Eaton Bussmann

Bussmann FNQ-1/4 Time-Delay Midget Fuse 250mA 500VAC

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

$6.98

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Bussmann FNQ-1/4 Time-Delay Midget Fuse 250mA 500VAC

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Eaton Bussmann

Bussmann FNQ-1/4 Time-Delay Midget Fuse 250mA 500VAC

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

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$6.98

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PRODUCT DOCUMENTATION

Product Information

Technical specifications, features, applications and purchasing information.

Technical Specifications

Brand	Bussmann (Eaton)
Model Number	FNQ-1/4
Manufacturer Catalog Number	FNQ-1/4
Product Category	Time-Delay Midget Fuse
Fuse Series	FNQ
Current Rating	0.25 A (250 mA)
AC Voltage Rating	500 VAC
Operating Characteristic	Time-Delay (Slow-Blow)
Fuse Format	Midget Cartridge Fuse (5AG)
Nominal Dimensions	10.3 x 38.1 mm (13/32 x 1-1/2 in)
Mounting Type	Requires Compatible Fuse Holder
Termination Style	Ferrule End Caps
Fuse Indication	Non-Indicating
Interrupting Rating at 500 VAC	10 kAIC (10,000 A)
Fuse Body Construction	Fiber Tube
End Cap Construction	Nickel-Plated Brass
Series Color Code	Orange (500 VAC Maximum)
UPC	051712786010
UL Approval	UL Listed, UL 248-14, File E19180
CSA Approval	CSA Certified, C22.2 No. 248.14, File 53787
Compliance	CE; RoHS Compliant
Protection Type	Supplemental Overcurrent Protection
Manufacturer Reference	Eaton Bussmann FNQ Technical Data 1012

Key Features

250 mA Current Rating

Rated at 0.25 A (250 mA), the FNQ-1/4 provides supplemental overcurrent protection for appropriately specified low-current industrial electrical circuits.

500 VAC Voltage Rating

Designed for compatible AC control and equipment circuits operating at or below the published 500 VAC maximum voltage rating. The FNQ series is color coded orange for its voltage class.

Time-Delay Operation

Helps accommodate temporary inrush currents associated with motor control transformers and other compatible inductive circuits, subject to the manufacturer's published time-current characteristics.

10 kA Interrupting Rating

Provides a published interrupting capacity of 10,000 A at 500 VAC. The available fault current at the installation must be within the applicable interrupting rating.

Compact Midget Fuse Design

Features nominal dimensions of 10.3 mm in diameter and 38.1 mm in length for use in appropriately rated and dimensionally compatible midget fuse holders.

Fiber Tube Construction

Uses fiber tube construction and nickel-plated brass ferrule end caps as described in Eaton Bussmann FNQ Technical Data 1012.

Applications

Motor control transformer supplemental protection
Industrial AC control circuits with temporary inrush currents
Compatible low-current transformer primary circuits
Industrial electrical control panels
Electrical equipment requiring a 250 mA time-delay fuse
Industrial automation control circuit maintenance
Compatible DIN-rail midget fuse holders and blocks
Equipment servicing and specified fuse replacement

Purchase Information

We support online purchase of the Bussmann FNQ-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 FNQ-1/4?
It is a 250 mA, 500 VAC time-delay midget cartridge fuse from the Eaton Bussmann FNQ series, intended for supplemental overcurrent protection.

Who manufactures FNQ-1/4?
FNQ-1/4 is part of the Eaton Bussmann fuse range. Its manufacturer catalog number is FNQ-1/4.

What is the rated current?
The rated current is 0.25 amperes, equivalent to 250 milliamperes or one-quarter of an ampere.

What is the AC voltage rating?
The maximum published AC voltage rating is 500 VAC. The orange FNQ series color code identifies this voltage class.

Is FNQ-1/4 a fast-acting fuse?
No. FNQ-1/4 is a time-delay fuse intended for circuits where temporary inrush currents may occur. Its suitability should be evaluated using the manufacturer's time-current characteristics.

What is the interrupting rating at 500 VAC?
Eaton Bussmann Technical Data 1012 specifies a 10 kA interrupting rating at 500 VAC for the FNQ series, including FNQ-1/4.

What are the physical dimensions?
The nominal dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 13/32 inch by 1-1/2 inches.

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

What materials are used in this fuse?
Eaton FNQ Technical Data 1012 specifies fiber tube construction and nickel-plated brass end caps.

Can FNQ-1/4 replace an FNQ-R-1/4 fuse?
Do not assume these models are interchangeable. FNQ is a supplemental fuse series, whereas FNQ-R is a Class CC fuse series. Their protection classifications, interrupting ratings and installation requirements differ.

Can FNQ-1/4 be used for branch-circuit protection?
FNQ-1/4 is intended for supplemental overcurrent protection. Applications requiring branch-circuit protection must use an appropriately classified protective device with a suitable interrupting rating.

What should be verified before ordering?
Confirm the exact FNQ-1/4 model number, 250 mA current rating, 500 VAC voltage rating, 10 kA interrupting capacity, time-delay characteristics, dimensions and fuse-holder compatibility. Consult Eaton Bussmann Technical Data 1012 for series specifications.

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