BU-31103-2 Equivalent & Substitute Parts

Part Overview

The BU-31103-2 is a stackable banana plug connector manufactured by Mueller Electric Co, designed for solder termination with standard banana plug diameter and free-hanging (in-line) mounting. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring compatible functionality.

Substiute Parts

BU-31103-2

Mueller Electric CoIn Stock: 1117BU-31103-2 Datasheet

Current PartRFQ

BU-31104-2

Mueller Electric CoIn Stock: 1701BU-31104-2 Datasheet

DirectRFQ

6721-2

Pomona ElectronicsIn Stock: 15126721-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BU-31103-2 are qualified based on the following critical parameters that determine functional compatibility:

• Type: Banana Plug, Stackable
• Gender: Male
• Plug/Mating Plug Diameter: Standard Banana
• Mounting Type: Free Hanging (In-Line)
• Termination: Solder
• Color: Red
• Category: Banana and Tip Connectors

The substitute parts BU-31104-2 (Mueller Electric Co) and 6721-2 (Pomona Electronics) meet these core functional requirements. Both are active products with current manufacturing status, addressing the obsolescence of the original BU-31103-2.

Parameter Comparison

Engineering Selection Recommendations

BU-31104-2 is the primary substitute for the obsolete BU-31103-2, as it is manufactured by the same supplier (Mueller Electric Co) and maintains active product status. This part offers RoHS compliance, addressing regulatory requirements that the original part does not meet. The fully insulated design provides enhanced electrical safety compared to the sheathed insulation of the original.

6721-2 (Pomona Electronics) serves as an alternative substitute with active product status and specified operating temperature range (-10°C ~ 55°C). This part maintains sheathed insulation consistent with the original design. However, it does not provide RoHS compliance.

Selection between BU-31104-2 and 6721-2 depends on regulatory compliance requirements and insulation preference. For applications requiring RoHS compliance, BU-31104-2 is the appropriate choice. For applications with specific temperature operating requirements, 6721-2 provides documented thermal specifications.

Frequently Asked Questions (FAQ)

Q: Can BU-31104-2 directly replace BU-31103-2 in existing assemblies?

A: Yes. Both parts share identical functional parameters: stackable banana plug type, male gender, standard banana diameter, free-hanging mounting, solder termination, and red color. The primary differences are body material (Polypropylene vs. Polyamide), insulation type (Fully Insulated vs. Sheathed), and RoHS compliance status.

Q: What is the difference between sheathed and fully insulated banana plugs?

A: Sheathed insulation covers the connector body with a protective sleeve, while fully insulated design integrates insulation into the connector structure. Both provide electrical isolation; fully insulated designs typically offer enhanced safety and durability.

Q: Does wire gauge compatibility affect substitution?

A: Wire gauge specifications differ across the three parts. BU-31103-2 specifies 0.156" (4.0mm) diameter wire, BU-31104-2 accommodates 16-22 AWG, and 6721-2 is rated for 18 AWG. Verify wire gauge compatibility with your application requirements before selection.

Q: Is RoHS compliance required for my application?

A: RoHS compliance is mandatory for products sold in the European Union and many other regulated markets. BU-31104-2 is RoHS compliant; BU-31103-2 and 6721-2 are not. Confirm regulatory requirements for your end application.

Q: What packaging options are available?

A: BU-31104-2 and 6721-2 are supplied in bulk packaging. Verify packaging requirements with your procurement specifications.