M20-9972345 Equivalent & Substitute Parts

Part Overview

The M20-9972345 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole mounting applications requiring 46-position, 2-row board-to-board connectivity at 0.100" (2.54mm) pitch. This component features male pins with gold-plated mating contacts, solder termination, and push-pull fastening. The part is classified as obsolete, making identification of active equivalent components essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	46
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
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

The substitute part 892-70-046-10-003101 (Preci-Dip) qualifies as a functional equivalent based on the following critical parameters:

Connector Configuration: Both parts maintain 46 positions in a 2-row arrangement with 0.100" (2.54mm) pitch and row spacing
Contact System: Both feature male pins with gold-plated mating surfaces and square contact geometry
Electrical Performance: Both rated for 3A per contact with identical contact material (brass) and insulation composition
Mounting & Termination: Both utilize through-hole solder termination with push-pull fastening
Compliance: Both achieve UL94 V-0 flammability rating and ROHS3 compliance
Environmental Classification: Both rated MSL 1 (Unlimited moisture sensitivity)

The substitute part demonstrates enhanced specifications in operating temperature range (-55°C ~ 125°C versus -40°C ~ 105°C) and includes voltage rating specification (150VDC), representing a superset of the original part's capabilities.

Parameter Comparison

Parameter	M20-9972345 (Harwin)	892-70-046-10-003101 (Preci-Dip)
Manufacturer	Harwin Inc.	Preci-Dip
Product Status	Obsolete	Active
Number of Positions	46	46
Number of Rows	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Contact Type	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Contact Finish - Mating	Gold	Gold (Flash)
Contact Material	Brass	Brass
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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
Contact Length - Mating	0.335" (8.51mm)	0.335" (8.51mm)
Contact Length - Post	0.116" (2.95mm)	0.118" (3.00mm)
Overall Contact Length	0.551" (14.00mm)	0.553" (14.04mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)

Engineering Selection Recommendations

The 892-70-046-10-003101 (Preci-Dip) is the designated manufacturer-recommended substitute for the obsolete M20-9972345. Selection of this equivalent part is supported by:

Active Product Status: The substitute maintains current manufacturing and supply chain availability, eliminating obsolescence risk
Regulatory Compliance: Both parts achieve identical UL94 V-0 and ROHS3 certifications, ensuring compliance continuity
Electrical & Mechanical Compatibility: Identical pitch, position count, contact configuration, and current rating ensure direct functional substitution in existing PCB designs
Enhanced Operating Range: The substitute's extended temperature specification (-55°C ~ 125°C) provides broader environmental capability
Contact Geometry Alignment: Mating contact length and overall contact length remain within 0.002" (0.04mm) variance, maintaining mechanical interchangeability

Frequently Asked Questions (FAQ)

Q: Can the 892-70-046-10-003101 be used as a direct replacement in existing designs using the M20-9972345?

A: Yes. Both parts share identical pitch (0.100"), position count (46), row configuration (2 rows), contact type (male pin), and current rating (3A). The contact length variance of 0.002" (0.04mm) is within standard PCB tolerance and does not affect mating compatibility.

Q: What is the significance of the "Flash" gold finish on the substitute part?

A: Flash gold plating is a thin, uniform coating applied to contact surfaces to enhance conductivity and corrosion resistance. This finish specification on the substitute part meets the same functional requirements as the original part's gold finish for mating contact reliability.

Q: Are there any packaging differences between the original and substitute parts?

A: The original part (M20-9972345) packaging specification is not provided. The substitute part (892-70-046-10-003101) is supplied in bulk packaging. Verify packaging requirements for your procurement process.

Q: Does the extended operating temperature range of the substitute part affect compatibility?

A: No. The substitute's operating range (-55°C ~ 125°C) encompasses the original part's range (-40°C ~ 105°C). This represents enhanced capability with no compatibility impact.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the M20-9972345 and 892-70-046-10-003101 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

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