FN321-3-05 Equivalent & Substitute Parts

Part Overview

The FN321-3-05 is a power entry connector receptacle manufactured by Schaffner EMC Inc., designed for IEC 320-C14 panel mount applications with integrated EMI/RFI filtering. This component features male blades, quick connect termination, and is rated for 3A filtered current in commercial applications. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and redesign applications.

Substiute Parts

FN321-3-05

Schaffner EMC Inc.In Stock: 1156FN321-3-05 Datasheet

Current PartRFQ

858-03/013

QualtekIn Stock: 987858-03/013 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN321-3-05 is determined by strict equivalence across the following critical parameters:

• Connector style and type (IEC 320-C14 receptacle with male blades)
• Filter configuration (EMI/RFI filtered, commercial grade)
• Current rating (3A filter rating)
• Mounting configuration (panel mount with flange)
• Termination method (quick connect)
• Panel cutout dimensions (within tolerance of 28.50mm x 21.50mm)
• Regulatory compliance (CSA, UL, VDE certifications)

The substitute part 858-03/013 from Qualtek meets these criteria with panel cutout dimensions of 28.45mm x 21.60mm, representing a negligible deviation suitable for standard panel mounting applications.

Parameter Comparison

Engineering Selection Recommendations

The 858-03/013 from Qualtek is a direct functional equivalent to the obsolete FN321-3-05. Both components share identical connector specifications, filter ratings, and mounting configurations. The 858-03/013 carries active product status with current inventory availability (889 pcs), whereas the FN321-3-05 is obsolete with limited stock (1049 pcs).

Regulatory compliance is maintained across both parts: CSA, UL, and VDE certifications are present on both components. The 858-03/013 achieves ROHS3 compliance, exceeding the RoHS Compliant status of the FN321-3-05. Panel cutout dimensions differ by 0.05mm and 0.10mm respectively, which falls within standard manufacturing tolerances for panel mounting applications.

Selection of the 858-03/013 is supported by product availability, active manufacturing status, and equivalent electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can the 858-03/013 be used as a direct replacement for the FN321-3-05 in existing designs?

A: Yes. Both components are IEC 320-C14 receptacles with identical connector types, 3-position configurations, 3A filter ratings, and panel mount flanges. Panel cutout dimensions are within standard manufacturing tolerances (0.05mm to 0.10mm variance).

Q: What is the significance of the panel cutout dimension differences?

A: The FN321-3-05 specifies 28.50mm x 21.50mm, while the 858-03/013 specifies 28.45mm x 21.60mm. These differences of 0.05mm and 0.10mm are within typical panel mounting tolerances and do not affect mechanical fit or electrical performance.

Q: Are both parts certified to the same regulatory standards?

A: Both components carry CSA, UL, and VDE certifications. The FN321-3-05 additionally lists SEMKO certification. Both achieve REACH Unaffected status and EAR99 export classification.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: ROHS3 represents the current iteration of RoHS compliance standards. The 858-03/013 meets the more recent ROHS3 specification, while the FN321-3-05 meets the earlier RoHS Compliant designation. Both satisfy RoHS requirements.

Q: Is the quick connect termination identical between both parts?

A: Both components feature quick connect termination. The FN321-3-05 specifies 0.250" (6.3mm) termination, while the 858-03/013 lists quick connect without dimensional specification. Standard IEC 320-C14 quick connect specifications are consistent across manufacturers.

Q: What inventory considerations should guide part selection?

A: The FN321-3-05 is obsolete with 1049 pcs in stock. The 858-03/013 is active with 889 pcs available. For new designs or long-term applications, the active 858-03/013 is recommended to ensure future availability and supply chain continuity.