Fuses & Breakers
An RV runs two electrical systems, and both protect themselves with fuses and breakers — the 12-volt house side with blade and glass fuses, the 120-volt shore side with panel breakers. When something quits, a blown fuse is the first thing to check and usually the cheapest fix. What's here covers both sides: automotive blade fuses, glass AGC tube fuses, Maxi fuses, and Type-QP breakers for the main panel, plus the pullers to swap them without burning a finger.
40 products
Firman W03381 Portable Inverter Generator | 3650W Starting / 3300W Running, Gas, RV Ready
Cummins Onan 30 Amp Breaker Switch | Panel-Mount Replacement
Cummins/Onan A058U945 Generator Paralleling Kit | 30A Output, P2500i
Valterra Large Square Cable Entry Hatch | White, Accepts up to 50A
Blue Sea Systems ST Blade Fuse Block | 12-Circuit with Ground Bus & Cover, 100A
11-Position Fuse Block | Screw-Terminal 12V Distribution Block, 4.75" x 3" x 1.75"
Blue Sea Systems AGC 6-Circuit Fuse Block with Ground | 3.5" x 5.0"
Samlex 300A DC Fuse Assembly | Battery & Inverter Wiring Protection
Blue Sea Systems ST Blade Fuse Block | 6-Circuit, 100A, with Negative Bus & Cover
Siemens Q3015 Duplex Circuit Breaker | 30/15-Amp, 1-Pole, 120V, GFCI Protection
Siemens Q1515 Duplex Circuit Breaker | 15 Amp, 2-Pole, 120V
Siemens Q240 40-Amp Double Pole Circuit Breaker | Type QP, Black
AP Products Q250 Double-Pole Circuit Breaker | 50 Amp, 240V
Coleman-Mach Replacement Fuse Package | 2 Amp, 3-Pack
RV Designer Black Rocker Switch | 20A, 4-Terminal, DPDT, Momentary On/Off/Momentary On
RV Designer Contoured Double Wall Switch | White, 12V DC On/Off
Valterra Plug-In Digital AC Voltmeter | 80-300V Range, Carded
AP Products Q115 Circuit Breaker | 15-Amp, Single Pole, Type QP
RV Designer Push Button On/Off Switch | 10 Amp SPST, 8" Leads
RV Designer Black Rocker Switch | 10 Amp SPST On/Off
RV Designer Brown Rocker Switch with Gold Text | 10 Amp SPST On/Off
Bussmann ATC 40 Amp Blade Fuses | Orange, 5-Pack, 32V Auto/Marine/RV
Bussmann ATM Mini Blade Fuse | 20-Amp, Yellow, 5-Pack
Bussmann ATM Mini Fuse | 30 Amp, Fast-Acting
Bussmann FMX-30 Female Maxi-Fuse | 30 Amp, 32V
Bussmann FMX-40 MAXI Fuse | 40 Amp, Slow-Blow, Green
3-Way ATC/ATM Fuse Puller | Yellow Plastic, Clip-On Storage
Bussmann AGC-15 Glass Tube Fuse | 15 Amp, 250V
Bussmann AGC-20 Glass Tube Fuse | 20 Amp, 250V, 5-Pack
Bussmann AGC-2 Glass Tube Fuse | 2 Amp, 250V, 5-Pack
Bussmann AGC Glass Fuses | 5 Amp, 250V, 5-Pack
Bussmann ATC Blade Fuse | 15-Amp, Blue, 5-Pack
Bussmann ATC Blade Fuse | 20A, Yellow, 5-Pack
Bussmann ATC Blade Fuses | 10 Amp, Red, 5-Pack
Redarc FK100 Fuse Kit | 100A Rating, Through-Hole Mount
Bussmann AGC-3 Glass Tube Fuses | 3 Amp, 5-Pack
Southwire Electrical Maintenance Tool Kit | Multimeter, Pliers, Headlamp & More
Bussmann AGC 7.5-Amp Glass Auto Fuses | Pack of 5
Redarc 60A Fuse Kit | For BCDC DC-DC Charger Installations
Redarc CBK30-EB TowPro 30A Circuit Breaker Kit | Brake Controller Wiring
Matching a fuse or breaker to your RV
The golden rule is that a fuse protects the wire, not the device. Its amp rating should match the circuit it sits in — going bigger to stop nuisance blows just means the wire overheats before the fuse does, which is how electrical fires start. If a fuse keeps blowing, the fix is finding the short, not fitting a heavier fuse.
Sorting out which type you need comes down to a few things:
- Blade fuses (ATC/ATM/ATO). The plastic automotive fuses in your 12-volt distribution panel. ATC/ATO are standard size, ATM (mini) are smaller. Match the amp rating and the color — they're coded the same across brands.
- Glass tube fuses (AGC). Older circuits and some appliances use glass AGC fuses like the Bussmann ones here. Check the length as well as the rating; a same-amp fuse of the wrong length won't seat in the holder.
- Maxi fuses. High-current circuits — inverters, tow-vehicle charge lines — use the larger Maxi blade fuses in the 30-80 amp range.
- Panel breakers. Your 120-volt load center takes Type-QP breakers, and the Siemens and AP Products units here interchange. A GFCI breaker adds shock protection to a whole circuit, handy if an outlet near the sink or outside isn't already protected.
Keep a few spares of each amperage in the rig — a blown fuse always happens after the parts store closes. If a breaker itself is failing it's usually easier to swap than to chase, and the wire and connectors to do it cleanly are one category over.