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3M 951266-2520-AR-TP Equivalent & Substitute Parts
Part Overview
The 3M 951266-2520-AR-TP is a rectangular connector header for surface mount applications, featuring 66 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 solder termination.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 951266-2520-AR-TP |
| Manufacturer | 3M |
| Category | Rectangular Connectors |
| Connector Type | Header |
| Contact Type | Male Pin |
| Number of Positions | 66 |
| Number of Rows | 2 |
| Pitch - Mating | 0.079" (2.00mm) |
| Row Spacing - Mating | 0.079" (2.00mm) |
| Mounting Type | Surface Mount |
| Termination | Solder |
| Fastening Type | Push-Pull |
| Contact Finish - Mating | Gold |
| Operating Temperature | -25°C ~ 105°C |
| Current Rating | 1A |
| Material Flammability Rating | UL94 V-0 |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute parts for the 3M 951266-2520-AR-TP are selected from the Samtec Inc. MMT-133 series based on the following critical parameters that must match or exceed the original specification:
Mandatory Matching Parameters:
- Number of Positions: 66
- Number of Rows: 2
- Pitch - Mating: 0.079" (2.00mm)
- 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
- Contact Finish - Mating: Gold
- Insulation Material: Thermoplastic or Liquid Crystal Polymer (LCP)
- Material Flammability Rating: UL94 V-0
Performance Enhancements in Substitutes: The Samtec MMT-133 series substitutes provide improved specifications compared to the obsolete 3M part:
- Operating Temperature: -55°C ~ 125°C (versus -25°C ~ 105°C)
- Current Rating: 3A (versus 1A)
- Product Status: Active (versus Obsolete)
- RoHS3 Compliance available
The MMT-133 series is grouped into variants based on contact finish thickness (F or L designation) and optional features (Board Guide, Board Lock, Pick and Place capability).
Parameter Comparison
| Parameter | 3M 951266-2520-AR-TP | Samtec MMT-133 Series |
|---|---|---|
| Manufacturer | 3M | Samtec Inc. |
| Number of Positions | 66 | 66 |
| Number of Rows | 2 | 2 |
| Pitch - Mating | 0.079" (2.00mm) | 0.079" (2.00mm) |
| Row Spacing - Mating | 0.079" (2.00mm) | 0.079" (2.00mm) |
| Connector Type | Header | Header |
| Contact Type | Male Pin | Male Pin |
| Mounting Type | Surface Mount | Surface Mount |
| Termination | Solder | Solder |
| Fastening Type | Push-Pull | Push-Pull |
| Contact Length - Mating | 0.157" (4.00mm) | 0.126" (3.20mm) |
| Insulation Height | 0.060" (1.52mm) | 0.079" (2.00mm) |
| Contact Shape | Square | Square |
| Contact Finish - Mating | Gold | Gold |
| Contact Material | Copper Alloy | Phosphor Bronze |
| Insulation Material | Thermoplastic | Liquid Crystal Polymer (LCP) |
| Operating Temperature | -25°C ~ 105°C | -55°C ~ 125°C |
| Current Rating (Amps) | 1A | 3A |
| Material Flammability Rating | UL94 V-0 | UL94 V-0 |
| Insulation Color | Black | Black |
| Product Status | Obsolete | Active |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| ECCN | EAR99 | EAR99 |
| HTSUS | 8536.69.4040 | 8536.69.4040 |
Engineering Selection Recommendations
Primary Recommendation: Samtec MMT-133 Series
The Samtec MMT-133 series provides direct functional equivalence to the 3M 951266-2520-AR-TP with the following advantages:
-
Active Product Status: All MMT-133 variants are active products with ongoing manufacturer support, ensuring long-term availability and supply chain stability.
-
Enhanced Thermal Performance: Operating temperature range of -55°C ~ 125°C exceeds the original specification of -25°C ~ 105°C, providing broader application flexibility.
-
Increased Current Capacity: 3A current rating versus 1A in the original part allows for higher power delivery in the same form factor.
-
RoHS3 Compliance: All MMT-133 variants meet RoHS3 requirements, supporting regulatory compliance for new designs.
-
Improved Insulation Material: Liquid Crystal Polymer (LCP) insulation provides superior dimensional stability and thermal performance compared to thermoplastic.
Variant Selection Criteria:
- MMT-133-01-F-DV: Standard configuration with 3.00µin (0.076µm) gold finish thickness
- MMT-133-01-F-DV-A-P: Includes Board Guide and Pick and Place features
- MMT-133-01-F-DV-A-TR: Includes Board Guide feature
- MMT-133-01-F-DV-LC-P: Includes Board Lock and Pick and Place features
- MMT-133-01-F-DV-LC-TR: Includes Board Lock feature
- MMT-133-01-L-DV: Standard configuration with 10.0µin (0.25µm) gold finish thickness
- MMT-133-01-L-DV-A-P: Includes Board Guide and Pick and Place features with enhanced gold finish
- MMT-133-01-L-DV-A-TR: Includes Board Guide feature with enhanced gold finish
- MMT-133-01-L-DV-LC-P: Includes Board Lock and Pick and Place features with enhanced gold finish
- MMT-133-01-L-DV-LC-TR: Includes Board Lock feature with enhanced gold finish
Select the L-series variant for applications requiring enhanced contact durability through increased gold plating thickness. Select variants with Board Guide (A) or Board Lock (LC) features based on assembly process requirements and mechanical alignment needs.
Frequently Asked Questions (FAQ)
Q: Are Samtec MMT-133 connectors mechanically compatible with the 3M 951266-2520-AR-TP?
A: Yes. Both connectors share identical mating pitch (0.079" / 2.00mm), row spacing (0.079" / 2.00mm), position count (66), and row configuration (2 rows). The contact length difference (0.157" versus 0.126" mating length) does not affect mechanical compatibility with standard mating connectors designed for 2.00mm pitch headers.
Q: What is the difference between the F and L contact finish variants?
A: The F-series (MMT-133-01-F-DV) features 3.00µin (0.076µm) gold plating thickness, while the L-series (MMT-133-01-L-DV) features 10.0µin (0.25µm) gold plating thickness. The L-series provides enhanced contact durability and wear resistance for applications with frequent mating cycles.
Q: Can I use the MMT-133 series in existing designs without PCB layout modifications?
A: The identical pitch and row spacing allow direct substitution in most applications. However, verify that the insulation height difference (0.079" for MMT-133 versus 0.060" for 951266-2520-AR-TP) does not conflict with PCB clearance requirements or mating connector specifications.
Q: What do the Board Guide and Board Lock features provide?
A: Board Guide (A designation) provides mechanical alignment assistance during assembly. Board Lock (LC designation) provides mechanical retention after mating. Select based on your assembly process requirements and whether additional mechanical security is needed.
Q: Are all MMT-133 variants RoHS3 compliant?
A: Yes. All Samtec MMT-133 series variants listed are RoHS3 compliant, supporting regulatory requirements for new product designs.
Q: What is the inventory status for these substitute parts?
A: All MMT-133 variants maintain active inventory ranging from 767 to 1106 pieces in stock, ensuring reliable supply availability for production requirements.
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