M20-9713745 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The M20-9713745 is a right-angle rectangular connector header manufactured by Harwin Inc., designed for through-hole mounting with 37 positions at 0.100" (2.54mm) pitch. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. The connector features male pins with gold-plated brass contacts, solder termination, and push-pull fastening, suitable for board-to-board or cable applications in industrial and commercial electronics.

Key Parameters

Parameter	Value
Connector Type	Header, Right Angle
Number of Positions	37
Pitch - Mating	0.100" (2.54mm)
Contact Type	Male Pin
Mounting Type	Through Hole, Right Angle
Termination	Solder
Contact Material	Brass
Contact Finish - Mating	Gold
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Insulation Material	Polyamide (PA6T), Nylon 6T
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the M20-9713745 is determined by strict equivalence across the following critical parameters:

Connector geometry: 37-position, single-row header with 0.100" (2.54mm) pitch spacing
Mounting configuration: Through-hole, right-angle orientation
Electrical characteristics: 3A per contact current rating with gold-plated mating contacts
Termination method: Solder attachment to PCB
Contact type: Male pins with brass material and gold finish
Compliance: ROHS3 compliance and UL94 V-0 flammability rating

The substitute part 890-70-037-20-002101 (Preci-Dip) meets all these critical parameters. Both parts share identical pitch, position count, mounting type, contact configuration, and termination method. Differences in operating temperature range, insulation material composition, and product status do not affect functional interchangeability within the specified electrical and mechanical constraints.

Parameter Comparison

Parameter	M20-9713745 (Harwin)	890-70-037-20-002101 (Preci-Dip)
Connector Type	Header, Cuttable	Header
Number of Positions	37	37
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Contact Type	Male Pin	Male Pin
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder
Contact Length - Mating	0.276" (7.00mm)	0.276" (7.00mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Contact Material	Brass	Brass
Current Rating	3A per Contact	3A
Operating Temperature	-40°C ~ 105°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Color	Black	Black
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

The 890-70-037-20-002101 (Preci-Dip) is the qualified substitute for the obsolete M20-9713745 (Harwin). Both parts maintain identical electrical and mechanical specifications across all critical parameters: 37-position configuration, 0.100" pitch, through-hole right-angle mounting, solder termination, and 3A per contact current rating.

The substitute part offers extended operating temperature range (-55°C to 125°C versus -40°C to 105°C) and active product status, ensuring long-term availability and supply chain continuity. Both parts carry ROHS3 compliance and UL94 V-0 flammability certification, meeting equivalent regulatory requirements. The Preci-Dip part is available in bulk packaging with 947 units in stock, supporting production requirements.

Frequently Asked Questions (FAQ)

Q: Are the M20-9713745 and 890-70-037-20-002101 mechanically interchangeable?

A: Yes. Both connectors share identical pitch (0.100"), position count (37), mounting type (through-hole right-angle), contact geometry (square male pins), and insulation height (0.100"). PCB footprints and mating interface dimensions are equivalent.

Q: What are the key electrical differences between these parts?

A: Both parts carry identical current rating (3A per contact) and contact material (brass with gold plating). The Preci-Dip substitute provides extended operating temperature range (-55°C to 125°C) compared to the Harwin original (-40°C to 105°C). The substitute also specifies 150VDC voltage rating, which was not provided for the original part.

Q: Does the insulation material difference affect compatibility?

A: No. The M20-9713745 uses Polyamide (PA6T) Nylon 6T, while the 890-70-037-20-002101 uses Polyamide (PA) Nylon with glass filler. Both materials meet UL94 V-0 flammability requirements and are suitable for the same operating environment. The glass-filled variant in the substitute provides equivalent or superior mechanical properties.

Q: Why is the Harwin part marked obsolete?

A: Product obsolescence is a manufacturer lifecycle decision. The Preci-Dip equivalent maintains active status, ensuring continued availability and support for designs requiring this connector specification.

Q: Can I use the Preci-Dip part as a direct replacement in existing designs?

A: Yes. The 890-70-037-20-002101 meets all electrical, mechanical, and compliance requirements of the M20-9713745. No design modifications are required for direct substitution in PCB layouts or mating connector specifications.

Q: What packaging options are available?

A: The M20-9713745 original part is listed with unspecified packaging. The Preci-Dip substitute (890-70-037-20-002101) is supplied in bulk packaging with 947 units currently in stock.

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