M20-7872046 Equivalent & Substitute Parts

Part Overview

The M20-7872046 is a 40-position rectangular connector receptacle manufactured by Harwin Inc., designed for surface mount applications with 0.100" (2.54mm) pitch and tin contact finish. This connector is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. The part operates across industrial, telecommunications, and general-purpose applications with a 3A current rating and 1000V voltage rating.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Bottom or Top Entry
Number of Positions	40
Pitch - Mating	0.100" (2.54mm)
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Surface Mount
Contact Finish - Mating	Tin
Current Rating	3A
Voltage Rating	1000V
Operating Temperature	-40°C ~ 105°C
Insulation Material	Polyamide (PA6T), Nylon 6T
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the M20-7872046 is determined by strict alignment of the following critical parameters:

Connector Configuration: 40 positions, 2 rows, 0.100" (2.54mm) pitch and row spacing
Mounting Technology: Surface mount termination with solder connection
Fastening Mechanism: Push-pull fastening type
Contact Geometry: Square contact shape with phosphor bronze material
Electrical Performance: Current and voltage ratings must meet or exceed the original specification
Environmental Compliance: ROHS3 compliance and MSL 1 rating required

Substitute parts are grouped into two categories based on connector type and contact finish:

Category A - Header Connectors with Gold Finish (NPPC202KFMP-RC, NPPC202KFMS-RC, SFM710-NPPC-D20-SP-BK): These parts transition from receptacle to header configuration with gold plating. They maintain the 40-position, 2-row, 0.100" pitch architecture and surface mount design. Operating temperature extends to 125°C, and voltage rating reduces to 250V.

Category B - Receptacle Connectors with Gold Finish (SSM-120-F-DV-BE-A-K-TR, SSM-120-F-DV-BE-A-TR, SSM-120-F-DV-BE-K, SSM-120-F-DV-BE-K-TR, SSM-120-F-DV-BE-LC): These parts maintain receptacle configuration with bottom entry design and gold contact finish. They feature enhanced current rating (5.2A per contact), extended operating temperature (-55°C ~ 125°C), and higher voltage rating (405VAC, 572VDC). Insulation material transitions to Liquid Crystal Polymer (LCP).

Category C - Header Connectors with Tin Finish (NPTC202KFMP-RC, NPTC202KFMS-RC): These parts provide direct functional equivalence with tin contact finish matching the original specification, transitioning from receptacle to header configuration. Operating temperature extends to 125°C, and voltage rating reduces to 250V.

Parameter Comparison

Parameter	M20-7872046	NPPC202KFMP-RC	NPPC202KFMS-RC	NPTC202KFMP-RC	NPTC202KFMS-RC	SFM710-NPPC-D20-SP-BK	SSM-120-F-DV-BE-A-K-TR	SSM-120-F-DV-BE-LC
Manufacturer	Harwin Inc.	Sullins Connector Solutions	Sullins Connector Solutions	Sullins Connector Solutions	Sullins Connector Solutions	Sullins Connector Solutions	Samtec Inc.	Samtec Inc.
Connector Type	Receptacle, Bottom or Top Entry	Header	Header	Header	Header	Header, Top or Bottom Entry	Receptacle, Bottom Entry	Receptacle, Bottom Entry
Number of Positions	40	40	40	40	40	40	40	40
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)
Number of Rows	2	2	2	2	2	2	2	2
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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Termination	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
Contact Finish - Mating	Tin	Gold	Gold	Tin	Tin	Gold	Gold	Gold
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black
Current Rating	3A	3A	3A	3A	3A	3A	5.2A per Contact	5.2A per Contact
Voltage Rating	1000V	250V	250V	250V	250V	Not Specified	405VAC, 572VDC	405VAC, 572VDC
Operating Temperature	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C
Insulation Material	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Polyamide (PA), Nylon	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and storage requirements.

For applications requiring tin contact finish matching the original specification, NPTC202KFMP-RC and NPTC202KFMS-RC provide direct functional equivalence. Both parts are active products with extended operating temperature range (-40°C ~ 125°C) compared to the original M20-7872046. Voltage rating reduces to 250V, which is acceptable for most general-purpose and industrial applications operating below 250V. NPTC202KFMS-RC offers significantly higher inventory availability (52,647 units) compared to NPTC202KFMP-RC (984 units).

