M20-9712145 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9712145 is a rectangular connector header featuring a right-angle, through-hole mount configuration with 21 positions at 0.100" (2.54mm) pitch. This connector is designed for board-to-board or cable applications with unshrouded, male pin contacts and solder termination. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and electrical compatibility for ongoing production and field replacement requirements.

Key Parameters

Parameter	Value
Connector Type	Header, Right Angle
Contact Type	Male Pin
Number of Positions	21
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 M20-9712145 is determined by the following critical parameters:

Connector type and form factor: Header, right-angle, through-hole mount
Electrical interface: 21-position, 0.100" (2.54mm) pitch, male pin contacts
Termination method: Solder
Fastening mechanism: Push-pull
Compliance standards: UL94 V-0 flammability rating, ROHS3 compliance
Contact material and finish: Gold-plated mating surface for corrosion resistance
Current capacity: 3A per contact minimum

The three substitute parts identified—Molex 0022288210, Molex 0022288212, and Preci-Dip 890-70-021-20-002101—satisfy these core substitution criteria. All three maintain the same pitch, position count, mounting configuration, and termination method. Variations in contact finish thickness, insulation material composition, and operating temperature ranges represent acceptable engineering tolerances within the rectangular connector category.

Parameter Comparison

Parameter	M20-9712145 (Harwin)	0022288210 (Molex)	0022288212 (Molex)	890-70-021-20-002101 (Preci-Dip)
Connector Type	Header, Cuttable	Header, Breakaway	Header, Breakaway	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	21	21	21	21
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
Termination	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull
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
Contact Finish - Mating	Gold	Tin	Gold	Gold
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)
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts are active products with current manufacturing support, addressing the obsolescence status of the M20-9712145. Selection among the substitutes is based on specific application requirements:

Molex 0022288210 provides a tin-plated mating contact finish alternative. This part maintains full electrical and mechanical compatibility with the original specification while offering cost optimization for applications where gold plating is not required.

Molex 0022288212 maintains gold-plated mating contacts matching the original M20-9712145 specification. This part is recommended for applications requiring corrosion resistance equivalent to the original design. Contact finish thickness is specified at 15.0µin (0.38µm) on the mating surface.

Preci-Dip 890-70-021-20-002101 provides the closest dimensional match to the original part, with identical contact lengths (mating: 0.276", post: 0.118") and 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 ~ 125°C, providing thermal margin beyond the original specification. Voltage rating is specified at 150VDC.

All three substitutes carry ROHS3 compliance and UL94 V-0 flammability certification, meeting regulatory requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0022288210 (tin-plated) be used as a direct replacement for the M20-9712145 (gold-plated)?

A: The Molex 0022288210 is electrically and mechanically compatible with the M20-9712145. The primary difference is the contact finish material. Tin plating provides adequate corrosion protection for most general-purpose and industrial applications. Gold plating offers superior corrosion resistance and is preferred for high-reliability, long-term storage, or harsh environmental applications. Application requirements determine suitability.

Q: What are the dimensional differences between the substitute parts?

A: The Molex parts (0022288210 and 0022288212) feature slightly shorter mating contact length (0.244" vs. 0.276") and reduced insulation height (0.098" vs. 0.100") compared to the original M20-9712145. The Preci-Dip 890-70-021-20-002101 maintains identical dimensions to the original. These variations are within standard connector manufacturing tolerances and do not affect mating compatibility.

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

A: The M20-9712145 packaging information is not specified in the original documentation. All three substitute parts are available in bulk packaging. Confirm packaging requirements with your procurement specification before finalizing part selection.

Q: Which substitute part offers the widest operating temperature range?

A: The Preci-Dip 890-70-021-20-002101 supports -55°C ~ 125°C, exceeding the original M20-9712145 range of -40°C ~ 105°C. This extended range provides thermal margin for applications subject to extreme environmental conditions.

Q: Do all substitute parts meet the same compliance standards as the original?

A: Yes. All three substitute parts carry ROHS3 compliance and UL94 V-0 flammability certification, matching the original M20-9712145 regulatory status. Moisture sensitivity level is 1 (Unlimited) for all parts.

Q: What is the current rating for the Molex substitute parts?

A: Current rating is not specified in the available documentation for the Molex 0022288210 and 0022288212. The original M20-9712145 and Preci-Dip 890-70-021-20-002101 both specify 3A per contact. Consult Molex technical documentation or contact the manufacturer for current rating confirmation on the Molex parts.

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