Harwin M20-9952046 Equivalent & Substitute Parts

Part Overview

The Harwin M20-9952046 is a rectangular connector header, right-angle mounted, 40-position configuration with 2.54mm pitch spacing. This through-hole component features male pins with tin contact finish and is designed for board-to-board or cable applications. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute connectors must maintain electrical and mechanical compatibility while meeting the same performance specifications.

Key Parameters

Parameter	M20-9952046 Specification
Connector Type	Header, Cuttable
Contact Type	Male Pin
Number of Positions	40
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Contact Length - Mating	0.240" (6.10mm)
Contact Length - Post	0.118" (3.00mm)
Insulation Height	0.200" (5.08mm)
Contact Shape	Square
Contact Finish - Mating	Tin
Contact Material	Brass
Current Rating	3A per Contact
Operating Temperature	-40°C ~ 105°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the M20-9952046 is determined by strict alignment with the following critical parameters:

Primary Compatibility Criteria:

40-position, 2-row configuration with 0.100" (2.54mm) pitch spacing
Through-hole, right-angle mounting
Male pin contact type with solder termination
Push-pull fastening mechanism
Board-to-board or cable style application
UL94 V-0 flammability rating
3A per contact current rating
ROHS3 compliance

Secondary Compatibility Parameters:

Contact mating length: 0.230" to 0.268" (5.84mm to 6.80mm) acceptable range
Contact post length: 0.100" to 0.126" (2.54mm to 3.20mm) acceptable range
Insulation height: 0.190" to 0.200" (4.83mm to 5.08mm) acceptable range
Operating temperature range: minimum -40°C or lower, maximum 105°C or higher
Contact finish: Gold or Tin acceptable
Contact material: Brass or Phosphor Bronze acceptable

All listed substitute parts meet these criteria and are functionally equivalent for direct replacement applications.

Parameter Comparison

Parameter	M20-9952046	M20-9952045	68021-140HLF	77317-103-40LF	77317-104-40LF	77317-112-40LF	77317-803-40LF	77317-804-40LF	77317-812-40LF	802-10-040-20-001101	802-80-040-20-001101
Manufacturer	Harwin Inc.	Harwin Inc.	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Preci-Dip	Preci-Dip
Series	M20	M20	BERGSTIK® II	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	BERGSTIK®	802	802
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Number of Positions	40	40	40	40	40	40	40	40	40	40	40
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.268" (6.80mm)	0.230" (5.84mm)	0.230" (5.84mm)	0.268" (6.80mm)	0.195" (4.95mm)	0.195" (4.95mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)	0.120" (3.05mm)	0.100" (2.54mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.100" (2.54mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.126" (3.20mm)	0.126" (3.20mm)
Insulation Height	0.200" (5.08mm)	0.200" (5.08mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.190" (4.83mm)	0.200" (5.08mm)	0.200" (5.08mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Circular	Circular
Contact Finish - Mating	Tin	Gold	Gold or Gold, GXT™	Gold, GXT™	Gold, GXT™	Gold, GXT™	Gold, GXT™	Gold, GXT™	Gold, GXT™	Gold	Tin
Contact Material	Brass	Brass	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Brass	Brass
Current Rating	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A per Contact	3A	3A
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-65°C ~ 125°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-65°C ~ 130°C	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: M20-9952045

The Harwin M20-9952045 is the direct active equivalent to the obsolete M20-9952046. Both parts share identical mechanical and electrical specifications with the exception of contact finish (gold versus tin). The M20-9952045 maintains ROHS3 compliance and is currently in active production status with 832 units in stock. This part is the preferred choice for direct replacement in existing designs.

Secondary Recommendations: Amphenol ICC BERGSTIK® Series (77317-103-40LF, 77317-104-40LF, 77317-112-40LF, 77317-803-40LF, 77317-804-40LF, 77317-812-40LF)

The Amphenol ICC BERGSTIK® series connectors provide functionally equivalent substitution with enhanced operating temperature range (-65°C to 130°C versus -40°C to 105°C). These parts feature phosphor bronze contacts with gold plating and breakaway connector type. Contact length variations exist across the series; 77317-104-40LF and 77317-804-40LF provide the closest match to the original 0.120" (3.05mm) post length specification. All BERGSTIK® variants maintain UL94 V-0 flammability rating and RoHS compliance.

Alternative Recommendation: Amphenol ICC BERGSTIK® II (68021-140HLF)

The 68021-140HLF offers the widest operating temperature range (-65°C to 125°C) and features gold or GXT™ contact finish with phosphor bronze material. This part is suitable for applications requiring enhanced thermal performance while maintaining electrical compatibility.

Tertiary Recommendations: Preci-Dip 802 Series (802-10-040-20-001101, 802-80-040-20-001101)

The Preci-Dip 802 series provides substitution with circular contact geometry and brass material. The 802-10-040-20-001101 features gold contact finish, while 802-80-040-20-001101 provides tin finish. Both maintain 3A current rating and ROHS3 compliance. Contact mating length is shorter (0.195" versus 0.240"), requiring board layout verification for mating depth compatibility.

Frequently Asked Questions (FAQ)

Q: Can M20-9952045 directly replace M20-9952046 in existing designs?

A: Yes. The M20-9952045 is the active production equivalent with identical mechanical and electrical specifications. The only difference is contact finish (gold versus tin), which does not affect functional compatibility. No design changes are required.

Q: What is the primary difference between Harwin M20 series and Amphenol BERGSTIK® series substitutes?

A: The BERGSTIK® series offers extended operating temperature range (-65°C to 130°C versus -40°C to 105°C) and phosphor bronze contacts with gold plating. Mechanical dimensions are similar but contact lengths vary by model. BERGSTIK® parts feature breakaway connector type, providing additional mechanical flexibility.

Q: Are contact length variations between substitute parts critical?

A: Contact length affects mating depth and board-to-connector spacing. The original M20-9952046 specifies 0.240" (6.10mm) mating contact length. Substitutes range from 0.195" to 0.268". Verify board layout accommodates the selected substitute's contact length to ensure proper mating engagement and clearance.

Q: Which substitute offers the best thermal performance?

A: The Amphenol ICC BERGSTIK® series (77317-103-40LF through 77317-812-40LF) and BERGSTIK® II (68021-140HLF) provide the widest operating temperature range at -65°C to 125°C or -65°C to 130°C, compared to the original -40°C to 105°C specification.

Q: Do all substitutes maintain RoHS compliance?

A: Yes. All listed substitutes are RoHS compliant (either ROHS3 or RoHS Compliant status). The Harwin M20-9952045 and Preci-Dip 802 series are ROHS3 compliant. Amphenol ICC BERGSTIK® series parts are RoHS compliant.

Q: What is the difference between square and circular contact shapes in the Preci-Dip 802 series?

A: The original M20-9952046 and most substitutes feature square contact geometry. The Preci-Dip 802 series uses circular contacts. This difference does not affect electrical performance but may impact mechanical fit with existing mating connectors. Verify compatibility with mating connector contact geometry before selection.

Q: Are gold-plated contacts superior to tin-plated contacts?

A: Gold plating provides enhanced corrosion resistance and lower contact resistance over extended service life. Tin plating is suitable for standard applications with adequate environmental protection. Selection depends on application requirements for corrosion resistance and contact reliability.

Q: Can I mix substitute parts from different manufacturers in the same assembly?

A: All listed substitutes are mechanically and electrically compatible for board-level integration. However, maintaining consistency within a single assembly using parts from the same manufacturer and series is recommended for optimal performance and serviceability.

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