M20-9731946 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9731946 is a rectangular connector header designed for through-hole mounting with 19 positions at 0.100" (2.54mm) pitch. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design work, production continuity, and system maintenance. The part features male pins, unshrouded design, and solder termination suitable for board-to-board or cable applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9731946
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Description	CONN HEADER VERT 19POS 2.54MM
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	19
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Shape	Square
Insulation Material	Polyamide (PA6T), Nylon 6T
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
Insulation Color	Black
Current Rating	3A per Contact
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the M20-9731946 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Matching Criteria:

Pitch - Mating: 0.100" (2.54mm) — exact match required
Number of Positions: 19 — exact match required
Number of Rows: 1 — exact match required
Contact Type: Male Pin — exact match required
Mounting Type: Through Hole — exact match required
Termination: Solder — exact match required
Fastening Type: Push-Pull — exact match required
Contact Shape: Square — exact match required
Insulation Color: Black — exact match required
Material Flammability Rating: UL94 V-0 — exact match required

Allowable Variations:

Contact Length - Mating: Minor variations acceptable within mechanical envelope constraints
Contact Length - Post: Variations acceptable based on application depth requirements
Overall Contact Length: Variations acceptable based on PCB stack-up requirements
Insulation Height: Minor variations acceptable (±0.010")
Contact Finish - Mating: Tin or Gold acceptable; Gold provides enhanced corrosion resistance
Contact Material: Brass or Copper Alloy acceptable
Insulation Material: Polyamide (PA6T), Polyamide (PA), or Thermoplastic acceptable
Operating Temperature: Range must encompass or equal -40°C ~ 105°C minimum
Current Rating: Must meet or exceed 3A per Contact requirement
Product Status: Active status preferred for long-term availability

All substitute parts listed maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) classification.

Parameter Comparison

Parameter	M20-9731946 (Harwin)	0022284191 (Molex)	0022284194 (Molex)	77311-127-19LF (Amphenol ICC)	929647-02-19-I (3M)	929647-05-19-I (3M)	929647-09-19-I (3M)	961119-6804-AR (3M)
Manufacturer	Harwin Inc.	Molex	Molex	Amphenol ICC (FCI)	3M	3M	3M	3M
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)
Number of Positions	19	19	19	19	19	19	19	19
Number of Rows	1	1	1	1	1	1	1	1
Contact Type	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
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square
Contact Length - Mating	0.276" (7.00mm)	0.320" (8.13mm)	0.320" (8.13mm)	0.260" (6.60mm)	0.235" (5.97mm)	0.235" (5.97mm)	0.235" (5.97mm)	0.268" (6.80mm)
Contact Length - Post	0.122" (3.10mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.105" (2.67mm)	0.210" (5.33mm)	0.610" (15.49mm)	0.145" (3.68mm)	0.130" (3.30mm)
Overall Contact Length	0.496" (12.60mm)	0.530" (13.46mm)	0.530" (13.46mm)	0.465" (11.81mm)	0.545" (13.84mm)	0.945" (24.00mm)	0.480" (12.19mm)	0.496" (12.60mm)
Insulation Height	0.100" (2.54mm)	0.090" (2.29mm)	0.090" (2.29mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.098" (2.50mm)
Contact Finish - Mating	Tin	Tin	Gold	Gold or Gold, GXT™	Gold	Gold	Gold	Gold
Contact Material	Brass	Not Specified	Not Specified	Phosphor Bronze	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Thermoplastic	Polybutylene Terephthalate (PBT), Polyester, Glass Filled	Polybutylene Terephthalate (PBT), Polyester, Glass Filled	Polybutylene Terephthalate (PBT), Polyester, Glass Filled	Thermoplastic
Operating Temperature	-40°C ~ 105°C	Not Specified	Not Specified	-65°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-25°C ~ 105°C
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
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black
Current Rating	3A per Contact	Not Specified	Not Specified	3A per Contact	2.5A	2.5A	2.5A	2A
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable	Not Applicable	Not Applicable	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The Molex 0022284191 and 0022284194 (KK254 series) represent the most direct substitutes for the M20-9731946. Both parts maintain identical pitch, position count, row configuration, and contact geometry. The 0022284194 variant features gold-plated mating contacts, providing enhanced corrosion resistance compared to the tin-plated 0022284191. Both are active products with ROHS3 compliance and unlimited moisture sensitivity rating. The primary design consideration is the reduced insulation height (0.090" versus 0.100"), which may require PCB layout verification in space-constrained applications.

Secondary Substitutes (Acceptable with Design Review):

The 3M 929647 series (929647-02-19-I, 929647-05-19-I, 929647-09-19-I) provides functional equivalence with gold-plated contacts and copper alloy construction. These parts differ in post length, affecting overall stack-up height. The 929647-02-19-I and 929647-09-19-I offer comparable overall contact lengths to the original part. Current rating is specified at 2.5A per contact, which is lower than the original 3A specification; applications requiring the full 3A rating require current derating analysis. All three variants are active products with RoHS compliance.

