M20-7831442 Equivalent & Substitute Parts

Part Overview

The Harwin M20-7831442 is a 28-position receptacle connector with 0.100" (2.54mm) pitch, designed for through-hole board-to-board or cable applications. This connector features gold-plated mating contacts, tin-plated posts, and operates across -40°C to 105°C. The M20 series is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	28
Pitch - Mating	0.100" (2.54mm)
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Operating Temperature	-40°C ~ 105°C
Current Rating	3A
Voltage Rating	1000V
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the M20-7831442 is determined by the following critical parameters:

Connector Type & Contact Configuration: Receptacle with female socket contacts
Position Count & Pitch: 28 positions at 0.100" (2.54mm) mating pitch with 2 rows at 0.100" row spacing
Mounting & Termination: Through-hole solder termination with push-pull fastening
Mating Contact Finish: Gold plating on mating surfaces
Electrical Ratings: Minimum 1000V voltage rating and 3A current capacity
Environmental Compliance: UL94 V-0 flammability rating and ROHS3 compliance

Substitute parts are grouped into two categories:

Category A - Direct Receptacle Substitutes (Gold Mating Finish)

TE Connectivity 1-534206-4 and 6-534206-4 (AMPMODU Mod II series)
Amphenol ICC 66953-014LF (Dubox/BergCon PV series)
Amphenol ICC 87606-314LF (Dubox series)
Amphenol ICC 89891-314LF (Dubox series, bottom/top entry variant)

Category B - Tin Mating Finish Receptacles

TE Connectivity 6-146762-7 (AMPMODU Mod IV series)
Amphenol ICC 87606-414LF (Dubox series)

Category C - Header Connector Alternatives (Complementary Mating Type)

Sullins NPPC142LFBN-RC (gold mating finish)
Sullins PPPC142LFBN-RC (gold mating finish)
Sullins PPTC142LFBN-RC (tin mating finish)

Parameter Comparison

Part Number	Manufacturer	Connector Type	Positions	Pitch	Rows	Mating Finish	Operating Temp	Current Rating	Voltage Rating	UL94 Rating	RoHS Status	Product Status
M20-7831442	Harwin Inc.	Receptacle	28	0.100"	2	Gold	-40°C ~ 105°C	3A	1000V	V-0	ROHS3	Obsolete
1-534206-4	TE Connectivity	Receptacle	28	0.100"	2	Gold	-65°C ~ 125°C	2A	—	—	Not applicable	Active
6-146762-7	TE Connectivity	Receptacle	28	0.100"	2	Tin	-65°C ~ 125°C	2A	—	V-0	RoHS Compliant	Active
6-534206-4	TE Connectivity	Receptacle	28	0.100"	2	Gold	-65°C ~ 125°C	2A	—	V-0	RoHS Compliant	Active
66953-014LF	Amphenol ICC	Receptacle	28	0.100"	2	Gold	-65°C ~ 125°C	—	1250V	V-0	RoHS Compliant	Active
87606-314LF	Amphenol ICC	Receptacle	28	0.100"	2	Gold	—	—	—	V-0	RoHS Compliant	Active
87606-414LF	Amphenol ICC	Receptacle	28	0.100"	2	Tin	—	—	—	V-0	RoHS Compliant	Active
89891-314LF	Amphenol ICC	Receptacle (Bottom/Top Entry)	28	0.100"	2	Gold	—	—	—	V-0	RoHS Compliant	Active
NPPC142LFBN-RC	Sullins	Header	28	0.100"	2	Gold	-40°C ~ 105°C	3A	250V	V-0	ROHS3	Active
PPPC142LFBN-RC	Sullins	Header	28	0.100"	2	Gold	-40°C ~ 105°C	3A	250V	V-0	ROHS3	Active
PPTC142LFBN-RC	Sullins	Header	28	0.100"	2	Tin	-40°C ~ 105°C	3A	250V	V-0	ROHS3	Active

Engineering Selection Recommendations

For Direct Receptacle Replacement (Same Connector Type)

Select from TE Connectivity or Amphenol ICC receptacle options when the mating connector is a header or plug type. TE Connectivity 6-534206-4 and Amphenol ICC 66953-014LF are preferred for active production due to current product status and RoHS compliance. The TE Connectivity option provides extended operating temperature range (-65°C to 125°C) compared to the original M20-7831442 (-40°C to 105°C).

