M22-2521246 Equivalent & Substitute Parts

Part Overview

The M22-2521246 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole board-to-board applications with 24 positions at 2.00mm pitch. This connector features male pins with tin contact finish, phosphor bronze material, and operates across -40°C to 105°C. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Pitch - Mating	0.079" (2.00mm)
Number of Positions	24
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Connector Type	Header, Cuttable
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Operating Temperature	-40°C ~ 105°C
Current Rating	1A per Contact
Contact Material	Phosphor Bronze
Insulation Material	Polyamide (PA6T), Nylon 6T
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Pitch - Mating: 0.079" (2.00mm) — must match exactly for PCB footprint compatibility
Number of Positions: 24 — electrical interface requirement
Number of Rows: 2 — physical layout requirement
Row Spacing - Mating: 0.079" (2.00mm) — must match for connector alignment
Contact Type: Male Pin — electrical interface requirement
Mounting Type: Through Hole — assembly process requirement
Termination: Solder — assembly process requirement
RoHS Status: ROHS3 Compliant — regulatory requirement

All substitute parts listed meet these core parameters. Variations in contact finish, contact length, insulation material, and operating temperature range are permitted within the scope of equivalent substitution for this product category.

Parameter Comparison

Parameter	M22-2521246	M22-2521205	TMM-112-01-FM-D	TMM-112-01-L-D	TMM-112-02-S-D
Manufacturer	Harwin Inc.	Harwin Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Product Status	Obsolete	Active	Active	Active	Active
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Number of Positions	24	24	24	24	24
Number of Rows	2	2	2	2	2
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder
Contact Finish - Mating	Tin	Gold	Gold	Gold	Gold
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1A per Contact	1A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

M22-2521205 is the primary substitute for M22-2521246. Both are Harwin Inc. products within the M22 series, maintaining identical pitch, position count, row configuration, and operating temperature range. M22-2521205 is currently in active production status, whereas M22-2521246 is obsolete. The primary difference is contact finish: M22-2521205 features gold plating on mating contacts compared to tin on the original part. This upgrade provides enhanced corrosion resistance and contact reliability.

TMM-112-01-FM-D, TMM-112-01-L-D, and TMM-112-02-S-D are Samtec Inc. alternatives that meet all core substitution parameters. These parts offer extended operating temperature range (-55°C to 125°C versus -40°C to 105°C), higher current rating per contact (3.2A versus 1A), and liquid crystal polymer insulation material. All three are in active production status and ROHS3 compliant. Selection among the three Samtec variants depends on specific contact length and contact finish thickness requirements for your application.

Frequently Asked Questions (FAQ)

Q: Can M22-2521205 be used as a direct replacement for M22-2521246?

A: Yes. Both connectors share identical pitch (2.00mm), position count (24), row configuration (2 rows), and row spacing. PCB footprints are compatible. The gold contact finish on M22-2521205 provides improved corrosion resistance compared to the tin finish on M22-2521246.

Q: What are the key differences between Harwin M22-2521205 and Samtec TMM-112 variants?

A: The M22-2521205 maintains the original operating temperature range (-40°C to 105°C) and 1A per contact current rating. Samtec TMM-112 variants extend the operating temperature range to -55°C to 125°C and increase current rating to 3.2A per contact. Insulation material differs: M22-2521205 uses polyamide (PA6T), while TMM-112 variants use liquid crystal polymer (LCP).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. M22-2521205, TMM-112-01-FM-D, TMM-112-01-L-D, and TMM-112-02-S-D are all ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity level).

Q: Which substitute should I select if my application requires higher current capacity?

A: Samtec TMM-112 variants (TMM-112-01-FM-D, TMM-112-01-L-D, TMM-112-02-S-D) support 3.2A per contact compared to 1A on both M22-2521246 and M22-2521205. Selection among the three Samtec options depends on your specific contact length and finish thickness requirements.

Q: Do the substitute parts have different mating contact lengths?

A: Yes. M22-2521246 and M22-2521205 have mating contact length of 0.138" (4.60mm). TMM-112-01-FM-D and TMM-112-01-L-D have 0.126" (3.20mm), while TMM-112-02-S-D has 0.146" (3.71mm). Verify compatibility with your mating connector specifications.

Q: What is the inventory status of these substitute parts?

A: M22-2521205 has 1902 units in stock. TMM-112-01-FM-D has 975 units, TMM-112-01-L-D has 947 units, and TMM-112-02-S-D has 839 units in stock.

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