Eaton Bussmann

Bussmann FNM-12 Time-Delay Midget Fuse 12A 250VAC

SKU: LL1-BSM-FNM-12*1

$6.12

Available

PRODUCT GALLERY 01 / 2

Bussmann FNM-12 Time-Delay Midget Fuse 12A 250VAC

✓ Product images for part identification

Eaton Bussmann

Bussmann FNM-12 Time-Delay Midget Fuse 12A 250VAC

SKU: LL1-BSM-FNM-12*1

PRODUCT PRICE USD

$6.12

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	FNM-12
Manufacturer Catalog Number	FNM-12
Product Category	Time-Delay Midget Fuse
Fuse Series	FNM
Current Rating	12 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	10 kAIC (10,000 A)
Interrupting Rating at 125 VAC	Not separately specified in Eaton Technical Data 2028 for the 12–30 A range
Fuse Body Construction	Melamine Tube
End Cap Material	Nickel-Plated Bronze
Color Code	Green (250 VAC Maximum)
UPC	051712521208
Agency Information	UL Listed, Std. 248-14; CSA Certified
Compliance	CE Marked; RoHS Compliant
Protection Type	Supplemental Overcurrent Protection

Key Features

12 A Current Rating

Provides supplemental overcurrent protection for appropriately specified industrial electrical circuits requiring a 12 A time-delay fuse rating.

250 VAC Voltage Rating

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

Dual-Element Time-Delay Protection

Helps accommodate temporary inrush currents associated with motors, control power transformers 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.

10 kA Interrupting Rating at 250 VAC

The FNM-12 is rated to interrupt up to 10,000 A at 250 VAC. This differs from lower-current FNM models, and the circuit's prospective fault current must remain within the fuse's applicable rating.

Industrial Supplemental Protection

Combines melamine tube construction, nickel-plated bronze ferrule end caps and time-delay operation for supplemental protection of compatible AC inductive circuits.

Applications

Industrial control power transformer circuits
AC inductive control circuits up to 250 VAC
Electrical circuits with temporary high inrush currents
Supplemental protection of compatible motor circuits
Industrial electrical control panels
General-purpose electrical equipment control circuits
Electrical equipment maintenance and fuse replacement
Compatible midget fuse holders and fuse blocks

Purchase Information

We support online purchase of the Bussmann FNM-12 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-12?
It is a 12 A time-delay midget cartridge fuse from the Eaton Bussmann FNM series, designed for supplemental overcurrent protection.

Who manufactures FNM-12?
FNM-12 belongs to the Eaton Bussmann series. Its manufacturer catalog number is FNM-12.

What is the rated current?
The rated current is 12 amperes.

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

Is FNM-12 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 10 kA interrupting rating at 250 VAC for FNM-12, equivalent to 10,000 amperes.

What is the interrupting rating at 125 VAC?
Eaton Technical Data 2028 does not list a separate 125 VAC interrupting rating for the FNM 12–30 A range. The published 250 VAC interrupting rating is 10 kA. Verify the applicable circuit protection requirements before installation.

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-12 have a blown-fuse indicator?
No. The standard FNM-12 is a non-indicating cartridge fuse.

What materials and terminals does it use?
The FNM series uses melamine tube construction, and FNM-12 features nickel-plated bronze ferrule end caps for compatible fuse holders.

Can FNM-12 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 protective device with a suitable interrupting rating.

What should be verified before ordering?
Confirm the exact FNM-12 model number, 12 A current rating, 250 VAC voltage rating, 10 kA interrupting rating at 250 VAC, time-delay characteristics, physical dimensions and fuse-holder compatibility. Refer to Eaton Bussmann Technical Data 2028 for application details.

Need help confirming a model?

Send us your part number and technical requirements.

Contact Our Team