Eaton Bussmann

Bussmann FNM-3-1/2 Time-Delay Midget Fuse 3.5A 250VAC

SKU: LL1-BSM-FNM-3-1/2*1

$6.12

Available

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Bussmann FNM-3-1/2 Time-Delay Midget Fuse 3.5A 250VAC

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Eaton Bussmann

Bussmann FNM-3-1/2 Time-Delay Midget Fuse 3.5A 250VAC

SKU: LL1-BSM-FNM-3-1/2*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-3-1/2
Manufacturer Catalog Number	FNM-3-1/2
Product Category	Time-Delay Midget Fuse
Fuse Series	FNM
Current Rating	3.5 A (3-1/2 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	100 AIC
Interrupting Rating at 125 VAC	10 kAIC
Fuse Body Construction	Melamine Tube
End Cap Material	Nickel-Plated Bronze
Color Code	Green (250 VAC Maximum)
UPC	051712520355
Compliance	UL Listed; CSA Certified; CE Marked; RoHS Compliant
Protection Type	Supplemental Overcurrent Protection

Key Features

3.5 A Current Rating

Provides supplemental overcurrent protection for appropriately specified electrical circuits requiring a 3.5 A time-delay fuse. The 3-1/2 designation represents three and one-half amperes.

250 VAC Voltage Rating

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

Dual-Element Time-Delay Design

Helps accommodate temporary inrush currents associated with control power transformers, motors and other inductive loads 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 midget fuse holders.

Voltage-Specific Interrupting Ratings

Features a 100 A interrupting rating at 250 VAC and a 10 kA interrupting rating at 125 VAC. The available fault current must not exceed the applicable interrupting capacity at the actual system voltage.

Industrial Supplemental Protection

Combines melamine tube construction, a dual-element time-delay design and nickel-plated bronze ferrule end caps for supplemental protection of compatible inductive circuits.

Applications

Industrial control power transformer circuits
125 VAC and 250 VAC inductive control circuits
Electrical circuits with temporary inrush currents
Supplemental protection of compatible motor circuits
Industrial electrical control panels
Power electronic equipment circuits
Electrical equipment maintenance and fuse replacement
Compatible 5AG midget fuse holders and fuse blocks

Purchase Information

We support online purchase of the Bussmann FNM-3-1/2 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-3-1/2?
It is a 3.5 A time-delay midget cartridge fuse from the Eaton Bussmann FNM series, designed for supplemental overcurrent protection.

Who manufactures FNM-3-1/2?
FNM-3-1/2 belongs to the Eaton Bussmann series. Its manufacturer catalog number is FNM-3-1/2.

What is the rated current?
The rated current is 3.5 amperes, equivalent to 3500 mA or three and one-half amperes.

What is the AC voltage rating?
The manufacturer specifies a maximum AC voltage rating of 250 VAC.

Is FNM-3-1/2 a fast-acting fuse?
No. It is a dual-element time-delay fuse intended to accommodate certain temporary inrush currents according to its published operating characteristics.

What is the interrupting rating at 250 VAC?
Eaton specifies a 100 A interrupting rating at 250 VAC for FNM-3-1/2.

What is the interrupting rating at 125 VAC?
Eaton 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 dimensions are 10.3 mm in diameter and 38.1 mm in length, corresponding to the 5AG midget cartridge fuse format.

Does FNM-3-1/2 have a blown-fuse indicator?
No. The standard FNM-3-1/2 is a non-indicating cartridge fuse.

What materials and terminals does it use?
The FNM series features melamine tube construction. FNM-3-1/2 uses nickel-plated bronze ferrule end caps for installation in compatible holders.

Can FNM-3-1/2 be used for branch-circuit protection?
The FNM series is intended for supplemental overcurrent protection. Branch-circuit applications require an appropriately classified protective device with a suitable interrupting rating.

What should be verified before ordering?
Confirm the exact FNM-3-1/2 model number, 3.5 A current rating, 250 VAC voltage rating, voltage-dependent interrupting capacity, time-delay characteristics, physical dimensions and fuse-holder compatibility.

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