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Eaton Bussmann

Bussmann FNQ-R-3 Class CC Time-Delay Fuse 3A 600VAC

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PRODUCT DOCUMENTATION

Product Information

Technical specifications, features, applications and purchasing information.

Technical Specifications

Brand	Bussmann (Eaton)
Model Number	FNQ-R-3
Product Category	Class CC Time-Delay Fuse
Product Series	LIMITRON FNQ-R
Current Rating	3 A
AC Voltage Rating	600 VAC
DC Voltage Rating	No DC Rating Specified for FNQ-R-3 in Eaton Technical Data 1014
Fuse Class	Class CC
Operating Characteristic	Time-Delay (Slow-Blow)
Fuse Type	Current-Limiting High-Inrush Time-Delay Fuse
Fuse Element	Dual-Element
Interrupting Rating at 600 VAC	200 kA RMS Symmetrical (200,000 A)
Response Time	12 Seconds at 200% of Rated Current (Eaton Product Specification)
Fuse Format	Class CC Cartridge Fuse
Nominal Dimensions	10.3 x 38.1 mm (0.41 x 1.50 in)

Key Features

3 A Current Rating

Rated at 3 amperes, the Bussmann FNQ-R-3 provides Class CC overcurrent protection for appropriately specified industrial control circuits, small control transformers and compatible electrical equipment.

600 VAC Voltage Rating

Designed for compatible AC electrical circuits operating at or below 600 VAC, supporting industrial control and branch-circuit applications that require Class CC fuse protection.

High-Inrush Time-Delay Performance

The time-delay characteristic helps accommodate temporary magnetizing inrush currents associated with small control transformers. Eaton specifies a response time of 12 seconds at 200% of rated current. Fuse selection should consider the complete time-current curves and application conditions.

200 kA Interrupting Capacity

Provides a manufacturer-specified interrupting rating of 200,000 amperes RMS symmetrical at 600 VAC for appropriately engineered electrical circuits with evaluated available short-circuit current.

Current-Limiting Class CC Design

Combines current-limiting performance with Class CC branch-circuit protection. The rejection-style design is compatible with appropriately selected Class CC fuse holders and helps prevent installation of lower-rated supplemental fuses in rejection-type holders.

Compact Melamine Cartridge

Features a melamine tube body, dual-element construction, non-indicating operation and ferrule end connections. Its nominal 10.3 x 38.1 mm cartridge dimensions support installation in compatible Class CC fuse blocks and holders.

Applications

Small industrial control transformer protection
Industrial control panels requiring Class CC fuses
Compatible 600 VAC AC branch circuits
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-3 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-3?
It is a 3 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 protection applications.

Who manufactures FNQ-R-3?
FNQ-R-3 belongs to the Eaton Bussmann product range. Its manufacturer catalog number is FNQ-R-3.

What is the current rating?
The rated current is 3 amperes, equivalent to 3000 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 Technical Data 1014 does not specify a DC rating for FNQ-R-3.

Is FNQ-R-3 a time-delay fuse?
Yes. It is a high-inrush time-delay fuse intended for compatible control transformer and industrial control applications. Eaton lists a response time of 12 seconds at 200% of rated current; actual opening behavior depends on the applicable time-current characteristics.

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-3 have a blown-fuse indicator?
No. Eaton identifies FNQ-R-3 as a non-indicating cartridge fuse without a built-in visual blown-fuse indicator.

What material and terminal configuration does FNQ-R-3 use?
Eaton specifies a melamine tube body and ferrule-to-ferrule connections. The fuse incorporates a dual-element, current-limiting Class CC rejection-style design.

Can FNQ-R-3 replace FNQ-3?
Do not assume direct interchangeability. FNQ-R-3 is a 600 VAC Class CC branch-circuit fuse with a 200 kA interrupting rating, whereas FNQ-3 belongs to the 500 VAC supplemental fuse series. Their circuit protection classifications, rejection features and fuse-holder requirements differ.

Is FNQ-R-3 RoHS compliant?
Yes. Eaton identifies FNQ-R-3 as RoHS compliant and CE marked. The FNQ-R Technical Data 1014 lists FNQ-R-1/4 as the exception to the series RoHS statement, not FNQ-R-3.

What should be verified before ordering?
Confirm the exact FNQ-R-3 catalog number, 3 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.

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