Harwin M20-9731546 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9731546 is a rectangular connector header with vertical orientation, 15 positions, and 2.54mm pitch designed for through-hole mounting. This connector is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part serves board-to-board or cable interconnection applications with unshrouded, cuttable design and push-pull fastening.

Key Parameters

Parameter	M20-9731546
Manufacturer	Harwin Inc.
Product Status	Obsolete
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
Contact Length - Mating	0.276" (7.00mm)
Contact Length - Post	0.122" (3.10mm)
Overall Contact Length	0.496" (12.60mm)
Insulation Height	0.100" (2.54mm)
Contact Shape	Square
Contact Finish - Mating	Tin
Contact Finish - Post	Tin
Contact Material	Brass
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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

Pitch - Mating: 0.100" (2.54mm) — exact match required
Number of Positions: 15 — 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
Material Flammability Rating: UL94 V-0 — exact match required
Insulation Color: Black — exact match required

Substitute parts are grouped into two categories based on contact length and insulation height variations, which remain within acceptable mechanical tolerances for board-to-board interconnection:

Group A (Molex KK254 Series): Parts 0022284155, 0022284157, and 0901200775 feature gold-plated mating contacts with slight variations in contact length and insulation height. These parts maintain compatibility through standard PCB footprint design.

Group B (Amphenol ICC BERGSTIK® and Preci-Dip 890 Series): Parts 77311-124-15LF, 77311-127-15LF, 77311-827-15LF, and 890-18-015-10-001101 provide alternative contact materials and finishes while maintaining core mechanical and electrical specifications.

Group C (3M 961 Series): Part 961115-6804-AR offers an alternative with different contact material and operating temperature range.

Parameter Comparison

Parameter	M20-9731546	0022284155	0022284157	0901200775	77311-124-15LF	77311-127-15LF	77311-827-15LF	890-18-015-10-001101	961115-6804-AR
Manufacturer	Harwin	Molex	Molex	Molex	Amphenol ICC	Amphenol ICC	Amphenol ICC	Preci-Dip	3M
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
Connector Type	Header, Cuttable	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header	Header	Header	Header	Header
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
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
Contact Length - Mating	0.276" (7.00mm)	0.295" (7.49mm)	0.320" (8.13mm)	0.266" (6.75mm)	0.266" (6.75mm)	0.260" (6.60mm)	0.260" (6.60mm)	0.236" (6.00mm)	0.268" (6.80mm)
Contact Length - Post	0.122" (3.10mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.114" (2.90mm)	0.114" (2.90mm)	0.105" (2.67mm)	0.105" (2.67mm)	0.122" (3.10mm)	0.130" (3.30mm)
Overall Contact Length	0.496" (12.60mm)	0.505" (12.83mm)	0.530" (13.46mm)	0.478" (12.15mm)	0.480" (12.19mm)	0.465" (11.81mm)	0.465" (11.81mm)	0.458" (11.64mm)	0.496" (12.60mm)
Insulation Height	0.100" (2.54mm)	0.090" (2.29mm)	0.090" (2.29mm)	0.098" (2.50mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.098" (2.50mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Tin	Gold	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold	Gold
Contact Finish - Post	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
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
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
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
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black	Black
Current Rating	3A per Contact	Not specified	Not specified	Not specified	3A per Contact	3A per Contact	3A per Contact	3A	2A
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts listed maintain active product status and comply with RoHS and REACH requirements, providing long-term supply chain viability compared to the obsolete M20-9731546.

Molex KK254 Series (0022284155, 0022284157, 0901200775): These parts offer the broadest compatibility with standard 2.54mm pitch PCB designs. The Molex 0901200775 (C-Grid III 90120 series) provides the closest mechanical alignment to the original part with operating temperature range of -55°C to 125°C and gold-plated mating contacts. All three Molex variants are ROHS3 compliant with unlimited moisture sensitivity rating.

Amphenol ICC BERGSTIK® Series (77311-124-15LF, 77311-127-15LF, 77311-827-15LF): These parts feature phosphor bronze contacts with gold or gold GXT™ finish and extended operating temperature range of -65°C to 125°C. The 77311-124-15LF and 77311-827-15LF maintain 3A per contact current rating matching the original specification. RoHS compliance is confirmed with REACH affected status noted.

Preci-Dip 890 Series (890-18-015-10-001101): This part maintains brass contact material consistent with the original M20-9731546 and provides 3A current rating with 150VDC voltage specification. Operating temperature range extends to -55°C to 125°C with ROHS3 compliance.

3M 961 Series (961115-6804-AR): This alternative provides copper alloy contacts with gold flash finish. Current rating is specified at 2A, which is lower than the original 3A specification. Operating temperature range is -25°C to 105°C, matching the original part's upper limit but with reduced lower temperature capability.

For applications requiring exact current rating match and extended temperature performance, Molex 0901200775, Amphenol ICC 77311-124-15LF, or Preci-Dip 890-18-015-10-001101 are primary selections. For general-purpose applications with standard operating conditions, all listed substitutes provide functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can I directly replace M20-9731546 with any of these substitute parts on existing PCBs?

A: Yes, all listed substitute parts share identical pitch (0.100" / 2.54mm), position count (15), row configuration (1), and mounting type (through hole). Standard PCB footprints designed for 2.54mm pitch headers accommodate all substitutes. Minor variations in contact length and insulation height remain within acceptable mechanical tolerances for board-to-board interconnection.

Q: What is the primary difference between Molex KK254 and Amphenol ICC BERGSTIK® series?

A: Molex KK254 parts feature breakaway connector design with gold-plated mating contacts and glass-filled nylon insulation. Amphenol ICC BERGSTIK® parts use phosphor bronze contacts with thermoplastic insulation and extended operating temperature range (-65°C to 125°C versus unspecified for Molex). Both maintain identical pitch and position specifications.

Q: Why does the 3M 961115-6804-AR have a lower current rating (2A vs. 3A)?

A: The 3M part features copper alloy contacts with flash gold finish and thermoplastic insulation, resulting in a 2A per contact current rating. Applications requiring 3A per contact should select Molex 0901200775, Amphenol ICC 77311-124-15LF, 77311-127-15LF, 77311-827-15LF, or Preci-Dip 890-18-015-10-001101.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts are RoHS compliant. Molex, Preci-Dip, and 3M parts are ROHS3 compliant. Amphenol ICC BERGSTIK® parts are RoHS compliant with REACH affected status noted for regulatory documentation.

Q: What is the difference between tin and gold plating on mating contacts?

A: The original M20-9731546 uses tin plating on both mating and post contacts. All substitute parts use gold plating on mating contacts with tin plating on posts. Gold plating provides superior corrosion resistance and lower contact resistance, improving long-term reliability in environmental exposure conditions.

Q: Can I use these parts interchangeably in the same design?

A: Yes, for standard board-to-board applications. However, if your design specifies exact current rating (3A), operating temperature range, or contact material requirements, selection should be limited to parts meeting those specifications. Verify mating connector compatibility, as contact length variations may affect mating force and connector engagement depth.

Q: What is the significance of the "breakaway" vs. standard "header" connector type?

A: Breakaway connectors feature perforated sections allowing individual pins or groups of pins to be separated after assembly. Standard headers do not have this feature. The original M20-9731546 is cuttable, while Molex substitutes are breakaway. Both designs accommodate single-row 15-position configurations on standard PCB footprints.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message