Eaton Bussmann

Bussmann FNQ-4-1/2 Time-Delay Midget Fuse 4.5A 500VAC

SKU: LL1-BSM-FNQ-4-1/2*1

$6.98

Available

PRODUCT GALLERY 01 / 2

Bussmann FNQ-4-1/2 Time-Delay Midget Fuse 4.5A 500VAC

✓ Product images for part identification

Eaton Bussmann

Bussmann FNQ-4-1/2 Time-Delay Midget Fuse 4.5A 500VAC

SKU: LL1-BSM-FNQ-4-1/2*1

PRODUCT PRICE USD

$6.98

Available to order

Select Option Choose your purchase option

Quantity

Request a Quote

Need multiple units or help confirming a model? Contact our team.

↗ Free U.S. Shipping Standard delivery

↻ 30-Day Returns Subject to return policy

▤ Bulk Purchase Request volume quotes

✓ Secure Checkout Shopify-powered checkout

PRODUCT DOCUMENTATION

Product Information

Technical specifications, features, applications and purchasing information.

Technical Specifications

Brand	Bussmann (Eaton)
Model Number	FNQ-4-1/2
Manufacturer Catalog Number	FNQ-4-1/2
Product Category	Time-Delay Midget Fuse
Fuse Series	FNQ
Current Rating	4.5 A (4500 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 x Ferrule End
Fuse Indication	Non-Indicating
Interrupting Rating at 500 VAC	10 kAIC (10,000 A)
Fuse Body Construction	Fiber Tube (FNQ Series)
End Cap Material	Nickel-Plated Bronze (Eaton Product Specification)
Series End Cap Construction	Nickel-Plated Brass (FNQ Series Technical Data)
Series Color Code	Orange (500 VAC Maximum)
UPC	051712786287
EAN	5027590407663
UL Approval	UL Listed, UL 248-14, File E19180
CSA Approval	CSA Certified, Class 1422-01, File 53787
Compliance	CE Marked; RoHS Compliant
Protection Type	Supplemental Overcurrent Protection
Manufacturer Reference	Eaton Bussmann FNQ Technical Data 1012

Key Features

4.5 A Current Rating

Rated at 4.5 amperes, the FNQ-4-1/2 provides supplemental overcurrent protection for appropriately specified industrial electrical control circuits, transformers and compatible equipment.

500 VAC Voltage Rating

Designed for compatible AC electrical circuits operating at or below the published maximum voltage rating of 500 VAC. This supports specified industrial control applications, including appropriate 480 VAC transformer primary circuits.

Time-Delay Operation

The time-delay characteristic helps accommodate temporary inrush currents associated with motor control transformers and other compatible inductive loads. Fuse selection should follow the manufacturer's time-current curves.

10 kA Interrupting Rating

Features a published interrupting rating of 10,000 amperes at 500 VAC. The available short-circuit current at the installation must not exceed the applicable fuse interrupting capacity.

Compact Midget Cartridge Design

Uses a nominal 10.3 mm diameter and 38.1 mm length cylindrical cartridge design, suitable for installation in appropriately rated and dimensionally compatible midget fuse holders.

Non-Indicating Ferrule Construction

Features a non-indicating cartridge design and ferrule end connections. Eaton's FNQ-4-1/2 product specification identifies nickel-plated bronze end caps for compatible fuse clips and holders.

Applications

Motor control transformer primary supplemental protection
Compatible 480 VAC control transformer circuits
Industrial AC control circuits with temporary inrush currents
Electrical control panels and machinery control equipment
Compatible lighting circuit supplemental protection
Industrial meter and instrumentation circuits
Compatible midget fuse holders and fuse blocks
Industrial equipment maintenance and specified fuse replacement

Purchase Information

We support online purchase of the Bussmann FNQ-4-1/2 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 FNQ-4-1/2?
It is a 4.5 A, 500 VAC time-delay midget cartridge fuse from the Eaton Bussmann FNQ series, intended for supplemental overcurrent protection in compatible industrial circuits.

Who manufactures FNQ-4-1/2?
FNQ-4-1/2 belongs to the Eaton Bussmann fuse range. Its manufacturer catalog number is FNQ-4-1/2.

What is the rated current?
The rated current is 4.5 amperes, equivalent to 4500 milliamperes or four and one-half amperes.

What is the AC voltage rating?
The published maximum AC voltage rating is 500 VAC. The application circuit must remain within this rating.

Is FNQ-4-1/2 a fast-acting fuse?
No. It is a time-delay fuse designed for compatible circuits where temporary inrush currents may occur. Check the manufacturer's published time-current characteristics before selecting a fuse.

What is the interrupting rating at 500 VAC?
Eaton specifies an interrupting rating of 10 kA at 500 VAC for FNQ-4-1/2, equivalent to 10,000 amperes.

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-4-1/2 have a blown-fuse indicator?
No. FNQ-4-1/2 is a non-indicating cartridge fuse.

What materials and terminals does it use?
The FNQ series technical literature describes fiber tube construction and nickel-plated brass end caps. Eaton's individual FNQ-4-1/2 product specification identifies nickel-plated bronze end caps and ferrule end connections. Confirm the exact alloy with Eaton if required for your application.

Can FNQ-4-1/2 replace FNQ-R-4-1/2?
Do not assume the two models are interchangeable. FNQ-4-1/2 is a 500 VAC supplemental fuse, whereas FNQ-R-4-1/2 is a 600 VAC Class CC fuse with different protection classifications, interrupting ratings and installation requirements.

Can FNQ-4-1/2 be used for branch-circuit protection?
FNQ-4-1/2 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-4-1/2 model number, 4.5 A current rating, 500 VAC voltage rating, 10 kA interrupting rating, time-delay characteristics, cartridge dimensions and fuse-holder compatibility. Consult Eaton Bussmann FNQ Technical Data 1012 for application specifications.

Need help confirming a model?

Send us your part number and technical requirements.

Contact Our Team