Pomona Electronics 6857 Circular Connector Adapter - Equivalent & Substitute Parts

Part Overview

The Pomona Electronics 6857 is a circular connector adapter designed for 3-pin XLR male-to-male inline applications. This component functions as a gender changer and pin configuration converter in audio, video, and signal transmission systems. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and component sourcing in legacy installations.

Substiute Parts

6857

Pomona ElectronicsIn Stock: 7256857 Datasheet

Current PartRFQ

390X

Switchcraft Inc.In Stock: 948390X Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Pomona Electronics 6857 is determined by strict alignment of the following critical parameters:

• Connector type and shell size (XLR 3-pin)
• Pin configuration (Male-to-Male)
• Adapter orientation (3-pin to 3-pin)
• Mounting configuration (Free Hanging/In-Line)
• Housing material and finish (Zinc Die Cast, Nickel)
• Fastening mechanism compatibility (Push-Pull engagement)
• Regulatory compliance (ROHS3, REACH Unaffected)

The Switchcraft Inc. 390X meets all mandatory substitution criteria for the Pomona 6857. Both components share identical functional specifications for connector conversion, pin count, shell size, and mounting type. Compliance certifications align across both parts.

Parameter Comparison

Engineering Selection Recommendations

The Switchcraft Inc. 390X is a direct functional equivalent for the obsolete Pomona Electronics 6857. Both components satisfy identical electrical and mechanical interface requirements for 3-pin XLR male-to-male adapter applications.

Selection between these parts should be based on:

• Product availability: The Switchcraft 390X maintains active production status with 930 units in stock, compared to the Pomona 6857 obsolete status with limited legacy inventory (620 units).
• Regulatory compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and safety standards.
• Shielding specification: The Switchcraft 390X provides shielded construction, whereas the Pomona 6857 is unshielded. In applications requiring electromagnetic interference mitigation, the shielded variant offers enhanced performance.
• Fastening mechanism: The Pomona 6857 includes detent lock functionality in addition to push-pull engagement. The Switchcraft 390X provides push-pull fastening with locking mechanism features.

Frequently Asked Questions (FAQ)

Q: Can the Switchcraft 390X directly replace the Pomona 6857 in existing installations?

A: Yes. Both components share identical XLR 3-pin male-to-male connector specifications, mounting configuration, and housing materials. Physical and electrical compatibility is confirmed across all critical parameters.

Q: What is the difference between shielded and unshielded variants?

A: The Pomona 6857 is unshielded; the Switchcraft 390X is shielded. Shielding provides electromagnetic interference (EMI) rejection. Selection depends on application requirements and signal integrity specifications.

Q: Are there packaging differences between these parts?

A: The Pomona 6857 packaging specification is not provided. The Switchcraft 390X is supplied in bulk packaging. Verify packaging requirements for your procurement process.

Q: Do both parts meet current regulatory standards?

A: Yes. Both the Pomona 6857 and Switchcraft 390X are ROHS3 compliant and REACH unaffected, meeting current environmental and safety regulations.

Q: What is the difference in fastening mechanisms?

A: The Pomona 6857 features push-pull engagement with detent lock. The Switchcraft 390X features push-pull engagement with locking mechanism. Both provide secure connection retention.