Molex 0901200923 Equivalent & Substitute Parts

Part Overview

The Molex 0901200923 is a rectangular connector header designed for through-hole mounting applications. This vertical 3-position connector operates at 0.100" (2.54mm) pitch and is part of the C-Grid III 90120 series. The part maintains active product status with 1426 units in current inventory. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling direct board-level replacement without design modification.

Key Parameters

Parameter	Value
Manufacturer Part Number	0901200923
Manufacturer	Molex
Series	C-Grid III 90120
Connector Type	Header, Breakaway
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	3
Number of Rows	1
Mounting Type	Through Hole
Termination	Solder
Contact Shape	Square
Contact Finish - Mating	Gold
Contact Material	Brass
Insulation Material	Polyester, Glass Filled
Operating Temperature	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
Insulation Color	Black
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the Molex 0901200923 are qualified based on the following critical parameters that must align with the original specification:

Mandatory Matching Parameters:

Pitch - Mating: 0.100" (2.54mm)
Number of Positions: 3
Number of Rows: 1
Connector Type: Header with Male Pin contacts
Mounting Type: Through Hole
Termination: Solder
Contact Shape: Square
Material Flammability Rating: UL94 V-0
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

Contact Finish - Mating: Gold or Tin (both acceptable for signal integrity)
Contact Material: Brass, Copper Alloy, or Phosphor Bronze (all suitable for electrical performance)
Insulation Material: Polyester Glass Filled, Thermoplastic, Liquid Crystal Polymer (LCP), or Polybutylene Terephthalate (PBT)
Operating Temperature Range: Must encompass or exceed -55°C ~ 125°C
Contact Length dimensions: Minor variations acceptable within mechanical envelope constraints
Insulation Height: Minor variations acceptable

Substitutes are grouped by manufacturer and series to facilitate sourcing decisions while maintaining functional equivalence.

Parameter Comparison

Parameter	Molex 0901200923	TE 4-103239-0-03	TE 5-146281-3	Amphenol 77311-424-03LF	TE 826629-3	Amphenol 861400031YO8LF	Hirose A2-3PA-2.54DSA(71)	Harwin M20-9730345	Harwin M20-9990345	Harwin M20-9990346	Sullins PBC03SABN
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	3	3	3	3	3	3	3	3	3	3	3
Number of Rows	1	1	1	1	1	1	1	1	1	1	1
Connector Type	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header	Header, Breakaway	Header, Breakaway	Header	Header, Cuttable	Header, Cuttable	Header, Cuttable	Header, Breakaway
Contact Type	Male Pin	Male Pin	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	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Tin	Gold	Gold or Gold, GXT™	Gold	Gold	Gold	Tin	Gold
Contact Material	Brass	Copper Alloy	Copper Alloy	Phosphor Bronze	Brass	Copper Alloy	Brass	Brass	Brass	Brass	Phosphor Bronze
Insulation Material	Polyester, Glass Filled	Thermoplastic	Liquid Crystal Polymer (LCP)	Thermoplastic	Polybutylene Terephthalate (PBT)	Thermoplastic	Polybutylene Terephthalate (PBT)	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polybutylene Terephthalate (PBT)
Operating Temperature	-55°C ~ 125°C	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 125°C	-65°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°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
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compliance):

TE Connectivity 5-146281-3 and Harwin M20-9990345 represent the most direct substitutes. Both maintain ROHS3 compliance, active product status, and operating temperature ranges compatible with the original specification. TE 5-146281-3 offers identical pitch, position count, and contact configuration with Liquid Crystal Polymer insulation. Harwin M20-9990345 provides equivalent electrical performance with cuttable header design and polyamide insulation, supported by 158,887 units in inventory.

Secondary Substitutes (Active Status, Compliance Variations):

Amphenol 861400031YO8LF and Harwin M20-9730345 maintain active status and RoHS compliance. Amphenol 861400031YO8LF extends operating temperature to -55°C ~ 125°C matching the original, with 8,242 units available. Harwin M20-9730345 offers similar electrical characteristics with 9,477 units in stock.

Conditional Substitutes (Compliance or Status Limitations):

TE Connectivity 4-103239-0-03 carries obsolete product status and RoHS non-compliance, limiting suitability for new designs. Hirose A2-3PA-2.54DSA(71) operates at reduced maximum temperature (-55°C ~ 85°C), unsuitable for applications requiring full -55°C ~ 125°C range. Amphenol 77311-424-03LF uses tin mating finish instead of gold, acceptable for general-purpose applications but not recommended for high-reliability signal paths.

Inventory Considerations:

Harwin M20-9990345 provides exceptional inventory depth (158,887 units), ensuring supply continuity. TE 5-146281-3 (3,700 units) and Amphenol 861400031YO8LF (8,242 units) offer substantial availability for production requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the Molex 0901200923 with any of these parts directly on the PCB?

A: Direct substitution is possible for parts matching the core parameters: 0.100" (2.54mm) pitch, 3-position single-row configuration, through-hole solder termination, and square contact geometry. All listed substitutes meet these criteria. Physical envelope differences in contact length and insulation height are minor and do not affect board-level compatibility.

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

A: Gold-plated contacts (Molex 0901200923, TE 5-146281-3, Harwin M20-9990345) provide superior corrosion resistance and lower contact resistance, preferred for signal integrity and long-term reliability. Tin-plated contacts (Harwin M20-9990346, Amphenol 77311-424-03LF) are acceptable for general-purpose applications with adequate environmental protection. Both finishes meet UL94 V-0 flammability requirements.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range must encompass the application's thermal requirements. The original Molex part operates -55°C ~ 125°C. Substitutes with narrower ranges (TE 4-103239-0-03 and TE 5-146281-3 at -65°C ~ 105°C, Hirose A2-3PA-2.54DSA(71) at -55°C ~ 85°C) are unsuitable for applications requiring the full original temperature envelope. Harwin and Amphenol 861400031YO8LF parts match or exceed the original range.

Q: What does RoHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. For new designs and regulated applications, ROHS3-compliant substitutes (TE 5-146281-3, Harwin M20-9990345, Harwin M20-9990346, Sullins PBC03SABN) are mandatory. TE 4-103239-0-03 (RoHS non-compliant) is unsuitable for new production.

Q: Are cuttable headers (Harwin M20 series) compatible with standard breakaway headers?

A: Cuttable headers feature continuous strips allowing individual position separation, while breakaway headers have pre-scored sections. Both types maintain identical pitch, contact geometry, and electrical performance. Cuttable headers offer design flexibility for custom configurations but require post-assembly processing. Breakaway headers provide immediate usability without modification.

Q: How do insulation material differences affect performance?

A: Polyester glass-filled (original), Thermoplastic, Liquid Crystal Polymer (LCP), Polybutylene Terephthalate (PBT), and Polyamide (PA6T) insulation materials all meet UL94 V-0 flammability requirements and provide adequate electrical isolation. Material selection affects mechanical properties and environmental resistance. LCP and PBT offer superior dimensional stability; polyamide provides cost efficiency. All listed materials are functionally equivalent for standard connector applications.

Q: What inventory levels should I consider for production planning?

A: Harwin M20-9990345 provides 158,887 units, suitable for high-volume production. TE 5-146281-3 (3,700 units) and Amphenol 861400031YO8LF (8,242 units) support medium-volume requirements. Molex 0901200923 (1,426 units) and Sullins PBC03SABN (4,978 units) are appropriate for lower-volume applications. Verify current inventory status with suppliers before finalizing procurement decisions.

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