M20-9964046 Equivalent & Substitute Parts

Part Overview

The M20-9964046 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle mounting applications. This 40-position connector operates at 0.100" (2.54mm) pitch with male pin contacts rated for 3A per contact and operates across -40°C to 105°C. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

M20-9964046

Harwin Inc.In Stock: 1277M20-9964046 Datasheet

Current PartRFQ

M20-9963646

Harwin Inc.In Stock: 1236M20-9963646 Datasheet

MFR RecommendedRFQ

2340-5111TG

3MIn Stock: 40832340-5111TG Datasheet

MFR RecommendedRFQ

2340-5211TG

3MIn Stock: 29792340-5211TG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Connector pitch (0.100" / 2.54mm): All substitute parts maintain identical mating pitch, ensuring mechanical and electrical compatibility with existing mating connectors.
• Number of positions (40): Direct substitutes maintain 40-position configuration for pin-to-pin compatibility.
• Mounting type (Through Hole, Right Angle): All alternatives use identical through-hole, right-angle mounting geometry.
• Contact type (Male Pin): All substitutes provide male pin contacts for board-to-board or cable applications.
• Current rating (3A per Contact): All alternatives support the same current capacity per contact.
• Termination (Solder): All substitutes use solder termination for PCB attachment.
• Operating temperature range: All alternatives operate within or exceed the original -40°C to 105°C specification.
• Flammability rating (UL94 V-0): All substitutes meet or exceed the original material flammability standard.

The M20-9963646 (36-position variant) is listed as a substitute but differs in position count and is suitable only where 36 positions are acceptable.

Parameter Comparison

Engineering Selection Recommendations

Direct 40-Position Substitutes (2340-5111TG, 2340-5211TG):

The 3M 2340 series connectors (2340-5111TG and 2340-5211TG) provide full electrical and mechanical compatibility with the M20-9964046. Both maintain 40-position configuration, 0.100" pitch, through-hole right-angle mounting, and 3A current rating. Both operate across -55°C to 105°C, exceeding the original temperature specification. Both carry UL94 V-0 flammability certification.

Key differences include contact finish (gold vs. tin) and contact length specifications. The 2340-5111TG features 0.230" mating contact length, while the 2340-5211TG provides 0.318" mating contact length. Selection between these variants depends on mating connector depth requirements.

Both 3M alternatives are RoHS non-compliant, whereas the original M20-9964046 is ROHS3 compliant. This distinction is critical for applications subject to RoHS regulations.

36-Position Alternative (M20-9963646):

The M20-9963646 is an active Harwin product maintaining identical electrical and mechanical specifications to the M20-9964046 except for position count (36 vs. 40). This part is suitable only for applications where 36 positions satisfy functional requirements. The M20-9963646 is ROHS3 compliant, matching the original part's regulatory status.

Frequently Asked Questions (FAQ)

Q: Can the 3M 2340 series connectors directly replace the M20-9964046 in all applications?

A: The 2340-5111TG and 2340-5211TG provide full electrical and mechanical compatibility for applications not subject to RoHS compliance requirements. Both maintain 40-position configuration, 0.100" pitch, and 3A current rating. Contact length differences (0.230" vs. 0.318" mating length) must be evaluated against mating connector specifications. RoHS-regulated applications require the ROHS3-compliant M20-9963646 alternative.

Q: What is the difference between 2340-5111TG and 2340-5211TG?

A: Both parts are 40-position, 0.100" pitch connectors with identical electrical ratings and operating temperature ranges. The primary difference is mating contact length: 2340-5111TG provides 0.230" (5.84mm) mating contact length, while 2340-5211TG provides 0.318" (8.08mm) mating contact length. Selection depends on the depth of the mating connector cavity.

Q: Why is the M20-9963646 listed as a substitute if it has only 36 positions?

A: The M20-9963646 is listed as a manufacturer-recommended alternative for applications where 36 positions are functionally acceptable. It maintains identical electrical specifications, operating temperature range, and ROHS3 compliance status. This part is suitable for designs that can accommodate reduced pin count.

Q: Are there compliance differences between the substitute parts?

A: Yes. The M20-9964046 and M20-9963646 are both ROHS3 compliant. The 3M 2340 series (2340-5111TG and 2340-5211TG) are RoHS non-compliant. Applications subject to RoHS regulations must use either the original Harwin part or the M20-9963646 alternative.

Q: Do the contact finish differences affect electrical performance?

A: Contact finish (tin vs. gold) affects contact resistance and corrosion resistance characteristics. Gold-plated contacts (3M 2340 series) provide superior corrosion resistance and lower contact resistance compared to tin-plated contacts (Harwin M20 series). Selection depends on environmental conditions and application requirements.

Q: Can these connectors be intermated with each other?

A: All listed parts maintain 0.100" (2.54mm) pitch and male pin contact configuration, enabling mechanical mating with standard 0.100" pitch female receptacles. Electrical compatibility is maintained across all alternatives for applications not subject to RoHS compliance restrictions.