M20-9773742 Equivalent & Substitute Parts

Part Overview

The M20-9773742 is a rectangular connector header manufactured by Harwin Inc., featuring 37 positions at 0.100" (2.54mm) pitch for through-hole mounting with solder termination. This connector is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity. The part is designed for board-to-board or cable applications with unshrouded, cuttable construction and male pin contacts.

Substiute Parts

M20-9773742

Harwin Inc.In Stock: 1004M20-9773742 Datasheet

Current PartRFQ

800-10-037-10-002000

Mill-Max Manufacturing Corp.In Stock: 1079800-10-037-10-002000 Datasheet

MFR RecommendedRFQ

MTLW-137-07-F-S-250

Samtec Inc.In Stock: 991MTLW-137-07-F-S-250 Datasheet

MFR RecommendedRFQ

MTLW-137-07-F-S-255

Samtec Inc.In Stock: 830MTLW-137-07-F-S-255 Datasheet

MFR RecommendedRFQ

MTLW-137-07-F-S-260

Samtec Inc.In Stock: 1110MTLW-137-07-F-S-260 Datasheet

MFR RecommendedRFQ

MTLW-137-07-F-S-265

Samtec Inc.In Stock: 1033MTLW-137-07-F-S-265 Datasheet

MFR RecommendedRFQ

MTLW-137-07-F-S-270

Samtec Inc.In Stock: 1114MTLW-137-07-F-S-270 Datasheet

MFR RecommendedRFQ

TSW-137-26-G-S

Samtec Inc.In Stock: 1136TSW-137-26-G-S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the M20-9773742 are qualified based on the following critical parameters that must align with the original design:

Core Compatibility Parameters:

• Number of Positions: 37
• Pitch - Mating: 0.100" (2.54mm)
• Number of Rows: 1
• Contact Type: Male Pin
• Mounting Type: Through Hole
• Termination: Solder
• Fastening Type: Push-Pull
• Shrouding: Unshrouded
• Style: Board to Board or Cable

Allowable Variations: Substitute parts may differ in contact length specifications (mating and post), overall contact length, insulation height, contact shape, contact material, insulation material, and operating temperature range, provided the core compatibility parameters remain unchanged. Contact finish specifications and material flammability ratings may also vary while maintaining functional equivalence.

The substitute parts identified below meet these core compatibility requirements and are classified as active products, ensuring continued availability and support.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status, ensuring long-term availability and manufacturing support. Each substitute meets ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity requirements, matching the original M20-9773742 specifications.

800-10-037-10-002000 (Mill-Max Manufacturing Corp.): This part provides direct functional equivalence with identical pitch, position count, and row configuration. The circular contact shape and PCT insulation material represent acceptable variations. Active product status and ROHS3 compliance support production continuity.

TSW-137-26-G-S (Samtec Inc.): This substitute offers extended operating temperature range (-55°C ~ 125°C) compared to the original part (-40°C ~ 105°C), providing enhanced thermal performance. UL94 V-0 flammability rating and ROHS3 compliance are maintained. The part is actively manufactured and available in bulk packaging.

MTLW-137-07-F-S-250, MTLW-137-07-F-S-255, MTLW-137-07-F-S-260, MTLW-137-07-F-S-265, MTLW-137-07-F-S-270 (Samtec Inc., Flex Stack Series): These five variants provide graduated mating contact length options (0.250" to 0.270") while maintaining identical pitch, position count, and core electrical characteristics. All variants feature LCP insulation material, phosphor bronze contacts, and current ratings of 5.2A per contact, exceeding the original 3A specification. Extended operating temperature range (-55°C ~ 125°C) and UL94 V-0 flammability rating are standard across the series. Active product status ensures consistent supply.

Frequently Asked Questions (FAQ)

Q: Can the M20-9773742 be directly replaced with any of these substitute parts?

A: Yes. All identified substitutes maintain the critical compatibility parameters: 37 positions, 0.100" (2.54mm) pitch, single row, male pin contacts, through-hole mounting, solder termination, and push-pull fastening. Functional equivalence is established through these core specifications.

Q: What are the key differences between the substitute options?

A: The primary differences lie in contact material, insulation material, and contact length specifications. The Mill-Max 800-10-037-10-002000 features circular contacts and PCT insulation. The Samtec TSW-137-26-G-S uses phosphor bronze contacts and PBT insulation. The Samtec MTLW series variants use LCP insulation with graduated mating contact lengths ranging from 0.250" to 0.270", allowing selection based on specific board-to-board or cable application requirements.

Q: Are there temperature performance differences?

A: Yes. The original M20-9773742 operates from -40°C to 105°C. The Samtec TSW-137-26-G-S and all MTLW variants extend this range to -55°C to 125°C, providing enhanced performance in extreme temperature environments.

Q: Do all substitutes meet compliance requirements?

A: All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching the original part. The TSW-137-26-G-S and all MTLW variants maintain UL94 V-0 flammability certification. The Mill-Max 800-10-037-10-002000 does not specify a flammability rating in the provided data.

Q: What is the difference between the five MTLW variants?

A: The MTLW-137-07-F-S-250 through MTLW-137-07-F-S-270 variants differ only in mating contact length: 0.250", 0.255", 0.260", 0.265", and 0.270" respectively. All other electrical and mechanical specifications remain identical. Selection depends on the specific mating depth required by the application.

Q: Which substitute offers the highest current rating?

A: The Samtec TSW-137-26-G-S and all MTLW variants support 5.2A per contact, compared to the original 3A per contact specification. This provides increased current capacity for higher-power applications.

Q: Is packaging a consideration for these substitutes?

A: Packaging specifications vary. The Mill-Max 800-10-037-10-002000 is supplied in tube packaging. The Samtec TSW-137-26-G-S is supplied in bulk packaging. The MTLW series variants do not specify packaging in the provided data. Confirm packaging requirements with your procurement process.