Molex 0901200960 Equivalent & Substitute Parts

Part Overview

The Molex 0901200960 is a vertical rectangular connector header with 40 positions at 2.54mm pitch, designed for through-hole mounting and board-to-board or cable applications. This connector is classified as Active product status and is RoHS3 compliant. Substitute parts become necessary when the primary part faces supply constraints, when design requirements demand specific material or contact finish properties, or when legacy system compatibility requires alternative manufacturers' equivalent designs.

Substiute Parts

0901200960

MolexIn Stock: 8270901200960 Datasheet

Current PartRFQ

4-103239-0

TE Connectivity AMP ConnectorsIn Stock: 37784-103239-0 Datasheet

MFR RecommendedRFQ

M20-9994045

Harwin Inc.In Stock: 9080M20-9994045 Datasheet

MFR RecommendedRFQ

M20-9994046

Harwin Inc.In Stock: 2582M20-9994046 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0901200960 is determined by the following critical parameters:

• Pitch and Position Count: All substitute parts must maintain 0.100" (2.54mm) mating pitch with 40 positions in a single row configuration
• Mounting and Termination: Through-hole solder termination is required for all substitutes
• Connector Type: Header configuration with male pin contacts for board-to-board or cable applications
• Compliance Requirements: RoHS3 compliance and UL94 V-0 flammability rating are mandatory for direct substitution
• Operating Temperature: The original part operates from -55°C to 125°C; substitutes with narrower temperature ranges may require design review
• Contact Material and Finish: Gold-plated mating surfaces are standard; variations in post finish (tin vs. tin-lead) and contact material (brass vs. copper alloy) are acceptable within the same functional class

The three substitute parts listed (4-103239-0, M20-9994045, M20-9994046) meet the core electrical and mechanical requirements but differ in specific material compositions, temperature ratings, and product status classifications.

Parameter Comparison

Engineering Selection Recommendations

Molex 0901200960 (Primary Part) Active product status with full RoHS3 compliance and extended operating temperature range (-55°C to 125°C) makes this the preferred choice for new designs and applications requiring maximum thermal performance. Brass contact material with gold mating finish and tin post finish provides standard reliability characteristics.

TE Connectivity 4-103239-0 This part carries Obsolete product status and lacks RoHS3 compliance designation. The tin-lead post finish indicates legacy manufacturing processes. Selection of this substitute should be limited to legacy system maintenance or applications where existing inventory must be consumed. The narrower operating temperature range (-65°C to 105°C) and copper alloy contact material represent functional equivalence but with reduced compliance standing.

Harwin M20-9994045 Active product status with ROHS3 compliance and cuttable header design provides an alternative for applications requiring modular connector configurations. Operating temperature range of -40°C to 105°C is narrower than the primary part. Brass contact material with gold mating finish and unspecified post finish are acceptable for general-purpose applications. Current rating of 3A per contact is explicitly defined.

Harwin M20-9994046 Active product status with ROHS3 compliance and cuttable header design. Tin mating finish (versus gold) represents a material variation that may affect contact resistance characteristics in high-reliability applications. Operating temperature range (-40°C to 105°C) and brass contact material are equivalent to M20-9994045. Current rating of 3A per contact is specified. Selection of this variant should account for the tin mating surface finish difference.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 4-103239-0 be used in new production designs? A: The TE Connectivity 4-103239-0 is classified as Obsolete and lacks RoHS3 compliance. It is not recommended for new production designs. Use only for legacy system maintenance or inventory consumption in existing products.

Q: What is the primary difference between the Harwin M20-9994045 and M20-9994046? A: Both parts are functionally equivalent with identical mechanical and electrical specifications. The primary difference is the contact finish on the mating surface: M20-9994045 features gold plating, while M20-9994046 features tin plating. Gold-plated contacts typically provide superior corrosion resistance and lower contact resistance.

Q: Are the Harwin M20 series connectors compatible with the Molex 0901200960 in terms of mating? A: Yes. Both the Molex 0901200960 and Harwin M20 series maintain the same 0.100" (2.54mm) pitch and 40-position configuration. Mechanical mating compatibility is assured. However, the Harwin parts feature cuttable headers versus the Molex breakaway design, which may affect application-specific requirements.

Q: What is the significance of the operating temperature range differences? A: The Molex 0901200960 operates from -55°C to 125°C, while the Harwin M20 series and TE Connectivity parts operate from -40°C to 105°C. If the application requires operation below -40°C or above 105°C, only the Molex part is suitable. For applications within the -40°C to 105°C range, all active parts are acceptable.

Q: Does the contact material difference (brass vs. copper alloy) affect substitution eligibility? A: Both brass and copper alloy contact materials meet the functional requirements for this connector class. The TE Connectivity 4-103239-0 uses copper alloy, while Molex and Harwin parts use brass. This difference does not prevent substitution but should be noted for applications with specific material compatibility requirements.

Q: Are all substitute parts RoHS3 compliant? A: No. The Molex 0901200960 and both Harwin M20 series parts (M20-9994045 and M20-9994046) are ROHS3 compliant. The TE Connectivity 4-103239-0 has "Not applicable" RoHS status due to its Obsolete classification. For applications requiring RoHS3 compliance, use only the Molex or Harwin parts.

Q: What does "Cuttable" versus "Breakaway" mean for the header connector type? A: Breakaway headers (Molex 0901200960) feature pre-scored sections that allow individual pins or groups of pins to be separated by breaking along the score lines. Cuttable headers (Harwin M20 series) allow custom pin configurations to be achieved by cutting the connector to the desired length. Both designs provide modularity but through different mechanical approaches.