951224-2520-AR-TP Equivalent & Substitute Parts

Part Overview

The 951224-2520-AR-TP is a rectangular connector header manufactured by 3M, designed for surface mount board-to-board applications with 24 positions arranged in 2 rows at 0.079" (2.00mm) pitch. This connector features male pins with gold-plated mating contacts and tin-plated posts, rated for 1A current at operating temperatures from -25°C to 105°C. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
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)
Mounting Type	Surface Mount
Style	Board to Board
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Contact Material	Copper Alloy
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 eligibility for the 951224-2520-AR-TP is determined by strict alignment of the following parameters:

Connector type: Header with male pin contacts
Position count and arrangement: 24 positions in 2 rows
Pitch specification: 0.079" (2.00mm) mating pitch and row spacing
Mounting method: Surface mount solder termination
Style classification: Board-to-board connectivity
Fastening mechanism: Push-pull engagement
Contact finish: Gold-plated mating surface
Insulation material: Thermoplastic or equivalent
Flammability rating: UL94 V-0 minimum
Moisture sensitivity: MSL 1

The substitute parts listed below meet these core electrical and mechanical parameters. Variations in current rating, operating temperature range, contact material composition, and contact finish thickness are noted where they differ from the original specification.

Parameter Comparison

Parameter	951224-2520-AR-TP (3M)	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, Cuttable
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	24	24	24	24	24
Number of Rows	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)
Row Spacing - Mating	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)	0.079" (2.00mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Style	Board to Board	Board to Board	Board to Board	Board to Board or Cable	Board to Board or Cable
Termination	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold (Flash)	Gold (Flash)	Gold, GXT™ (30.0µin)	Gold (30.0µin)	Gold (30.0µin)
Contact Material	Copper Alloy	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze
Insulation Material	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
Insulation Color	Black	Black	Black	Black	Black
Current Rating	1A	2A (AC/DC)	2A (AC/DC)	3A	Not specified
Operating Temperature	-25°C ~ 105°C	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)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not specified	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain active product status with current manufacturer support, addressing the obsolescence of the original 951224-2520-AR-TP. Selection among substitutes should be based on the following criteria:

Amphenol ICC (FCI) Minitek® 2.00mm Series (57202-F52-12LF, 57202-G52-12LF): These parts provide direct functional equivalence with identical connector geometry and pitch specifications. Both are RoHS Compliant and offer higher current ratings (2A) than the original specification. The 57202-F52-12LF is packaged in boxes, while 57202-G52-12LF is supplied in bulk. The 57202-G52-12LF features GXT™ contact finish technology with specified thickness of 30.0µin (0.76µm).

Samtec MMT-112-01-S-DV-A-P: This part extends the operating temperature range to -55°C ~ 125°C and provides higher current capacity (3A). It features phosphor bronze contacts with liquid crystal polymer insulation and includes board guide and pick-and-place features. ROHS3 Compliant status is provided. The contact length at mating is 0.126" (3.20mm) compared to 0.157" (4.00mm) in the original.

Samtec TMMH-112-01-S-DV-A-M: This cuttable header variant offers the same electrical and mechanical compatibility as the MMT-112-01-S-DV-A-P with extended temperature range (-55°C ~ 125°C) and ROHS3 Compliant certification. The cuttable design allows customization of position count for applications requiring fewer than 24 positions.

Frequently Asked Questions (FAQ)

Q: Can the 57202-F52-12LF and 57202-G52-12LF be used interchangeably with the 951224-2520-AR-TP?

A: Yes. Both Amphenol ICC parts meet the core substitution parameters: 24-position, 2-row header with 0.079" (2.00mm) pitch, surface mount solder termination, push-pull fastening, and gold-plated mating contacts. The primary differences are packaging format (box vs. bulk) and contact finish thickness specifications. Both are RoHS Compliant and rated for 2A current.

Q: What are the key differences between the Amphenol ICC and Samtec substitute options?

A: Amphenol ICC parts (57202 series) maintain closer dimensional alignment to the original 951224-2520-AR-TP with thermoplastic insulation. Samtec parts (MMT-112 and TMMH-112 series) use liquid crystal polymer insulation, offer extended operating temperature range (-55°C ~ 125°C vs. unspecified for Amphenol), and provide higher current ratings (3A). The Samtec MMT-112 includes board guide and pick-and-place features. The TMMH-112 variant is cuttable for position customization.

Q: Does the higher current rating of substitute parts affect compatibility?

A: No. Higher current ratings indicate enhanced capability and do not compromise compatibility. The 951224-2520-AR-TP is rated for 1A; substitute parts rated for 2A or 3A can safely handle applications designed for 1A operation. Current rating is a maximum specification, not a requirement.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 57202-F52-12LF and 57202-G52-12LF are RoHS Compliant. The Samtec MMT-112-01-S-DV-A-P and TMMH-112-01-S-DV-A-M are ROHS3 Compliant, indicating compliance with the updated RoHS 3 directive.

Q: What is the significance of the cuttable design in the TMMH-112-01-S-DV-A-M?

A: The cuttable header design allows the connector strip to be separated into smaller segments, enabling use in applications requiring fewer than 24 positions. This feature provides design flexibility without requiring custom part procurement. Electrical and mechanical performance remain identical to the non-cuttable MMT-112 variant.

Q: How do contact material differences affect performance?

A: The original 951224-2520-AR-TP uses copper alloy contacts; substitute Samtec parts use phosphor bronze. Phosphor bronze offers improved spring characteristics and contact reliability. Both materials are suitable for the specified pitch and current ratings. Contact finish (gold plating) provides the primary corrosion resistance in both cases.

Q: Can the Samtec parts be used in applications with the original -25°C ~ 105°C temperature range?

A: Yes. The Samtec parts are rated for -55°C ~ 125°C, which encompasses the original operating range. Extended temperature capability does not limit use in narrower temperature applications.

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