Technical Specifications

Key Features

Applications

• Small industrial control transformer protection
• Industrial control panels requiring Class CC fuses
• Compatible AC branch-circuit protection
• Industrial electrical line protection
• Control circuits with temporary transformer inrush currents
• Industrial machinery control equipment
• Compatible Class CC DIN-rail fuse holders and fuse blocks
• Exact-model industrial equipment fuse replacement

Purchase Information

We support online purchase of the Bussmann FNQ-R-12 Class CC Time-Delay 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-R-12?
It is a 12 A, 600 VAC Class CC current-limiting time-delay cartridge fuse from the Eaton Bussmann LIMITRON FNQ-R series, designed for compatible industrial control and branch-circuit applications.

Who manufactures FNQ-R-12?
FNQ-R-12 belongs to the Eaton Bussmann product range. Its manufacturer catalog number is FNQ-R-12.

What is the current rating?
The rated current is 12 amperes, equivalent to 12,000 milliamperes.

What is the AC voltage rating?
The published AC voltage rating is 600 VAC. The operating circuit voltage must remain within the fuse's applicable rating. Eaton FNQ-R Technical Data 1014 specifies a 300 VDC rating only for the 15 A and 20 A models, not FNQ-R-12.

Is FNQ-R-12 a time-delay fuse?
Yes. Eaton identifies FNQ-R-12 as a high-inrush time-delay fuse. Its product specification lists a response time of 12 seconds at 200% of rated current. Actual melting and clearing times depend on the applied current and operating conditions.

What is the interrupting rating?
Eaton specifies a 200 kA RMS symmetrical interrupting rating at 600 VAC, equivalent to 200,000 amperes.

What are the physical dimensions?
The nominal dimensions are 10.3 mm in diameter and 38.1 mm in length, approximately 0.41 inch by 1.50 inches.

Does FNQ-R-12 have a blown-fuse indicator?
No. Eaton identifies FNQ-R-12 as a non-indicating cartridge fuse without a built-in visual blown-fuse indicator.

What material and terminal configuration does FNQ-R-12 use?
Eaton specifies a melamine tube body and ferrule-to-ferrule connections. FNQ-R series documentation also describes nickel-plated brass end caps and dual-element current-limiting construction.

Can FNQ-R-12 replace FNQ-12?
Do not assume direct interchangeability. FNQ-R-12 is a 600 VAC Class CC branch-circuit fuse with a 200 kA interrupting rating, whereas the FNQ supplemental fuse series has different circuit protection classifications and application requirements. Verify the exact fuse designation, holder compatibility, voltage rating and time-current characteristics before replacement.

Is FNQ-R-12 RoHS compliant?
Yes. Eaton identifies FNQ-R-12 as RoHS compliant and CE marked. The FNQ-R Technical Data 1014 lists FNQ-R-1/4, not FNQ-R-12, as the exception to the series RoHS compliance statement.

What should be verified before ordering?
Confirm the exact FNQ-R-12 catalog number, 12 A current rating, 600 VAC voltage rating, 200 kA interrupting capacity, time-delay characteristics, Class CC fuse-holder compatibility and applicable circuit protection requirements. Refer to Eaton Bussmann FNQ-R Technical Data 1014 for detailed application guidance.