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Littelfuse LFR250303C Class R Fuse Block, 250V 30A DIN Rail Mount
Model: LIT-LFR25030-3C
Littelfuse LFR250303C Class R Fuse Block, 250V 30A DIN Rail MountThe Littelfuse LFR250303C Class R Fuse Block provides dependable overcurrent protection for Class R fuses rated up to 30A at 250VAC...
Littelfuse
$83.81
Littelfuse LFR60030-3CID Class R Fuse Block, 600V 30A
The Littelfuse LFR60030-3CID is a Class R fuse block from the LFR Series, engineered for reliable overcurrent protection in industrial and commercial power distribution equipment. Rated 600V and 30A, this indicating fuse block supports both bolt-in and DIN rail mounting for flexible panel design. Reinforcing clips are standard on all Class R fuse blocks in the series, helping maintain secure, low-resistance electrical connections in demanding industrial environments where consistent contact and minimized heat rise are critical to long-term performance.
Key Features
- Voltage Rating: 600V construction supports use in higher-voltage industrial and commercial circuits.
- Ampere Rating: 30A rating for Class R fuse protection in panelboards and control equipment.
- Class R Fuse Compatibility: Designed specifically for Class R fuses, a widely specified current-limiting fuse class used across industrial power systems.
- Reinforced Clip Design: Reinforcing clips are standard on all Class R fuse blocks, maximizing electrical contact and minimizing heat rise at the connection point for dependable long-term operation.
- DIN Rail Releasable: One-hand release from DIN Rail, with a lock-open/lock-closed function, simplifies installation and fuse replacement for non-knife blade style fuses.
- Bolt-In / DIN Rail Mounting: Universal mounting holes make for easy replacement in new or existing panel layouts.
- Indicating Design: Indication is offered on this version, giving a visual signal when the fuse has opened, which is available on most 250V and 600V versions in the series.
Certifications & Compliance
- UL Listed (IZLT E14721)
- cUL Listed (IZLT7 E14721)
- CSA Certified (6225-01 007316)
- Interrupting capacity (ICP) tested at 250V and 600V per Littelfuse test documentation
Technical Specifications
- VAC (V): 600
- Ampere Rating (A): 30
- Indicating: Yes
Typical Applications
- Industrial and Commercial Power Distribution Panels
- Class R Fuse Protection for Motors and Feeder Circuits
- DIN Rail Mounted Control Panels
- Panelboard and Switchboard Installations
- Motor Control Centers
Why Littelfuse?
Littelfuse fuse blocks are built with reinforced clip contacts and DIN rail releasable designs that simplify installation and maintenance while maintaining secure, low-heat connections. Universal mounting holes make replacement straightforward across panel designs. With UL, cUL, and CSA certifications backing the LFR Series, the LFR60030-3CID delivers dependable, code-compliant Class R fuse protection for professional electrical installations.
Manufacturer Resources
Spec Sheet
Product Specs
- Product Type:
- Fuse Block
- Voltage Rating:
- 600V
- Amperage Rating:
- 30A
- Series:
- LFR Series
- Configuration:
- DIN Rail / Bolt-In Mount
- Listing:
- cULus
- Department:
- Electrical
- Product Group:
- Circuit Protection
- Product Subgroup:
- Fuse Holders & Blocks
Littelfuse LFR60030-3CID – Frequently Asked Questions
1) Will the Littelfuse LFR60030-3CID accept Class RK1 and RK5 fuses, or does it only take one of them?
The LFR60030-3CID is built for Class R fuses rated 600V, 30A, which covers both RK1 and RK5 fuses in that voltage and amp size. Class R blocks carry a rejection feature, so a Class H/K fuse without the matching rejection ring will not seat. It is a three-pole block, so it fuses all three phases of a 600V circuit.
2) Can this Class R fuse block mount on DIN rail, or does it have to be bolted into the panel?
Either way. The LFR60030-3CID has universal mounting holes for bolt-in panel mounting and also snaps onto DIN rail, with a one-hand release and a lock-open/lock-closed function so you can pull it off the rail to change non-knife-blade fuses.
3) Is this fuse block UL Listed for use in a commercial panelboard?
Yes. The LFR60030-3CID is cULus listed, with UL file IZLT E14721, cUL IZLT7 E14721, and CSA certification 6225-01 007316. That covers industrial and commercial power distribution panels, motor control centers, and switchboard work on both sides of the US/Canada border.
