M22-2012546 Equivalent & Substitute Parts

Part Overview

The M22-2012546 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole mounting with 25 positions at 0.079" (2.00mm) pitch. This connector features a cuttable design, unshrouded configuration, and tin-plated contacts rated for 1A per contact with an operating temperature range of -55°C to 105°C. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility for board-to-board or cable applications.

Key Parameters

Parameter	M22-2012546
Manufacturer	Harwin Inc.
Number of Positions	25
Pitch - Mating	0.079" (2.00mm)
Connector Type	Header, Cuttable
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Tin
Current Rating	1A per Contact
Operating Temperature	-55°C ~ 105°C
Insulation Material	Polyamide (PA6T), Nylon 6T
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: connector pitch (0.079" / 2.00mm), number of positions (25), contact type (male pin), mounting method (through-hole solder), and connector style (board-to-board or cable). All substitute parts listed maintain these core electrical and mechanical specifications.

Substitute parts are grouped into two categories:

Category 1: Harwin Inc. M22 Series (Same Manufacturer)

M22-2015005: Active status, 50-position variant with gold-plated mating contacts. Maintains identical pitch and mounting characteristics but provides double the position count.

Category 2: Samtec Inc. MTMM and TMM Series (Alternative Manufacturer)

MTMM-125 variants (02-G-S-150, 04-G-S-145, 14-G-S-120, 14-T-S-120): Active status, 25-position headers with enhanced current rating (3A per contact) and extended operating temperature range (-55°C to 125°C). Insulation material upgraded to Liquid Crystal Polymer (LCP).
TMM-125 variants (01-F-S, 01-SM-S, 02-L-S, 02-S-S, 06-G-S): Active status, 25-position headers with enhanced current rating (3.2A per contact) and extended operating temperature range (-55°C to 125°C). Insulation material upgraded to Liquid Crystal Polymer (LCP).

All substitute parts maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity level).

Parameter Comparison

Parameter	M22-2012546	M22-2015005	MTMM-125-02-G-S-150	MTMM-125-04-G-S-145	MTMM-125-14-G-S-120	MTMM-125-14-T-S-120	TMM-125-01-F-S	TMM-125-01-SM-S	TMM-125-02-L-S	TMM-125-02-S-S	TMM-125-06-G-S
Manufacturer	Harwin Inc.	Harwin Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Number of Positions	25	50	25	25	25	25	25	25	25	25	25
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Connector Type	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Contact Finish - Mating	Tin	Gold	Gold	Gold	Gold	Tin	Gold	Gold	Gold	Gold	Gold
Current Rating	1A per Contact	1A per Contact	3A	3A	3A	3A	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact	3.2A per Contact
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, ensuring continued availability and regulatory alignment. The M22-2015005 provides the closest functional match as a Harwin Inc. product within the same M22 series, maintaining identical electrical and thermal specifications while offering 50-position capacity for applications requiring expanded connectivity.

Samtec Inc. MTMM and TMM series alternatives provide enhanced performance characteristics including higher current ratings (3A to 3.2A per contact versus 1A) and extended operating temperature ranges (-55°C to 125°C versus -55°C to 105°C). These alternatives employ Liquid Crystal Polymer insulation material, which offers improved dimensional stability and thermal performance compared to polyamide. Selection between MTMM and TMM variants depends on specific contact length and post length requirements for your application geometry.

For applications with tin-plated contact requirements, MTMM-125-14-T-S-120 and TMM-125-01-F-S variants maintain tin finish on mating contacts while preserving all other performance enhancements.

Frequently Asked Questions (FAQ)

Q: Can M22-2015005 directly replace M22-2012546 in existing designs? A: M22-2015005 maintains identical pitch (0.079" / 2.00mm), contact type (male pin), mounting method (through-hole solder), and operating temperature range. The primary difference is position count (50 versus 25). Direct substitution is possible if your PCB layout accommodates the extended connector length, or if you use only the required 25 positions of the 50-position header.

Q: What are the key differences between Harwin M22 and Samtec MTMM/TMM series? A: Both maintain 0.079" (2.00mm) pitch and 25-position configuration. Samtec alternatives offer higher current ratings (3A to 3.2A per contact) and extended temperature range (-55°C to 125°C). Insulation material differs: Harwin uses polyamide (PA6T) while Samtec uses Liquid Crystal Polymer (LCP). Contact length and post length vary across MTMM and TMM variants to accommodate different application geometries.

Q: Are all substitute parts cuttable? A: Harwin M22-2015005 and Samtec MTMM series are specified as cuttable. Samtec TMM series are specified as header type without explicit cuttable designation. Confirm cuttability requirements with your application before selection.

Q: Which substitute part should I select if my application requires tin-plated contacts? A: MTMM-125-14-T-S-120 provides tin-plated mating contacts with extended temperature range and higher current rating. TMM-125-01-F-S provides gold-plated mating contacts with tin-plated posts. Verify contact finish requirements against your mating connector specifications.

Q: Do all substitute parts meet the same compliance standards? A: All listed substitute parts are ROHS3 compliant and carry MSL 1 (unlimited moisture sensitivity level) rating, matching the original M22-2012546 compliance profile. All parts carry EAR99 ECCN classification and identical HTSUS code (8536.69.4040).

Q: What is the impact of insulation material change from polyamide to LCP? A: Liquid Crystal Polymer (LCP) provides improved dimensional stability, lower moisture absorption, and enhanced thermal performance compared to polyamide. This material change supports the extended operating temperature range (-55°C to 125°C) and higher current ratings in Samtec alternatives. No functional incompatibility exists for standard board-to-board applications.

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