M20-9960745 Equivalent & Substitute Parts

Part Overview

The M20-9960745 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle board-to-board or cable applications. This 7-position connector operates at 3A per contact with a 0.100" (2.54mm) pitch and is rated for -40°C to 105°C. The part is currently active in production with 1671 units in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value
Connector Type	Header, Through Hole, Right Angle
Number of Positions	7
Pitch - Mating	0.100" (2.54mm)
Contact Type	Male Pin
Mounting Type	Through Hole, Right Angle
Current Rating	3A per Contact
Operating Temperature	-40°C to 105°C
Contact Finish - Mating	Gold
Insulation Material	Polyamide (PA6T), Nylon 6T
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The M20-9960745 can be substituted with the Würth Elektronik 61300711021 based on the following critical parameters that determine functional equivalence:

Connector Configuration: Both parts are 7-position, single-row headers with 0.100" (2.54mm) pitch
Mounting and Orientation: Both feature through-hole, right-angle mounting for identical PCB integration
Contact System: Both use male pin contacts with gold-plated mating surfaces and square contact geometry
Electrical Performance: Both rated at 3A per contact with identical insulation material (Polyamide PA6T, Nylon 6T)
Mechanical Compatibility: Both have identical insulation height (0.100" / 2.54mm) and contact post length (0.118" / 3.00mm)
Regulatory Compliance: Both meet UL94 V-0 flammability and ROHS3 compliance requirements

The substitute part maintains functional interchangeability for board-to-board and cable connection applications within the specified electrical and thermal operating ranges.

Parameter Comparison

Parameter	M20-9960745 (Harwin)	61300711021 (Würth Elektronik)
Manufacturer	Harwin Inc.	Würth Elektronik
Series	M20	WR-PHD
Number of Positions	7	7
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Connector Type	Header, Cuttable	Header
Contact Type	Male Pin	Male Pin
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Contact Length - Mating	0.240" (6.10mm)	0.236" (6.00mm)
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	Copper Alloy
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T
Operating Temperature	-40°C to 105°C	-40°C to 125°C
Current Rating	3A per Contact	3A
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Color	Black	Black
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

Both the M20-9960745 and 61300711021 are active production parts with full regulatory compliance. Selection between these parts should be based on the following factors:

Thermal Operating Range: The Würth Elektronik 61300711021 supports an extended upper operating temperature of 125°C compared to the Harwin M20-9960745 at 105°C. Applications requiring operation above 105°C must use the substitute part.

Contact Material Composition: The M20-9960745 uses brass contacts, while the 61300711021 uses copper alloy contacts. Both materials provide equivalent electrical performance and gold plating ensures consistent mating surface characteristics.

Mating Contact Length: The M20-9960745 provides 0.240" (6.10mm) mating contact length versus 0.236" (6.00mm) for the substitute. This 0.004" difference is within standard connector tolerance ranges and does not affect functional compatibility.

Inventory and Supply: Both parts are in active stock with comparable availability (1671 units for M20-9960745 and 1470 units for 61300711021).

Regulatory Compliance: Both parts meet identical compliance requirements (ROHS3, REACH Unaffected, UL94 V-0, EAR99 classification).

Frequently Asked Questions (FAQ)

Q: Can the 61300711021 directly replace the M20-9960745 in existing designs?

A: Yes. Both connectors share identical pitch (0.100" / 2.54mm), position count (7), mounting type (through-hole right-angle), and electrical ratings (3A per contact). The mechanical and electrical interfaces are compatible for board-to-board and cable applications.

Q: What is the significance of the 0.004" difference in mating contact length?

A: The mating contact length difference (0.240" vs 0.236") falls within standard connector manufacturing tolerances and does not affect mating depth or electrical performance. Both parts interface identically with standard 0.100" pitch receptacles.

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

A: The Würth Elektronik 61300711021 is rated to 125°C, providing a 20°C margin above the Harwin M20-9960745 (105°C). For applications operating above 105°C, the substitute part is required.

Q: Are there differences in contact material that affect performance?

A: The M20-9960745 uses brass contacts while the 61300711021 uses copper alloy contacts. Both materials are gold-plated for mating surfaces, ensuring equivalent electrical conductivity and corrosion resistance. Contact material composition does not affect functional interchangeability.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, UL94 V-0 rated, and classified as EAR99 for export control purposes. Compliance requirements are identical.

Q: What packaging format is available for both parts?

A: Both the M20-9960745 and 61300711021 are supplied in bulk packaging suitable for production assembly and component procurement workflows.

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