M20-9722845 Equivalent & Substitute Parts

Part Overview

The M20-9722845 is a vertical rectangular connector header manufactured by Harwin Inc., featuring 56 positions at 2.54mm pitch with through-hole solder termination. This cuttable header is designed for board-to-board or cable applications with male pin contacts and unshrouded configuration. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9722845
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	56
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
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 of the M20-9722845 is determined by the following critical parameters that must remain constant:

Position Count: 56 positions (exact match required)
Pitch: 0.100" (2.54mm) mating pitch
Row Configuration: 2 rows with 0.100" (2.54mm) row spacing
Contact Type: Male pin
Mounting: Through-hole solder termination
Connector Style: Board-to-board or cable compatible
Current Rating: 3A per contact minimum
Operating Temperature Range: Must encompass -40°C to 105°C
Flammability: UL94 V-0 rated
Compliance: RoHS3 compliant preferred for new designs

Substitute parts are grouped by contact material and finish specifications, which affect electrical performance and environmental resistance while maintaining mechanical and electrical compatibility. Contact length variations within acceptable mating heights are permissible provided overall connector dimensions remain compatible with existing PCB layouts.

Parameter Comparison

Parameter	M20-9722845	M20-9723645	2356-6221-TG	77313-122-56LF	77313-124-56LF	77313-127-56LF	77313-422-56LF	77313-424-56LF	77313-427-56LF	77313-822-56LF	77313-824-56LF
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	56	72	56	56	56	56	56	56	56	56	56
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)
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
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
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
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
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Contact Length - Mating	0.276" (7.00mm)	0.276" (7.00mm)	0.318" (8.08mm)	0.305" (7.75mm)	0.266" (6.75mm)	0.260" (6.60mm)	0.305" (7.75mm)	0.266" (6.75mm)	0.260" (6.60mm)	0.305" (7.75mm)	0.266" (6.75mm)
Contact Length - Post	0.122" (3.10mm)	0.122" (3.10mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.114" (2.90mm)	0.105" (2.67mm)	0.120" (3.05mm)	0.114" (2.90mm)	0.105" (2.67mm)	0.120" (3.05mm)	0.114" (2.90mm)
Overall Contact Length	0.496" (12.60mm)	0.496" (12.60mm)	0.538" (13.67mm)	0.526" (13.35mm)	0.480" (12.19mm)	0.465" (11.81mm)	0.526" (13.35mm)	0.480" (12.19mm)	0.465" (11.81mm)	0.526" (13.35mm)	0.480" (12.19mm)
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™

Engineering Selection Recommendations

Primary Substitute (Harwin Series): M20-9723645 is the manufacturer-recommended substitute from Harwin Inc. This part maintains identical electrical and mechanical specifications to the M20-9722845 with the exception of position count (72 vs. 56). This part is active and ROHS3 compliant, making it suitable for new designs requiring the same connector family.

Direct Electrical Equivalents (56-Position, Active Status): The Amphenol ICC (FCI) BERGSTIK® series parts (77313-122-56LF, 77313-124-56LF, 77313-127-56LF, 77313-422-56LF, 77313-424-56LF, 77313-427-56LF, 77313-822-56LF, 77313-824-56LF) provide full electrical and mechanical compatibility with identical position count, pitch, row spacing, and current ratings. All are active products with RoHS compliance. These parts differ in contact material finish (gold or tin) and contact length specifications, which affect mating height compatibility. Selection depends on PCB layout constraints and environmental requirements.

Alternative Manufacturer Option: The 3M 2356-6221-TG offers 56-position compatibility with identical pitch and row spacing. However, this part is RoHS non-compliant and REACH-affected, limiting its use in new designs subject to environmental regulations. It is suitable only for legacy system maintenance where RoHS compliance is not required.

Contact Length Considerations: Substitute parts are available in three contact length variants affecting overall mating height:

Long: 0.305" (7.75mm) mating contact length
Medium: 0.266" (6.75mm) mating contact length
Short: 0.260" (6.60mm) mating contact length

Selection must align with existing PCB receptacle specifications and mated stacking height requirements.

Frequently Asked Questions (FAQ)

Q: Can M20-9723645 replace M20-9722845 directly? A: M20-9723645 is electrically and mechanically compatible for the 56-position connector function. However, it is a 72-position part, so it cannot be used as a direct drop-in replacement if the PCB layout is designed specifically for 56 positions. It is suitable for new designs or applications where the additional positions can be utilized or left unloaded.

Q: What is the difference between the Amphenol BERGSTIK® variants? A: The variants differ in contact finish (gold vs. tin) and contact length. Gold-finished contacts (77313-122-56LF, 77313-124-56LF, 77313-127-56LF, 77313-822-56LF, 77313-824-56LF) provide superior corrosion resistance. Tin-finished contacts (77313-422-56LF, 77313-424-56LF, 77313-427-56LF) are cost-effective alternatives. Contact length affects mating height compatibility with existing receptacles.

Q: Is the 3M 2356-6221-TG suitable for new production? A: The 3M part is not recommended for new designs due to RoHS non-compliance and REACH-affected status. It is restricted in markets with environmental regulations. Use only for legacy system maintenance where regulatory compliance is not applicable.

Q: What are the mated stacking heights for the M20-9722845? A: The M20-9722845 supports mated stacking heights of 9.94mm, 10.64mm, 11.04mm, and 16.54mm. Substitute parts must be selected to maintain compatibility with existing receptacle specifications.

Q: Are all substitute parts rated for the same current and temperature range? A: All substitute parts maintain the 3A per contact current rating. Operating temperature ranges vary: M20-9722845 and M20-9723645 operate from -40°C to 105°C, while Amphenol BERGSTIK® parts operate from -65°C to 130°C, providing extended temperature capability. The 3M part operates from -55°C to 105°C.

Q: What is the difference between contact material (Brass vs. Phosphor Bronze)? A: The M20-9722845 uses brass contacts, while most Amphenol substitutes use phosphor bronze. Both materials meet the 3A current rating and UL94 V-0 flammability requirement. Phosphor bronze provides enhanced spring characteristics and durability in high-cycle mating applications.

Q: Can I mix substitute parts from different manufacturers in the same application? A: Mixing manufacturers is not recommended due to potential variations in contact geometry, mating force, and electrical characteristics. Maintain consistency within a single manufacturer's product line for optimal reliability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message