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

Part Overview

The 3M 951120-4620-AR-PR 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, unshrouded design, and solder termination with push-pull fastening. Identifying compatible alternatives ensures design continuity and supply chain reliability for board-to-board and board-to-cable interconnect applications.

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 Shape	Square
Insulation Material	Thermoplastic
Material Flammability Rating	UL94 V-0
Insulation Color	Black
Current Rating	1A
Operating Temperature	-25°C ~ 105°C
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following core parameters:

Pitch and Position Count: All substitutes maintain 0.079" (2.00mm) pitch with 20 positions in a single row
Connector Type and Contact Configuration: Header with male pins, unshrouded design
Mounting and Termination: Surface mount, right-angle orientation with solder termination
Fastening Mechanism: Push-pull fastening type
Electrical and Environmental Compliance: UL94 V-0 flammability rating, MSL 1, ECCN EAR99, HTSUS 8536.69.4040

Substitute parts are grouped into two categories based on manufacturer and contact material composition:

Category A: Amphenol ICC (FCI) Minitek® 2.00mm Series

Part numbers: 10112684-G03-20ULF, 10112684-T03-20ULF
Contact material: Copper Alloy
Insulation material: Thermoplastic, Glass Filled
Enhanced current rating (2A) and voltage rating (200V AC/DC)
Operating temperature range: -55°C ~ 125°C

Category B: Samtec MMT Series

Part numbers: MMT-120-01-F-SH-A-P-TR, MMT-120-01-F-SH-P-TR, MMT-120-01-FM-SH, MMT-120-01-H-SH, MMT-120-01-L-SH, MMT-120-01-L-SH-K-TR, MMT-120-01-L-SH-LC, MMT-120-01-L-SH-P-TR
Contact material: Phosphor Bronze
Insulation material: Liquid Crystal Polymer (LCP)
Enhanced current rating (3A)
Operating temperature range: -55°C ~ 125°C
RoHS3 Compliant

Parameter Comparison

Parameter	3M 951120-4620-AR-PR	Amphenol ICC 10112684-G03-20ULF	Amphenol ICC 10112684-T03-20ULF	Samtec MMT-120-01-L-SH	Samtec MMT-120-01-L-SH-P-TR
Manufacturer	3M	Amphenol ICC (FCI)	Amphenol ICC (FCI)	Samtec Inc.	Samtec Inc.
Product Status	Obsolete	Active	Active	Active	Active
Connector Type	Header	Header	Header	Header	Header
Contact Type	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)
Number of Positions	20	20	20	20	20
Number of Rows	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
Termination	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Shape	Square	Square	Square	Square	Square
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze
Insulation Material	Thermoplastic	Thermoplastic, Glass Filled	Thermoplastic, Glass Filled	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Contact Length - Mating	0.175" (4.45mm)	0.157" (4.00mm)	0.157" (4.00mm)	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)
Contact Finish - Mating	Gold (Flash)	Gold or Gold, GXT™	Tin	Gold	Gold
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	Black	Black	Black	Black	Black
Current Rating	1A	2A (AC/DC)	2A (AC/DC)	3A	3A
Operating Temperature	-25°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	Not specified	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability and supply chain stability compared to the obsolete 3M 951120-4620-AR-PR.

Amphenol ICC Minitek® 2.00mm Series (10112684-G03-20ULF, 10112684-T03-20ULF) are suitable for applications requiring copper alloy contact material with glass-filled thermoplastic insulation. These parts provide 2A current rating and -55°C to 125°C operating temperature range. RoHS Compliant status and REACH Affected designation apply. Contact finish options include gold or tin on mating surfaces.

Samtec MMT Series offers phosphor bronze contact material with liquid crystal polymer insulation, delivering 3A current rating and -55°C to 125°C operating temperature range. All variants are ROHS3 Compliant. Selection among MMT variants depends on specific packaging requirements (tube, tape & reel), contact finish specifications (gold thickness variations), and feature requirements (pick and place, board lock, board guide).

Contact length differences exist between the original part (0.175" mating length) and substitutes (0.157" for Amphenol, 0.126" for Samtec). These dimensional variations must be evaluated against mating connector specifications and PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the 3M 951120-4620-AR-PR with any of the listed substitutes?

A: Direct replacement is possible only if your mating connector accommodates the substitute's contact length. The original part has 0.175" mating contact length, while Amphenol substitutes provide 0.157" and Samtec substitutes provide 0.126". Verify mating connector specifications before substitution.

Q: What is the primary difference between Amphenol ICC and Samtec substitute options?

A: Amphenol ICC substitutes use copper alloy contacts with glass-filled thermoplastic insulation and 2A current rating. Samtec substitutes use phosphor bronze contacts with liquid crystal polymer insulation and 3A current rating. Both meet UL94 V-0 flammability requirements and operate across -55°C to 125°C.

Q: Are all substitute parts RoHS compliant?

A: Yes. Amphenol ICC parts are RoHS Compliant. Samtec parts are ROHS3 Compliant. Both compliance levels satisfy current regulatory requirements.

Q: What packaging options are available for Samtec MMT substitutes?

A: Samtec MMT-120 series is available in tube packaging (MMT-120-01-L-SH) and tape & reel packaging (MMT-120-01-L-SH-K-TR, MMT-120-01-L-SH-P-TR). Tape & reel variants include pick-and-place features suitable for automated assembly.

Q: How do contact finish specifications affect connector performance?

A: Contact finish affects mating force, wear resistance, and corrosion protection. Gold finishes (various thicknesses) provide superior corrosion resistance. Tin finishes offer cost efficiency. The original part specifies gold flash on mating surfaces. Amphenol 10112684-G03-20ULF offers gold or gold GXT™ finish; 10112684-T03-20ULF offers tin finish. Samtec variants offer gold finishes with varying thickness specifications.

Q: What is the significance of the operating temperature range difference?

A: The original 3M part operates -25°C to 105°C. All substitutes operate -55°C to 125°C, providing extended temperature capability. This expanded range is beneficial for applications requiring broader environmental tolerance but does not restrict use in the original temperature specification.

Q: Are there any mechanical compatibility concerns with Samtec MMT variants featuring board lock or board guide features?

A: Board lock (LC suffix) and board guide features are mechanical enhancements that do not affect electrical compatibility. These features provide additional mechanical retention or alignment. Verify that your PCB layout accommodates these features if selecting variants with such specifications.

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