Harwin M20-9712945 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9712945 is a rectangular connector header with right-angle mounting, 29 positions, and 0.100" (2.54mm) pitch. This through-hole component features male pins with gold-plated brass contacts rated for 3A per contact and operates across -40°C to 105°C. The part is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Header, Right Angle
Contact Type	Male Pin
Number of Positions	29
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Contact Finish - Mating	Gold
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the M20-9712945 is determined by the following critical parameters:

Connector type: Header with right-angle mounting
Contact configuration: Male pin, 29 positions, single row
Pitch specification: 0.100" (2.54mm) mating pitch
Mounting method: Through-hole solder termination
Electrical performance: 3A current rating capability
Environmental compliance: UL94 V-0 flammability rating and ROHS3 compliance

The three substitute parts listed below meet these core requirements. Variations in contact finish (tin vs. gold), insulation height tolerance, and operating temperature range represent acceptable engineering trade-offs within the 2.54mm pitch header category.

Parameter Comparison

Parameter	Harwin M20-9712945	Molex 0022288290	Molex 0022288292	Preci-Dip 890-70-029-20-002101
Manufacturer	Harwin Inc.	Molex	Molex	Preci-Dip
Product Status	Obsolete	Active	Active	Active
Connector Type	Header, Cuttable	Header, Breakaway	Header, Breakaway	Header
Number of Positions	29	29	29	29
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Termination	Solder	Solder	Solder	Solder
Contact Finish - Mating	Gold	Tin	Gold	Gold
Contact Length - Mating	0.276" (7.00mm)	0.244" (6.20mm)	0.244" (6.20mm)	0.276" (7.00mm)
Contact Length - Post	0.118" (3.00mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.118" (3.00mm)
Insulation Height	0.100" (2.54mm)	0.098" (2.50mm)	0.098" (2.50mm)	0.100" (2.54mm)
Contact Shape	Square	Square	Square	Square
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	Black	Black	Black	Black
Current Rating	3A per Contact	Not specified	Not specified	3A
Operating Temperature	-40°C ~ 105°C	Not specified	Not specified	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All three substitute parts are active products with ROHS3 compliance and UL94 V-0 flammability certification, meeting the regulatory requirements of the obsolete Harwin M20-9712945.

Molex 0022288290 and Molex 0022288292 are functionally equivalent Molex KK254 series headers with identical 29-position, 2.54mm pitch configurations. The primary distinction between these two Molex options is contact finish: 0022288290 features tin plating on mating contacts, while 0022288292 provides gold plating. Both employ glass-filled nylon insulation and are available in active production status with high inventory levels.

Preci-Dip 890-70-029-20-002101 offers dimensional and material alignment closest to the original Harwin part, with matching contact length specifications (0.276" mating, 0.118" post) and identical insulation height (0.100"). This part features gold plating on both mating and post contacts and supports an extended operating temperature range of -55°C to 125°C compared to the original -40°C to 105°C specification.

Selection between these substitutes depends on design requirements for contact finish preference, temperature operating envelope, and supplier availability.

Frequently Asked Questions (FAQ)

Q: Can Molex 0022288290 and 0022288292 be used interchangeably with the Harwin M20-9712945?

A: Both Molex parts share the same 29-position, 2.54mm pitch header configuration and through-hole right-angle mounting. The primary difference is contact finish (tin vs. gold). Compatibility depends on your application's contact resistance and corrosion requirements. Both parts meet the same UL94 V-0 and ROHS3 compliance standards.

Q: What is the significance of the contact finish difference between the Molex substitutes?

A: Molex 0022288290 uses tin plating, while 0022288292 uses gold plating. Gold-plated contacts (0022288292) typically provide superior corrosion resistance and lower contact resistance in low-current applications. Tin plating (0022288290) is suitable for general-purpose applications with adequate current levels.

Q: How does the Preci-Dip 890-70-029-20-002101 differ from the Molex options?

A: The Preci-Dip part maintains the original Harwin contact length dimensions (0.276" mating, 0.118" post) and insulation height (0.100"), whereas both Molex parts have slightly reduced contact lengths (0.244" mating, 0.120" post) and insulation height (0.098"). The Preci-Dip part also supports a wider operating temperature range (-55°C to 125°C vs. the original -40°C to 105°C).

Q: Are all substitute parts available in the same packaging format?

A: All three substitute parts are supplied in bulk packaging. Inventory availability varies: Molex 0022288290 (776 pcs), Molex 0022288292 (829 pcs), and Preci-Dip 890-70-029-20-002101 (729 pcs) are currently in stock.

Q: Do the substitute parts maintain the 3A per contact current rating?

A: The Preci-Dip 890-70-029-20-002101 explicitly specifies 3A current rating. The Molex parts do not provide current rating specifications in the available data. For applications requiring confirmed 3A per contact capability, the Preci-Dip part provides explicit electrical rating alignment with the original Harwin specification.

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