M20-9733146 Equivalent & Substitute Parts

Part Overview

The M20-9733146 is a vertical through-hole rectangular connector header manufactured by Harwin Inc., featuring 31 positions at 2.54mm pitch. This connector is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement. The part is suitable for board-to-board or cable applications with unshrouded design and push-pull fastening.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9733146
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	31
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Contact Shape	Square
Operating Temperature	-40°C ~ 105°C
Current Rating	3A per Contact
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the M20-9733146 is determined by the following critical parameters:

Primary Matching Criteria:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 31
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Connector Type: Header

Secondary Compatibility Factors:

Contact Shape: Square
Material Flammability Rating: UL94 V-0
RoHS Status: ROHS3 Compliant
Fastening Type: Push-Pull
Shrouding: Unshrouded

Substitute parts are grouped into two categories:

Category A - Direct Position Match (31 Positions): Parts maintaining identical position count with equivalent electrical and mechanical characteristics. These include Molex 0022284311, Molex 0022284314, Preci-Dip 890-80-031-10-002101, and Samtec Flex Stack variants (MTSW-131-08-F-S-300, MTSW-131-08-F-S-305, MTSW-131-08-F-S-310, MTSW-131-08-F-S-315).

Category B - Position Expansion (36 Positions): Harwin M20-9733646 provides increased position capacity while maintaining identical pitch and core electrical specifications, suitable for applications requiring additional signal lines.

Parameter Comparison

Parameter	M20-9733146	M20-9733646	0022284311	0022284314	890-80-031-10-002101	MTSW-131-08-F-S-300	MTSW-131-08-F-S-305	MTSW-131-08-F-S-310	MTSW-131-08-F-S-315
Manufacturer	Harwin Inc.	Harwin Inc.	Molex	Molex	Preci-Dip	Samtec Inc.	Samtec Inc.	Samtec Inc.	Samtec Inc.
Number of Positions	31	36	31	31	31	31	31	31	31
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Type	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
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Contact Finish - Mating	Tin	Tin	Tin	Gold	Tin	Gold	Gold	Gold	Gold
Contact Material	Brass	Brass	-	-	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
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
Current Rating	3A per Contact	3A per Contact	-	-	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
RoHS Status	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

Engineering Selection Recommendations

For Direct Replacement (31-Position Applications):

Molex 0022284311 and 0022284314 provide active-status equivalents with identical position count and pitch. Both are ROHS3 compliant and UL94 V-0 rated. The 0022284314 variant features gold mating contact finish compared to tin in the 0022284311, offering enhanced corrosion resistance in demanding environments.

Preci-Dip 890-80-031-10-002101 maintains identical position and pitch specifications with extended operating temperature range (-55°C to 125°C) and specified voltage rating of 150VDC, providing broader environmental compatibility.

Samtec Flex Stack MTSW series (MTSW-131-08-F-S-300, MTSW-131-08-F-S-305, MTSW-131-08-F-S-310, MTSW-131-08-F-S-315) offer active-status alternatives with extended temperature range (-55°C to 125°C), gold mating contact finish, and phosphor bronze contact material. These variants differ in contact length specifications to accommodate various application requirements.

For Position Expansion Applications:

Harwin M20-9733646 extends position capacity to 36 while maintaining identical pitch, mounting type, and electrical specifications. This part remains within the same manufacturer family and is active status, suitable for applications requiring additional signal lines without redesign of connector footprint spacing.

All substitute parts maintain ROHS3 compliance and UL94 V-0 flammability rating, ensuring regulatory alignment with the original specification.

Frequently Asked Questions (FAQ)

Q: Can M20-9733646 (36-position) be used as a direct replacement for M20-9733146 (31-position)?

A: M20-9733646 is mechanically and electrically compatible at the 2.54mm pitch standard. The additional 5 positions do not affect existing 31-position connections. Board layout must accommodate the increased connector length. This substitution is valid for applications where additional signal capacity is acceptable or beneficial.

Q: What is the primary difference between Molex 0022284311 and 0022284314?

A: Both parts are 31-position, 2.54mm pitch headers with identical mechanical specifications. The 0022284314 features gold mating contact finish (15.0µin thickness) compared to tin in the 0022284311. Gold finish provides superior corrosion resistance and is preferred for high-reliability or corrosive environment applications.

Q: How do Samtec MTSW variants differ from each other?

A: All Samtec MTSW-131 variants maintain 31 positions and 2.54mm pitch with identical electrical ratings. Variants differ in contact length specifications: MTSW-131-08-F-S-300 (0.300" mating), MTSW-131-08-F-S-305 (0.305" mating), MTSW-131-08-F-S-310 (0.310" mating), and MTSW-131-08-F-S-315 (0.315" mating). Selection depends on required mating depth and board thickness accommodation.

Q: Does Preci-Dip 890-80-031-10-002101 offer advantages over the original M20-9733146?

A: The Preci-Dip part maintains identical position count and pitch with extended operating temperature range (-55°C to 125°C versus -40°C to 105°C) and specified voltage rating of 150VDC. These specifications provide broader environmental compatibility for applications requiring enhanced thermal or electrical performance.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant and UL94 V-0 rated, matching the original M20-9733146 regulatory specifications.

Q: What packaging considerations apply to these substitutes?

A: M20-9733146 and M20-9733646 are supplied in bulk packaging. Molex, Preci-Dip, and Samtec parts are also supplied in bulk packaging. Verify packaging requirements with procurement specifications before component selection.

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