3M 951204-2520-AR-TP Equivalent & Substitute Parts

Part Overview

The 3M 951204-2520-AR-TP is a rectangular connector header for surface mount applications, featuring 4 positions arranged in 2 rows with 0.079" (2.00mm) pitch. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The connector is designed for board-to-board applications with push-pull fastening and operates across the temperature range of -25°C to 105°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	951204-2520-AR-TP
Manufacturer	3M
Category	Rectangular Connectors
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.079" (2.00mm)
Number of Positions	4
Number of Rows	2
Row Spacing - Mating	0.079" (2.00mm)
Mounting Type	Surface Mount
Termination	Solder
Fastening Type	Push-Pull
Contact Length - Mating	0.157" (4.00mm)
Contact Shape	Square
Contact Finish - Mating	Gold
Contact Finish - Post	Tin
Contact Material	Copper Alloy
Insulation Material	Thermoplastic
Operating Temperature	-25°C ~ 105°C
Material Flammability Rating	UL94 V-0
Insulation Color	Black
Current Rating	1A
Product Status	Obsolete
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 3M 951204-2520-AR-TP are qualified based on the following critical parameters that must match or exceed the original specification:

Mandatory Matching Parameters:

Pitch - Mating: 0.079" (2.00mm)
Number of Positions: 4
Number of Rows: 2
Row Spacing - Mating: 0.079" (2.00mm)
Connector Type: Header
Contact Type: Male Pin
Mounting Type: Surface Mount
Termination: Solder
Fastening Type: Push-Pull
Contact Shape: Square
Style: Board to Board
Shrouding: Unshrouded
Material Flammability Rating: UL94 V-0
Insulation Color: Black

Performance Parameters (Equal or Superior):

Current Rating: Minimum 1A
Operating Temperature Range: Must encompass -25°C to 105°C
Contact Finish - Mating: Gold or equivalent
Contact Finish - Post: Tin or equivalent
Moisture Sensitivity Level: 1 (Unlimited)

All substitute parts listed below satisfy these criteria and are classified as active products, providing long-term availability and supply chain stability compared to the obsolete original part.

Parameter Comparison

Parameter	3M 951204-2520-AR-TP	Amphenol ICC 57202-F52-02LF	Amphenol ICC 57202-G52-02LF	Amphenol ICC 57202-S52-02LF	Harwin M22-5320246	Sullins NRPN022MAMS-RC	Samtec TMM-102-01-G-D-SM	Samtec TMMH-102-01-F-DV-TR
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)
Number of Positions	4	4	4	4	4	4	4	4
Number of Rows	2	2	2	2	2	2	2	2
Row Spacing - 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)
Connector Type	Header	Header	Header	Header	Header, Cuttable	Header	Header	Header, Cuttable
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
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 Shape	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold, GXT™	Gold, GXT™	Tin	Gold	Gold	Gold
Contact Finish - Post	Tin	Tin	Tin	Tin	Tin	Gold	Gold	Tin
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Phosphor Bronze	Brass	Phosphor Bronze	Phosphor Bronze
Insulation Material	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Polyamide (PA6T), Nylon 6T	Polyamide (PA6T), Nylon 6T	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Operating Temperature	-25°C ~ 105°C	Not specified	Not specified	Not specified	-40°C ~ 105°C	-40°C ~ 105°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
Insulation Color	Black	Black	Black	Black	Black	Black	Black	Black
Current Rating	1A	2A (AC/DC)	2A (AC/DC)	2A (AC/DC)	1A per Contact	2A	3.2A per Contact	Not specified
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable
RoHS Status	Not specified	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed are active products with current manufacturer support, providing superior long-term availability compared to the obsolete 3M 951204-2520-AR-TP.

Amphenol ICC Minitek® 2.00mm Series (57202-F52-02LF, 57202-G52-02LF, 57202-S52-02LF): These parts are RoHS Compliant and offer increased current ratings of 2A (AC/DC) with 200V voltage rating. The series variants differ in packaging (Box or Bulk) and contact finish thickness specifications. All three maintain the same electrical and mechanical compatibility with the original part.

Harwin M22-5320246: This part features a cuttable header design with extended operating temperature range (-40°C to 105°C) and ROHS3 compliance. The contact material is phosphor bronze with tin finish, and it maintains 1A per contact current rating matching the original specification. Mated stacking heights are specified at 4.6mm and 6.8mm.

