Equivalent & Substitute Parts for M22-2021346

Part Overview

The M22-2021346 is a rectangular connector header manufactured by Harwin Inc., featuring 26 positions at 2.00mm pitch with through-hole solder termination. This connector is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The part operates across a temperature range of -40°C to 105°C and is suitable for board-to-board connections in electronic assemblies.

Key Parameters

Parameter	Value
Manufacturer Part Number	M22-2021346
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	26
Number of Rows	2
Pitch - Mating	0.079" (2.00mm)
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Contact Shape	Square
Operating Temperature	-40°C ~ 105°C
Current Rating	1A per Contact
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the M22-2021346 is determined by the following critical parameters:

Pitch and Position Configuration: All substitutes maintain 0.079" (2.00mm) pitch with 26 positions in 2 rows
Connector Type: Header, cuttable configuration for board-to-board or cable applications
Contact Type: Male pin contacts with square shape
Mounting: Through-hole solder termination
Electrical Performance: Current rating and operating temperature range
Compliance: RoHS3 compliance and UL94 V-0 flammability rating

The substitute parts are grouped into two categories:

Category 1 - Direct Harwin Equivalent: M22-2021305 maintains identical mechanical and electrical specifications with active product status and improved contact finish (gold plating).

Category 2 - Samtec Cross-Substitutes: MTMM and TMMH series parts from Samtec Inc. provide functional equivalence with variations in contact length, insulation material (LCP vs. Nylon 6T), and current rating capabilities. These parts accommodate different mating depths and post lengths for application-specific requirements.

Parameter Comparison

Parameter	M22-2021346	M22-2021305	MTMM-113-02-T-D-100	MTMM-113-04-G-D-085	MTMM-113-04-G-D-100	MTMM-113-12-S-D-100	MTMM-113-13-S-D-100	TMM-113-06-L-D	TMMH-113-04-F-D	TMMH-113-04-G-D	TMMH-113-04-L-D
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	26	26	26	26	26	26	26	26	26	26	26
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
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)
Row Spacing - 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, Cuttable	Header	Header, Cuttable	Header, Cuttable	Header, Cuttable
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 Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish - Mating	Tin	Gold	Tin	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°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	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	1A per Contact	1A per Contact	3A	3A	3A	3A	3A	3.2A per Contact	Not Specified	Not Specified	Not Specified
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	Not Specified	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: M22-2021305

The M22-2021305 is the direct Harwin equivalent and represents the optimal substitution path. This part maintains identical mechanical dimensions, electrical specifications, and operating temperature range as the M22-2021346. The transition from tin to gold contact finish on the mating surface provides improved corrosion resistance and contact reliability. The M22-2021305 carries active product status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant and carry UL94 V-0 flammability certification.

Secondary Recommendation: Samtec MTMM and TMMH Series

Samtec substitutes are suitable when application requirements permit variations in contact length, insulation material, or current rating. The MTMM series offers higher current capacity (3A vs. 1A) and extended operating temperature range (-55°C to 125°C), making these parts appropriate for demanding thermal environments. The TMMH series provides low-profile configurations with reduced overall contact length, suitable for space-constrained applications.

Selection Criteria by Application:

Standard Applications: M22-2021305 provides direct compatibility with existing designs
High-Current Applications: MTMM series (3A rating) for increased power delivery
Extended Temperature Range: MTMM and TMMH series (-55°C to 125°C) for industrial environments
Space-Constrained Designs: TMMH series with 0.255" (6.48mm) overall contact length
Extended Post Length: MTMM-113-13-S-D-100 with 0.673" (17.09mm) overall contact length for deep PCB penetration

All substitute parts maintain ROHS3 compliance and UL94 V-0 flammability certification, meeting regulatory requirements equivalent to the original M22-2021346.

Frequently Asked Questions (FAQ)

Q: Can M22-2021305 be used as a direct replacement for M22-2021346?

A: Yes. The M22-2021305 maintains identical pitch (2.00mm), position count (26), row configuration (2 rows), mounting type (through-hole), and termination method (solder). Operating temperature range and current rating are equivalent. The primary difference is the contact finish upgrade from tin to gold on the mating surface, which improves reliability.

Q: What are the key differences between Harwin M22 and Samtec MTMM/TMMH series?

A: The primary differences are contact length, insulation material, and current rating. Harwin M22-2021305 uses Nylon 6T insulation with 1A per contact rating. Samtec MTMM series uses Liquid Crystal Polymer (LCP) insulation with 3A rating and offers multiple contact length options. TMMH series provides low-profile configurations with reduced mating contact length (0.075" vs. 0.138").

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting regulatory requirements for hazardous substance restrictions.

Q: Which substitute part should be selected for high-temperature applications?

A: Samtec MTMM and TMMH series parts operate across -55°C to 125°C, compared to M22-2021305 at -40°C to 105°C. Select MTMM or TMMH series when operating temperature exceeds 105°C or drops below -40°C.

Q: Can Samtec parts be used in existing designs without PCB modification?

A: Mechanical compatibility depends on contact length and post length specifications. MTMM-113-02-T-D-100 provides similar overall contact length (0.255") to TMMH series. MTMM variants with longer post lengths (MTMM-113-12-S-D-100, MTMM-113-13-S-D-100) require deeper PCB through-hole penetration. Verify PCB stackup and via depth before substitution.

Q: What is the difference between cuttable and non-cuttable header configurations?

A: Cuttable headers allow individual pin removal or partial header configuration by cutting the connector body. TMM-113-06-L-D is non-cuttable. All other listed substitutes are cuttable, providing design flexibility for custom pin configurations.

Q: Are contact finish differences significant for substitution?

A: Contact finish affects corrosion resistance and contact reliability. Gold-plated mating surfaces (M22-2021305, all Samtec substitutes) provide superior corrosion resistance compared to tin finish (M22-2021346). Gold finish is recommended for applications with extended shelf life or harsh environmental exposure.

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