M20-9712946 Equivalent & Substitute Parts

Part Overview

The M20-9712946 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle mounting with 29 positions at 0.100" (2.54mm) pitch. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support, maintenance, and production continuity. The part serves board-to-board and cable connection applications with male pin contacts and solder termination.

Substiute Parts

M20-9712946

Harwin Inc.In Stock: 732M20-9712946 Datasheet

Current PartRFQ

0022288290

MolexIn Stock: 8210022288290 Datasheet

MFR RecommendedRFQ

0022288292

MolexIn Stock: 8400022288292 Datasheet

MFR RecommendedRFQ

890-80-029-20-002101

Preci-DipIn Stock: 684890-80-029-20-002101 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M20-9712946 is determined by the following critical parameters:

• Connector Configuration: 29-position, single-row header with 0.100" (2.54mm) pitch
• Mounting Orientation: Through-hole, right-angle mounting
• Contact Type: Male pin with solder termination
• Electrical Performance: 3A current rating per contact
• Compliance: UL94 V-0 flammability rating and ROHS3 compliance
• Environmental: Operating temperature range and moisture sensitivity level (MSL 1)

All identified substitute parts meet these core substitution criteria. Variations in contact length, insulation height, and contact finish options are within acceptable tolerances for this connector category and do not prevent functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Molex KK254 Series)

The Molex parts 0022288290 and 0022288292 are active production components within the KK254 series, offering direct functional equivalence to the obsolete M20-9712946. Both parts maintain the critical 29-position, 2.54mm pitch configuration with through-hole, right-angle mounting and solder termination. Both are ROHS3 compliant and carry UL94 V-0 flammability certification.

The distinction between these two Molex options is the contact finish on the mating surface: 0022288290 features tin finish, while 0022288292 features gold finish. The gold-plated variant (0022288292) provides enhanced corrosion resistance and is suitable for applications requiring extended shelf life or exposure to corrosive environments.

Secondary Substitute (Preci-Dip 890 Series)

The Preci-Dip part 890-80-029-20-002101 provides an alternative with identical contact length specifications to the original M20-9712946 (0.276" mating, 0.118" post). This part operates across an extended temperature range (-55°C ~ 125°C) compared to the original specification (-40°C ~ 105°C), making it suitable for applications with more demanding thermal requirements. The Preci-Dip component is ROHS3 compliant and UL94 V-0 rated.

All three substitute parts are currently in active production with confirmed inventory availability and meet the core electrical, mechanical, and compliance requirements for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the Molex KK254 parts directly replace the Harwin M20-9712946 in existing designs?

A: Yes. Both Molex parts (0022288290 and 0022288292) maintain the same 29-position, 2.54mm pitch configuration, through-hole right-angle mounting, and solder termination as the original. The minor variations in contact length (0.244" vs. 0.276" mating) and insulation height (0.098" vs. 0.100") are within acceptable mechanical tolerances for this connector category and do not affect PCB layout or mating compatibility.

Q: What is the difference between the two Molex substitute parts?

A: The primary difference is the contact finish on the mating surface. Part 0022288290 uses tin finish, while 0022288292 uses gold finish. Gold-plated contacts provide superior corrosion resistance and are recommended for applications with extended storage periods, high-humidity environments, or where contact reliability over time is critical. Both parts are electrically and mechanically equivalent otherwise.

Q: Should I select the Preci-Dip part over the Molex alternatives?

A: The Preci-Dip 890-80-029-20-002101 is appropriate when the extended operating temperature range (-55°C ~ 125°C) is required. For standard applications within the -40°C ~ 105°C range, the Molex parts offer equivalent performance with broader market availability. The Preci-Dip part matches the original contact length specifications exactly, which may be preferable for designs with tight mechanical constraints.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three substitute parts are ROHS3 compliant and carry UL94 V-0 flammability certification, matching the compliance profile of the original M20-9712946.

Q: What is the MSL rating for these connectors?

A: All parts, including the original and all substitutes, carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.