Overview

The NBX‑965 is a passive sealed junction box. It is the choice when a harness has several branches that need to be joined at a single, serviceable point — without adding fuse or relay protection at that point. Two main harness inlets sit under a gasketed top cover; the cover lifts off for service, and the housing is IP54-rated for cabin and under-dash placement.

Engineering details

  • Two main harness inlets — configurable connector pin-out per program
  • Pure passive construction — no fuse holders, no relay sockets, no electronics
  • Gasketed top cover — serviceable in the field
  • Mounting flanges with through-holes for panel or bracket fixing
  • 9–32 VDC compatible — voltage rating set by the wiring inside, not by the box itself
  • Working temperature −40 to +85°C

Because the box is purely passive, the program-specific decisions live in the connector pin-out, terminal P/N and housing P/N — these are confirmed against the customer harness drawing at quotation. The NBX‑965 housing itself is one stable platform; what runs through it is set by the customer.

How it differs from a power distribution box

If the program needs fuse or relay protection at the same point, a junction box like NBX‑965 is the wrong choice — specify a fuse box (NBX‑955 / NBX‑981) or a central distribution box (NBX‑957) instead. For the architectural decision, see the junction vs fuse vs relay box guide.

Choosing the NBX‑965: sealed cover, open terminal block, or chassis enclosure

Once you have decided a junction point needs no fuse or relay, the remaining question is where it sits and how it is sealed. The NBX‑965 is the middle option: a gasketed top cover gives an IP54 grade and a serviceable lid, which suits cabin and under-dash positions where the join is protected from direct spray but still wants a cover over the terminals. Its two main inlets handle the common case of merging a couple of harness branches at one point.

If access matters more than sealing — for example a bracket-mounted join inside a cab, dashboard or control box that you expect to re-open during build or service — the open-style NBX‑966 junction terminal block drops the cover and instead exposes three labelled connector banks (A / B / C) for higher branch density; because it is open, it belongs inside that protected space rather than on the chassis rail. If the join moves outside the cab onto the chassis rail or into the weather, step up to the NBX‑968 sealed electrical box, whose IP65 enclosure can also house fuse modules, relay modules or terminal blocks when the same outdoor point needs protection devices, not just terminal joining.

Manufacturing & testing

Manufactured under IATF 16949 with PPAP support for OEM programs. Validation in our in-house lab.

Related models & how to ask

For terminal-block style harness consolidation without a sealed cover, see the NBX‑966 junction terminal block. For a chassis-mount sealed enclosure with sealed connectors and gland exits, see the NBX‑968 sealed electrical box. For a full overview of the family, see the Power Distribution family.