Molex 0901200772 Equivalent & Substitute Parts

Part Overview

The Molex 0901200772 is a vertical header connector with 12 positions at 2.54mm pitch, designed for through-hole board-to-board or cable applications. This connector features male pins with gold-plated mating contacts and tin-plated posts, housed in a black polyester glass-filled insulation body. The part is currently active in production with 678 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers offer equivalent performance at different price points, or when design requirements allow for compatible alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	0901200772
Manufacturer	Molex
Series	C-Grid III 90120
Connector Type	Header, Breakaway
Number of Positions	12
Pitch - Mating	0.100" (2.54mm)
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Contact Finish - Mating	Gold
Contact Finish - Post	Tin
Operating Temperature Range	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0901200772 is determined by the following critical parameters:

Primary Matching Criteria:

12 positions at 0.100" (2.54mm) pitch
Male pin contact type
Through-hole solder termination
Header connector configuration
Board-to-board or cable style application

Secondary Compatibility Parameters:

Operating temperature range (minimum -55°C to 125°C or equivalent)
UL94 V-0 flammability rating
Contact finish materials (gold mating surface acceptable)
Connector type (breakaway or cuttable headers acceptable)

The substitute parts listed below meet these core electrical and mechanical requirements. Parts with different position counts, pitch specifications, or contact configurations are excluded from direct substitution.

Parameter Comparison

Parameter	Molex 0901200772	TE 1-826629-2	3M 929834-01-12-RK	3M 929834-02-12	Harwin M20-9731245	Harwin M20-9991245	Harwin M20-9991246	Samtec MTSW-112-08-G-S-250	Samtec TSW-112-24-L-S
Positions	12	12	12	12	12	12	12	12	12
Pitch (mm)	2.54	2.54	2.54	2.54	2.54	2.54	2.54	2.54	2.54
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting	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
Contact Finish - Mating	Gold	Gold	Tin	Tin-Lead	Gold	Gold	Tin	Gold	Gold
Contact Finish - Post	Tin	Tin	Tin	Not Specified	Not Specified	Not Specified	Tin	Gold	Tin
Operating Temperature	-55°C ~ 125°C	-65°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C
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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

TE Connectivity 1-826629-2 and Samtec TSW-112-24-L-S represent the closest functional equivalents. Both maintain the full operating temperature range of -55°C to 125°C, matching the Molex part's thermal specifications. Both are ROHS3 compliant and carry active product status. The TE part offers 8,378 units in stock, providing supply security. The Samtec TSW series maintains identical pitch, position count, and contact configuration with gold mating finish.

Samtec MTSW-112-08-G-S-250 also matches the full temperature range and offers gold plating on both mating and post contacts, with 942 units available.

Secondary Substitutes (Acceptable with Design Review):

Harwin M20-9731245, M20-9991245, and M20-9991246 are cuttable header variants with ROHS3 compliance and active status. These parts operate at -40°C to 105°C, which is narrower than the primary part but suitable for applications not requiring the extended low-temperature performance. Harwin parts offer 3A per contact current rating and are available in quantities exceeding 1,300 units.

3M 929834-01-12-RK operates at -40°C to 105°C with tin mating finish and 2.5A current rating. This part is RoHS compliant and active.

Not Recommended:

3M 929834-02-12 is RoHS non-compliant and should not be selected for new designs requiring ROHS3 compliance.

TE Connectivity 4-103185-0 is marked obsolete and should not be used as a primary substitute despite meeting position and pitch requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the Molex 0901200772 with any 12-position 2.54mm pitch header?

A: No. While pitch and position count are necessary criteria, substitution also requires matching contact type (male pin), mounting method (through-hole), termination (solder), and connector style (header). Additionally, operating temperature range, flammability rating, and RoHS compliance must align with your application requirements.

Q: What is the difference between breakaway and cuttable headers?

A: Both connector types are mechanically compatible for board-to-board applications. Breakaway headers feature pre-defined separation points, while cuttable headers allow custom positioning of the break point. This distinction does not affect electrical performance or mating compatibility.

Q: Why do some substitutes have a narrower operating temperature range?

A: The Molex 0901200772 operates from -55°C to 125°C. Some alternatives, such as the 3M and Harwin parts, operate from -40°C to 105°C. If your application requires operation below -40°C or above 105°C, these parts are not suitable. Verify your application's thermal requirements before selection.

Q: Are gold-plated and tin-plated mating contacts interchangeable?

A: Gold and tin mating finishes have different electrical and corrosion properties. The Molex part uses gold mating finish. Substitutes with tin mating finish (such as 3M 929834-01-12-RK) may be used if your design does not require gold's superior corrosion resistance or if contact resistance specifications are met. Consult your application requirements.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive 3, restricting lead, cadmium, mercury, and other hazardous materials. If your application or market requires RoHS compliance, select only parts marked ROHS3 Compliant or RoHS Compliant. Avoid parts marked as non-compliant or not applicable.

Q: Is the TE Connectivity 4-103185-0 a valid substitute?

A: No. Although this part meets position and pitch specifications, it is marked obsolete and carries 40 positions instead of 12. It is not a direct substitute for the Molex 0901200772.

Q: How do I verify physical compatibility before ordering?

A: Confirm that the substitute part's overall contact length, insulation height, and post length are compatible with your PCB layout and mating connector. Review the detailed mechanical drawings provided by the manufacturer. Contact length variations may affect mating force and connector alignment.

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