins Connector Solutions is the active equivalent, currently manufactured and stocked.

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