| Current Rating (Continuous) | 45A |
| Maximum AC Voltage | 250V |
| Maximum DC Voltage | 125V |
| Interrupting Rating | 300 kA AC; 20 kA DC |
| Opening | Slo-Blo / Time Lag (T) / Time Delay |
| Size | Industrial Cartridge |
| Family Style | Dual Element Fuse |
| Fuse Class | Class RK5 |
| Indicating | No |
Overview
FLNR045 is a Littelfuse Class RK5 dual-element, time-delay fuse with an ampere rating of 45 and cartridge-style construction.
Features
- Slo-Blo / Time Lag (T) / Time Delay opening characteristic
- Interrupting rating of 300 kA AC / 20 kA DC
- Rated up to 250V AC / 125V DC
- Industrial cartridge size, Class RK5
What's Included
- FLNR045 45 Amp Time-Delay Fuse (Pack Of 1)
Specifications
| Current Rating (Continuous) | 45A |
| Maximum AC Voltage | 250V |
| Maximum DC Voltage | 125V |
| Interrupting Rating | 300 kA AC; 20 kA DC |
| Opening | Slo-Blo / Time Lag (T) / Time Delay |
| Size | Industrial Cartridge |
| Family Style | Dual Element Fuse |
| Fuse Class | Class RK5 |
| Indicating | No |
Details
Overview
FLNR045 is a Littelfuse Class RK5 dual-element, time-delay fuse with an ampere rating of 45 and cartridge-style construction.
Features
- Slo-Blo / Time Lag (T) / Time Delay opening characteristic
- Interrupting rating of 300 kA AC / 20 kA DC
- Rated up to 250V AC / 125V DC
- Industrial cartridge size, Class RK5
What's Included
- FLNR045 45 Amp Time-Delay Fuse (Pack Of 1)
Manuals
Frequently Asked Questions
Who do you sell to?
We sell exclusively to licensed HVAC contractors and industry professionals. Professional installation by a licensed technician is recommended to ensure proper installation, system performance, code compliance, and maximum manufacturer warranty coverage.
What brands do you carry?
We specialize in high performance brands like Cooper and Hunter along with ductless and mini split systems that meet California low GWP and energy compliance standards. We also stock trusted installation and service brands including NAVAC, RectorSeal, Fieldpiece, Armbridge, Olmo, and Diversitech.
Do you stock equipment locally?
Yes. We have a ton of equipment and accessories in stock across the Bay Area and Sacramento, available for local pickup or freight shipping. More locations coming soon.
Can I get help sizing a system?
Absolutely. We help contractors with equipment selection, line set sizing, refrigerant matchups, and other technical questions. Reach out via phone or email for support.
Do you offer volume discounts?
Yes. We offer contractor pricing and volume breaks for bulk orders. Reach out directly if you're planning a multi-unit install or need project pricing.
Do you help with warranty claims?
Yes, you will need to first reach out to the Cooper & Hunter Technical Support line 1 800-977-0722 to go through troubleshooting, and if it is determined to be a defective unit, we will work with the manufacturer and you as the customer to source you a replacement unit under warranty. If it is determined to need replacement parts, you as the customers will work with Cooper & Hunter to source replacement parts.
Can I buy online?
Yes. As long as you have a licensed contractor account with us, you can place orders online for delivery or pickup at any of our branch locations.
What makes CoolMan different?
We’re not just a supplier — we’re a partner. We know the ductless business, we understand California codes, and we move fast to help you win jobs and keep clients happy.
