Overview
The NBX-2301 is a 17-way fuse box for commercial-vehicle body and accessory protection. It is the right size when a program needs more than the NBX-955's 12 circuits and more than the NBX-981's 15 circuits, but does not warrant a full central distribution box like the NBX-957. The standard build uses ATO/ATC blade fuses with optional ISO mini-relay sockets in adjacent positions; the relay-vs-fuse mix is confirmed against the customer's circuit map at quotation.
Engineering details
- 17 ATO/ATC blade-fuse positions — fuse ratings selected per program (typical 5 A / 10 A / 15 A / 20 A / 25 A mix)
- Optional ISO mini-relay sockets adjacent to fuse positions — common configuration is 4-6 relays for body actuators (wipers, lamps, fans, horns)
- 9 – 32 VDC input range — tolerates 12 V and 24 V vehicle architectures without re-spec
- Working temperature −40 to +85 °C — cabin / under-dash placement, not chassis-near
- Cover-on-screws design — serviceable in the field without removing the box from the harness
- Connector pin-out, terminal P/N and harness colour code confirmed against the customer harness drawing at quotation
How to choose: NBX-955 / NBX-981 / NBX-2301 / NBX-957
The fuse-box lineup is organised by circuit count, not by feature. Pick the smallest box that fits your program's circuit map plus a small reserve margin:
| Model | Circuits | Best for |
|---|---|---|
| NBX-955 | 12-way | Light commercial & service-vehicle body harness |
| NBX-981 | 15-way | Mid-size truck body / cabin accessory protection |
| NBX-2301 | 17-way | Heavy truck & bus body programs with extra individually fused branches |
| NBX-957 | Multi-circuit central | Whole-vehicle body central distribution (fuses + relays + central feed) |
Beyond circuit count there is one more axis the table does not show — switching. All three cabin boxes share the same IP54 blade-fuse, serviceable-cover format for protected cabin or under-dash placement, but the NBX-955 is a pure fuse box, whereas the NBX-981 (15-way) and the NBX-2301 both accept optional ISO mini-relay sockets alongside the fuse positions, so they can double as a small combined fuse-and-relay panel without adding a separate relay box. Choose the NBX-2301 over the NBX-981 when the circuit map needs those extra individually fused branches or a few more relay positions; if dedicated switching dominates, pair any of them with the NBX-2404 relay box, and if the program needs a main feed with dense fusing and multi-relay switching consolidated in one enclosure, move up to the NBX-957 central PDB.
For the architectural decision between a fuse box, a relay box and a junction box, see the junction vs fuse vs relay box guide. For sizing rules and selection criteria, see the fuse box buyer guide.
Manufacturing & testing
Built under IATF 16949, with APQP project planning and a PPAP package available for OEM programs. End-of-line functional test on every unit before packaging; environmental validation and EMC pre-compliance screening in our in-house lab when the program requires it.
Related models & how to ask
Closely related models in the NBX fuse-box lineup are the NBX-955 (12-way) and NBX-981 (15-way). For programs that need full body central distribution, see the NBX-957 body central PDB. If the program instead needs an IP67-sealed chassis-mount alternative, see the IP67 waterproof PDB notes (NBX-971). For the full lineup, see the Power Distribution family. To request drawings, sample units or a quote against your harness, please use the contact page.
