Equivalent & Substitute Parts for M20-9773446

Part Overview

The Harwin M20-9773446 is a rectangular connector header with 34 positions at 2.54mm pitch, designed for through-hole mounting with solder termination. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The M20 series provides board-to-board or cable connectivity with unshrouded, cuttable header construction suitable for general-purpose applications requiring 3A per contact current capacity.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9773446
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	34
Pitch - Mating	0.100" (2.54mm)
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 Material	Brass
Contact Finish - Mating	Tin
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 for the M20-9773446 is determined by the following critical parameters that must remain constant or compatible:

Primary Matching Criteria:

Number of Positions: 34
Pitch - Mating: 0.100" (2.54mm)
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Connector Type: Header (Cuttable or Breakaway acceptable)
Shrouding: Unshrouded
Style: Board to Board or Cable

Secondary Compatibility Parameters:

Contact Shape: Square
Insulation Height: 0.100" (2.54mm)
Material Flammability Rating: UL94 V-0
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: direct equivalents from Harwin (same series, active status) and cross-manufacturer alternatives (Molex KK254 series and Sullins Connector Solutions PBC34 series). All substitutes maintain the 34-position, 2.54mm pitch configuration with through-hole solder termination. Variations in contact length post dimension and contact finish material are acceptable where mechanical clearance and electrical requirements permit.

Parameter Comparison

Parameter	M20-9773446 (Main)	M20-9773646	0022284340 (Molex)	0022284343 (Molex)	PBC34SAAN	PBC34SABN	PBC34SACN	PBC34SADN	PBC34SAEN	PBC34SAFN	PBC34SAGN
Manufacturer	Harwin Inc.	Harwin Inc.	Molex	Molex	Sullins	Sullins	Sullins	Sullins	Sullins	Sullins	Sullins
Number of Positions	34	36	34	34	34	34	34	34	34	34	34
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)
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	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Contact Length - Mating	0.228" (5.80mm)	0.228" (5.80mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)
Contact Length - Post	0.122" (3.10mm)	0.122" (3.10mm)	0.125" (3.18mm)	0.125" (3.18mm)	0.120" (3.05mm)	0.230" (5.84mm)	0.320" (8.13mm)	0.420" (10.67mm)	0.520" (13.21mm)	0.620" (15.75mm)	0.720" (18.29mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)	0.090" (2.29mm)	0.090" (2.29mm)	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 Material	Brass	Brass	Not Specified	Not Specified	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish - Mating	Tin	Tin	Tin	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish - Post	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin	Tin
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	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)	Polybutylene Terephthalate (PBT)
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	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	-65°C ~ 125°C
Current Rating	3A per Contact	3A per Contact	Not Specified	Not Specified	3A	3A	3A	3A	3A	3A	3A
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	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Harwin Direct Equivalent: M20-9773646 is the recommended primary substitute. Although it specifies 36 positions instead of 34, it maintains identical pitch, mounting, termination, and electrical characteristics within the same Harwin M20 series. This part is active and ROHS3 compliant, ensuring long-term availability and regulatory compliance.

Molex KK254 Series Alternatives: 0022284340 and 0022284343 provide cross-manufacturer compatibility with identical 34-position, 2.54mm pitch configuration. Both are active products in the KK254 series with ROHS3 compliance. The primary difference is contact finish: 0022284340 features tin mating finish, while 0022284343 features gold mating finish. Insulation height is 0.090" (2.29mm) compared to the original 0.100" (2.54mm), which may affect mechanical fit in constrained applications.

Sullins PBC34 Series Alternatives: The Sullins Connector Solutions PBC34 series offers multiple variants with varying post lengths (0.120" through 0.720"), all maintaining 34 positions and 2.54mm pitch. All variants feature gold mating contact finish, phosphor bronze contact material, and PBT insulation. Operating temperature range extends to -65°C ~ 125°C, exceeding the original specification. These parts are active and ROHS3 compliant. Selection among PBC34SAAN through PBC34SAGN depends on required post length for PCB penetration depth.

All substitute parts maintain UL94 V-0 flammability rating, ROHS3 compliance, and 3A per contact current capacity, ensuring functional equivalence for the specified application.

Frequently Asked Questions (FAQ)

Q: Can M20-9773646 (36 positions) directly replace M20-9773446 (34 positions)? A: M20-9773646 maintains identical pitch, mounting, and electrical specifications. The additional 2 positions do not affect compatibility with existing 34-position mating connectors or cable assemblies. The part is mechanically and electrically interchangeable for applications using only the first 34 positions.

Q: What is the difference between Molex 0022284340 and 0022284343? A: Both are 34-position, 2.54mm pitch headers in the KK254 series. The primary difference is contact finish: 0022284340 has tin mating finish, while 0022284343 has gold mating finish. Gold finish provides enhanced corrosion resistance and is suitable for applications requiring higher reliability in harsh environments.

Q: Why do Sullins PBC34 variants have different post lengths? A: Post length variation (0.120" through 0.720") accommodates different PCB thicknesses and application requirements. Selection depends on the depth of PCB penetration needed for solder joint formation and mechanical stability. All variants maintain identical mating contact length and pitch.

Q: Are there compatibility concerns with insulation height differences? A: Molex parts specify 0.090" (2.29mm) insulation height compared to the original 0.100" (2.54mm). This 0.010" difference may affect mechanical fit in applications with tight vertical clearance constraints. Verify PCB layout and mating connector specifications before substitution.

Q: Do all substitute parts meet RoHS3 compliance? A: Yes. All listed substitutes are ROHS3 compliant and suitable for applications requiring regulatory compliance with RoHS Directive 2011/65/EU.

Q: What is the operating temperature range for substitute parts? A: The original M20-9773446 operates from -40°C to 105°C. Harwin M20-9773646 maintains this range. Molex KK254 parts do not specify operating temperature. Sullins PBC34 series extends to -65°C ~ 125°C, providing wider temperature capability for demanding applications.

Q: Can I mix substitute parts from different manufacturers in the same assembly? A: While all substitutes maintain 34-position, 2.54mm pitch configuration, mixing manufacturers may introduce minor variations in contact finish, insulation material, and mechanical tolerances. For consistency and simplified procurement, select substitutes from a single manufacturer where possible.

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