Eaton Bussmann

Bussmann FNM-1-1/4 Time-Delay Midget Fuse 1.25A 250VAC

SKU: LL1-BSM-FNM1 1/4*1

$6.12

Available

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Bussmann FNM-1-1/4 Time-Delay Midget Fuse 1.25A 250VAC

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Eaton Bussmann

Bussmann FNM-1-1/4 Time-Delay Midget Fuse 1.25A 250VAC

SKU: LL1-BSM-FNM1 1/4*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-1-1/4
Product Category	Time-Delay Midget Fuse
Fuse Series	FNM
Current Rating	1.25 A (1-1/4 A)
AC Voltage Rating	250 VAC
Operating Characteristic	Time-Delay
Fuse Element	Dual Element
Fuse Format	Midget Cartridge Fuse
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	100 AIC
Interrupting Rating at 125 VAC	10 kAIC
End Cap Material	Nickel-Plated Bronze
UPC	051712520126
Compliance	CE Marked; RoHS Compliant
Protection Type	Supplemental Overcurrent Protection

Key Features

1.25 A Current Rating

Provides supplemental overcurrent protection for electrical circuits requiring a 1.25 A time-delay fuse rating.

250 VAC Voltage Rating

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

Dual-Element Time-Delay Design

Helps accommodate certain temporary inrush currents associated with transformers, inductive loads and compatible motor control circuits according to the published time-current characteristics.

Compact Midget Cartridge Format

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

Voltage-Specific Interrupting Ratings

Features a 100 A interrupting rating at 250 VAC and a 10 kA interrupting rating at 125 VAC. Fuse selection must account for the available fault current at the actual operating voltage.

Ferrule End Connections

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

Applications

Industrial control power transformer circuits
Inductive electrical control circuits
Circuits with temporary inrush currents
Supplemental protection of compatible motor control circuits
Industrial electrical control panels
General-purpose equipment protection
Electrical equipment maintenance and replacement
Compatible midget fuse holders and fuse blocks

Purchase Information

We support online purchase of the Bussmann FNM-1-1/4 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-1-1/4?
It is a 1.25 A time-delay midget fuse from the Eaton Bussmann FNM series, intended for supplemental overcurrent protection.

Who manufactures FNM-1-1/4?
FNM-1-1/4 is an Eaton Bussmann series fuse. The manufacturer catalog number is FNM-1-1/4.

What is the current rating?
The rated current is 1.25 A, equivalent to one and one-quarter amperes.

What is the AC voltage rating?
The specified AC voltage rating is 250 VAC.

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

What is the interrupting rating at 250 VAC?
The manufacturer specifies a 100 A interrupting rating at 250 VAC for FNM-1-1/4.

What is the interrupting rating at 125 VAC?
The manufacturer specifies a 10,000 A interrupting rating at 125 VAC. This higher rating must not be applied to circuits operating at 250 VAC.

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

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

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

Can FNM-1-1/4 be used for branch-circuit protection?
The FNM series is intended for supplemental overcurrent protection. Applications requiring branch-circuit protection must use an appropriately classified protection device.

What should be verified before ordering?
Confirm the exact FNM-1-1/4 model number, 1.25 A current rating, 250 VAC voltage rating, voltage-dependent interrupting capacity, time-delay characteristics, fuse dimensions and holder compatibility.

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