3M 951122-4620-AR-TP Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 951122-4620-AR-TP is a surface mount, right-angle rectangular connector header with 22 positions at 0.079" (2.00mm) pitch. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The connector features male pins, unshrouded design, and solder termination with push-pull fastening. Equivalent parts must maintain the same electrical and mechanical interface specifications to ensure direct board-level compatibility.

Substiute Parts

951122-4620-AR-TP

3MIn Stock: 753951122-4620-AR-TP Datasheet

Current PartRFQ

MMT-122-01-L-SH

Samtec Inc.In Stock: 733MMT-122-01-L-SH Datasheet

MFR RecommendedRFQ

MMT-122-01-S-SH-A-TR

Samtec Inc.In Stock: 1067MMT-122-01-S-SH-A-TR Datasheet

MFR RecommendedRFQ

MMT-122-01-S-SH-P

Samtec Inc.In Stock: 1026MMT-122-01-S-SH-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Equivalent substitution for the 3M 951122-4620-AR-TP is determined by the following critical parameters:

• Connector Interface: Header type with 22 male pins in single row configuration
• Pitch Specification: 0.079" (2.00mm) mating pitch for PCB footprint compatibility
• Mounting Configuration: Surface mount, right-angle orientation for identical board layout
• Electrical Interface: Push-pull fastening, solder termination, and gold-plated mating contacts
• Physical Dimensions: Insulation height of 0.079" (2.00mm) and square contact geometry
• Environmental Compliance: UL94 V-0 flammability rating and MSL 1 moisture sensitivity

The Samtec MMT series connectors (MMT-122-01-L-SH, MMT-122-01-S-SH-A-TR, and MMT-122-01-S-SH-P) satisfy all critical substitution criteria. These parts maintain identical mating pitch, position count, mounting type, and contact configuration. Differences in contact material (phosphor bronze vs. copper alloy), insulation material (LCP vs. thermoplastic), and current rating (3A vs. 1A) represent performance enhancements rather than compatibility barriers, as the substitute parts exceed or match the original specifications.

Parameter Comparison

Engineering Selection Recommendations

All three Samtec MMT series connectors are active products with ROHS3 compliance, providing long-term availability and regulatory alignment compared to the obsolete 3M 951122-4620-AR-TP.

MMT-122-01-L-SH: Standard configuration suitable for applications requiring board-to-board connectivity. Offers 3A current rating and extended operating temperature range (-55°C ~ 125°C) with minimal contact finish thickness (10.0µin / 0.25µm).

MMT-122-01-S-SH-A-TR: Includes board guide feature for enhanced mechanical alignment during assembly. Contact finish thickness of 30.0µin (0.76µm) provides increased durability. Recommended for applications requiring precision positioning and higher reliability margins.

MMT-122-01-S-SH-P: Incorporates pick-and-place feature for automated assembly processes. Identical electrical and thermal specifications to MMT-122-01-S-SH-A-TR with optimized manufacturing handling characteristics.

Selection between substitute parts depends on assembly methodology and mechanical alignment requirements rather than electrical compatibility, as all three maintain identical mating interface specifications.

Frequently Asked Questions (FAQ)

Q: Can the Samtec MMT-122 series directly replace the 3M 951122-4620-AR-TP on existing PCBs?

A: Yes. The MMT-122 series maintains identical mating pitch (0.079" / 2.00mm), position count (22), contact configuration (male pins, square geometry), and mounting orientation (surface mount, right angle). PCB footprints are compatible without modification.

Q: What is the significance of the contact material difference (phosphor bronze vs. copper alloy)?

A: Phosphor bronze in the Samtec parts provides superior spring characteristics and contact durability compared to copper alloy. This represents a performance enhancement that does not affect electrical interface compatibility.

Q: How do the operating temperature ranges differ, and does this affect substitution?

A: The 3M part operates from -25°C to 105°C, while Samtec parts operate from -55°C to 125°C. The Samtec range encompasses the original specification, making substitution valid for all applications within the original temperature envelope.

Q: What is the difference between the three Samtec substitute part numbers?

A: MMT-122-01-L-SH is the base configuration. MMT-122-01-S-SH-A-TR adds a board guide feature for improved alignment. MMT-122-01-S-SH-P includes pick-and-place optimization for automated assembly. All three are electrically and mechanically equivalent at the mating interface.

Q: Does the higher current rating (3A vs. 1A) in the Samtec parts affect compatibility?

A: No. Higher current rating indicates enhanced capability and does not create compatibility issues. Applications designed for 1A operation function identically with 3A-rated connectors.

Q: Are the Samtec parts RoHS compliant?

A: Yes. All three Samtec MMT-122 variants are ROHS3 compliant, providing regulatory alignment for modern manufacturing and end-market requirements.

Q: What is the difference between LCP and thermoplastic insulation materials?

A: Liquid Crystal Polymer (LCP) in the Samtec parts offers superior dimensional stability, lower moisture absorption, and better high-temperature performance compared to thermoplastic. This represents a material upgrade that maintains mechanical compatibility while improving long-term reliability.