M20-9953845 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The M20-9953845 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle board-to-board applications. This 76-position connector operates at 0.100" (2.54mm) pitch with a 2-row configuration and supports 3A per contact at operating temperatures from -40°C to 105°C. The part is classified as obsolete, making identification of active equivalent components essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9953845
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	76
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Contact Length - Mating	0.240" (6.10mm)
Contact Length - Post	0.118" (3.00mm)
Insulation Height	0.200" (5.08mm)
Contact Material	Brass
Contact Finish - Mating	Gold
Insulation Material	Polyamide (PA6T), Nylon 6T
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the M20-9953845 is determined by strict equivalence across the following critical parameters:

Connector Configuration: 76 positions, 2 rows, 0.100" (2.54mm) pitch mating and row spacing
Mounting and Orientation: Through-hole, right-angle mounting for board-to-board connection
Contact Specifications: Male pin contacts with brass material and gold mating finish
Electrical Performance: 3A per contact current rating
Mechanical Compatibility: Contact length (mating and post), insulation height, and contact shape (square)
Environmental and Compliance: UL94 V-0 flammability rating, ROHS3 compliance, and MSL 1 moisture sensitivity

The substitute part 892-70-076-20-001101 from Preci-Dip meets all these critical parameters while offering active product status and extended operating temperature range.

Parameter Comparison

Parameter	M20-9953845 (Harwin)	892-70-076-20-001101 (Preci-Dip)	Compatibility
Number of Positions	76	76	Equivalent
Number of Rows	2	2	Equivalent
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	Equivalent
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	Equivalent
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Equivalent
Contact Type	Male Pin	Male Pin	Equivalent
Contact Length - Mating	0.240" (6.10mm)	0.236" (6.00mm)	Within tolerance
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)	Equivalent
Insulation Height	0.200" (5.08mm)	0.200" (5.08mm)	Equivalent
Contact Shape	Square	Square	Equivalent
Contact Material	Brass	Brass	Equivalent
Contact Finish - Mating	Gold	Gold	Equivalent
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA), Nylon, Glass Filled	Compatible
Current Rating	3A per Contact	3A	Equivalent
Operating Temperature	-40°C ~ 105°C	-55°C ~ 125°C	Substitute exceeds range
Material Flammability Rating	UL94 V-0	UL94 V-0	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Product Status	Obsolete	Active	Substitute is active

Engineering Selection Recommendations

The 892-70-076-20-001101 from Preci-Dip is the qualified substitute for the obsolete M20-9953845. Selection is based on the following engineering criteria:

Electrical and Mechanical Equivalence: Both parts maintain identical 76-position, 2-row configurations with 0.100" (2.54mm) pitch and 3A per contact current rating. Contact geometry, material composition, and mating specifications are equivalent or within acceptable tolerance.

Compliance and Certification: Both parts carry ROHS3 compliance and UL94 V-0 flammability rating, meeting regulatory requirements for equivalent applications. MSL 1 moisture sensitivity classification is identical.

Product Status: The substitute part maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Operating Temperature: The substitute part extends the operating temperature range to -55°C ~ 125°C, providing enhanced thermal performance beyond the original specification of -40°C ~ 105°C.

Frequently Asked Questions (FAQ)

Q: What makes 892-70-076-20-001101 a direct substitute for M20-9953845?

A: Both connectors share identical critical parameters: 76 positions, 2 rows, 0.100" (2.54mm) pitch, through-hole right-angle mounting, male pin contacts, brass material with gold mating finish, and 3A per contact current rating. Contact geometry and insulation specifications are equivalent or within tolerance.

Q: Are there mechanical compatibility concerns between these parts?

A: No. The contact length mating specification differs by 0.004" (0.10mm), which is within standard manufacturing tolerance for connector applications. Post length, insulation height, and contact shape are identical, ensuring mechanical interchangeability in board-to-board applications.

Q: Does the substitute part meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant and carry UL94 V-0 flammability rating. Moisture sensitivity level (MSL 1) is identical, indicating equivalent handling and storage requirements.

Q: Why should I select the substitute part over the original?

A: The original M20-9953845 is classified as obsolete, creating procurement and long-term supply risks. The substitute 892-70-076-20-001101 is active, ensuring availability and supply chain stability. Additionally, the substitute offers extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 105°C).

Q: Are there packaging differences between these parts?

A: The original part packaging is not specified. The substitute is supplied in bulk packaging. Confirm packaging requirements with your procurement department for order specifications.

Q: What is the difference in insulation material between the two parts?

A: The original uses Polyamide (PA6T), Nylon 6T, while the substitute uses Polyamide (PA), Nylon with glass filler. Both materials meet UL94 V-0 flammability requirements and are suitable for equivalent electrical and thermal performance in this connector application.

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