M20-9772846 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9772846 is a through-hole rectangular connector header with 28 positions at 0.100" (2.54mm) pitch. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement. The connector features male pins, unshrouded design, and solder termination suitable for board-to-board or cable applications. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter tolerances.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9772846
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	28
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Contact Length - Mating	0.228" (5.80mm)
Contact Length - Post	0.122" (3.10mm)
Insulation Height	0.100" (2.54mm)
Contact Shape	Square
Contact Finish - Mating	Tin
Contact Material	Brass
Insulation Material	Polyamide (PA6T), Nylon 6T
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
Current Rating	3A per Contact
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the M20-9772846 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Pitch - Mating: 0.100" (2.54mm) - exact match required
Number of Positions: 28 - 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
Connector Type: Header (Cuttable or Breakaway acceptable)
Fastening Type: Push-Pull - exact match required
Contact Shape: Square - exact match required
Material Flammability Rating: UL94 V-0 - exact match required
RoHS Status: ROHS3 Compliant - exact match required

Substitutes are divided into two categories:

Category A - Direct Position Match (28 positions): Molex 0022284280, 0022284283, 0022285280; Sullins PBC28SAAN, PBC28SABN, PBC28SACN, PBC28SADN, PBC28SAEN, PBC28SAFN

Category B - Extended Position Match (32 positions): Harwin M20-9773246 (for applications where additional positions are acceptable)

Parameter Comparison

Parameter	M20-9772846 (Main)	M20-9773246	0022284280	0022284283	0022285280	PBC28SAAN	PBC28SABN	PBC28SACN	PBC28SADN	PBC28SAEN	PBC28SAFN
Manufacturer	Harwin Inc.	Harwin Inc.	Molex	Molex	Molex	Sullins	Sullins	Sullins	Sullins	Sullins	Sullins
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	28	32	28	28	28	28	28	28	28	28	28
Number of Rows	1	1	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	Male Pin	Male Pin
Connector Type	Header, Cuttable	Header, Cuttable	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway
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	Kinked Pin, 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 Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Tin	Tin	Tin	Gold	Tin	Gold	Gold	Gold	Gold	Gold	Gold
Contact Material	Brass	Brass	Not Specified	Not Specified	Not Specified	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Polyamide (PA), Nylon, Glass Filled	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	Not Specified	Not Specified	Not Specified	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°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	UL94 V-0	UL94 V-0
Current Rating	3A per Contact	3A per Contact	Not Specified	Not Specified	Not Specified	3A	3A	3A	3A	3A	3A
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable	Not Applicable
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (28-Position Requirement):

Molex 0022285280 is the primary substitute for the M20-9772846. This part maintains exact position count, pitch, and termination specifications. The kinked pin termination provides enhanced mechanical stability during solder reflow. All substitute parts listed in Category A meet ROHS3 compliance and UL94 V-0 flammability requirements.

Sullins PBC28 series connectors (SAAN, SABN, SACN, SADN, SAEN, SAFN) offer extended operating temperature range (-65°C ~ 125°C) compared to the original part (-40°C ~ 105°C). These parts differ in contact post length, enabling accommodation of varying PCB thicknesses and application geometries. All Sullins variants employ phosphor bronze contacts with gold mating finish, providing superior corrosion resistance compared to tin-plated brass contacts in the original design.

For Extended Position Applications:

Harwin M20-9773246 provides a direct manufacturer alternative with 32 positions at identical pitch and electrical specifications. This part is suitable only when application design permits additional connector positions.

Compliance Considerations:

All listed substitutes maintain ROHS3 compliance and UL94 V-0 flammability certification. Molex parts carry REACH Unaffected status. Sullins parts carry REACH Unaffected status. Selection should prioritize active product status for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can Molex 0022284280 and 0022284283 be used interchangeably with M20-9772846?

A: Both Molex parts maintain the required 28-position, 2.54mm pitch, and through-hole solder termination specifications. The primary difference is contact finish: 0022284280 features tin mating finish, while 0022284283 features gold mating finish. Both are electrically and mechanically compatible with the original part.

Q: What is the difference between Sullins PBC28SAAN, PBC28SABN, PBC28SACN, PBC28SADN, PBC28SAEN, and PBC28SAFN?

A: All six Sullins variants maintain identical pitch, position count, and electrical specifications. The suffix designation indicates contact post length: SAAN (0.120"), SABN (0.230"), SACN (0.320"), SADN (0.420"), SAEN (0.520"), SAFN (0.620"). Selection depends on required PCB thickness accommodation and application geometry.

Q: Why do Molex parts show "Not Specified" for operating temperature?

A: Operating temperature data is not provided in the Molex part specifications. Design decisions requiring temperature range confirmation should reference Molex technical documentation or contact the manufacturer directly.

Q: Is the Harwin M20-9773246 (32-position) a suitable replacement for the 28-position M20-9772846?

A: The M20-9773246 maintains identical electrical and mechanical specifications at 2.54mm pitch with through-hole solder termination. It is suitable only for applications where the additional four positions do not create design conflicts or where the extra positions can be left unpopulated.

Q: What is the significance of "Breakaway" versus "Cuttable" connector type?

A: Both designations indicate the connector can be separated into individual positions. Breakaway connectors (Molex, Sullins) feature designed break points between positions. Cuttable connectors (Harwin) can be cut at any position. Both types are mechanically and electrically compatible for 28-position applications.

Q: Do all substitutes maintain the same current rating as the original M20-9772846?

A: The original part specifies 3A per contact. Sullins parts explicitly specify 3A per contact. Molex parts do not provide current rating specifications in the available data. Applications requiring confirmed 3A per contact rating should prioritize Sullins or Harwin alternatives.

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