FNW-15 Equivalent & Substitute Parts Reference

Part Overview

The FNW-15 is a 15A 250VAC cartridge fuse manufactured by Eaton - Bussmann Electrical Division, classified as a slow-blow (5AG) fuse in a midget package format (10mm x 38mm). This component is designed for electrical and industrial applications requiring overcurrent protection in AC circuits rated at 250 volts. The FNW-15 is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for system maintenance, repair, and component sourcing.

Substiute Parts

FNW-15

Eaton - Bussmann Electrical DivisionIn Stock: 1108FNW-15 Datasheet

Current PartRFQ

FNM-15

Eaton - Bussmann Electrical DivisionIn Stock: 1170FNM-15 Datasheet

DirectRFQ

0FLM015.T

Littelfuse Inc.In Stock: 14210FLM015.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FNW-15 are qualified based on the following critical parameters that determine functional equivalence:

• Current Rating: 15A (exact match required)
• Voltage Rating (AC): 250 VAC (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5AG, 10mm x 38mm Midget (exact match required)
• Breaking Capacity: 10kA (exact match required)
• Fuse Type: Cartridge (exact match required)
• Mounting Type: Requires Holder (exact match required)

Two substitute parts meet these criteria: FNM-15 (Eaton - Bussmann Electrical Division) and 0FLM015.T (Littelfuse Inc.). Both are active products with identical electrical specifications and physical dimensions to the obsolete FNW-15.

Parameter Comparison

Engineering Selection Recommendations

FNM-15 is the primary substitute for the obsolete FNW-15. Both components are manufactured by Eaton - Bussmann Electrical Division and share identical electrical ratings, response characteristics, and physical dimensions. The FNM-15 is currently in active production status with higher inventory availability (1062 pcs vs. 1008 pcs for FNW-15). Both parts carry CE, CSA, and UL certifications, ensuring regulatory compliance across major markets. The FNM-15 is ROHS3 compliant, meeting current environmental standards.

0FLM015.T (Littelfuse Inc.) is a functionally equivalent alternative that meets all AC circuit requirements of the FNW-15. This part provides additional DC voltage capability (125 VDC) beyond the AC-only specification of the original component. The 0FLM015.T carries CSA, PSE, and UL certifications, with QPL approval for military applications. Physical dimensions are within tolerance of the FNW-15 (10.31mm x 38.10mm vs. 10.30mm x 38.00mm). This part is also ROHS3 compliant and REACH unaffected.

Selection between FNM-15 and 0FLM015.T depends on application requirements: FNM-15 for direct Eaton-Bussmann continuity, or 0FLM015.T for applications requiring dual AC/DC voltage capability or military-grade specifications.

Frequently Asked Questions (FAQ)

Q: Can FNM-15 directly replace FNW-15 in existing circuits? A: Yes. FNM-15 is electrically and mechanically equivalent to FNW-15. Both are 15A 250VAC slow-blow cartridge fuses in 5AG midget package format with 10kA breaking capacity. Physical dimensions are within tolerance (10.30mm x 38.10mm vs. 10.30mm x 38.00mm). Both require the same holder type.

Q: What is the difference between FNM-15 and 0FLM015.T? A: Both parts meet the FNW-15 specifications for AC circuits. The primary difference is that 0FLM015.T includes DC voltage rating (125 VDC) in addition to 250 VAC, while FNM-15 is AC-only. 0FLM015.T is manufactured by Littelfuse Inc. rather than Eaton - Bussmann. Both have identical current rating, response time, package format, and breaking capacity.

Q: Are all three parts physically interchangeable? A: Yes. All three parts (FNW-15, FNM-15, and 0FLM015.T) use the 5AG midget cartridge package (10mm x 38mm) and require the same holder. Dimensional variations (10.30mm to 10.31mm diameter, 38.00mm to 38.10mm length) are within standard tolerance for this package class and do not affect mechanical fit.

Q: Which certifications apply to each substitute? A: FNW-15 and FNM-15 both carry CE, CSA, and UL certifications. 0FLM015.T carries CSA, PSE, UL, and QPL certifications. All three parts are REACH unaffected and meet ECCN EAR99 classification.

Q: Is RoHS compliance a factor in selecting a substitute? A: FNM-15 and 0FLM015.T are both ROHS3 compliant. RoHS status is not specified for the obsolete FNW-15. If RoHS compliance is required for your application, both active substitutes meet this requirement.

Q: What is the inventory status of each part? A: FNW-15 (obsolete) has 1008 pcs in stock. FNM-15 (active) has 1062 pcs in stock. 0FLM015.T (active) has 1410 pcs in stock. For long-term sourcing, active products (FNM-15 and 0FLM015.T) are recommended.