951224-2520-AR-PR Equivalent & Substitute Parts

Part Overview

The 951224-2520-AR-PR is a rectangular connector header manufactured by 3M, designed for surface mount board-to-board applications with 24 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 unshrouded male pin contacts with gold-plated mating surfaces and tin-plated posts, suitable for 1A current applications at operating temperatures between -25°C and 105°C.

Key Parameters

Parameter	Specification
Connector Type	Header
Contact Type	Male Pin
Number of Positions	24
Number of Rows	2
Pitch - Mating	0.079" (2.00mm)
Row Spacing - Mating	0.079" (2.00mm)
Style	Board to Board
Mounting Type	Surface Mount
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Contact Material	Copper Alloy
Insulation Material	Thermoplastic
Material Flammability Rating	UL94 V-0
Operating Temperature	-25°C ~ 105°C
Current Rating	1A
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 951224-2520-AR-PR is determined by the following critical parameters:

Connector Type & Contact Configuration: Header with male pin contacts
Position Count & Arrangement: 24 positions in 2 rows
Pitch Specification: 0.079" (2.00mm) mating pitch and row spacing
Mounting & Termination: Surface mount with solder termination
Fastening Mechanism: Push-pull fastening type
Contact Finish: Gold-plated mating surface with tin-plated posts
Insulation Material: Thermoplastic construction
Flammability Compliance: UL94 V-0 rating
Moisture Sensitivity: MSL 1 (Unlimited)

All substitute parts listed maintain these core parameters, ensuring mechanical and electrical compatibility with the original 951224-2520-AR-PR connector header.

Parameter Comparison

Parameter	951224-2520-AR-PR (3M)	57202-F52-12ALF (Amphenol ICC)	57202-F52-12LF (Amphenol ICC)	57202-G52-12LF (Amphenol ICC)	MMT-112-01-S-DV-A-P (Samtec)	TMMH-112-01-S-DV-A-M (Samtec)
Connector Type	Header	Header	Header	Header	Header	Header, Cuttable
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	24	24	24	24	24	24
Number of Rows	2	2	2	2	2	2
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)
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)
Style	Board to Board	Board to Board	Board to Board	Board to Board	Board to Board or Cable	Board to Board or Cable
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.157" (4.00mm)	0.157" (4.00mm)	0.157" (4.00mm)	0.157" (4.00mm)	0.126" (3.20mm)	0.126" (3.20mm)
Contact Finish - Mating	Gold	Gold	Gold	Gold, GXT™	Gold	Gold
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze
Insulation Material	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Material Flammability Rating	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
Current Rating	1A	2A (AC/DC)	2A (AC/DC)	2A (AC/DC)	3A	Not specified
Operating Temperature	-25°C ~ 105°C	Not specified	Not specified	Not specified	-55°C ~ 125°C	-55°C ~ 125°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not specified	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Amphenol ICC (FCI) Minitek® 2.00mm Series (57202-F52-12ALF, 57202-F52-12LF, 57202-G52-12LF)

These connectors provide direct functional equivalence to the 951224-2520-AR-PR with active product status and RoHS compliance. All three variants maintain identical electrical and mechanical specifications with enhanced current ratings (2A AC/DC) and voltage ratings (200V AC/DC). Selection between these three depends on packaging requirements: 57202-F52-12ALF (Tape & Reel), 57202-F52-12LF (Box), or 57202-G52-12LF (Bulk). All are suitable for applications where the original 1A rating is adequate.

Samtec MMT Series (MMT-112-01-S-DV-A-P)

This connector offers superior electrical performance with 3A current rating and extended operating temperature range (-55°C to 125°C). The phosphor bronze contact material and liquid crystal polymer insulation provide enhanced durability. Contact length is reduced to 0.126" (3.20mm) compared to the original 0.157" (4.00mm), which may require PCB layout verification. This option is recommended for applications requiring higher current capacity or wider temperature operation.

Samtec TMMH Series (TMMH-112-01-S-DV-A-M)

This cuttable header variant provides the same electrical and mechanical compatibility as the MMT series with the additional feature of customizable length. The cuttable design allows position count reduction from the standard 24 positions. Operating temperature range extends to -55°C ~ 125°C. This option is suitable for applications requiring non-standard position counts or flexible connector configurations.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the 951224-2520-AR-PR with any of the listed substitutes?

A: Yes, all listed substitutes maintain the critical parameters: 24 positions, 2.00mm pitch, 2-row configuration, surface mount solder termination, and push-pull fastening. Mechanical and electrical compatibility is ensured. However, verify PCB footprint compatibility, particularly for Samtec variants with reduced contact length (3.20mm vs. 4.00mm).

Q: What is the difference between the three Amphenol ICC variants?

A: The three Amphenol ICC parts (57202-F52-12ALF, 57202-F52-12LF, 57202-G52-12LF) are electrically and mechanically identical. The differences are packaging only: Tape & Reel (TR), Box, and Bulk respectively. Select based on your procurement and assembly process requirements.

Q: Why do the Samtec connectors have different contact length specifications?

A: Samtec MMT and TMMH series use 0.126" (3.20mm) contact length versus the original 3M 0.157" (4.00mm). This shorter length may affect mating depth and PCB pad design. Verify your PCB layout accommodates this specification before selection.

Q: Are all substitutes RoHS compliant?

A: Yes. Amphenol ICC variants are RoHS Compliant. Samtec variants are ROHS3 Compliant. The original 951224-2520-AR-PR RoHS status is not specified.

Q: What is the current rating difference, and does it matter?

A: The original part is rated 1A. Amphenol ICC substitutes are rated 2A (AC/DC), and Samtec MMT is rated 3A. Higher ratings provide design margin and are backward compatible with 1A applications. The TMMH variant does not specify current rating; contact Samtec for this specification.

Q: Can I use the Samtec TMMH cuttable header if I need fewer than 24 positions?

A: Yes. The TMMH-112-01-S-DV-A-M is specifically designed as a cuttable header strip, allowing customization to your required position count while maintaining all electrical and mechanical specifications.

Q: What packaging options are available?

A: Amphenol ICC offers three packaging options: Tape & Reel (57202-F52-12ALF), Box (57202-F52-12LF), and Bulk (57202-G52-12LF). Samtec MMT is supplied in Tube packaging. Samtec TMMH packaging is not specified. Confirm packaging availability with your supplier.

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