FN376-4-21 Equivalent & Substitute Parts

Part Overview

The FN376-4-21 is a power entry connector receptacle module manufactured by Schaffner EMC Inc., designed for IEC 320-C14 panel mount applications. This component functions as a filtered AC power inlet with integrated EMI/RFI suppression for commercial applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and support ongoing system maintenance and new designs.

Substiute Parts

FN376-4-21

Schaffner EMC Inc.In Stock: 1096FN376-4-21 Datasheet

Current PartRFQ

FN378-4-21

Schaffner EMC Inc.In Stock: 1017FN378-4-21 Datasheet

DirectRFQ

864-10/011

QualtekIn Stock: 938864-10/011 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FN376-4-21 is determined by strict alignment with the following critical parameters:

• Connector Style & Type: Must be IEC 320-C14 receptacle with male blades in module configuration
• Electrical Performance: Filter type must be Filtered (EMI, RFI) - Commercial; current rating must support 4A minimum
• Mechanical Compatibility: Panel mount flange configuration with quick connect termination; panel thickness accommodation of 0.031" ~ 0.126"
• Regulatory Compliance: Approval by CSA, UL, and VDE; UL94 V-2 flammability rating; RoHS compliance required
• Functional Features: Fuse accommodation capability; voltage selector feature

Two substitute parts meet these criteria:

1. FN378-4-21 (Schaffner EMC Inc.) - Direct manufacturer alternative with active product status
2. 864-10/011 (Qualtek) - Cross-manufacturer equivalent with comparable electrical and mechanical specifications

Parameter Comparison

Engineering Selection Recommendations

FN378-4-21 is the primary substitute for FN376-4-21. Both components are manufactured by Schaffner EMC Inc. and share identical electrical specifications, mechanical dimensions, and regulatory certifications. The FN378-4-21 maintains active product status, ensuring long-term availability and supply chain stability. The only documented difference is the fuse holder configuration (Twin Fused in FN378-4-21 versus standard in FN376-4-21), which does not affect functional compatibility for applications requiring standard fuse accommodation. RoHS3 compliance of the FN378-4-21 exceeds the RoHS compliance of the obsolete FN376-4-21.

864-10/011 (Qualtek) serves as a cross-manufacturer equivalent when FN378-4-21 availability is constrained. This part maintains IEC 320-C14 receptacle configuration, filtered EMI/RFI commercial design, panel mount flange mounting, quick connect termination, and CSA/UL/VDE approval. The 864-10/011 provides specified appliance inlet ratings (4/6A at 250VAC) and includes an on-off switch feature. Panel cutout dimensions are specified as rectangular (28.96mm x 60.20mm). Material flammability rating and ingress protection specifications are not provided for the 864-10/011; verification against application requirements is necessary for critical thermal or environmental exposure conditions.

Frequently Asked Questions (FAQ)

Q: Can FN378-4-21 directly replace FN376-4-21 in existing designs?

A: Yes. Both parts share identical IEC 320-C14 connector style, receptacle male blades module configuration, 3-position design, 4A filtered EMI/RFI commercial rating, panel mount flange mounting, quick connect termination, and CSA/UL/VDE approvals. Panel thickness accommodation (0.031" ~ 0.126") is identical. The FN378-4-21 is the direct active equivalent.

Q: What is the difference between FN378-4-21 and 864-10/011?

A: FN378-4-21 is a direct manufacturer equivalent from Schaffner EMC Inc. with fully specified parameters matching FN376-4-21. The 864-10/011 is a cross-manufacturer alternative from Qualtek with the same connector style and filtering approach but includes an on-off switch feature and provides appliance inlet current/voltage ratings (4/6A at 250VAC). The 864-10/011 does not specify panel thickness accommodation, material flammability rating, or ingress protection rating.

Q: Are there packaging differences between the substitutes?

A: FN376-4-21 packaging is not specified. FN378-4-21 is supplied in Tray packaging with 980 pieces in stock. The 864-10/011 is supplied in Tray packaging with 880 pieces in stock. Packaging format does not affect functional compatibility.

Q: Do the substitutes maintain the same fuse accommodation capability?

A: Yes. Both FN378-4-21 and 864-10/011 accommodate a fuse (fuse not included). FN378-4-21 features a Twin Fused fuse holder drawer, while 864-10/011 features a standard fuse holder drawer. Both support the fuse accommodation requirement of the original FN376-4-21.

Q: What regulatory certifications apply to all three parts?

A: All three parts (FN376-4-21, FN378-4-21, and 864-10/011) hold CSA, UL, and VDE approvals. FN376-4-21 and FN378-4-21 specify UL94 V-2 material flammability rating. FN378-4-21 and 864-10/011 are ROHS3 compliant. All parts are REACH Unaffected and classified under ECCN EAR99.