M22-2020646 Equivalent & Substitute Parts

Part Overview

The M22-2020646 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole board-to-board applications with 12 positions at 2.00mm pitch. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The connector features a cuttable header design with unshrouded configuration, tin-plated contacts, and operates across -40°C to 105°C. Substitution is required to access active product alternatives with improved availability and extended operational specifications.

Key Parameters

Parameter	M22-2020646
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.079" (2.00mm)
Number of Positions	12
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Tin
Contact Material	Phosphor Bronze
Insulation Material	Polyamide (PA6T), Nylon 6T
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 logic is based on the following critical parameters that must align with the M22-2020646:

Core Compatibility Requirements:

Pitch - Mating: 0.079" (2.00mm) — exact match required
Number of Positions: 12 — exact match required
Number of Rows: 2 — exact match required
Row Spacing - Mating: 0.079" (2.00mm) — exact match required
Connector Type: Header, Cuttable — exact match required
Contact Type: Male Pin — exact match required
Mounting Type: Through Hole — exact match required
Termination: Solder — exact match required
Shrouding: Unshrouded — exact match required
Fastening Type: Push-Pull — exact match required

Allowable Variations:

Contact Finish - Mating: Tin or Gold acceptable (Gold provides enhanced corrosion resistance)
Insulation Material: Polyamide (PA6T) or Liquid Crystal Polymer (LCP) acceptable (LCP offers superior thermal and mechanical properties)
Operating Temperature: May extend beyond -40°C ~ 105°C (wider range acceptable)
Current Rating: May exceed 1A per Contact (higher rating acceptable)
Product Status: Active preferred over Obsolete

All substitute parts listed maintain electrical and mechanical compatibility with the M22-2020646 while offering improved product status and availability.

Parameter Comparison

Parameter	M22-2020646	M22-2020605	MTMM-106-02-F-D-080	MTMM-106-02-F-D-095	MTMM-106-02-G-D-098	MTMM-106-02-G-D-100-010	MTMM-106-02-H-D-100	MTMM-106-02-L-D-090	MTMM-106-02-S-D-100	MTMM-106-02-T-D-100	MTMM-106-02-T-D-106
Manufacturer	Harwin Inc.	Harwin Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
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)
Number of Positions	12	12	12	12	12	12	12	12	12	12	12
Number of Rows	2	2	2	2	2	2	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)	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, Cuttable	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
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Tin	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Tin	Tin
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	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)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	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	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C
Current Rating	1A per Contact	1A per Contact	3A	3A	3A	3A	3A	3A	3A	3A	3A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	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: M22-2020605

The M22-2020605 is the direct Harwin Inc. equivalent to the M22-2020646. Both parts share identical mechanical and electrical specifications with the exception of contact finish (Gold vs. Tin mating surface). The M22-2020605 maintains the same operating temperature range (-40°C ~ 105°C), current rating (1A per Contact), and insulation material (Polyamide PA6T). This part is active and maintains full ROHS3 compliance and UL94 V-0 flammability rating. Selection of M22-2020605 provides continuity within the Harwin M22 series and requires no design modifications.

Secondary Recommendation: Samtec MTMM-106 Series

The Samtec MTMM-106 series provides cross-manufacturer alternatives with enhanced specifications. All variants maintain the critical 2.00mm pitch, 12-position, 2-row configuration and through-hole solder termination. Samtec parts offer extended operating temperature ranges (-55°C ~ 125°C or -55°C ~ 105°C depending on variant) and increased current ratings (3A per Contact). Insulation material transitions to Liquid Crystal Polymer (LCP), which provides superior thermal stability and mechanical properties compared to Polyamide.

Samtec Variant Selection Criteria:

MTMM-106-02-T-D-100 or MTMM-106-02-T-D-106: Select for tin-plated mating contacts matching the original M22-2020646 finish specification. Operating temperature -55°C ~ 105°C.
MTMM-106-02-F-D-080, MTMM-106-02-F-D-095, MTMM-106-02-L-D-090: Select for gold-plated mating contacts with extended temperature range (-55°C ~ 125°C). These variants provide enhanced corrosion resistance.
MTMM-106-02-G-D-098, MTMM-106-02-G-D-100-010, MTMM-106-02-H-D-100, MTMM-106-02-S-D-100: Select for gold-plated mating and post contacts with extended temperature range (-55°C ~ 125°C). These variants provide maximum corrosion protection on both contact surfaces.

All substitute parts maintain ROHS3 compliance, UL94 V-0 flammability rating, and MSL 1 (Unlimited) moisture sensitivity level.

Frequently Asked Questions (FAQ)

Q: Can M22-2020605 be used as a direct replacement for M22-2020646?

A: Yes. M22-2020605 is electrically and mechanically compatible with M22-2020646. The only difference is the mating contact finish: M22-2020605 features gold plating instead of tin. Gold provides superior corrosion resistance and is acceptable for all applications where tin was previously used. No design modifications are required.

Q: What are the key differences between Harwin M22 and Samtec MTMM-106 series?

A: Both series maintain identical pitch (2.00mm), position count (12), row configuration (2), and mounting type (through-hole solder). Primary differences are: (1) Insulation material — M22 uses Polyamide (PA6T) while MTMM-106 uses Liquid Crystal Polymer (LCP); (2) Operating temperature — MTMM-106 extends to -55°C ~ 125°C versus M22's -40°C ~ 105°C; (3) Current rating — MTMM-106 supports 3A per contact versus M22's 1A per contact. These differences represent improvements in thermal stability, mechanical properties, and current-carrying capacity.

Q: Why do Samtec MTMM-106 variants have different contact length specifications?

A: Contact length variations (0.080", 0.090", 0.095", 0.098", 0.100", 0.106") accommodate different mating depths and board stackup requirements. Selection depends on the specific mating connector or receptacle used in the application. All variants maintain the same overall connector length (0.255" / 6.48mm) and are mechanically compatible with standard 2.00mm pitch receptacles.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts, including M22-2020605 and all Samtec MTMM-106 variants, are ROHS3 compliant and maintain UL94 V-0 flammability rating. Moisture sensitivity level is MSL 1 (Unlimited) for all parts.

Q: What is the difference between tin and gold contact finishes?

A: Tin-plated contacts (M22-2020646, MTMM-106-02-T-D-100, MTMM-106-02-T-D-106) provide cost-effective performance for standard applications. Gold-plated contacts (M22-2020605, MTMM-106-02-F-D-080, MTMM-106-02-F-D-095, and others) offer enhanced corrosion resistance, lower contact resistance, and improved reliability in harsh environments or high-reliability applications. Gold finish is acceptable as a substitute for tin in all applications.

Q: Can I mix and match different Samtec MTMM-106 variants in the same design?

A: Yes, provided the contact length specifications are compatible with your mating connector. All MTMM-106 variants share identical pitch, position count, row spacing, and overall connector dimensions. Differences in contact length and finish do not affect mechanical compatibility or electrical performance within the specified operating parameters.

Q: What is the significance of the "-010" suffix in MTMM-106-02-G-D-100-010?

A: The "-010" suffix indicates that 11 of the 12 positions are loaded with contacts, leaving one position empty. This variant is used in applications requiring a keying or alignment feature. All other listed variants have all 12 positions loaded.

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