Go Power FBL-200, FBL-300 & FBL-400 Class T Fuse Kit Guide

Go Power! FBL-200, FBL-300 and FBL-400 are complete Class T fuse-and-holder kits for the DC battery supply to a compatible RV inverter or inverter/charger. Each kit comes with its own amperage-rated Class T fuse, an insulated block, a transparent cover and mounting hardware. For an existing holder, a replacement fuse is a separate part. Compare the exact kit and fuse numbers below before choosing protection for your inverter.

Where Class T fuse protection sits in the DC system

Protected positive cable

Battery positive (+)12V, 24V, 32V or 48V system as approved for the inverter
Go Power FBL Class T fuse kitSelect the fuse amperage required for the actual battery, cable and inverter installation
Inverter DC positive (+)Feeds the connected inverter or inverter/charger

Separate negative return

Inverter DC negative (−)Separate DC return cable; not routed through the positive fuse
Required shunt or DC return hardwareOnly where specified by the actual system's manufacturer
Battery negative (−)Keep connections consistent with the inverter and battery manuals
Original functional illustration, not a terminal map, wiring schematic, fuse-size recommendation or installation plan. Follow the inverter and battery manufacturers' protection and conductor requirements.

FBL-200 versus FBL-300 versus FBL-400

FBL-200 · 44226200A Class T kit
Supplied with F-200 fuse
FBL-300 · 44227300A Class T kit
Supplied with F-300 fuse
FBL-400 · 43979400A Class T kit
Supplied with F-400 fuse
Go Power model Supplier part Included protection Separate replacement fuse
FBL-200 44226 200A Class T, block and cover F-200 (44365)
FBL-300 44227 300A Class T, block and cover F-300 (44366)
FBL-400 43979 400A Class T, block and cover F-400 model; confirm separately for availability

Go Power lists one block size across these FBL ratings, a #6 to 4/0 AWG cable accommodation range and 5/16-inch mounting studs. The factory also lists compatibility with appropriately designed 12V, 24V, 32V and 48V battery systems. The kit supplies the fuse holder, fuse, cover and mounting hardware; battery cables are not included.

Do not select a fuse by inverter wattage alone. The correct Class T rating depends on the inverter's actual DC input specification, battery system and installed conductor protection. A holder that accepts multiple fuse ratings does not make them electrically interchangeable.

Exact-number Class T fuse kits and replacement fuses

These are NewRVParts listings for the three complete kits and two separately offered replacement fuse ratings. Open the exact part for current pricing and supplier-warehouse availability.

Go Power FBL-200 200A Class T fuse block kit listed product image
FBL-200 — 200A Class T fuse block kitIncludes a 200A F-200 Class T fuse, block base, clear cover and mounting hardware.View exact part and availability
Go Power FBL-300 300A Class T fuse block kit listed product image
FBL-300 — 300A Class T fuse block kitIncludes a 300A F-300 Class T fuse, block base, clear cover and mounting hardware.View exact part and availability
Go Power FBL-400 400A Class T fuse block kit listed product image
FBL-400 — 400A Class T fuse block kitIncludes a 400A F-400 Class T fuse, block base, clear cover and mounting hardware.View exact part and availability
Go Power F-200 200A Class T replacement fuse listed product image
F-200 — 200A Class T replacement fuseFuse only, not the holder; replacement rating for an appropriately specified 200A circuit.View exact part and availability
Go Power F-300 300A Class T replacement fuse listed product image
F-300 — 300A Class T replacement fuseFuse only, not the block; match the exact 300A protection requirement.View exact part and availability

Go Power installation and selection reference

The Go Power inverter fuse-and-block documentation lists the FBL kit configurations, Class T replacement fuse models, stud sizes and supported DC battery-system voltages. Refer to the inverter's installation manual for the required fuse location and cable size, rather than relying on a general parts guide.

Electrical safety: Battery-bank circuits can deliver dangerous fault current. Disconnect and isolate all DC and charging sources before service. Have fuse location, interrupt rating, conductor protection and connections confirmed by a qualified RV electrical technician.

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