M20-9753546 Equivalent & Substitute Parts

Part Overview

The M20-9753546 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle mounting applications. This 35-position connector operates at 0.100" (2.54mm) pitch and supports 3A per contact with an operating temperature range of -40°C to 105°C. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

M20-9753546

Harwin Inc.In Stock: 1000M20-9753546 Datasheet

Current PartRFQ

M20-9753646

Harwin Inc.In Stock: 1668M20-9753646 Datasheet

MFR RecommendedRFQ

PREC035SBAN-M71RC

Sullins Connector SolutionsIn Stock: 670PREC035SBAN-M71RC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M20-9753546 is determined by the following critical parameters:

• Pitch - Mating: 0.100" (2.54mm) — must match exactly for mechanical compatibility
• Contact Type: Male Pin — determines mating interface
• Mounting Type: Through Hole, Right Angle — required for PCB assembly orientation
• Termination: Solder — specifies connection method
• Current Rating: 3A per Contact — electrical performance requirement
• Operating Temperature: -40°C ~ 105°C — thermal operating envelope
• Material Flammability Rating: UL94 V-0 — safety compliance
• RoHS Status: ROHS3 Compliant — regulatory requirement

The M20-9753546 has two identified substitutes. The M20-9753646 differs in position count (36 vs. 35) and product status (active vs. obsolete). The PREC035SBAN-M71RC maintains the 35-position configuration with minor dimensional variations in contact length and insulation height, while using a different insulation material (PBT vs. Nylon 6T).

Parameter Comparison

Engineering Selection Recommendations

M20-9753646 (Harwin Inc., 36-position)

This substitute is manufactured by the same supplier as the original part and maintains identical electrical and thermal specifications. The primary difference is the increased position count from 35 to 36. This part is active in production, ensuring long-term availability and supply chain stability. Selection of this part requires design modification to accommodate the additional position or acceptance of an unused contact position.

PREC035SBAN-M71RC (Sullins Connector Solutions, 35-position)

This substitute maintains the exact 35-position configuration of the original part, eliminating the need for design modification. Minor dimensional variations exist in contact length (0.002" difference in mating contact, 0.002" difference in post contact) and insulation height (0.002" difference). The insulation material differs (PBT vs. Nylon 6T), though both materials meet the UL94 V-0 flammability requirement. This part is active in production and ROHS3 compliant. The dimensional tolerances fall within typical connector manufacturing specifications and do not affect electrical or thermal performance.

Frequently Asked Questions (FAQ)

Q: Can the M20-9753646 (36-position) be used as a direct replacement for the M20-9753546 (35-position)?

A: The M20-9753646 is electrically and thermally compatible but introduces an additional contact position. Direct substitution requires either design modification to utilize the 36th position or acceptance of leaving one position unused. All critical electrical parameters, current rating, operating temperature, and compliance certifications are identical.

Q: What are the implications of the dimensional differences in the PREC035SBAN-M71RC?

A: The contact length differences (0.002" in mating contact, 0.002" in post contact) and insulation height difference (0.002") are within standard connector manufacturing tolerances. These variations do not affect electrical performance, current carrying capacity, or thermal characteristics. PCB layout and mating connector compatibility should be verified for the specific application.

Q: Does the insulation material change from Nylon 6T to PBT in the PREC035SBAN-M71RC affect performance?

A: Both materials meet UL94 V-0 flammability requirements and operate across the identical temperature range (-40°C to 105°C). PBT offers different mechanical and chemical properties compared to Nylon 6T, but both are suitable for standard connector applications. Material selection should be evaluated based on specific environmental exposure and mechanical stress requirements of the application.

Q: Are both substitute parts available for immediate procurement?

A: Both M20-9753646 and PREC035SBAN-M71RC are classified as active products with current inventory availability. The original M20-9753546 is obsolete, making these substitutes necessary for new designs and ongoing production support.

Q: What compliance certifications apply to all three parts?

A: All three parts are ROHS3 compliant, REACH unaffected, and carry UL94 V-0 material flammability ratings. Moisture sensitivity level is 1 (unlimited) for all parts, indicating no special handling requirements during storage or assembly.