Overview
The NBX-952 is a CAN-enabled centralized body control and power distribution box. It is the right specification when a program needs more than a passive central PDB (relay + fuse only) but does not justify a fully separate body control module. A single sealed enclosure carries the relays, fuses, flasher and CAN-driven control logic that traditionally lived across two or three boxes plus an inter-box harness. The standard build is configured for commercial-vehicle body and accessory circuits — lighting, wipers, horn, climate, fan and indicators — with the relay-vs-fuse mix confirmed against the customer circuit map at quotation.
Engineering details
- 12× ISO relay positions — 2× ISO-mini (typical 30/40 A loads) and 10× ISO-micro (typical 15 A loads), populated per program
- 30+ blade-fuse positions — 2× J-case main-feed fuses plus 28 mini-blade fuses (APM/APS-style) and 7 reserved positions for late additions; fuse ratings specified per program
- 1× flasher position — configurable for turn-signal flasher or wiper-interval timer per program
- CAN bus communication — protocol confirmed per program (J1939 family commonly used on commercial-vehicle networks); the internal logic can be re-flashed against the customer wiring diagram
- 7-connector / ~92-pin harness interface — pin count by position: A 2P / B 8P / C 8P / D 23P / E 8P / F 8P / G 35P. Current-production housings include TE/Tyco-AMP 770680-1 (23P), 776164-1 (35P), C228 series 8P signal connectors and a 2P main-power housing; 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
Controlled body-circuit functions
On the NBX-952 the on-board logic does the switching itself — the controller reads CAN messages (plus a few hard-wired inputs) and decides when each branch energises, so the cab harness no longer needs a discrete switch wire per function. The standard map covers the commercial-vehicle body and accessory circuits below, each re-mappable at quotation against the customer wiring diagram:
- Lighting — low / high beam, side & tail lamps, fog lamps, reversing lamps, daytime running, switched from CAN commands rather than individual dash switches
- Wiper & cleaning — front wiper drive sequenced by the on-board flasher / interval timer
- Driver feedback — horn and turn-signal flasher driven by the internal logic
- Braking & safety — brake-circuit feed and brake-lamp drive
- Climate & cooling — HVAC blower and multi-stage cooling-fan control
Because the switching logic lives in the box, a CAN-equipped cab can command all of the above over the bus instead of running a discrete switch wire to each function — that integration is the reason to choose the NBX-952 over the passive NBX-954.
How it differs from NBX-957 and NBX-954
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:
| Model | Role | CAN logic | Best for |
|---|---|---|---|
| NBX-957 | Passive body central PDB | No (pure fuse + relay) | Programs where a separate BCM owns the logic |
| NBX-954 | Central distribution box | No (passive) | Mid-density body wiring without CAN integration |
| NBX-952 | Centralized PDB + body control logic | Yes (J1939 / program-specific) | Programs that want one box covering both distribution and body-circuit logic |
For the architectural decision between a junction box, a fuse box and a relay-fuse-CAN combination 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, fuse-circuit continuity, CAN message echo) 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 central-PDB lineup are the NBX-957 body central PDB and NBX-954 central distribution box. For high-circuit-count programs without integrated control, see the NBX-972 65-circuit 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.
