M20-9733845 Equivalent & Substitute Parts

Part Overview

The M20-9733845 is a rectangular connector header manufactured by Harwin Inc., featuring 38 vertical positions with 0.100" (2.54mm) pitch spacing. This through-hole component is designed for board-to-board or cable connections with solder termination and push-pull fastening. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

M20-9733845

Harwin Inc.In Stock: 1191M20-9733845 Datasheet

Current PartRFQ

890-70-038-10-002101

Preci-DipIn Stock: 1202890-70-038-10-002101 Datasheet

MFR RecommendedRFQ

MTLW-138-07-F-S-275

Samtec Inc.In Stock: 660MTLW-138-07-F-S-275 Datasheet

MFR RecommendedRFQ

MTLW-138-07-F-S-280

Samtec Inc.In Stock: 1117MTLW-138-07-F-S-280 Datasheet

MFR RecommendedRFQ

MTLW-138-23-F-S-285

Samtec Inc.In Stock: 953MTLW-138-23-F-S-285 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the M20-9733845 are qualified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Number of Positions: 38
• 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
• Material Flammability Rating: UL94 V-0
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

• Operating Temperature range (minimum -40°C, maximum 105°C or higher)
• Current Rating (minimum 3A per Contact)
• Contact finish (Gold on mating surface)
• Insulation material compatibility

All substitute parts listed maintain these core electrical and mechanical parameters, ensuring direct functional compatibility with applications designed for the M20-9733845.

Parameter Comparison

Engineering Selection Recommendations

890-70-038-10-002101 (Preci-Dip): This substitute maintains identical position count, pitch, and contact configuration as the M20-9733845. The part is active in production with ROHS3 compliance and UL94 V-0 flammability rating. Operating temperature range extends to -55°C ~ 125°C, exceeding the original specification. Current rating matches at 3A per contact. Glass-filled nylon insulation provides enhanced mechanical properties compared to the original polyamide formulation.

MTLW-138-07-F-S-275, MTLW-138-07-F-S-280, MTLW-138-23-F-S-285 (Samtec Flex Stack Series): These three variants from Samtec's MTLW series provide active production alternatives with extended operating temperature range (-55°C ~ 125°C) and higher current rating (5.2A per contact). All three maintain the required 38-position, 2.54mm pitch configuration with gold-plated mating contacts. Phosphor bronze contact material and liquid crystal polymer insulation offer superior mechanical and thermal performance. Variants differ in contact length specifications to accommodate different application requirements.

All substitute parts maintain ROHS3 compliance, UL94 V-0 flammability rating, and MSL 1 moisture sensitivity level, ensuring regulatory and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can the 890-70-038-10-002101 directly replace the M20-9733845 in existing designs?

A: Yes. Both parts share identical position count (38), pitch spacing (0.100" / 2.54mm), contact type (male pin), mounting method (through-hole solder), and fastening mechanism (push-pull). The Preci-Dip substitute maintains the same electrical and mechanical interface specifications required for direct substitution.

Q: What are the key differences between the Preci-Dip and Samtec substitute options?

A: The Preci-Dip 890-70-038-10-002101 matches the original current rating of 3A per contact with brass contact material. The three Samtec MTLW variants offer higher current capacity (5.2A per contact) with phosphor bronze contacts and liquid crystal polymer insulation. Samtec variants differ in contact length specifications: MTLW-138-07-F-S-275 (0.095" post length), MTLW-138-07-F-S-280 (0.090" post length), and MTLW-138-23-F-S-285 (0.100" post length). Selection depends on specific board thickness and mating depth requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts—890-70-038-10-002101, MTLW-138-07-F-S-275, MTLW-138-07-F-S-280, and MTLW-138-23-F-S-285—are ROHS3 compliant and carry UL94 V-0 flammability ratings, matching the original M20-9733845 specifications.

Q: What is the operating temperature difference between the original and substitute parts?

A: The M20-9733845 operates from -40°C to 105°C. All substitute parts extend this range to -55°C to 125°C, providing broader thermal operating capability without compromising the original specification envelope.

Q: Which substitute part should be selected for high-current applications?

A: The three Samtec MTLW variants (MTLW-138-07-F-S-275, MTLW-138-07-F-S-280, MTLW-138-23-F-S-285) support 5.2A per contact, compared to 3A for both the original and Preci-Dip substitute. These are appropriate for applications requiring higher current capacity while maintaining the 38-position, 2.54mm pitch interface.

Q: Do the substitute parts have different packaging considerations?

A: The Preci-Dip 890-70-038-10-002101 is supplied in bulk packaging. Samtec MTLW variants do not specify packaging format in the provided data. Confirm packaging requirements with component distributors based on production volume and assembly process specifications.

Q: Are there any mechanical dimension differences that affect PCB layout?

A: Contact length and overall connector height vary among substitutes. The M20-9733845 has 0.122" post length and 0.100" insulation height. Preci-Dip maintains similar dimensions (0.118" post length, 0.100" insulation height). Samtec variants feature 0.060" insulation height with varying post lengths (0.095", 0.090", or 0.100"), which may affect board-to-board spacing and mating depth. Verify mechanical compatibility with existing PCB designs before implementation.