M20-9771546 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9771546 is a rectangular connector header with 15 vertical positions at 0.100" (2.54mm) pitch, designed for through-hole mounting with solder termination. This connector is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain functional compatibility for board-to-board or cable applications. Substitute parts must preserve the core electrical and mechanical characteristics while offering active product status and continued availability.

Key Parameters

Parameter	M20-9771546 Specification
Manufacturer	Harwin Inc.
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	15
Pitch - Mating	0.100" (2.54mm)
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Contact Shape	Square
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

Substitute parts for the M20-9771546 are grouped based on strict adherence to the following critical parameters:

Primary Matching Criteria:

Number of Positions: 15
Pitch - Mating: 0.100" (2.54mm)
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Contact Shape: Square
Material Flammability Rating: UL94 V-0
RoHS Status: ROHS3 Compliant or RoHS Compliant

Secondary Compatibility Parameters:

Connector Type: Header (Cuttable, Breakaway, or standard Header)
Insulation Material: Polyamide, Nylon, or Thermoplastic variants
Operating Temperature Range: Must encompass or match the original -40°C ~ 105°C
Current Rating: 3A per Contact or higher

Substitute parts meeting these criteria are functionally equivalent for board-to-board and cable interconnect applications. Variations in contact finish (Tin vs. Gold), contact length dimensions, and post length do not preclude substitution when the primary electrical and mechanical parameters align.

Parameter Comparison

Parameter	M20-9771546 (Main)	M20-9771646	0022284150	0022284153	77311-102-15LF	MTSW-115-24-F-S-230	TSW-115-07-F-S
Manufacturer	Harwin Inc.	Harwin Inc.	Molex	Molex	Amphenol ICC (FCI)	Samtec Inc.	Samtec Inc.
Number of Positions	15	16	15	15	15	15	15
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)
Contact Type	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
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Contact Shape	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Tin	Tin	Tin	Gold	Gold or Gold, GXT™	Gold	Gold
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	Not Specified	Not Specified	-65°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	3A per Contact	3A per Contact	Not Specified	Not Specified	3A per Contact	3A	Not Specified
Material Flammability Rating	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	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent (Same Position Count):

The following parts provide direct substitution with identical 15-position configuration:

0022284150 (Molex KK254): Active product status with ROHS3 compliance. Maintains 15-position, 2.54mm pitch, male pin, through-hole solder termination, and square contact geometry. Tin contact finish on mating surface aligns with original specification.
0022284153 (Molex KK254): Active product status with ROHS3 compliance. Identical to 0022284150 except for gold contact finish on mating surface, providing enhanced corrosion resistance. Suitable for applications requiring improved contact reliability.
77311-102-15LF (Amphenol ICC BERGSTIK®): Active product status with RoHS compliance. Maintains all critical parameters with gold contact finish and extended operating temperature range (-65°C ~ 125°C). Phosphor bronze contact material provides superior durability.
MTSW-115-24-F-S-230 (Samtec Flex Stack): Active product status with ROHS3 compliance. Cuttable header configuration with gold contact finish and extended operating temperature range (-55°C ~ 125°C). Phosphor bronze contact material.
TSW-115-07-F-S (Samtec TSW): Active product status with ROHS3 compliance. Standard header configuration with gold contact finish and extended operating temperature range (-55°C ~ 125°C). Phosphor bronze contact material.

Alternative Configuration (16-Position):

M20-9771646 (Harwin M20 Series): Active product status with ROHS3 compliance. Provides 16-position variant of the same Harwin M20 series. Suitable only when application design accommodates additional position or when one position remains unused.

All substitute parts maintain UL94 V-0 flammability rating and are compliant with applicable regulatory standards. Selection should be based on specific application requirements regarding contact finish, operating temperature range, and connector type (cuttable vs. standard header).

Frequently Asked Questions (FAQ)

Q: Can the M20-9771546 be directly replaced with the M20-9771646?

A: The M20-9771646 is a 16-position variant of the same Harwin M20 series. Direct replacement is possible only if the application design accommodates the additional position or if the extra position remains unused. All other electrical and mechanical parameters are equivalent.

Q: What is the difference between tin and gold contact finishes?

A: The original M20-9771546 specifies tin contact finish on the mating surface. Substitute parts with gold contact finish (0022284153, 77311-102-15LF, MTSW-115-24-F-S-230, TSW-115-07-F-S) provide enhanced corrosion resistance and improved contact reliability, particularly in environments with moisture or corrosive atmospheres. Tin-finished alternatives (0022284150) maintain the original specification.

Q: Are there operating temperature differences between substitute parts?

A: The original M20-9771546 operates from -40°C to 105°C. Substitute parts from Amphenol ICC and Samtec extend this range to -55°C ~ 125°C or -65°C ~ 125°C, providing broader thermal capability. Molex alternatives do not specify operating temperature. For applications within the original -40°C ~ 105°C range, all substitutes are functionally equivalent.

Q: What does "cuttable" connector type mean?

A: Cuttable connectors (M20-9771546, M20-9771646, MTSW-115-24-F-S-230) allow individual positions to be separated or trimmed to reduce the connector footprint. Standard header types (0022284150, 0022284153, 77311-102-15LF, TSW-115-07-F-S) maintain the full connector assembly without this capability.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts are ROHS3 compliant (Harwin M20-9771646, Molex 0022284150 and 0022284153, Samtec MTSW-115-24-F-S-230 and TSW-115-07-F-S). Amphenol ICC parts (77311-102-15LF) are RoHS compliant but not specifically ROHS3 certified. For applications requiring ROHS3 compliance, select from Harwin, Molex, or Samtec alternatives.

Q: What is the current rating for each substitute part?

A: The original M20-9771546 and most substitutes (M20-9771646, 77311-102-15LF, MTSW-115-24-F-S-230) are rated for 3A per contact. Molex parts (0022284150, 0022284153) and Samtec TSW-115-07-F-S do not specify current rating in the provided data. For applications requiring explicit 3A per contact rating, select from Harwin, Amphenol ICC, or Samtec MTSW series.

Q: Can I use a 15-position connector in place of the original if my design only uses 14 positions?

A: Yes. All 15-position substitute parts are functionally compatible with designs using 14 or fewer positions. The unused position remains unconnected without affecting circuit operation.

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