M20-9722945 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9722945 is a vertical rectangular connector header with 58 positions at 2.54mm pitch, designed for through-hole board-to-board or cable applications. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility. Substitute parts must preserve the core mating characteristics: 58-position configuration, 2.54mm pitch, 2-row layout, gold-plated mating contacts, and 3A per-contact current rating.

Key Parameters

Parameter	M20-9722945 Specification
Manufacturer Part Number	M20-9722945
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Number of Positions	58
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Gold
Contact Material	Brass
Insulation Material	Polyamide (PA6T), Nylon 6T
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 for the M20-9722945 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Number of Positions: 58 (exact match required)
Number of Rows: 2 (exact match required)
Pitch - Mating: 0.100" (2.54mm) (exact match required)
Row Spacing - Mating: 0.100" (2.54mm) (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)
Insulation Height: 0.100" (2.54mm) (exact match required)
Contact Shape: Square (exact match required)
Material Flammability Rating: UL94 V-0 (exact match required)
Current Rating: 3A per Contact (exact match required)

Allowable Variations:

Contact Finish - Mating: Gold or Tin (both acceptable for signal-level applications)
Contact Material: Brass or Phosphor Bronze (both acceptable)
Insulation Material: Polyamide (PA6T) or Thermoplastic (both acceptable)
Operating Temperature Range: May exceed original specification (-40°C ~ 105°C)
Contact Length - Mating: Minor variations acceptable within mechanical envelope
Contact Length - Post: Minor variations acceptable within mechanical envelope
Overall Contact Length: Minor variations acceptable within mechanical envelope
RoHS Status: Active parts may be RoHS Compliant or non-compliant (compliance not a substitution barrier)
Connector Type: Header or Header, Breakaway (both acceptable)

All substitute parts listed below satisfy these criteria and are classified as active products.

Parameter Comparison

Parameter	M20-9722945	M20-9723645	2358-6221-TG	77313-122-58LF	77313-124-58LF	77313-127-58LF	77313-422-58LF	77313-424-58LF	77313-427-58LF	77313-822-58LF	77313-824-58LF
Manufacturer	Harwin Inc.	Harwin Inc.	3M	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Number of Positions	58	72	58	58	58	58	58	58	58	58	58
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
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)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - 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)	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	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
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	Gold	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Tin	Tin	Tin	Gold or Gold, GXT™	Gold or Gold, GXT™
Contact Material	Brass	Brass	Copper Alloy	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	Thermoplastic, Glass Filled	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 105°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C
Current Rating	3A per Contact	3A per Contact	3A	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact
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
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

All listed substitute parts are active products with confirmed availability. Selection should prioritize parts with active product status and compliance certifications matching your application requirements.

Harwin M20-9723645: Active Harwin alternative with identical electrical and mechanical specifications to the original M20-9722945. This part maintains the same series lineage and insulation material composition. Recommended for direct replacement where Harwin continuity is preferred. Note: This part has 72 positions rather than 58, making it unsuitable as a direct substitute.

3M 2358-6221-TG: Active 3M alternative with identical 58-position, 2-row configuration and 2.54mm pitch. Electrical specifications match the original part. This part is RoHS non-compliant; selection requires confirmation that your application does not mandate RoHS compliance. Operating temperature range extends to -55°C, exceeding the original specification.

Amphenol ICC (FCI) BERGSTIK® Series (77313-122-58LF, 77313-124-58LF, 77313-127-58LF, 77313-422-58LF, 77313-424-58LF, 77313-427-58LF, 77313-822-58LF, 77313-824-58LF): All variants are active products with RoHS compliance. These parts maintain the 58-position, 2-row, 2.54mm pitch configuration. Operating temperature range extends to -65°C ~ 130°C. Contact finish options include gold-plated and tin-plated variants. Phosphor bronze contact material provides enhanced durability compared to brass. Selection among variants depends on contact finish requirements (gold or tin) and specific contact length specifications for your mechanical envelope.

Contact Length Variants: Amphenol ICC BERGSTIK® parts are available in three contact length configurations:

0.305" (7.75mm) mating contact length: 77313-122-58LF, 77313-422-58LF, 77313-822-58LF
0.266" (6.75mm) mating contact length: 77313-124-58LF, 77313-424-58LF, 77313-824-58LF
0.260" (6.60mm) mating contact length: 77313-127-58LF, 77313-427-58LF

Contact Finish Selection:

Gold-plated variants: 77313-122-58LF, 77313-124-58LF, 77313-127-58LF, 77313-822-58LF, 77313-824-58LF (recommended for signal integrity and corrosion resistance)
Tin-plated variants: 77313-422-58LF, 77313-424-58LF, 77313-427-58LF (suitable for cost-sensitive applications)

Frequently Asked Questions (FAQ)

Q: Can M20-9723645 replace M20-9722945? A: No. While M20-9723645 is an active Harwin product with identical electrical specifications, it has 72 positions instead of 58. This makes it mechanically incompatible with the original part's mating connector and PCB footprint.

Q: What is the primary difference between Amphenol ICC BERGSTIK® variants? A: BERGSTIK® variants differ in contact length and contact finish. Contact length variations (0.305", 0.266", 0.260" mating contact lengths) accommodate different mechanical envelopes and mating depths. Contact finish options are gold-plated (for signal applications and corrosion resistance) or tin-plated (for cost optimization). All variants maintain identical pitch, position count, and electrical ratings.

Q: Is 3M 2358-6221-TG suitable for RoHS-regulated applications? A: No. The 3M 2358-6221-TG is RoHS non-compliant. Applications requiring RoHS compliance must select from Amphenol ICC BERGSTIK® variants or Harwin M20-9723645 (noting the position count difference).

Q: What is the difference between gold and tin contact finishes? A: Gold-plated contacts (77313-122-58LF, 77313-124-58LF, 77313-127-58LF, 77313-822-58LF, 77313-824-58LF) provide superior corrosion resistance and signal integrity, making them suitable for high-reliability and signal-level applications. Tin-plated contacts (77313-422-58LF, 77313-424-58LF, 77313-427-58LF) are cost-effective alternatives for power distribution and non-critical signal applications.

Q: Are all substitute parts mechanically compatible with the original M20-9722945 mating connector? A: All 58-position, 2-row, 2.54mm pitch variants listed are mechanically compatible with connectors designed for the M20-9722945 footprint. Contact length variations may affect mating depth; verify your specific mating connector specifications before final selection.

Q: What is the operating temperature advantage of Amphenol ICC BERGSTIK® parts? A: Amphenol ICC BERGSTIK® variants operate across -65°C ~ 130°C, compared to the original M20-9722945 specification of -40°C ~ 105°C. This extended range accommodates industrial and automotive applications requiring broader temperature performance.

Q: Can I use tin-plated contacts in place of gold-plated contacts? A: Tin-plated contacts are electrically and mechanically compatible with gold-plated contact applications. However, tin exhibits lower corrosion resistance and higher contact resistance than gold. Use tin-plated variants only where cost optimization is prioritized over signal integrity and long-term reliability.

Q: What inventory levels are available for each substitute part? A: Current inventory: M20-9723645 (1121 pcs), 2358-6221-TG (1124 pcs), 77313-122-58LF (1133 pcs), 77313-124-58LF (725 pcs), 77313-127-58LF (888 pcs), 77313-422-58LF (741 pcs), 77313-424-58LF (882 pcs), 77313-427-58LF (686 pcs), 77313-822-58LF (931 pcs), 77313-824-58LF (1100 pcs).

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