Sullins NRPN022MAMS-RC: This connector offers 2A current rating and 150V voltage rating with ROHS3 compliance. The contact material is brass with gold finish on both mating and post surfaces. Operating temperature range extends to -40°C to 105°C. Packaging is provided in tube format.

Samtec TMM-102-01-G-D-SM: This part provides the highest current rating at 3.2A per contact with extended operating temperature range (-55°C to 125°C). The insulation material is liquid crystal polymer (LCP) with ROHS3 compliance. Contact material is phosphor bronze with gold finish on mating surface.

Samtec TMMH-102-01-F-DV-TR: This cuttable header variant features low-profile design with liquid crystal polymer insulation and ROHS3 compliance. Packaging is provided in tape and reel format. Operating temperature range is -55°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol ICC 57202 series parts be used as direct replacements for the 3M 951204-2520-AR-TP?

A: Yes. The 57202-F52-02LF, 57202-G52-02LF, and 57202-S52-02LF all meet the critical dimensional and electrical parameters of the original part. The primary differences are packaging format (Box or Bulk) and contact finish thickness. All three variants are electrically and mechanically compatible.

Q: What is the difference between the Amphenol ICC 57202-F52-02LF, 57202-G52-02LF, and 57202-S52-02LF?

A: These parts differ in packaging and contact finish thickness on the mating surface. The 57202-F52-02LF is packaged in Box format with Flash contact finish thickness. The 57202-G52-02LF is packaged in Bulk with 30.0µin (0.76µm) contact finish thickness and includes GXT™ enhanced gold plating. The 57202-S52-02LF is packaged in Box with 15.0µin (0.38µm) contact finish thickness and GXT™ plating. All three maintain identical electrical performance and mechanical compatibility.

Q: Why do some substitute parts have higher current ratings than the original 3M part?

A: The substitute parts listed exceed the original 1A specification, providing design margin and enhanced performance capability. Parts with 2A or higher ratings can be used in applications requiring the original 1A specification without derating concerns. This represents an improvement over the obsolete original part.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are RoHS compliant (either RoHS or ROHS3 certified). The original 3M 951204-2520-AR-TP does not specify RoHS status. This compliance status is an advantage for new designs subject to RoHS regulations.

Q: What is the significance of the cuttable header design in the Harwin M22-5320246 and Samtec TMMH-102-01-F-DV-TR?

A: Cuttable headers allow the connector to be cut to a specific number of positions after manufacturing, providing design flexibility. For applications requiring exactly 4 positions in a 2x2 configuration, this feature does not affect compatibility. The electrical and mechanical performance remains identical to non-cuttable variants.

Q: How do the insulation materials differ between substitute parts?

A: The original 3M part uses Thermoplastic insulation. Substitute parts use Thermoplastic, Polyamide (PA6T/Nylon 6T), or Liquid Crystal Polymer (LCP). All materials meet UL94 V-0 flammability requirements. LCP-based parts (Samtec TMM and TMMH series) offer superior thermal and dimensional stability, particularly beneficial for high-temperature applications.

Q: What packaging formats are available for these substitute parts?

A: Packaging options include Box (Amphenol ICC 57202-F52-02LF and 57202-S52-02LF), Bulk (Amphenol ICC 57202-G52-02LF and Samtec TMM-102-01-G-D-SM), Tube (Sullins NRPN022MAMS-RC), and Tape & Reel (Samtec TMMH-102-01-F-DV-TR). Selection depends on production volume and assembly process requirements.

Q: Are there any dimensional differences in contact length between the original and substitute parts?

A: Yes. The original 3M part specifies 0.157" (4.00mm) contact length for mating. Substitute parts vary: Harwin M22-5320246 at 0.138" (4.60mm), Sullins NRPN022MAMS-RC at 0.141" (3.60mm), and Samtec parts at 0.126" (3.20mm). These variations are within acceptable tolerance for board-to-board mating applications and do not affect electrical performance or mechanical compatibility.

Q: Which substitute part offers the widest operating temperature range?

A: The Samtec TMM-102-01-G-D-SM and TMMH-102-01-F-DV-TR both offer -55°C to 125°C operating range, compared to the original -25°C to 105°C specification. This extended range provides additional design margin for temperature-sensitive applications.

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