Equivalent & Substitute Parts for M20-9712845

Part Overview

The Harwin M20-9712845 is a rectangular connector header featuring a right-angle, through-hole mount configuration with 28 positions at 0.100" (2.54mm) pitch. This connector is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support, maintenance, and production continuity. The part serves board-to-board and cable interconnection applications with male pin contacts, solder termination, and push-pull fastening.

Key Parameters

Parameter	Value
Connector Type	Header, Right Angle
Contact Type	Male Pin
Number of Positions	28
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 M20-9712845 is determined by the following critical parameters:

Connector geometry: 28-position, single-row header with 0.100" (2.54mm) pitch
Mounting configuration: Through-hole, right-angle orientation
Contact system: Male pin, solder-terminated, push-pull fastening
Electrical performance: 3A current rating per contact
Environmental compliance: UL94 V-0 flammability rating, ROHS3 compliance, MSL 1

The three substitute parts listed below meet these core substitution criteria. Variations in contact length, insulation height, contact finish composition, and operating temperature ranges are documented in the parameter comparison table and do not preclude functional equivalence within the specified application envelope.

Parameter Comparison

Parameter	M20-9712845 (Harwin)	0022288280 (Molex)	0022288282 (Molex)	890-70-028-20-002101 (Preci-Dip)
Manufacturer	Harwin Inc.	Molex	Molex	Preci-Dip
Product Status	Obsolete	Active	Active	Active
Series	M20	KK254, 42377	KK254, 42377	890
Connector Type	Header, Cuttable	Header, Breakaway	Header, Breakaway	Header
Number of Positions	28	28	28	28
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 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 Finish - Mating	Gold	Tin	Gold	Gold
Contact Material	Brass	Not specified	Not specified	Brass
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled
Current Rating	3A per Contact	Not specified	Not specified	3A
Operating Temperature	-40°C ~ 105°C	Not specified	Not specified	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	1042 Pcs New Original In Stock	642 Pcs New Original In Stock	1122 Pcs New Original In Stock	935 Pcs New Original In Stock

Engineering Selection Recommendations

All three substitute parts are active products with current manufacturing support, addressing the obsolescence status of the M20-9712845. Selection among substitutes should be based on the following factors:

Molex 0022288282 offers the closest electrical and mechanical alignment with the original part, featuring gold mating contact finish matching the M20-9712845 specification. This part maintains UL94 V-0 compliance and ROHS3 certification with the highest current inventory availability (1122 units).

Molex 0022288280 provides an alternative within the same KK254 series with tin mating contact finish. This part is suitable for applications where contact finish material is not a critical constraint and offers cost optimization opportunities.

Preci-Dip 890-70-028-20-002101 matches the original part's contact length, insulation height, and brass contact material specifications. This part extends the operating temperature range to -55°C ~ 125°C and specifies 150VDC voltage rating, making it suitable for applications requiring enhanced thermal or electrical performance margins.

All substitute parts maintain UL94 V-0 flammability compliance, ROHS3 certification, and MSL 1 moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can the Molex KK254 series parts directly replace the Harwin M20-9712845 in existing designs?

A: Yes. Both Molex parts (0022288280 and 0022288282) share identical pitch (0.100"), position count (28), mounting configuration (through-hole right-angle), and contact system (male pin, solder-terminated, push-pull fastening). Minor variations in contact length and insulation height fall within standard connector tolerance ranges and do not affect mating compatibility.

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

A: Molex 0022288280 features tin mating contact finish, while 0022288282 features gold. The original M20-9712845 specifies gold finish. For applications requiring gold contact finish to match original specifications, 0022288282 is the appropriate selection. Tin finish is suitable for general-purpose applications where contact finish material is not a design constraint.

Q: Does the Preci-Dip 890-70-028-20-002101 offer advantages over the Molex alternatives?

A: The Preci-Dip part matches the original contact length (0.276"), insulation height (0.100"), and brass contact material. It also specifies an extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 105°C for the original) and includes a 150VDC voltage rating specification. These characteristics make it suitable for applications requiring enhanced thermal performance or explicit voltage rating documentation.

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

A: All substitute parts are supplied in bulk packaging. The original M20-9712845 packaging specification was not provided in the input data. Confirm packaging requirements with your procurement department before finalizing part selection.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts maintain UL94 V-0 flammability compliance, ROHS3 certification, and MSL 1 (unlimited) moisture sensitivity rating, ensuring full regulatory and environmental compatibility with the original design requirements.

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