For applications where connector type transition from receptacle to header is acceptable, the Sullins NPPC202 and NPTC202 series provide active product alternatives with gold or tin finish options respectively. These parts maintain the 40-position, 2-row, 0.100" pitch configuration and surface mount design. The NPPC202KFMS-RC variant offers the highest inventory level (3,519 units) among the Sullins header options.

For applications requiring enhanced electrical performance and extended temperature range, the Samtec SSM-120 series receptacle connectors provide superior specifications. These parts maintain receptacle configuration with bottom entry design, feature 5.2A per contact current rating, and operate across -55°C ~ 125°C. Voltage rating increases to 405VAC/572VDC. Insulation material transitions to Liquid Crystal Polymer (LCP), providing improved thermal and mechanical properties. SSM-120-F-DV-BE-LC offers the highest inventory availability (858 units) within the Samtec receptacle options.

For applications requiring top or bottom entry flexibility, SFM710-NPPC-D20-SP-BK provides a header configuration with gold contact finish and operating temperature matching the original specification (-40°C ~ 105°C). This part includes board guide features and maintains the 40-position, 2-row, 0.100" pitch architecture.

Frequently Asked Questions (FAQ)

Q: Can NPTC202KFMS-RC directly replace M20-7872046 in existing designs?

A: NPTC202KFMS-RC maintains the same 40-position, 2-row, 0.100" pitch configuration, surface mount design, and tin contact finish as the M20-7872046. The primary difference is connector type transition from receptacle to header. Voltage rating reduces from 1000V to 250V. If your application operates below 250V and accepts header configuration, this part provides functional equivalence. Operating temperature extends to 125°C, which is beneficial for thermal margin.

Q: What is the difference between gold and tin contact finishes in these substitutes?

A: Tin contact finish (NPTC202 series) matches the original M20-7872046 specification and provides cost-effective performance for general-purpose applications. Gold contact finish (NPPC202 and SSM-120 series) offers superior corrosion resistance and contact reliability, particularly in high-humidity or corrosive environments. Gold finish is recommended for telecommunications and industrial applications requiring extended service life.

Q: Why do some substitutes have lower voltage ratings than the original part?

A: The Sullins header alternatives (NPPC202 and NPTC202 series) are rated for 250V, compared to the original 1000V rating. This reflects the different connector architecture and insulation design. For applications operating below 250V, these parts are fully suitable. For applications requiring 1000V rating, the Samtec SSM-120 series receptacle connectors rated for 405VAC/572VDC provide higher voltage capability while maintaining receptacle configuration.

Q: What packaging options are available for high-volume production?

A: NPTC202KFMS-RC is available in Tube packaging with 52,647 units in stock, providing the highest availability for production quantities. SSM-120-F-DV-BE-K-TR is available in Tape & Reel (TR) packaging with 721 units in stock, suitable for automated assembly processes. Tape & Reel packaging is standard for high-volume surface mount production.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. This ensures compatibility with modern manufacturing processes and regulatory requirements across industrial, telecommunications, and consumer applications.

Q: What is the difference between SSM-120 variants with different suffixes (A-K-TR, A-TR, K, K-TR, LC)?

A: SSM-120 variants differ in packaging and feature configuration. The "-TR" suffix indicates Tape & Reel packaging for automated assembly. The "-K" suffix indicates pick-and-place compatibility. The "-LC" suffix indicates board lock feature. The "-A" designation indicates specific contact configuration. All variants maintain the same 40-position, 2-row, 0.100" pitch, and electrical specifications (5.2A per contact, 405VAC/572VDC).

Q: Can receptacle and header connectors be intermated?

A: Receptacle and header connectors are designed for mating with complementary connector types. The M20-7872046 receptacle mates with header connectors. If substituting with a header connector (NPPC202 or NPTC202 series), the mating connector must be a receptacle type. Verify that existing mating connectors in your design are compatible with the substitute connector type before implementation.

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