M20-9733245 Equivalent & Substitute Parts

Part Overview

The M20-9733245 is a vertical through-hole rectangular connector header manufactured by Harwin Inc., featuring 32 positions at 2.54mm pitch. This connector is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part is a cuttable header with unshrouded design, suitable for board-to-board or cable applications with solder termination.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9733245
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Number of Positions	32
Pitch - Mating	0.100" (2.54mm)
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Connector Type	Header, Cuttable
Shrouding	Unshrouded
Contact Finish - Mating	Gold
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 M20-9733245 is determined by the following critical parameters:

Number of positions: 32
Pitch: 0.100" (2.54mm)
Contact type: Male pin
Mounting: Through hole, solder termination
Connector style: Header, unshrouded
Fastening type: Push-pull
Insulation material compatibility: Polyamide or equivalent thermoplastic
Operating temperature range: Minimum -40°C to 105°C
Current rating: 3A per contact minimum
Material flammability: UL94 V-0

Substitute parts are grouped into two categories based on mechanical and electrical compatibility:

Category A - Direct Mechanical Equivalents (32-position, identical pitch and contact geometry): Parts that maintain the same position count, pitch, and overall contact dimensions, allowing direct PCB footprint compatibility.

Category B - Functional Equivalents (32-position, 2.54mm pitch, alternative contact geometry): Parts that maintain electrical and positional compatibility but with different contact shapes or insulation heights, requiring design verification for mechanical fit.

Parameter Comparison

Parameter	M20-9733245 (Main)	0022284324 (Molex)	0901200792 (Molex)	77311-124-32LF (Amphenol)	77311-127-32LF (Amphenol)	890-18-032-10-002101 (Preci-Dip)	BBS-132-G-A (Samtec)	BBS-132-T-A (Samtec)	MTSW-132-08-F-S-300 (Samtec)
Number of Positions	32	32	32	32	32	32	32	32	32
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)
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
Connector Type	Header, Cuttable	Header, Breakaway	Header, Breakaway	Header	Header	Header	Header	Header	Header, Cuttable
Shrouding	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded	Unshrouded
Contact Finish - Mating	Gold	Gold	Gold	Gold or Gold, GXT™	Gold or Gold, GXT™	Gold	Gold	Tin	Gold
Contact Shape	Square	Square	Square	Square	Square	Square	Circular	Circular	Square
Insulation Height	0.100" (2.54mm)	0.090" (2.29mm)	0.098" (2.50mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.211" (5.35mm)	0.211" (5.35mm)	0.100" (2.54mm)
Operating Temperature	-40°C ~ 105°C	-	-55°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Current Rating	3A per Contact	-	-	3A per Contact	3A per Contact	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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

The 0901200792 (Molex C-Grid III 90120) and 890-18-032-10-002101 (Preci-Dip 890 series) are the most direct functional equivalents. Both maintain 32-position, 2.54mm pitch configuration with square contact geometry and identical insulation height to the M20-9733245. Both are active products with ROHS3 compliance and extended operating temperature ranges (-55°C to 125°C), exceeding the original part's specification. The 0901200792 features brass contact material matching the original, while the 890-18-032-10-002101 provides additional voltage rating specification (150VDC).

The 77311-124-32LF and 77311-127-32LF (Amphenol ICC BERGSTIK® series) offer active product status with RoHS compliance and extended temperature range. These parts feature phosphor bronze contacts and square geometry compatible with the original footprint, though contact length variations require verification.

Secondary Substitutes (Functional Equivalence with Design Considerations):

The 0022284324 (Molex KK254 series) maintains 32-position, 2.54mm pitch with square contacts but features reduced insulation height (0.090" vs. 0.100"), requiring PCB layout verification. This part is active and ROHS3 compliant.

The MTSW-132-08-F-S-300 (Samtec Flex Stack) provides cuttable header functionality matching the original design intent, with active status and ROHS3 compliance. Extended contact length (0.300" mating) requires mechanical clearance verification.

Alternative Consideration (Different Contact Geometry):

The BBS-132-G-A and BBS-132-T-A (Samtec BBS series) feature circular contact geometry and significantly increased insulation height (0.211" vs. 0.100"), representing a different mechanical form factor. These parts are suitable only if PCB footprint and mating connector compatibility can accommodate the dimensional differences. Both are active products with ROHS3 compliance.

Compliance Status:

All recommended substitutes maintain ROHS3 compliance and UL94 V-0 flammability rating where specified. The original M20-9733245 obsolete status necessitates transition to active product lines for long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace M20-9733245 with any of these substitute parts?

A: Direct replacement depends on PCB footprint design. Parts with matching insulation height (0.100" / 2.54mm) and square contact geometry—including 0901200792, 77311-124-32LF, 77311-127-32LF, 890-18-032-10-002101, and MTSW-132-08-F-S-300—offer the highest compatibility. Parts with different insulation heights (0022284324 at 0.090", BBS series at 0.211") require design verification.

Q: What is the significance of contact shape differences?

A: The original M20-9733245 features square contacts. Substitute parts maintain square geometry except for the BBS series (circular contacts). Contact shape affects mating connector compatibility and insertion force characteristics. Verify mating connector specifications before substitution.

Q: Why do some substitute parts have higher operating temperature ranges?

A: The M20-9733245 specifies -40°C to 105°C. Substitute parts with extended ranges (-55°C to 125°C) represent improved material formulations and manufacturing processes in active product lines. Extended range does not affect compatibility but provides additional design margin for demanding applications.

Q: Are there differences in contact finish that affect performance?

A: The M20-9733245 specifies gold mating contact finish. Most substitutes maintain gold finish. The BBS-132-T-A features tin finish, which is acceptable for general-purpose applications but may have different contact resistance characteristics. Verify contact finish requirements for your specific application.

Q: What does "cuttable" or "breakaway" connector type mean?

A: Cuttable headers (M20-9733245, MTSW-132-08-F-S-300) allow individual pins to be separated after assembly. Breakaway headers (0022284324, 0901200792) feature perforated sections for manual separation. Both designs provide flexibility for custom pin configurations.

Q: How do I verify mechanical compatibility with my PCB design?

A: Compare the following parameters: number of positions (all substitutes are 32), pitch (all are 2.54mm), insulation height, contact length, and overall connector height. Measure clearance to adjacent components, particularly for BBS series with 0.211" insulation height.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitutes are either ROHS3 compliant or RoHS compliant, meeting regulatory requirements for lead-free manufacturing.

Q: What is the inventory status for these substitute parts?

A: All substitute parts listed are active products with current inventory availability ranging from 735 to 4368 pieces, ensuring supply continuity compared to the obsolete M20-9733245.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message