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A campsite at dusk with a dead phone and a fridge that stopped humming is a familiar off-grid moment, and sorting out mega fuse vs midi fuse is the step that decides which spare to carry. This comparison weighs BOJACK bolt-on fuses from both sides on what each listing states: amp figure, size, hole spacing, holder and pack size. The short verdict: match the fuse to the holder and the amp figure to the circuit, because the mega pair states wide hole spacing with a voltage figure, while the midi side brings a holder option and the highest amp figure here.
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Mega fuse vs midi fuse: side by side
| Mega Fuse vs Midi Fuse | BOJACK Midi 100A | BOJACK Mega 60A | BOJACK Midi 60A Holders | BOJACK Mega 40A | Amazon |
|---|---|---|---|---|---|
| Side | midi fuse | mega fuse | midi fuse | mega fuse | |
| Amp figure | 100A | 60A | 60A | 40A | |
| Voltage stated | Not stated | 32V DC | Not stated | 32V DC | |
| Items listed | 5 | 2 | 4 | 2 | |
| Hole spacing | Not stated | 50.8 mm | 30 mm | 50.8 mm | |
| Solar Score | 73 | 72 | 71 | 69 |
We copied each rating from the seller’s listing as the brand states it; data date 5 November 2026.
Amp figures and voltage
The amp figures set the two sides apart more than any other stated figure. The midi side holds the highest figure here: the BOJACK Midi 100A states 100A in a pack of 5. The mega side offers 60A and 40A, both in packs of 2, and the midi set with holders states 60A. On voltage, only the mega pair states a figure, 32V DC on both the 60A and the 40A listings, while the midi listings state no voltage figure, so the sides cannot be ranked on voltage.
Size and hole spacing
Size is where the mega pair is the clearest. Both mega listings state the same dimensions, 68.85 x 19.2 x 10 mm, the same hole spacing of 50.8 mm and the same hole diameter of 8.5 mm, so either mega fuse fits the same holder. The midi set with holders states a holder size of 51.7 x 27.5 x 25 mm with two holes spaced 30 mm apart, which is a different mount from the mega pair. The midi 100A listing states no dimensions at all, so its fit has to be checked against the holder it will sit in.
Holders, materials and spark protection
Only the midi set with holders includes a mount. Its holder is PA66, a small M5 bolt fuse holder, splashproof and fire retardant, with a stated current range of 30-200A up to 200A. The mega pair has no holder in the pack and instead states a copper alloy body with an integrated tin-plated heat sink and a riveted connection. Both sides state spark protection in their own words: the mega listings state a plastic insulator that prevents sparks when the fuse responds, and the midi listings state fusion resistance that prevents sparks, with the midi 100A adding a high-temperature resistant body and reinforced material on the holes.
What the listings leave unclear
The midi 100A listing states no voltage figure and no dimensions, so two of the figures buyers usually match are missing. The midi set with holders has a mismatch inside its own listing: the title says pack of 2 while the spec table lists 4 items. None of the 4 listings states a warranty term, and the midi 100A listing carries a warranty description that reads No. No listing here states a UL listing or any other certification by name.
The kits we chose
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 |  BOJACK Midi 100A | 9.7/10 | Buy on Amazon |
| 2 |  BOJACK Mega 60A | 9.6/10 | Buy on Amazon |
| 3 |  BOJACK Midi 60A Holders | 9.6/10 | Buy on Amazon |
| 4 | BOJACK Mega 40A | 9.6/10 | Buy on Amazon |
BOJACK Midi 100A
A 100A midi fuse in a pack of 5 with tin-plated zinc terminals, a high-temperature resistant body and reinforced holes, color-coded by amp figure.
Pros
- 100A figure, the highest amp figure in this group
- Pack of 5 keeps spares on hand
- Tin-plated zinc terminals, highly conductive per the listing
- Each fuse is color-coded and the amp figure is marked on top
Cons
- No voltage figure is stated
- No dimensions are stated
- No warranty term is stated
- Sold as fuses only, with no holder in the pack
Detailed Review
The listing states a 100A midi fuse in a pack of 5, with a high quality plastic insulating body that resists high temperature, tin-plated zinc terminals, reinforced material on the holes, and a different color for each amp figure with the figure marked on top. The listing states fusion resistance that prevents sparks when the fuse responds. It is a high current screw fuse for cars, trucks, construction vehicles, agricultural machinery, buses and caravans. The listing states no voltage figure and no dimensions, and the warranty description reads No.
Who it's for: owners who need a 100A fuse and want a pack of 5 spares with clear color coding. Who should skip it: anyone whose holder or circuit needs a stated voltage figure or a fuse with stated dimensions.
Its Solar Score of 9.7/10 comes from performance 32/35, build 21/25, value 22/25, safety 7/10 and warranty 0/5: 82 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Amp figure | 100A |
|---|---|
| Pack | Pack of 5 |
| Terminals | Tin-plated zinc |
| Color | Blue |
Figures as published on the retailer listing, collected 5 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. High-temperature resistant body with fusion resistance to prevent sparks, tin-plated zinc terminals stated, so safety scores 7 of 10. No warranty term, so warranty scores zero. See How We Pick.
