CrimpComponent folio · Distribution · Blue Sea Systems
5191
Single-fuse holder for MRBF terminal fuses (30–300 A, 10 kA AIC). Bolts directly onto a battery+ post so the protected conductor starts within the ABYC E-11 §11.10 limit (175 mm). For an MRBF mounted on the battery itself, prefer setting the battery's terminal fuse instead of dropping a separate holder.
Open in Crimp →Reference image unavailable
MRBF terminal fuse holder · 2 terminals
01 — Reference run
A sizing result with its assumptions attached.
Conductor120 mm²4/0 AWG
Fuse350 Apositive run
Voltage drop2.2%3 m one way
Design current300 A12 V system
The Crimp engine applies its ordinary continuous-load headroom, voltage-drop budget, terminal clamp, and standard fuse ladder. The 3 m one-way run is a stated reference, not a universal installation prescription.
02 — Catalog specification
The part the engine actually sees.
- Canvas footprint
- 60 × 40 px
Terminal map
| Terminal | Polarity | Direction | Rating |
|---|---|---|---|
| in | positive | input | 300 A |
| out | positive | output | 300 A |
03 — Supporting parts
What belongs around it.
- 6 m total of 120 mm² (4/0 AWG) marine cable
- Four 120 mm² cable lugs matched to the equipment studs
- 350 A fuse and holder on the positive run
- Heat-shrink, strain relief, and terminal boots sized to the cable
See what it changes in your system
With JavaScript enabled, describe your existing boat, van, or off-grid system here. The model supplies topology; Crimp's engine computes the attachment, resized runs, checks, and supporting basket.