Alternative Substitute (Extended Temperature Range):

The Amphenol ICC 77311-127-19LF (BERGSTIK series) provides an extended operating temperature range (-65°C ~ 125°C) and matches the original 3A current rating. This part features phosphor bronze contacts with gold plating and thermoplastic insulation. The reduced contact length for mating (0.260" versus 0.276") and post (0.105" versus 0.122") requires mechanical envelope verification. This option is suitable for applications requiring enhanced temperature performance.

Tertiary Substitute (Current-Limited Applications):

The 3M 961119-6804-AR provides functional compatibility with a specified current rating of 2A per contact. This part is suitable for applications where current requirements do not exceed 2A per contact. The operating temperature range (-25°C ~ 105°C) is narrower than the original specification, limiting use in extended low-temperature environments.

Selection Criteria Summary:

For direct replacement with minimal design changes: Molex 0022284191 or 0022284194
For enhanced corrosion resistance: Molex 0022284194 or 3M 929647 series
For extended temperature performance: Amphenol ICC 77311-127-19LF
For applications with reduced current requirements: 3M 961119-6804-AR

All substitute parts maintain UL94 V-0 flammability rating and black insulation color. Mechanical envelope verification is required for all substitutions due to variations in contact length and insulation height.

Frequently Asked Questions (FAQ)

Q: Can the M20-9731946 be directly replaced with any of these substitute parts without PCB modification?

A: Direct replacement without PCB modification is possible with the Molex 0022284191 and 0022284194 due to identical pitch and position count. However, the reduced insulation height (0.090" versus 0.100") may affect clearance in space-constrained designs. The 3M 929647 series and Amphenol ICC 77311-127-19LF require mechanical envelope verification due to variations in contact length and post length. The 3M 961119-6804-AR is compatible but requires current derating analysis for applications exceeding 2A per contact.

Q: What is the significance of contact finish differences (Tin versus Gold)?

A: Tin-plated contacts (Molex 0022284191) provide cost-effective performance in standard environments. Gold-plated contacts (Molex 0022284194, 3M 929647 series, Amphenol ICC 77311-127-19LF, 3M 961119-6804-AR) offer enhanced corrosion resistance and lower contact resistance, making them suitable for applications with extended shelf life, high-reliability requirements, or exposure to corrosive environments. Gold plating thickness varies across manufacturers; refer to specific datasheets for contact finish specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts maintain RoHS compliance. The original M20-9731946 is ROHS3 compliant, and all substitutes meet or exceed this standard. Specific RoHS status varies: Molex parts are ROHS3 compliant, Amphenol ICC is RoHS compliant, and 3M parts are RoHS compliant. All parts are suitable for applications requiring RoHS compliance.

Q: What are the current rating implications when substituting with 3M parts?

A: The original M20-9731946 specifies 3A per contact. The 3M 929647 series is rated at 2.5A per contact, and the 3M 961119-6804-AR is rated at 2A per contact. For applications requiring the full 3A rating, current derating analysis is necessary. The Molex and Amphenol ICC substitutes either do not specify current rating or match the original 3A specification, making them preferable for high-current applications.

Q: How do operating temperature ranges affect part selection?

A: The original M20-9731946 operates from -40°C to 105°C. Most substitutes maintain this range or exceed it. The Amphenol ICC 77311-127-19LF extends the range to -65°C ~ 125°C, suitable for extreme temperature applications. The 3M 961119-6804-AR operates from -25°C to 105°C, which is narrower at the low end; this part is unsuitable for applications requiring operation below -25°C.

Q: What packaging considerations apply to these substitute parts?

A: All substitute parts are supplied in bulk packaging. The original M20-9731946 is listed as cuttable, allowing individual position extraction. The Molex parts are listed as breakaway, providing similar functionality. The Amphenol ICC and 3M parts are standard headers without specific breakaway or cuttable designation; verify connector type requirements for applications requiring individual position separation.

Q: Are there any compliance or certification differences between substitutes?

A: All parts maintain UL94 V-0 flammability rating. Moisture sensitivity levels are consistent across most substitutes (MSL 1 - Unlimited), except for the 3M 929647 series, which lists MSL as Not Applicable. REACH status varies: the original part is REACH Unaffected, Molex parts are Vendor Undefined, Amphenol ICC is REACH Affected, and 3M parts are REACH Unaffected. For applications requiring specific REACH compliance, verify status with the component supplier.

Q: Which substitute offers the best long-term availability?

A: All listed substitutes are classified as active products, ensuring long-term availability. The Molex KK254 series (0022284191, 0022284194) and 3M 929647 series represent established product lines with broad market adoption. The Amphenol ICC BERGSTIK series is also widely used in industrial applications. For maximum availability assurance, consult with authorized distributors regarding inventory levels and lead times.

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