Size and fuse it. Match wire gauge and fuses to the current the maker specifies, keep MC4 connectors matched to the same type, and keep connections dry and strain relieved.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
BOJACK Mega 60A
A 60A mega fuse in a pack of 2 with a copper alloy body, a tin-plated heat sink and a 32V DC figure.
Pros
- 60A with a stated 32V DC figure
- Copper alloy with an integrated tin-plated heat sink
- Riveted connection for a stable construction, per the listing
- Plastic insulator prevents sparks when the fuse responds
Cons
- No warranty term is stated
- Pack of 2 only
- Hole spacing of 50.8 mm needs a matching M8 holder
- No holder is included in the pack
Detailed Review
The listing states a 60A ANM bolt-on fuse for cars, trucks, agricultural machinery, construction vehicles, buses and caravans, with time delay characteristics, a 32V DC figure, dimensions of 68.85 x 19.2 x 10 mm, hole spacing of 50.8 mm and a hole diameter of 8.5 mm. The body is copper alloy with an integrated tin-plated heat sink, a riveted connection and a plastic insulator that prevents sparks when the fuse responds, and the listing states overload and short circuit protection.
Who it's for: owners with a mega fuse holder who need a 60A fuse with a stated voltage figure. Who should skip it: anyone whose holder takes midi fuses or a different amp figure.
Its Solar Score of 9.6/10 comes from performance 30/35, build 21/25, value 21/25, safety 8/10 and warranty 0/5: 80 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Amp figure | 60A |
|---|---|
| Voltage | 32V DC |
| Size | 68.85 x 19.2 x 10 mm |
| Hole spacing | 50.8 mm, 8.5 mm holes |
Figures as published on the retailer listing, collected 5 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Overload and short circuit protection with a plastic insulator that prevents sparks stated, so safety scores 8 of 10. No warranty term, so warranty scores zero. See How We Pick.
Size and fuse it. Match wire gauge and fuses to the current the maker specifies, keep MC4 connectors matched to the same type, and keep connections dry and strain relieved.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
BOJACK Midi 60A Holders
A 60A midi fuse set with holders, a PA66 holder body and tin-plated zinc terminals, with the holder rated 30-200A.
Pros
- Holders included in the set
- Holder rated 30-200A, up to 200A
- PA66 holder with splashproof and fire retardant properties stated
- Tin-plated zinc terminals, highly conductive per the listing
Cons
- No voltage figure is stated
- No warranty term is stated
- Midi fuse dimensions are not stated; only the holder size is given
Detailed Review
The listing states a 60A AMI/midi fuse with holders, a small M5 bolt fuse holder in PA66 at 51.7 x 27.5 x 25 mm with two holes spaced 30 mm apart, splashproof and fire retardant, and a holder current range of 30-200A up to 200A. The midi fuse has tin-plated zinc terminals and a high quality plastic insulator, and the listing states high-temperature resistance with fusion resistance to prevent sparks. The title says pack of 2 while the spec table lists 4 items, a mismatch to clear up before ordering.
Who it's for: owners who need a 60A midi fuse and a holder in the same set. Who should skip it: anyone who already has holders and wants fuses only.
Its Solar Score of 9.6/10 comes from performance 29/35, build 21/25, value 21/25, safety 8/10 and warranty 0/5: 79 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Amp figure | 60A |
|---|---|
| Holder size | 51.7 x 27.5 x 25 mm |
| Holder current | 30-200A, up to 200A |
| Hole spacing | 30 mm |
Figures as published on the retailer listing, collected 5 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Splashproof and fire retardant holder with circuit protection, fusion resistance to prevent sparks stated, so safety scores 8 of 10. No warranty term, so warranty scores zero. See How We Pick.
Size and fuse it. Match wire gauge and fuses to the current the maker specifies, keep MC4 connectors matched to the same type, and keep connections dry and strain relieved.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
BOJACK Mega 40A
A 40A mega fuse in a pack of 2 with the same copper alloy body, tin-plated heat sink and 32V DC figure as the 60A mega fuse.
Pros
- 40A with a stated 32V DC figure
- Copper alloy with an integrated tin-plated heat sink
- Riveted connection for a stable construction, per the listing
- Plastic insulator prevents sparks when the fuse responds
Cons
- Lowest amp figure in this group
- No warranty term is stated
- Pack of 2 only
- Hole spacing of 50.8 mm needs a matching M8 holder
Detailed Review
The listing states a 40A ANM bolt-on fuse for cars, trucks, agricultural machinery, construction vehicles, buses and caravans, with time delay characteristics, a 32V DC figure, dimensions of 68.85 x 19.2 x 10 mm, hole spacing of 50.8 mm and a hole diameter of 8.5 mm. The body is copper alloy with an integrated tin-plated heat sink, a riveted connection and a plastic insulator that prevents sparks when the fuse responds, and the listing states overload and short circuit protection.
