M20-9733746 Equivalent & Substitute Parts

Part Overview

The M20-9733746 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole mounting applications. This 37-position, single-row header operates at 0.100" (2.54mm) pitch and supports 3A per contact with an operating temperature range of -40°C to 105°C. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9733746
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Number of Positions	37
Number of Rows	1
Pitch - Mating	0.100" (2.54mm)
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the M20-9733746 is determined by strict equivalence across the following critical parameters:

Connector Configuration: 37 positions, single row, 0.100" (2.54mm) pitch
Contact Specifications: Male pin, square contact shape, brass material with tin finish
Electrical Performance: 3A per contact current rating
Mounting & Termination: Through-hole solder termination
Environmental Compliance: UL94 V-0 flammability rating, ROHS3 compliance, MSL 1

The substitute part 890-80-037-10-002101 from Preci-Dip meets all critical substitution criteria. While the substitute exhibits an extended operating temperature range (-55°C to 125°C) and higher voltage rating (150VDC), these represent performance enhancements rather than deviations from the original specification. Minor variations in contact post length (0.118" vs. 0.122") and overall contact length (0.494" vs. 0.496") fall within acceptable mechanical tolerances for board-to-board connector applications.

Parameter Comparison

Parameter	M20-9733746 (Harwin)	890-80-037-10-002101 (Preci-Dip)
Number of Positions	37	37
Number of Rows	1	1
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Contact Type	Male Pin	Male Pin
Contact Shape	Square	Square
Contact Material	Brass	Brass
Contact Finish - Mating	Tin	Tin
Contact Finish - Post	Tin	Tin
Contact Length - Mating	0.276" (7.00mm)	0.276" (7.00mm)
Contact Length - Post	0.122" (3.10mm)	0.118" (3.00mm)
Overall Contact Length	0.496" (12.60mm)	0.494" (12.54mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Current Rating	3A per Contact	3A
Operating Temperature	-40°C ~ 105°C	-55°C ~ 125°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
Product Status	Obsolete	Active

Engineering Selection Recommendations

The 890-80-037-10-002101 from Preci-Dip is the qualified substitute for the obsolete M20-9733746. Both parts maintain identical electrical and mechanical specifications for the 37-position, 2.54mm pitch connector interface. The substitute part carries active product status, ensuring long-term availability and supply chain continuity.

Both parts satisfy ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The UL94 V-0 flammability rating is maintained across both options. The substitute's extended operating temperature range (-55°C to 125°C versus -40°C to 105°C) and voltage rating specification (150VDC) provide additional performance margin without introducing incompatibility.

Contact post length variation (0.118" versus 0.122") represents a 0.004" (0.10mm) difference within standard PCB through-hole tolerance specifications and does not affect functional compatibility in standard board-to-board applications.

Frequently Asked Questions (FAQ)

Q: Can the 890-80-037-10-002101 be used as a direct replacement for the M20-9733746?

A: Yes. Both connectors share identical pitch (0.100" / 2.54mm), position count (37), contact configuration (male pin, square brass with tin finish), and current rating (3A per contact). The substitute maintains equivalent electrical and mechanical performance for board-to-board solder-terminated applications.

Q: What is the significance of the contact post length difference?

A: The contact post length varies by 0.004" (0.10mm). This difference falls within standard PCB through-hole tolerance ranges and does not affect insertion or retention characteristics in typical applications.

Q: Are there temperature or voltage limitations when substituting?

A: The substitute part operates across a wider temperature range (-55°C to 125°C) and includes a specified voltage rating (150VDC). These represent performance enhancements. If the original application operates within -40°C to 105°C, the substitute remains fully compatible.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the M20-9733746 and 890-80-037-10-002101 are ROHS3 compliant, REACH unaffected, and carry UL94 V-0 flammability ratings. Moisture sensitivity level is MSL 1 (unlimited) for both parts.

Q: What is the primary reason for substitution?

A: The M20-9733746 is classified as obsolete. The 890-80-037-10-002101 is an active product from Preci-Dip, ensuring continued availability and supply chain support for new designs and production requirements.

Q: Are there packaging differences between the two parts?

A: The M20-9733746 packaging information is not specified in the original documentation. The 890-80-037-10-002101 is supplied in bulk packaging. Confirm packaging requirements with your procurement department for order specifications.

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