Switchcraft 851 Barrel Connector - Equivalent & Substitute Parts

Part Overview

The Switchcraft 851 is a 2.46mm ID mono phone plug connector featuring solder eyelet termination and 2 conductors. This connector is designed for audio and signal applications requiring reliable mono connections with a compact form factor. The 851 series represents the standard MICRO-PLUG® configuration, with 948 units currently in stock as new original inventory.

Substitute parts become necessary when specific packaging requirements, feature enhancements, or inventory constraints necessitate alternative configurations while maintaining electrical and mechanical compatibility.

Substiute Parts

851

Switchcraft Inc.In Stock: 1038851 Datasheet

Current PartRFQ

851X

Switchcraft Inc.In Stock: 1625851X Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Switchcraft 851X qualifies as a direct substitute for the 851 based on the following critical parameters:

• Mating Diameter: Both parts maintain 2.46mm ID (0.097") compatibility
• Signal Configuration: Both are mono connectors
• Conductor Count: Both feature 2 conductors with 2 contacts
• Termination Method: Both use solder eyelet(s) termination
• Connector Type & Gender: Both are male phone plugs
• Mounting Configuration: Both are free hanging (in-line) designs
• Electrical Ratings: Both support 125VAC and 125 mA current
• Contact Material & Plating: Both use brass contacts with nickel plating

The primary distinction is the 851X incorporates thread lock features and is supplied in bulk packaging, whereas the 851 is supplied with standard packaging. Both are manufactured by Switchcraft Inc. and belong to the MICRO-PLUG® family.

Parameter Comparison

Engineering Selection Recommendations

Both the Switchcraft 851 and 851X are active product status components fully compliant with ROHS3 and REACH requirements. Selection between these parts should be based on application-specific requirements:

The 851X is suitable for applications requiring enhanced mechanical retention through thread lock features. The higher inventory level (1548 units) of the 851X provides supply chain advantages for high-volume production requirements. Both parts maintain identical electrical performance and mechanical compatibility at the 2.46mm mating interface.

The standard 851 configuration remains appropriate for applications where thread lock features are not required and standard packaging is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the Switchcraft 851X directly replace the 851 in existing designs?

A: Yes. Both connectors share identical mating diameter (2.46mm ID), signal configuration (mono), conductor count (2), termination method (solder eyelet), and electrical ratings (125VAC, 125 mA). The 851X adds thread lock features but maintains full mechanical and electrical compatibility.

Q: What is the primary functional difference between the 851 and 851X?

A: The 851X incorporates thread lock features for enhanced mechanical retention. Both parts are otherwise electrically and mechanically equivalent for mono phone plug applications.

Q: Are there packaging differences between these parts?

A: Yes. The 851 is supplied in standard packaging, while the 851X is supplied in bulk packaging. This distinction affects procurement and handling but does not impact connector performance or compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 851 and 851X are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the operating temperature range for these connectors?

A: Both the 851 and 851X operate within the range of -20°C to 65°C.

Q: Are these connectors shielded?

A: No. Both the 851 and 851X are unshielded connectors suitable for applications where electromagnetic shielding is not required.