4) Why pick a Class R block over a Class CC fuse block for a control panel?
Class R and Class CC are different fuse classes and the blocks are not interchangeable. Class R at 600V 30A, like the LFR60030-3CID, is what you use for motor branch circuits and feeders where a current-limiting RK1 or RK5 is specified. For small control transformer and control circuit protection you want a Class CC block, such as the Bussmann CHCC2DIU two-pole modular Class CC block, which is finger-safe and also has an indicator. Match the block to the fuse class on the drawing, not the amp rating alone.
5) Can a Bussmann CHCC2DIU fuse block be used in place of the Littelfuse LFR60030-3CID?
No. The LFR60030-3CID is built to accept Class R fuses at 600V, 30A, while the Bussmann CHCC2DIU is a 2-pole Class CC modular fuse block. Class CC and Class R fuses have entirely different body dimensions and rejection features, so the fuse you are installing decides the block. Both do share an indicating feature that gives a visual signal when the fuse has opened, and the CHCC2DIU adds finger-safe construction. If the panel schedule calls for Class R, stay with the Littelfuse block.
6) For a solar array DC circuit, is the Littelfuse LFR60030-3CID the right fuse block?
No. The LFR60030-3CID is rated 600V AC for Class R fuses in industrial and commercial AC power distribution, motor and feeder circuits. For photovoltaic DC strings, the Bussmann CHPV2 series photovoltaic fuse block is the purpose-built choice, a modular two-pole block rated 1000 Vdc. Use the PV-specific block on the array side and keep the Class R block for the AC distribution equipment.
7) Can I use a 600V Class R fuse block on a 240V motor circuit?
Yes. A 600V rating is a maximum, so the LFR60030-3CID works on any system at or below 600V, including 480V and 240V motor and feeder circuits. The limit that matters is the 30A ampere rating, which is the largest Class R fuse the clips will take.
8) Will this replace an existing three-pole Class R block in an older panel without redrilling?
The LFR Series uses universal mounting holes specifically so a block drops into new or existing panel layouts, and the same part can be rail-mounted if the old block was bolted to a subpanel you would rather not touch. Confirm the block you are pulling is also 600V 30A Class R three-pole, since a 250V or a Class H block will not share the same fuse rejection or clip spacing.
9) I need a small inline block for control wiring, not a Class R block. What is the alternative to the LFR60030-3CID?
The LFR60030-3CID is sized for Class R fuses at 600V, 30A feeding motors, panelboards and switchboards, which is more block than a low-current control or signal circuit needs. For glass-tube AGC fuses, the Bussmann 3833 series AGC fuse block is available in 1 through 8-pole configurations, so you can order only the number of poles the control circuit uses. Note the AGC block will not accept a Class R fuse.
10) Is a two-pole modular fuse block like the Bussmann BCM603 interchangeable with the Littelfuse LFR60030-3CID?
They are not interchangeable. The Bussmann BCM603 is a two-pole modular fuse block, while the LFR60030-3CID is a three-pole Class R block rated 600V, 30A with an indicating feature and reinforcing clips, mounting either bolt-in or on DIN rail through universal mounting holes. On a three-phase feeder you need all three poles of Class R protection, which the Littelfuse block provides in one piece.
11) Do the reinforced clips matter, or is that just marketing?
They matter on a loaded feeder. Reinforcing clips are standard on every Class R block in the LFR Series; they hold higher contact pressure on the fuse ferrules, which keeps resistance and heat rise down at the connection. In a packed enclosure running near 30A continuously, clip pressure is what keeps the fuse from nuisance-opening from its own heat.
12) Our facility standardizes on cULus-listed components. Which of these fuse blocks meets that?
The Littelfuse LFR60030-3CID carries cULus listing and is also CSA certified, documented as UL Listed under IZLT E14721, cUL Listed under IZLT7 E14721, and CSA certified under 6225-01 007316. If you are standardizing a Class R platform across panels, the LFR Series blocks all include reinforcing clips and universal mounting holes, which keeps replacement consistent across both new and existing panel layouts.
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Does the Littelfuse LFR60030-3CID come with a warranty?
Absolutely. The Littelfuse LFR60030-3CID is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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