M20-9730945 Equivalent & Substitute Parts

Part Overview

The M20-9730945 is a vertical through-hole rectangular connector header manufactured by Harwin Inc., configured for 9 positions at 0.100" (2.54mm) pitch. This connector is classified as Obsolete, which necessitates identification of active equivalent parts for ongoing design and procurement requirements. The part features a cuttable header design with unshrouded male pins, gold-plated mating contacts, and solder termination suitable for board-to-board or cable applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9730945
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	9
Number of Rows	1
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 eligibility is determined by strict alignment with the following critical parameters:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 9
Number of Rows: 1
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Fastening Type: Push-Pull
Connector Style: Board to Board or Cable
Shrouding: Unshrouded
Material Flammability Rating: UL94 V-0
RoHS Status: ROHS3 Compliant or RoHS Compliant

Substitute parts are grouped into two categories based on contact finish specifications:

Category A - Gold Mating Contact Finish: Parts with gold-plated mating contacts matching the original specification. These include M20-9730946 (Harwin), 0901200769 (Molex C-Grid III), 0901200929 (Molex C-Grid III), 77311-124-09LF (Amphenol ICC BERGSTIK®), 77311-127-09LF (Amphenol ICC BERGSTIK®), 77311-824-09LF (Amphenol ICC BERGSTIK®), and 61300911121 (Würth Elektronik WR-PHD).

Category B - Tin Mating Contact Finish: Parts with tin-plated mating contacts, which differ from the original gold finish. These include M20-9730946 (Harwin, alternate finish), 0022284092 (Molex KK254), 0901200129 (Molex C-Grid III), and 77311-424-09LF (Amphenol ICC BERGSTIK®).

All substitute parts maintain the same pitch, position count, row configuration, contact type, mounting method, and termination as the original M20-9730945.

Parameter Comparison

Parameter	M20-9730945	M20-9730946	0022284092	0901200129	0901200769	0901200929	61300911121	77311-124-09LF	77311-127-09LF	77311-424-09LF	77311-824-09LF
Manufacturer	Harwin Inc.	Harwin Inc.	Molex	Molex	Molex	Molex	Würth Elektronik	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Series	M20	M20	KK254, 42375	C-Grid III 90120	C-Grid III 90120	C-Grid III 90120	WR-PHD	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Connector Type	Header, Cuttable	Header, Cuttable	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
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 Positions	9	9	9	9	9	9	9	9	9	9	9
Number of Rows	1	1	1	1	1	1	1	1	1	1	1
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	Tin	Tin	Tin	Gold	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Tin	Gold or Gold, GXT™
Contact Material	Brass	Brass	Not Specified	Brass	Brass	Brass	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA), Nylon, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyester, Glass Filled	Polyamide (PA6T), Nylon 6T	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	Not Specified	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 105°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C
Current Rating	3A per Contact	3A per Contact	Not Specified	Not Specified	Not Specified	Not Specified	3A	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	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable	1 (Unlimited)	Not Applicable	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: M20-9730946 (Harwin Inc.)

The M20-9730946 is the direct active equivalent from the same manufacturer and series. It maintains identical mechanical and electrical specifications to the M20-9730945, with the exception of contact finish (tin versus gold on mating surface). The part is Active status with 2965 units in stock. RoHS3 compliance and UL94 V-0 flammability rating are maintained. This part is the preferred choice for direct replacement in existing designs.

Secondary Recommendations - Gold Mating Contact Finish:

For applications requiring gold mating contact finish matching the original specification, the following active parts are suitable:

61300911121 (Würth Elektronik WR-PHD): Maintains gold mating contact finish, identical operating temperature range (-40°C ~ 105°C), 3A current rating, and polyamide insulation material. 2360 units in stock.
77311-124-09LF, 77311-127-09LF, 77311-824-09LF (Amphenol ICC BERGSTIK®): All feature gold mating contact finish with extended operating temperature range (-65°C ~ 125°C) and 3A per contact rating. These parts differ in contact length specifications and contact finish thickness.
0901200769, 0901200929 (Molex C-Grid III): Both provide gold mating contact finish with extended operating temperature range (-55°C ~ 125°C).

Alternative Options - Tin Mating Contact Finish:

For applications where contact finish material is not critical:

0022284092 (Molex KK254): Active status with 1075 units in stock. Tin mating contact finish, UL94 V-0 rating, RoHS3 compliant.
0901200129 (Molex C-Grid III): Active status with 1978 units in stock. Tin mating contact finish, extended operating temperature range (-55°C ~ 125°C).
77311-424-09LF (Amphenol ICC BERGSTIK®): Active status with 958 units in stock. Tin mating contact finish, extended operating temperature range (-65°C ~ 125°C).

All recommended substitutes maintain ROHS3 or RoHS compliance and UL94 V-0 flammability rating. Selection should be based on specific application requirements regarding contact finish, operating temperature range, and packaging format.

Frequently Asked Questions (FAQ)

Q: Can M20-9730946 be used as a direct replacement for M20-9730945?

A: Yes. M20-9730946 is the active equivalent from Harwin Inc. in the same M20 series. It matches all critical parameters including pitch, position count, mounting type, and termination. The primary difference is the mating contact finish (tin versus gold). Both parts are UL94 V-0 rated and ROHS3 compliant.

Q: What is the significance of contact finish differences between substitute parts?

A: Contact finish affects electrical performance and environmental resistance. Gold-plated contacts (M20-9730945, 61300911121, 77311-124-09LF, 77311-127-09LF, 77311-824-09LF, 0901200769, 0901200929) provide superior corrosion resistance and lower contact resistance. Tin-plated contacts (M20-9730946, 0022284092, 0901200129, 77311-424-09LF) are suitable for standard applications but may exhibit higher contact resistance over time in corrosive environments.

Q: Are there packaging differences among the substitute parts?

A: Yes. M20-9730946 is supplied in Bulk packaging. Molex parts 0022284092, 0901200129, 0901200769, 0901200929 are supplied in Bulk or Tray formats. Amphenol ICC BERGSTIK® parts are supplied in Bulk. Würth Elektronik 61300911121 is supplied in Bulk. Packaging format may affect procurement and handling procedures but does not impact electrical or mechanical compatibility.

Q: Which substitute parts have extended operating temperature ranges?

A: Molex C-Grid III series (0901200129, 0901200769, 0901200929) and Amphenol ICC BERGSTIK® series (77311-124-09LF, 77311-127-09LF, 77311-424-09LF, 77311-824-09LF) operate from -55°C to -65°C minimum and 125°C maximum, compared to the original M20-9730945 range of -40°C to 105°C. This extended range may be beneficial for industrial or automotive applications.

Q: What is the difference between "Cuttable" and "Breakaway" connector types?

A: Both connector types accommodate 9-position configurations at 0.100" pitch. Cuttable headers (M20-9730945, M20-9730946) allow individual pins to be separated by cutting. Breakaway headers (Molex KK254, C-Grid III series) feature pre-scored sections for position separation. Functionally, both types are compatible for board-to-board applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are either ROHS3 Compliant or RoHS Compliant, meeting regulatory requirements for hazardous substance restrictions.

Q: Which substitute part has the highest current rating specification?

A: All substitute parts with specified current ratings are rated at 3A per contact, matching the original M20-9730945 specification. Molex parts 0022284092 and 0901200129 do not specify current rating in available documentation.

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