Who it's for: owners with a mega fuse holder who need a 40A fuse with a stated voltage figure. Who should skip it: anyone whose circuit needs a higher amp figure or whose holder takes midi fuses.
Its Solar Score of 9.6/10 comes from performance 28/35, build 21/25, value 20/25, safety 8/10 and warranty 0/5: 77 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Amp figure | 40A |
|---|---|
| Voltage | 32V DC |
| Size | 68.85 x 19.2 x 10 mm |
| Hole spacing | 50.8 mm, 8.5 mm holes |
Figures as published on the retailer listing, collected 5 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Overload and short circuit protection with a plastic insulator that prevents sparks stated, so safety scores 8 of 10. No warranty term, so warranty scores zero. See How We Pick.
Size and fuse it. Match wire gauge and fuses to the current the maker specifies, keep MC4 connectors matched to the same type, and keep connections dry and strain relieved.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
Where the points went
The Solar Score weighs performance, build, value, safety and warranty. For fuses, safety means stated protection against overload and short circuits, plus an insulator or body that prevents sparks; all 4 listings state some form of it, so all 4 carry a safety score. None of the 4 listings states a warranty term, so the warranty line is empty across the group. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| BOJACK Midi 100A | 9.7 | 32 | 21 | 22 | 7 | 0 |
| BOJACK Mega 60A | 9.6 | 30 | 21 | 21 | 8 | 0 |
| BOJACK Midi 60A Holders | 9.6 | 29 | 21 | 21 | 8 | 0 |
| BOJACK Mega 40A | 9.6 | 28 | 21 | 20 | 8 | 0 |
We place weighted points on a scale whose ends are 9.2 and 9.8. Because the mapping is straight, a unit with more points never shows less.
How to choose the best mega fuse vs midi fuse
Start with the holder, then the amp figure, then the pack. If you are weighing other fuse shapes, see the ANL fuse vs MEGA fuse comparison.
Match the fuse to the holder
The mega pair states hole spacing of 50.8 mm and a hole diameter of 8.5 mm, while the midi set with holders states holes spaced 30 mm apart on an M5 bolt holder. A fuse that does not match the holder spacing cannot be bolted in, whatever its amp figure.
Match the amp figure to the circuit
The amp figures here run from 40A to 100A. The BOJACK Midi 100A is the only listing that states 100A, the mega pair covers 60A and 40A, and the midi set with holders states 60A. Pick the figure the circuit calls for, and do not fit a higher figure to cover a fault. For the cable side, see the best fuse for battery cable guide.
Decide whether you need holders
Only the midi set with holders includes a mount, in PA66 at 51.7 x 27.5 x 25 mm. If you already have holders, the fuse-only packs give spares: the midi 100A comes as a pack of 5 and the mega pair as packs of 2. For more on holders, see the inline fuse holder vs fuse block guide.
| If you need | Look at |
|---|---|
| Highest amp figure | BOJACK Midi 100A, 100A |
| A stated voltage figure | BOJACK Mega 60A or BOJACK Mega 40A, 32V DC |
| Holders in the set | BOJACK Midi 60A Holders |
| A pack of spares | BOJACK Midi 100A, pack of 5 |
Sizing Notes
- Match the amp figure to the circuit: 40A, 60A and 100A are the figures stated here.
- Match the hole spacing to the holder: 50.8 mm on the mega pair, 30 mm on the midi set with holders.
- Match the voltage figure where one is stated: the mega pair states 32V DC, and the midi listings state no voltage figure.
- Keep spares on hand: the midi 100A comes as a pack of 5, and the mega pair as packs of 2.
- Size the fuse to the cable and the load as the manual for the circuit gives.
FAQ: power away from the grid
Can a mega fuse fit in a midi fuse holder?
No, not on the figures stated here. The mega pair states hole spacing of 50.8 mm, while the midi set with holders states holes spaced 30 mm apart, so the two mounts differ.
Which fuse here has the highest amp figure?
The BOJACK Midi 100A at 100A. The next figures are 60A on the mega 60A and the midi set with holders, then 40A on the mega 40A.
Do any of these fuses state a voltage figure?
Only the mega pair, at 32V DC on both the 60A and the 40A listings. The midi listings state no voltage figure.
What pack sizes are offered?
The midi 100A comes as a pack of 5, the mega pair as packs of 2, and the midi set with holders lists 4 items while its title says pack of 2.
Do any of these fuses state a warranty?
No. None of the 4 listings states a warranty term, and the midi 100A listing carries a warranty description that reads No.
Related solar guides
See every Battery Monitors and Accessories guide and all Batteries and Charging guides. For the holder side, see the inline fuse holder vs fuse block guide, and for the cable side, the best fuse for battery cable guide. Also see our best dc fuse for solar system. Also see our ANL fuse vs MEGA fuse.
More picks: best dc fuse block for rv, best dc fuse block for camper, best rv battery fuse block, best inline fuse holder 12v.
