Overview
The NBX-954 is a passive central distribution box. It carries the same body and accessory circuits typically routed through the NBX-952 — lighting, wipers, horn, climate, fan and indicators — but does not include CAN communication or on-board switching logic. The box itself is a stable distribution platform: relays, fuses, flasher and an 8-connector harness interface in one sealed enclosure. Switch commands arrive through the harness from a separate body controller, which is the right architecture for programs that already specify a stand-alone BCM and only need this block to handle the power side.
Engineering details
- 12× ISO relay positions — 5× ISO-mini (typical 30/40 A loads) and 7× ISO-micro (typical 15 A loads), populated per program
- 26× ATO standard-blade fuse positions plus 5× reserved positions for late additions; fuse ratings specified per program against the customer circuit map
- 1× flasher position — configurable for turn-signal flasher or wiper-interval timer per program
- No on-board CAN or microcontroller — the box is purely passive: switch commands arrive on the harness, fuses protect branches, relays deliver loads
- 8-connector / ~106-pin harness interface — pin count by position: A 8P / B 8P / C 8P / D 35P / E 8P / F 8P / G 23P / H 8P. Current-production housings include TE/Tyco-AMP 770680-1 (23P), 776164-1 (35P) and C228 series 8P signal connectors; specific housing and terminal P/N confirmed against the customer harness drawing at quotation
- 9 – 32 VDC input — tolerates 12 V and 24 V vehicle architectures without re-spec
- IP65 sealed enclosure with UL94 V-0 flame retardancy and 10 – 500 Hz vibration durability — suitable for cabin, under-dash and protected engine-bay placement, with thermal and chemical exposure confirmed per program
- Mechanical envelope ~215 × 168 mm body (235 × 186 mm with mounting flanges); Ø8 mm fixing holes
Controlled body-circuit functions
The NBX-954 carries the same families of body and accessory branches, but the switching decision is not made inside the box — a separate BCM (or the cab switch panel) sends the command down the harness, and the NBX-954 fuses the branch and closes the relay. The standard wiring map covers the circuits below, each fused and relay-allocated per the customer drawing at quotation:
- Lighting — low / high beam, side & tail lamps, fog lamps, reversing lamps, daytime running
- Wiper & cleaning — front wiper feed with the flasher position wired as an interval timer
- Driver feedback — horn and turn-signal flasher branches
- Braking & safety — brake-circuit feed and brake-lamp drive
- Climate & cooling — HVAC blower and cooling-fan stages
There is no CAN port or microcontroller to specify or flash: if the program already runs a body controller that owns the logic, the NBX-954 keeps the power side simple. If you would rather the distribution box itself drive these circuits over CAN, specify the NBX-952 instead.
How it differs from NBX-952 and NBX-972
The three boxes sit on the same Power Distribution shelf but solve different problems. Pick the one that matches the program's level of control logic and circuit count:
| Model | Role | CAN logic | Fused circuits | Best for |
|---|---|---|---|---|
| NBX-954 | Passive central distribution | No (passive) | ~31 (26 ATO + 5 spare) | Programs with separate BCM, mid-density body wiring |
| NBX-952 | Centralized PDB + body control logic | Yes (program-specific) | ~30+ (mini-blade) | Programs that want one box for distribution and body-circuit logic |
| NBX-972 | High-density passive central PDB | No (passive) | ~65 (mini + J-case) | Heavy truck / construction with high circuit count & aftertreatment functions |
For the architectural decision between a junction box, a fuse box and a relay-fuse distribution box, see the junction vs fuse vs relay box 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 (relay actuation and fuse-circuit continuity) before packaging; environmental validation and EMC pre-compliance screening in our in-house lab when the program requires it.
Related models & how to ask
For the CAN-enabled version with on-board body-control logic, see the NBX-952 centralized body control & PDB. For the higher-density 65-circuit variant used on heavy trucks and construction machinery, see the NBX-972 65-circuit central PDB. For the general-purpose body-central PDB platform (IP54 standard, IP65 variant available), see the NBX-957 body central PDB. For an IP67-sealed waterproof variant for chassis-near applications, see the IP67 waterproof PDB notes. 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.
