Harwin M20-9731545 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9731545 is a rectangular connector header designed for through-hole mounting with 15 positions at 0.100" (2.54mm) pitch. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and new production applications. The connector features male pins, unshrouded design, and solder termination suitable for board-to-board or cable interconnection in general-purpose applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9731545
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	15
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Shrouding	Unshrouded
Contact Finish - Mating	Gold
Contact Material	Brass
Insulation Material	Polyamide (PA6T), Nylon 6T
Insulation Color	Black
Operating Temperature	-40°C ~ 105°C
Current Rating	3A per Contact
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the M20-9731545 is determined by strict alignment with the following electrical and mechanical parameters:

Critical Matching Parameters:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 15
Number of Rows: 1
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Fastening Type: Push-Pull
Shrouding: Unshrouded
Material Flammability Rating: UL94 V-0
RoHS Status: ROHS3 Compliant or RoHS Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Acceptable Variation Parameters:

Contact Length - Mating: Minor variations within 0.236" to 0.320" (6.00mm to 8.13mm)
Contact Length - Post: Minor variations within 0.105" to 0.130" (2.67mm to 3.30mm)
Overall Contact Length: Minor variations within 0.458" to 0.530" (11.64mm to 13.46mm)
Insulation Height: Minor variations within 0.090" to 0.100" (2.29mm to 2.54mm)
Contact Finish - Mating: Gold or Gold with GXT™
Contact Finish - Post: Tin acceptable
Contact Material: Brass, Phosphor Bronze, or Copper Alloy acceptable
Insulation Material: Polyamide (PA), Nylon, Polyester, or Thermoplastic acceptable
Operating Temperature: Range must encompass or exceed -40°C ~ 105°C
Current Rating: 2A or higher acceptable

All substitute parts listed maintain compatibility with the original M20-9731545 application requirements while offering active product status and improved availability.

Parameter Comparison

Parameter	M20-9731545 (Harwin)	0022284155 (Molex)	0022284157 (Molex)	0901200775 (Molex)	77311-124-15LF (Amphenol ICC)	77311-127-15LF (Amphenol ICC)	77311-827-15LF (Amphenol ICC)	890-18-015-10-001101 (Preci-Dip)	961115-6804-AR (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)	0.100" (2.54mm)
Number of Positions	15	15	15	15	15	15	15	15	15
Number of Rows	1	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	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
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold	Gold
Contact Material	Brass	Not specified	Not specified	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass	Copper Alloy
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Polyester, Glass Filled	Thermoplastic	Thermoplastic	Thermoplastic	Polyamide (PA), Nylon, Glass Filled	Thermoplastic
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black	Black
Operating Temperature	-40°C ~ 105°C	Not specified	Not specified	-55°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-55°C ~ 125°C	-25°C ~ 105°C
Current Rating	3A per Contact	Not specified	Not specified	Not specified	3A per Contact	3A per Contact	3A per Contact	3A	2A
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	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability and manufacturing support. Selection among the substitute options depends on specific application requirements:

Molex KK254 Series (0022284155, 0022284157): These parts offer ROHS3 compliance and active status with extended operating temperature ranges where not specified in the original part. The KK254 series provides breakaway connector capability, offering design flexibility for applications requiring modular assembly.

Molex C-Grid III 90120 Series (0901200775): This option extends the operating temperature range to -55°C ~ 125°C and maintains ROHS3 compliance. The C-Grid III series is suitable for applications requiring enhanced thermal performance beyond the original specification.

Amphenol ICC BERGSTIK® Series (77311-124-15LF, 77311-127-15LF, 77311-827-15LF): These parts feature phosphor bronze contacts and thermoplastic insulation with operating temperature ranges of -65°C ~ 125°C. All three variants maintain 3A per contact current rating and RoHS compliance. Selection among these three depends on contact length requirements: 77311-124-15LF provides 0.266" mating contact length, while 77311-127-15LF and 77311-827-15LF both provide 0.260" mating contact length with differing gold plating thicknesses (30.0µin versus 15.0µin respectively).

Preci-Dip 890 Series (890-18-015-10-001101): This option provides ROHS3 compliance with extended operating temperature range (-55°C ~ 125°C) and includes voltage rating specification (150VDC). The 890 series is suitable for applications requiring explicit voltage rating documentation.

3M 961 Series (961115-6804-AR): This part maintains the original operating temperature range (-25°C ~ 105°C) with 2A current rating per contact. The 961 series is suitable for applications where the original thermal and current specifications are sufficient and cost optimization is a consideration.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the M20-9731545?

A: Yes, all listed substitute parts are electrically and mechanically compatible with the M20-9731545. They share the same 0.100" (2.54mm) pitch, 15-position single-row configuration, male pin contact type, through-hole mounting, solder termination, and push-pull fastening. All maintain UL94 V-0 flammability rating and MSL 1 moisture sensitivity level.

Q: What are the key differences between the substitute options?

A: The primary differences are contact material composition, insulation material type, operating temperature ranges, and contact length dimensions. Molex KK254 and C-Grid III series offer breakaway capability. Amphenol ICC BERGSTIK® series provides phosphor bronze contacts with extended temperature range. Preci-Dip 890 series includes voltage rating specification. 3M 961 series offers cost optimization with 2A current rating.

Q: Are all substitute parts RoHS compliant?

A: Yes, all substitute parts are RoHS compliant. Eight of the nine parts are ROHS3 compliant, while the Amphenol ICC BERGSTIK® series parts are RoHS compliant. Both compliance levels are acceptable for applications requiring lead-free manufacturing.

Q: Do the substitute parts have the same current rating as the original M20-9731545?

A: Most substitute parts maintain the 3A per contact rating. The exception is the 3M 961115-6804-AR, which has a 2A per contact rating. For applications requiring 3A per contact, select from the Molex, Amphenol ICC, or Preci-Dip options.

Q: What is the difference between the three Amphenol ICC BERGSTIK® options?

A: The three BERGSTIK® variants differ in contact length and gold plating thickness. Part 77311-124-15LF provides 0.266" mating contact length with 30.0µin gold plating. Parts 77311-127-15LF and 77311-827-15LF both provide 0.260" mating contact length, with 77311-127-15LF offering 30.0µin gold plating and 77311-827-15LF offering 15.0µin gold plating. Select based on specific mating depth and contact durability requirements.

Q: Which substitute part offers the widest operating temperature range?

A: The Amphenol ICC BERGSTIK® series (77311-124-15LF, 77311-127-15LF, 77311-827-15LF) offers the widest operating temperature range of -65°C ~ 125°C, followed by the Molex C-Grid III 90120 (0901200775) and Preci-Dip 890 series (890-18-015-10-001101) at -55°C ~ 125°C.

Q: Are there any packaging or inventory considerations?

A: All substitute parts are available in bulk packaging with substantial inventory levels ranging from 636 to 1067 pieces in stock, ensuring reliable supply for production requirements.

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