For Gold Mating Finish Applications

TE Connectivity 1-534206-4, 6-534206-4, Amphenol ICC 66953-014LF, 87606-314LF, and 89891-314LF all provide gold mating contact finish. The 89891-314LF variant offers bottom or top entry configuration for applications requiring alternative insertion geometry.

For Tin Mating Finish Applications

TE Connectivity 6-146762-7 and Amphenol ICC 87606-414LF provide tin mating finish. These are suitable when gold plating is not required and cost optimization is a consideration.

For Header Connector Substitution (Complementary Type)

Sullins NPPC142LFBN-RC, PPPC142LFBN-RC, and PPTC142LFBN-RC are header connectors designed to mate with receptacle connectors. These are applicable when the system architecture requires a header on one board and receptacle on the mating board. All three maintain the same operating temperature range and current rating as the original M20-7831442, with ROHS3 compliance.

Voltage Rating Considerations

The original M20-7831442 specifies 1000V. Amphenol ICC 66953-014LF exceeds this at 1250V. TE Connectivity parts do not specify voltage rating in available data. Sullins header options specify 250V, suitable for lower-voltage applications only.

Current Rating Considerations

The original M20-7831442 specifies 3A. TE Connectivity receptacles specify 2A. Amphenol ICC receptacles do not specify current rating. Sullins header options maintain 3A rating.

Frequently Asked Questions (FAQ)

Q: Can I substitute a header connector for a receptacle connector?

A: Header and receptacle connectors are complementary types designed to mate with each other. Direct substitution is not possible if the mating connector type is fixed. However, if system redesign allows, Sullins header options (NPPC142LFBN-RC, PPPC142LFBN-RC, PPTC142LFBN-RC) provide equivalent 28-position, 0.100" pitch functionality with matching electrical ratings and compliance certifications.

Q: What is the difference between gold and tin mating finishes?

A: Gold-plated mating contacts provide superior corrosion resistance and lower contact resistance, suitable for high-reliability and long-term storage applications. Tin-plated mating contacts are cost-effective for general-purpose applications with shorter shelf life requirements. The M20-7831442 specifies gold finish; tin-finish substitutes (6-146762-7, 87606-414LF) are suitable only if application requirements permit.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are RoHS compliant. The original M20-7831442 is ROHS3 compliant. TE Connectivity 1-534206-4 is marked "Not applicable" for RoHS status. All Amphenol ICC and Sullins parts are RoHS Compliant or ROHS3 Compliant.

Q: What is the operating temperature range difference?

A: The original M20-7831442 operates -40°C to 105°C. TE Connectivity receptacles extend this to -65°C to 125°C, providing wider environmental tolerance. Amphenol ICC receptacles specify -65°C to 125°C. Sullins header connectors match the original at -40°C to 105°C.

Q: Which substitute offers the highest voltage rating?

A: Amphenol ICC 66953-014LF specifies 1250V, exceeding the original M20-7831442 at 1000V. This part is suitable for high-voltage applications requiring margin above the original specification.

Q: Can I use a substitute with lower current rating?

A: The original M20-7831442 specifies 3A. TE Connectivity receptacles specify 2A. Substitution with lower current rating is acceptable only if the application current requirement does not exceed the substitute part's rating. Verify actual circuit current draw before selection.

Q: What packaging options are available?

A: TE Connectivity parts are supplied in Tube packaging. Amphenol ICC parts are supplied in Tube packaging. Sullins header connectors are supplied in Tray packaging. Packaging selection may affect handling, storage, and assembly processes.

Q: Are insulation material differences significant?

A: The original M20-7831442 uses Polyamide (PA6T), Nylon 6T. TE Connectivity parts use Polyester, Glass Filled. Amphenol ICC parts use Polyester, Glass Filled or Thermoplastic, Glass Filled. Sullins parts use Polyamide (PA6T), Nylon 6T or Polyester. All materials meet UL94 V-0 flammability requirements. Material differences do not affect electrical performance for standard applications.

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