Eaton Bussmann

Bussmann FNM-1/4 Time-Delay Midget Fuse 250mA 250VAC

SKU: LL1-BSM-FNM1/4*1

$6.12

Available

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Bussmann FNM-1/4 Time-Delay Midget Fuse 250mA 250VAC

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Eaton Bussmann

Bussmann FNM-1/4 Time-Delay Midget Fuse 250mA 250VAC

SKU: LL1-BSM-FNM1/4*1

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$6.12

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PRODUCT DOCUMENTATION

Product Information

Technical specifications, features, applications and purchasing information.

Technical Specifications

Brand	Bussmann (Eaton)
Model Number	FNM-1/4
Product Category	Time-Delay Midget Fuse
Fuse Series	FNM
Current Rating	0.25 A (250 mA, 1/4 A)
AC Voltage Rating	250 VAC
Operating Characteristic	Time-Delay (Slow-Blow)
Number of Elements	Dual Element
Fuse Format	Midget Cartridge Fuse (5AG)
Nominal Dimensions	10.3 x 38.1 mm (13/32 x 1-1/2 in)
Termination Style	Ferrule End Caps
Fuse Indication	Non-Indicating
Interrupting Rating at 250 VAC	35 A
Interrupting Rating at 125 VAC	10 kA
Fuse Body Construction	Melamine Tube
End Cap Material	Nickel-Plated Bronze
Compliance	UL Listed (UL 248-14, File E19180); CSA Certified (File 53787); CE Marked; RoHS Compliant
Protection Type	Supplemental Overcurrent Protection

Key Features

250 mA Current Rating

Provides supplemental overcurrent protection for electrical circuits requiring a 0.25 A time-delay fuse rating.

250 VAC Voltage Rating

Designed for compatible AC control and equipment circuits operating within the published 250 VAC rating.

Dual-Element Time-Delay Design

Accommodates certain temporary inrush currents associated with inductive loads according to the published fuse time-current characteristics.

Compact Midget Cartridge Format

Uses a nominal 10.3 x 38.1 mm cylindrical fuse format for installation in appropriately rated and dimensionally compatible holders.

Voltage-Specific Interrupting Ratings

Rated for 35 A interrupting capacity at 250 VAC and 10 kA at 125 VAC. Circuit protection selection must account for the available fault current at the actual operating voltage.

Industrial Supplemental Protection

Combines time-delay characteristics, dual-element construction and ferrule terminals for compatible transformer, motor and inductive circuit applications.

Applications

Industrial control power transformer circuits
Low-current inductive load circuits
Circuits with temporary inrush currents
Supplemental motor control protection
Industrial electrical control panels
Power electronic equipment circuits
Electrical equipment maintenance and replacement
Compatible midget fuse holders and fuse blocks

Purchase Information

We support online purchase of the Bussmann FNM-1/4 Time-Delay Midget Fuse. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.

Frequently Asked Questions

What is the Bussmann FNM-1/4?
It is a 250 mA time-delay midget fuse in the Eaton Bussmann FNM series, intended for supplemental overcurrent protection.

Who manufactures the FNM-1/4?
The model belongs to the Eaton Bussmann series of electrical circuit protection products.

What is the current rating?
The rated current is 0.25 A, equivalent to 250 mA or one-quarter ampere.

What is its voltage rating?
The specified voltage rating is 250 VAC.

Is FNM-1/4 a fast-acting fuse?
No. It is a dual-element time-delay fuse designed to accommodate certain temporary inrush currents.

What is the interrupting rating at 250 VAC?
The published interrupting rating is 35 A at 250 VAC.

What is the interrupting rating at 125 VAC?
The published interrupting rating is 10,000 A at 125 VAC. This value must not be applied to a 250 VAC circuit.

What are the dimensions of FNM-1/4?
The nominal cylindrical fuse dimensions are 10.3 mm in diameter and 38.1 mm in length, corresponding to the midget cartridge format.

Does this fuse have a visual indicator?
No. The standard FNM-1/4 is a non-indicating fuse.

What type of connections does it use?
It uses ferrule-style terminals at both ends for installation in compatible fuse holders.

Can FNM-1/4 be used for branch-circuit protection?
The FNM series is intended for supplemental overcurrent protection. Branch-circuit applications require protection devices with the appropriate classification and interrupting capacity.

What should be verified before ordering?
Confirm the FNM-1/4 model number, 250 mA current rating, circuit voltage, voltage-specific interrupting rating, time-delay requirements, fuse dimensions and holder compatibility.

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