M20-9964045 Equivalent & Substitute Parts

Part Overview

The M20-9964045 is a rectangular connector header manufactured by Harwin Inc., designed for through-hole, right-angle board-to-board or cable applications. This 40-position connector operates at 0.100" (2.54mm) pitch with male pin contacts and solder termination. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	M20-9964045
Manufacturer	Harwin Inc.
Category	Rectangular Connectors
Series	M20
Number of Positions	40
Pitch - Mating	0.100" (2.54mm)
Connector Type	Header, Cuttable
Contact Type	Male Pin
Mounting Type	Through Hole, Right Angle
Termination	Solder
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the M20-9964045 is determined by the following critical parameters:

Primary Matching Criteria:

Pitch - Mating: 0.100" (2.54mm)
Connector Type: Header with male pin contacts
Mounting Type: Through Hole, Right Angle
Termination: Solder
Number of Positions: 40 (for direct replacement) or 36 (for reduced-position applications)
Current Rating: 3A per Contact minimum
Operating Temperature Range: -40°C ~ 105°C minimum

Substitutes are grouped as follows:

Group 1 - Direct Position Match (40-Position):

2340-5111TG (3M, 2300 Series)
2340-5211TG (3M, 2300 Series)

Group 2 - Reduced Position Match (36-Position):

M20-9963645 (Harwin Inc., M20 Series)

All substitute parts maintain identical pitch, connector type, mounting configuration, and termination method. Variations exist in contact length specifications and compliance certifications.

Parameter Comparison

Parameter	M20-9964045	M20-9963645	2340-5111TG	2340-5211TG
Manufacturer	Harwin Inc.	Harwin Inc.	3M	3M
Number of Positions	40	36	40	40
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Connector Type	Header, Cuttable	Header, Cuttable	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.230" (5.84mm)	0.318" (8.08mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)	0.120" (3.05mm)	0.120" (3.05mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Material	Brass	Brass	Copper Alloy	Copper Alloy
Contact Finish - Mating	Gold	Gold	Gold	Gold
Current Rating	3A per Contact	3A per Contact	3A	3A
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

For Direct 40-Position Replacement with RoHS3 Compliance: M20-9963645 is not applicable due to 36-position configuration. Among 40-position alternatives, both 2340-5111TG and 2340-5211TG provide functional equivalence but do not maintain RoHS3 compliance. Selection between these two 3M parts depends on mating contact length requirements: 2340-5111TG provides 0.230" (5.84mm) mating contact length, while 2340-5211TG provides 0.318" (8.08mm).

For RoHS3 Compliance Maintenance: M20-9963645 maintains ROHS3 compliance and Harwin manufacturing continuity but requires design accommodation for 36-position configuration. This part is suitable only when position count reduction is acceptable.

For Extended Temperature Range: Both 3M alternatives (2340-5111TG and 2340-5211TG) support -55°C ~ 105°C operating range, exceeding the original -40°C ~ 105°C specification.

Compliance Considerations: The original M20-9964045 is ROHS3 compliant. Substitution with 2340-5111TG or 2340-5211TG introduces RoHS non-compliance and REACH-affected status. M20-9963645 preserves compliance posture but at reduced position count.

Frequently Asked Questions (FAQ)

Q: Can 2340-5111TG and 2340-5211TG be used interchangeably with M20-9964045?

A: Both parts are functionally equivalent as 40-position, 0.100" pitch, right-angle solder-terminated headers with 3A current rating and UL94 V-0 flammability rating. The primary difference is mating contact length: 2340-5111TG at 0.230" (5.84mm) versus 2340-5211TG at 0.318" (8.08mm). Selection depends on mating depth requirements in your application. Both are electrically and mechanically compatible with M20-9964045 footprints.

Q: Why is M20-9963645 listed as a substitute if it has only 36 positions?

A: M20-9963645 is listed as a manufacturer-recommended substitute for applications where 36 positions are sufficient. It maintains identical pitch, connector type, mounting configuration, and termination method. This part preserves Harwin manufacturing and ROHS3 compliance. Use this substitute only if your design can accommodate reduced position count.

Q: What are the compliance implications of switching from M20-9964045 to 3M alternatives?

A: M20-9964045 is ROHS3 compliant and REACH unaffected. Both 2340-5111TG and 2340-5211TG are RoHS non-compliant and REACH affected. If your application or market requires RoHS3 compliance, use M20-9963645 instead, accepting the 36-position limitation.

Q: Are there temperature rating differences between the original and substitutes?

A: M20-9964045 operates at -40°C ~ 105°C. Both 3M alternatives (2340-5111TG and 2340-5211TG) support -55°C ~ 105°C, providing extended low-temperature capability. M20-9963645 matches the original -40°C ~ 105°C range.

Q: What is the difference between the two 3M parts in terms of contact length?

A: 2340-5111TG provides 0.230" (5.84mm) mating contact length, while 2340-5211TG provides 0.318" (8.08mm) mating contact length. Both maintain 0.120" (3.05mm) post length. The longer mating contact in 2340-5211TG accommodates deeper mating depths. Verify your PCB and mating connector specifications to determine which contact length is appropriate.

Q: Can these connectors be cut to reduce position count?

A: M20-9964045 and M20-9963645 are specified as cuttable headers. The 3M parts (2340-5111TG and 2340-5211TG) are not listed with cuttable designation. If position reduction through cutting is required, use Harwin parts only.

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