Eaton Bussmann

Bussmann FNM-1/2 Time-Delay Midget Fuse 500mA 250VAC

SKU: LL1-BSM-FNM1/2*1

$6.12

Available

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Bussmann FNM-1/2 Time-Delay Midget Fuse 500mA 250VAC

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Eaton Bussmann

Bussmann FNM-1/2 Time-Delay Midget Fuse 500mA 250VAC

SKU: LL1-BSM-FNM1/2*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-1/2
Product Category	Time-Delay Midget Fuse
Fuse Series	FNM
Current Rating	0.5 A (500 mA, 1/2 A)
AC Voltage Rating	250 VAC
Operating Characteristic	Time-Delay (Slow-Blow)
Fuse Element	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
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

500 mA Current Rating

Provides supplemental overcurrent protection for electrical circuits requiring a 0.5 A time-delay fuse rating.

250 VAC Voltage Rating

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

Dual-Element Time-Delay Design

Helps accommodate certain temporary inrush currents associated with inductive loads, motors and transformers according to the published fuse time-current characteristics.

Compact Midget Fuse Format

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

Voltage-Specific Interrupting Ratings

Provides an interrupting rating of 35 A at 250 VAC and 10 kA at 125 VAC. Fuse selection must account for available fault current at the actual operating voltage.

Ferrule End Connections

Nickel-plated bronze ferrule end caps provide electrical contact surfaces for compatible fuse holders and fuse blocks.

Applications

Industrial control power transformer circuits
Low-current inductive control circuits
Circuits with temporary inrush currents
Supplemental motor 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-1/2 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-1/2?
It is a 500 mA time-delay midget fuse from the Eaton Bussmann FNM series, designed for supplemental overcurrent protection.

Who manufactures FNM-1/2?
FNM-1/2 is part of the Eaton Bussmann series of electrical circuit protection products.

What is the current rating?
The rated current is 0.5 A, equivalent to 500 mA or one-half ampere.

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

Is FNM-1/2 a fast-acting fuse?
No. It is a dual-element time-delay fuse intended 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 higher interrupting value must not be applied to circuits operating at 250 VAC.

What are the fuse dimensions?
The nominal dimensions are 10.3 mm in diameter and 38.1 mm in length, corresponding to the 5AG midget cartridge fuse format.

Does FNM-1/2 have a visual indicator?
No. The standard FNM-1/2 is a non-indicating fuse.

What type of terminals does it use?
It uses nickel-plated bronze ferrule end caps for installation in compatible fuse holders.

Can FNM-1/2 be used for branch-circuit protection?
The FNM series is intended for supplemental overcurrent protection. Branch-circuit applications require a protection device with the appropriate classification and interrupting capacity.

What should be verified before ordering?
Confirm the FNM-1/2 model number, 500 mA current rating, 250 VAC voltage rating, voltage-specific interrupting capacity, time-delay requirements, physical dimensions and fuse-holder compatibility.

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