250Vac/150Vdc 10-60A Classs R Time Delay RK5 Fuse

Can be applied in circuits subject to temporary motor overloads and surge currents to provide both high-performance short-circuit and overload protection

The overload element provides protection against low-level overcurrent of overloads, and will hold an overload which is five times greater than the amprating of the fuse for a minimum of 6~10 seconds

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SKU HCNR Category Tag

Description

Standards / Approvals

  • Refer To UL 248.1/UL 248.12
  • Reach Declaration Available Upon Request
  • CE
  • RoHS Compliant

Current-Limiting Effects of HCNR Fuses

SHORT CIRCUIT CURRENT* APPARENT RMS SYMMETRICAL CURRENT FOR VARIOUS FUSE RATINGS
30A 60A
5000 1400 2100
10000 1550 2500
15000 2000 3150
20000 2250 3400
25000 2400 3750
30000 2550 4100
35000 2650 4300
40000 2800 4400
50000 3000 5000
60000 3200 5250
80000 3400 5750
100000 3850 6000
150000 4100 7000
200000 4300 7500

Data Sheet Compared to Other Brands

Series Mfg Fuse Type Operating Speed Amps VAC VDC Primary Approval Description
HCNR Hiitio Class RK5 Time Delay 1-60A 250 150 UL Listed UL 248-12, Class RK5
FRN-R 1/10-60A Bussmann Class RK5 Time Delay .100A-60A 250 125 UL Listed UL 248-12, Class RK5
FRN-R 70-600A Bussmann Class RK5 Time Delay 70A-600A 250 125 UL Listed UL 248-12, Class RK5
FRS-R 1/10-60A Bussmann Class RK5 Time Delay .100A-60A 600 300 UL Listed UL 248-12, Class RK5
FRS-R 70-600A Bussmann Class RK5 Time Delay 70A-600A 600 300 UL Listed UL 248-12, Class RK5
FLNR Littelfuse Class RK5 Time Delay .100A-600A 250 125 UL Listed UL 248-12, Class RK5
FLNR_ID Littelfuse Class RK5 Time Delay .100A-600A 250 125 UL Listed UL 248-12, Class RK5
FLSR Littelfuse Class RK5 Time Delay .100A-600A 600 300 UL Listed UL 248-12, Class RK5
FLSR_ID Littelfuse Class RK5 Time Delay .125A-600A 600 300 UL Listed UL 248-12, Class RK5
IDSR Littelfuse Class RK5 Time Delay .100A-600A 600 600 UL Listed UL 248-12, Class RK5
TR-R Mersen Class RK5 Time Delay .100A-600A 250 250/160 UL Listed UL 248-12, Class RK5
TRS-R Mersen Class RK5 Time Delay .100A-600A 600 600/300 UL Listed UL 248-12, Class RK5
TRS-RDC Mersen Class RK5 Time Delay .100A-400A 300/600 MSHA MSHA No. 28-26-0

Applications

Instructions of Class RK5 Fuse​

Class RK5 Fuse is a current limiting device with a time delay feature. It is rated to interrupt a minimum of 200 Ka and is designed to protect electrical circuits from overloads and shorts.

The Class RK5 fuse features a dual-element construction and is rated at either 250-600 Vdc or 150-600 Vac. The ampere rating range is from 1/10 to 600 amps.

Unlike ordinary fuses, Class RK5 fuses use high melting point alloy materials that quickly melt and open the circuit upon detection of high temperatures. These materials also have low short-circuit resistance, which enables them to quickly cut off short-circuit currents and protect the circuit from damage.

When using a Class RK5 fuse, it is important to choose one that is appropriate for the circuit’s current and operating requirements. To ensure the fuse’s reliability and safety, it should be properly installed and used, and periodically maintained and inspected.

It is also important to note that Class RK5 fuses have a time delay feature, so they should not be used in circuits where the fuse will be energized for an extended period of time, as this can exceed the fuse’s melting time and potentially affect the circuit’s safety and reliability.

Applications of Class RK5 Fuses

  • Current limiting
  • Service entrance switches
  • Helps protect motors against burnout from overloads
  • Provides motor overload, ground fault and short-circuit protection
  • Switchboard mains and feeders
  • Helps protect motors against burnout from single phasing on three-phase systems
  • Motor control central mains and motor branch circuits
  • All general purpose circuits

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