FN385B-4 Equivalent & Substitute Parts

Part Overview

The FN385B-4 is a power entry connector receptacle manufactured by Schaffner EMC Inc., designed for IEC 320-C14 panel mount applications. This component functions as a filtered AC power inlet module with integrated EMI/RFI filtering for commercial and medical applications. The part carries a "Not For New Designs" status, making identification of equivalent alternatives essential for ongoing production and maintenance applications where this connector type remains in use.

Substiute Parts

FN385B-4-..

Schaffner EMC Inc.In Stock: 748FN385B-4-.. Datasheet

Current PartRFQ

DD22.4321.1111

SCHURTER Inc.In Stock: 1190DD22.4321.1111 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN385B-4 is determined by strict alignment of the following core parameters:

• Connector Style & Type: Both parts must conform to IEC 320-C14 standard with receptacle, male blades configuration
• Filtering Capability: Both must provide EMI/RFI filtering suitable for commercial and medical applications
• Filter Current Rating: Minimum 4A filter rating required
• Number of Positions: Must maintain 3-position configuration
• Fuse Accommodation: Both must support fuse integration
• Ingress Protection: IP40 rating must be maintained
• Regulatory Compliance: Parts must hold equivalent approval certifications (UL, CSA, VDE, or equivalent regional standards)
• RoHS Compliance: ROHS3 compliance required

The DD22.4321.1111 manufactured by SCHURTER Inc. meets these substitution criteria. While mounting methodology differs (flange with through-hole, right-angle versus snap-in), and termination style varies (quick connect versus solder eyelet), the core electrical and functional parameters align within acceptable substitution parameters for IEC 320-C14 filtered power entry applications.

Parameter Comparison

Engineering Selection Recommendations

The DD22.4321.1111 serves as a functional equivalent for the FN385B-4 based on core electrical and filtering parameters. Both components maintain IEC 320-C14 compliance, 4A filter current rating, and IP40 ingress protection with equivalent regulatory certifications (UL/CSA/VDE versus cULus/ENEC).

Selection of DD22.4321.1111 as a substitute requires evaluation of the following implementation factors:

• Mounting Integration: The transition from snap-in to flange-mounted, through-hole, right-angle configuration necessitates panel redesign and mechanical re-qualification
• Termination Compatibility: Replacement of solder eyelet termination with quick-connect 0.250" (6.3mm) terminals requires wiring harness modification
• Functional Enhancement: The integrated on-off switch in DD22.4321.1111 represents additional functionality not present in FN385B-4; system design must accommodate or isolate this feature
• Regulatory Alignment: Both components hold equivalent approvals for commercial and medical applications; no compliance gap exists
• Material Performance: DD22.4321.1111 exceeds flammability performance (UL94 V-0 versus V-2), providing enhanced safety margin

The DD22.4321.1111 is suitable for substitution in applications where mechanical redesign and termination modification are feasible and where the integrated switch functionality does not conflict with system requirements.

Frequently Asked Questions (FAQ)

Q: Can DD22.4321.1111 be used as a direct drop-in replacement for FN385B-4?

A: No. While both components meet core electrical and filtering specifications for IEC 320-C14 applications, the mounting methodology (snap-in versus flange-mounted through-hole) and termination style (solder eyelet versus quick-connect) differ. Panel and wiring modifications are required.

Q: Are the filtering characteristics identical between FN385B-4 and DD22.4321.1111?

A: Yes. Both components provide EMI/RFI filtering rated for 4A at commercial and medical application levels, with identical IP40 ingress protection and 3-position configuration.

Q: What is the significance of the integrated switch in DD22.4321.1111?

A: The DD22.4321.1111 includes an on-off switch feature not present in FN385B-4. System design must account for this additional functionality, either by utilizing it or ensuring it does not interfere with existing control logic.

Q: Do both parts meet the same regulatory standards?

A: Both components hold equivalent regional certifications. FN385B-4 carries CSA, UL, and VDE approvals, while DD22.4321.1111 holds cULus and ENEC certifications. Both are ROHS3 compliant and suitable for commercial and medical applications.

Q: What panel thickness does each connector support?

A: FN385B-4 accommodates panel thickness from 0.031" to 0.126" (0.79mm to 3.20mm). DD22.4321.1111 is specified for 0.118" (3.00mm) panel thickness, which falls within the FN385B-4 range.

Q: Is fuse accommodation available in both parts?

A: Yes. Both FN385B-4 and DD22.4321.1111 accommodate fuses (fuses not included). For DD22.4321.1111, the fuse drawer is sold separately.

Q: What is the current rating difference between the two parts?

A: FN385B-4 does not specify an appliance inlet current rating. DD22.4321.1111 specifies 10A appliance inlet current at 250VAC. Both maintain 4A filter current rating.