3M 3408-5305 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3408-5305 is a through-hole, right-angle rectangular connector header with 8 positions at 2.54mm pitch. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement. The connector features shrouded 4-wall construction with wire wrap termination and gold-plated mating contacts suitable for board-to-board or cable applications.

Substiute Parts

3408-5305

3MIn Stock: 11453408-5305 Datasheet

Current PartRFQ

CWN-522-16-0021

CW IndustriesIn Stock: 985CWN-522-16-0021 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3M 3408-5305 is constrained by the following critical parameters:

• Pitch and Position Count: The 2.54mm mating pitch and 8-position configuration define the physical footprint and mating interface. Substitute parts must maintain these specifications for direct PCB compatibility.
• Mounting and Orientation: Through-hole, right-angle mounting is required to match the original installation method and board layout.
• Shrouding Configuration: The 4-wall shrouded design provides mechanical alignment and polarization. Substitute parts must retain this feature.
• Termination Method: Wire wrap termination is specified for the original design. Substitute parts must support this connection method.
• Contact Material and Finish: Gold-plated mating contacts ensure reliable signal transmission and corrosion resistance. Substitute parts must maintain gold plating on mating surfaces.
• Environmental Compliance: RoHS compliance and UL94 V-0 flammability rating are mandatory for regulatory and safety requirements.

The CW Industries CWN-522-16-0021 is presented as a manufacturer-recommended alternative. However, this part exhibits a critical deviation: it provides 16 positions instead of 8. This difference in position count makes it unsuitable as a direct electrical and mechanical substitute for the 3M 3408-5305 without circuit redesign and PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

The CW Industries CWN-522-16-0021 shares identical pitch, row spacing, mounting orientation, shrouding, and termination method with the 3M 3408-5305. Both parts meet UL94 V-0 flammability requirements and RoHS compliance standards. The CW Industries part provides an extended operating temperature range (-55°C ~ 125°C versus -55°C ~ 105°C), which represents an operational advantage.

The critical distinction is the position count: the CW Industries part provides 16 positions versus the 8 positions of the original 3M connector. This difference requires evaluation at the circuit and PCB design level. If the application requires exactly 8 positions, the 16-position alternative cannot serve as a direct substitute without circuit modification. If the application can accommodate or benefit from additional positions, the CW Industries part offers active product status and extended temperature performance.

Frequently Asked Questions (FAQ)

Q: Can the CW Industries CWN-522-16-0021 be used as a direct replacement for the 3M 3408-5305?

A: Direct replacement is not possible without circuit and PCB redesign. The CW Industries part provides 16 positions instead of 8. The mating pitch, row spacing, mounting method, and contact configuration are compatible, but the increased position count requires layout modification.

Q: What is the significance of the position count difference?

A: Position count determines the physical footprint and the number of signal connections. An 8-position connector occupies a smaller board area and accommodates 8 signal paths. A 16-position connector requires double the board space and supports 16 signal paths. Substitution requires that the PCB layout and circuit design accommodate the larger connector footprint.

Q: Are the contact materials compatible between these parts?

A: The 3M 3408-5305 uses copper alloy contacts with gold plating. The CW Industries CWN-522-16-0021 uses phosphor bronze contacts with gold plating on mating surfaces and nickel plating on posts. Both materials are suitable for wire wrap termination and provide reliable electrical performance. The contact material difference does not affect mating compatibility but reflects different manufacturing approaches.

Q: Does the extended temperature range of the CW Industries part affect compatibility?

A: The CW Industries part operates from -55°C to 125°C, compared to -55°C to 105°C for the 3M part. This extended range does not create incompatibility; it indicates the CW Industries part can operate in a broader temperature envelope. If the application operates within the original -55°C to 105°C range, both parts are suitable from a thermal perspective.

Q: What compliance certifications apply to both parts?

A: Both parts meet UL94 V-0 flammability requirements and RoHS compliance standards. The CW Industries part carries ROHS3 compliance, which represents the current regulatory standard. Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling is required during storage or assembly.