3M 951120-4620-AR-TP Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 951120-4620-AR-TP is a surface mount, right-angle rectangular connector header with 20 positions at 2.00mm pitch. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The connector features male pins with gold-plated mating contacts, tin-plated posts, and operates across the temperature range of -25°C to 105°C. Substitution is required to ensure design continuity and component availability.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.079" (2.00mm)
Number of Positions	20
Number of Rows	1
Mounting Type	Surface Mount, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Contact Finish - Post	Tin
Insulation Material	Thermoplastic
Material Flammability Rating	UL94 V-0
Current Rating	1A
Operating Temperature	-25°C ~ 105°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 3M 951120-4620-AR-TP is determined by strict alignment of the following critical parameters:

Connector type: Header
Contact type: Male pin
Pitch: 0.079" (2.00mm)
Number of positions: 20
Number of rows: 1
Mounting type: Surface mount, right angle
Termination: Solder
Fastening type: Push-pull
Insulation material composition
Flammability rating: UL94 V-0
Contact finish specifications

All substitute parts listed maintain these core electrical and mechanical parameters. Variations in contact length, contact finish thickness, insulation material type (thermoplastic versus liquid crystal polymer), current rating, and operating temperature range are secondary parameters that do not prevent functional substitution within the defined application envelope.

Parameter Comparison

Parameter	3M 951120-4620-AR-TP	Amphenol ICC 10112684-G03-20ULF	Samtec MMT-120-01-F-SH-A-P-TR	Samtec MMT-120-01-F-SH-P-TR	Samtec MMT-120-01-FM-SH	Samtec MMT-120-01-H-SH	Samtec MMT-120-01-L-SH	Samtec MMT-120-01-L-SH-K-TR	Samtec MMT-120-01-L-SH-LC	Samtec MMT-120-01-L-SH-P-TR	Samtec MMT-120-01-L-SH-TR
Connector Type	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Pitch - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Number of Positions	20	20	20	20	20	20	20	20	20	20	20
Number of Rows	1	1	1	1	1	1	1	1	1	1	1
Mounting Type	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle	Surface Mount, Right Angle
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	0.175" (4.45mm)	0.157" (4.00mm)	0.126" (3.20mm)	0.126" (3.20mm)	0.126" (3.20mm)	0.126" (3.20mm)	0.126" (3.20mm)	0.126" (3.20mm)	0.126" (3.20mm)	0.126" (3.20mm)	0.126" (3.20mm)
Insulation Height	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold or Gold, GXT™	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold
Contact Finish - Post	Tin	Tin	Tin	Tin	Tin	Gold	Tin	Tin	Tin	Tin	Tin
Contact Material	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Insulation Material	Thermoplastic	Thermoplastic, Glass Filled	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Operating Temperature	-25°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°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
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black	Black
Current Rating (Amps)	1A	2A (AC/DC)	3A	3A	3A	3A	3A	3A	3A	3A	3A
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	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	Active	Active	Active
RoHS Status	Not specified	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain functional equivalence to the 3M 951120-4620-AR-TP based on core connector parameters: 20-position, 2.00mm pitch, surface mount right-angle header with male pins, solder termination, and push-pull fastening.

The Amphenol ICC 10112684-G03-20ULF provides the closest mechanical profile with a contact length of 0.157" (4.00mm), compared to the original 0.175" (4.45mm). This part is RoHS Compliant and rated for 2A current with an extended operating temperature range of -55°C to 125°C.

The Samtec MMT series (MMT-120-01-L-SH, MMT-120-01-L-SH-TR, MMT-120-01-L-SH-K-TR, MMT-120-01-L-SH-LC, and MMT-120-01-L-SH-P-TR) offers the broadest availability and ROHS3 compliance. These variants differ in packaging format (tube or tape & reel), contact finish thickness, and optional features such as pick-and-place compatibility or board lock mechanisms. All Samtec MMT variants operate at 3A current rating and -55°C to 125°C temperature range.

The MMT-120-01-H-SH variant features gold plating on both mating and post contacts, distinguishing it from standard tin-post configurations. The MMT-120-01-FM-SH and MMT-120-01-F-SH-P-TR variants provide alternative contact finish specifications with reduced gold thickness.

Selection should prioritize active product status and compliance certifications. All substitute parts carry UL94 V-0 flammability ratings and MSL 1 moisture sensitivity levels, matching the original specification.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol ICC 10112684-G03-20ULF be used as a direct replacement for the 3M 951120-4620-AR-TP?

A: Yes. Both connectors share identical core specifications: 20-position, 2.00mm pitch, surface mount right-angle header with male pins, solder termination, and push-pull fastening. The Amphenol part has a slightly shorter contact length (0.157" versus 0.175") and higher current rating (2A versus 1A), making it functionally compatible. The extended operating temperature range (-55°C to 125°C versus -25°C to 105°C) provides additional thermal margin.

Q: What is the difference between the various Samtec MMT-120 variants?

A: The Samtec MMT-120 series maintains identical electrical and mechanical core specifications across all variants. Differences are limited to: packaging format (tube versus tape & reel), contact finish thickness (3.00µin, 10.0µin, or 30.0µin gold), post contact finish (tin or gold), and optional features (pick-and-place compatibility, board lock mechanism). All variants are rated for 3A current and -55°C to 125°C operation.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (tube, tape & reel, or bulk) does not affect electrical or mechanical performance. Selection should be based on manufacturing process requirements and inventory management practices.

Q: Are all substitute parts RoHS compliant?

A: The Amphenol ICC 10112684-G03-20ULF is RoHS Compliant. All Samtec MMT-120 variants are ROHS3 Compliant. The original 3M part does not specify RoHS status. For applications requiring RoHS compliance, any of the listed substitutes are acceptable.

Q: What is the significance of contact finish thickness variations?

A: Contact finish thickness (measured in microinches or micrometers) affects contact durability and wear resistance. Thicker gold plating (30.0µin or 10.0µin) provides extended mating cycle life compared to thinner finishes (3.00µin). Selection should align with expected mating cycle requirements and application environment.

Q: Can the MMT-120-01-H-SH with gold-plated posts be substituted for the standard tin-post variants?

A: Yes. The MMT-120-01-H-SH is electrically and mechanically equivalent to other MMT-120 variants. The gold post finish provides enhanced corrosion resistance compared to tin, making it suitable for applications requiring extended shelf life or harsh environmental exposure.

Q: What is the board lock feature on the MMT-120-01-L-SH-LC?

A: The board lock feature provides mechanical retention of the connector to the PCB during assembly and operation. This feature does not affect electrical performance and is optional based on mechanical assembly requirements.

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