M20-7871346 Equivalent & Substitute Parts

Part Overview

The M20-7871346 is a 26-position rectangular connector manufactured by Harwin Inc., designed for surface mount applications with 0.100" (2.54mm) pitch spacing. This receptacle connector features tin contact finish and push-pull fastening, suitable for board-to-board or cable interconnections in general purpose, industrial, and telecommunications applications.

The M20-7871346 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this connector.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Bottom or Top Entry
Number of Positions	26
Pitch - Mating	0.100" (2.54mm)
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Surface Mount
Fastening Type	Push-Pull
Contact Type	Female Socket
Termination	Solder
Current Rating	3A
Voltage Rating	1000V
Operating Temperature	-40°C ~ 105°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The SSM-113-L-DV from Samtec Inc. qualifies as a substitute for the M20-7871346 based on the following critical parameters:

Matching Parameters:

26-position receptacle configuration
0.100" (2.54mm) mating pitch
2-row layout with 0.100" (2.54mm) row spacing
Surface mount solder termination
Push-pull fastening mechanism
Female socket contact type
Square contact geometry
Phosphor bronze contact material
ROHS3 compliance
Moisture sensitivity level 1 (unlimited)

The SSM-113-L-DV maintains functional and mechanical compatibility with the M20-7871346 across all critical interconnection parameters.

Parameter Comparison

Parameter	M20-7871346 (Harwin)	SSM-113-L-DV (Samtec)
Connector Type	Receptacle, Bottom or Top Entry	Receptacle, Pass Through
Number of Positions	26	26
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Surface Mount	Surface Mount
Fastening Type	Push-Pull	Push-Pull
Contact Type	Female Socket	Female Socket
Termination	Solder	Solder
Contact Finish - Mating	Tin	Gold (10.0µin / 0.25µm)
Contact Finish - Post	Tin	Tin
Insulation Material	Polyamide (PA6T), Nylon 6T	Liquid Crystal Polymer (LCP)
Insulation Height	0.295" (7.50mm)	0.290" (7.37mm)
Current Rating	3A	5.2A per Contact
Voltage Rating	1000V	405VAC, 572VDC
Operating Temperature	-40°C ~ 105°C	-55°C ~ 125°C
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The SSM-113-L-DV is an active product with current manufacturing support, addressing the obsolescence status of the M20-7871346. Both connectors maintain ROHS3 compliance and identical moisture sensitivity ratings.

The SSM-113-L-DV provides enhanced electrical performance with higher current rating (5.2A per contact versus 3A) and extended operating temperature range (-55°C to 125°C versus -40°C to 105°C). The gold contact finish on the mating surface of the SSM-113-L-DV offers improved corrosion resistance compared to the tin finish of the M20-7871346.

Mechanical compatibility is maintained across all critical dimensions and mating parameters. The insulation height difference of 0.005" (0.13mm) is within typical manufacturing tolerances and does not affect functional interchangeability.

Frequently Asked Questions (FAQ)

Q: Are the M20-7871346 and SSM-113-L-DV mechanically interchangeable?

A: Yes. Both connectors share identical mating pitch (0.100"), row spacing (0.100"), position count (26), and push-pull fastening mechanism. Insulation heights differ by 0.005" (0.13mm), which is within standard tolerance ranges and does not affect mating compatibility.

Q: What is the primary difference in contact finish between these connectors?

A: The M20-7871346 features tin contact finish on mating surfaces, while the SSM-113-L-DV uses gold plating (10.0µin / 0.25µm) on mating surfaces. Gold provides superior corrosion resistance and lower contact resistance over extended service life.

Q: Does the SSM-113-L-DV meet the same compliance requirements?

A: Yes. Both connectors are ROHS3 compliant and carry identical moisture sensitivity level ratings (MSL 1 - Unlimited). Both are REACH unaffected and classified under ECCN EAR99.

Q: What are the electrical performance differences?

A: The SSM-113-L-DV supports higher current per contact (5.2A versus 3A) and extended operating temperature range (-55°C to 125°C versus -40°C to 105°C). Voltage ratings differ: M20-7871346 is rated 1000V, while SSM-113-L-DV is rated 405VAC or 572VDC. Application requirements determine which rating is appropriate.

Q: What insulation materials are used in each connector?

A: The M20-7871346 uses Polyamide (PA6T) Nylon 6T insulation. The SSM-113-L-DV uses Liquid Crystal Polymer (LCP) insulation, which offers improved thermal and chemical resistance properties.

Q: Is the SSM-113-L-DV available in production quantities?

A: Yes. The SSM-113-L-DV is classified as an active product with current manufacturing support, ensuring availability for new designs and production requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message