Power Distribution Box Selector — Compare NBX Models

How to use this selector

Use the table as a first shortlist, not a final datasheet. Each NBX box is configured against your harness drawing, so fuse ratings, relay count, connector pin-out and sealing details are confirmed during quotation.

Choose the box role — central distribution, fuse protection, relay switching, harness junction or battery main-feed protection.
Match the mounting environment — cabin (IP54), sealed outdoor (IP65), wash-down / off-road (IP67), or special dry-zone / battery placement.
Compare circuit count and logic, then open the model page for details.

Voltage — most central and sealed NBX platforms cover 9–32 VDC for 12 V and 24 V systems; some fuse / relay boxes are specified as 12 V / 24 V, and the NBX-980 spans 9–36 VDC. Circuit count, sealing and box role usually decide the shortlist.

Reference specs, not a datasheet — figures below are representative production builds. The final fuse map, connector pin-out and sealing options are confirmed against your harness drawing in an RFQ.

Model	Box type	Circuits / capacity	Sealing	On-board logic	Best for
NBX-950Compact central PDB	Central PDB	Compact · 16 fuse + 5 relay (12 functions)	IP54	Passive	Cabin install · light commercial
NBX-95832-way central PDB	Central PDB	32 circuits · 15 relay + 32 fuse	IP54	Passive	Heavy truck · bus · mid machinery
NBX-97042-way central PDB	Central PDB	42 circuits · 14 relay + 40 fuse	IP54	Passive	Heavy truck · coach · bus chassis
NBX-95347-way distribution box	Central PDB	47 circuits · multi-fuse + relay	IP54	Passive	Heavy truck · 6×4 / 8×4 tractor
NBX-957Body central PDB (general-purpose)	Central PDB	Configurable · 25 relay + 36 fuse (15 functions)	IP54 (IP65 var.)	Passive	Heavy truck · bus · light commercial
NBX-97265-circuit high-density PDB	Central PDB	65 fused circuits · 25 relays	IP4x vented	Passive	Heavy diesel truck · machinery (dry-zone)
NBX-952Centralized body control & PDB	Central PDB	CAN · 12 relay + 30 fuse (~92-pin)	IP65	CAN bus	Body control · heavy truck · bus
NBX-954Passive central distribution box	Central PDB	Passive · 12 relay + 26 fuse (~106-pin)	IP65	Passive (external BCM)	Heavy-truck body dist · separate-BCM programs
NBX-971Waterproof central PDB	Central PDB	Configurable · multi-fuse + relay	IP67	Passive	Heavy-truck chassis · off-road · excavator
NBX-95512-way fuse box (entry)	Fuse box	12 circuits · ATO/ATC blade	IP54	Passive	Cab fuse panel · light truck
NBX-98115-way fuse box	Fuse box	15 circuits · optional relay sockets	IP54	Passive	Cab panel · light/medium truck · coach
NBX-230117-way fuse box	Fuse box	17 fuse positions · optional relay sockets	IP54	Passive	Heavy truck · bus · light commercial
NBX-24046-channel relay box	Relay box	6 relay channels · ISO mini sockets	IP54	Passive	Body switching · lighting · wiper / fan / heater
NBX-980Battery main-feed fuse module	Battery-fuse	6 + 2 bolt-down outputs · MEGA / MIDI	IP53	Passive	Battery main feed · excavator main fuse
NBX-961Excavator integrated box	Junction & sealed	Configurable layout	IP67	Passive	Excavator · wheel loader · crane
NBX-969Chassis distribution box	Junction & sealed	Configurable	IP65	Passive	Heavy-truck chassis · logistics
NBX-968Sealed electrical box	Junction & sealed	Configurable (fuse / relay / terminal)	IP65	Passive	Chassis enclosure · outdoor junction · trailer
NBX-965Sealed junction box	Junction & sealed	2 inlets · terminal only (no fuse/relay)	IP54	Passive	Cabin branching · under-dash junction
NBX-966Junction terminal block	Junction & sealed	3 banks (A/B/C) · terminal only	Open	Passive	Harness consolidation · cabin terminal

Swipe the table sideways to see every column.

Narrowed your shortlist? Send the model(s) with system voltage, circuit count and IP rating — we reply with the datasheet and a quotation.

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Reference builds only; final fuse map, connector pin-out and sealing options are confirmed against your harness drawing.

Common questions

Central PDB or fuse box — which do I need?

A fuse box only protects circuits; a central power distribution box combines fusing, relay switching and distribution in one housing. Use a fuse box (NBX-955, 981 or 2301) for a cab or auxiliary panel, and step up to a central PDB once a single enclosure has to feed and switch the whole body harness.

When is IP67 worth it over IP54 or IP65?

IP54 covers protected cabin and behind-dash positions, and IP65 is used for sealed placements where the mounting position and connector set allow water-jet exposure. Specify IP67 — the NBX-971 or the NBX-961 excavator box — only when the enclosure can be briefly submerged or sits in a wash-down or fording zone on off-road machinery. Over-sealing a cabin box can add unnecessary cost and packaging complexity.

Can one NBX box run both 12 V and 24 V?

Most central and sealed NBX platforms are rated 9–32 VDC, so the same platform can usually be specified for both 12 V and 24 V programmes. A few fuse and relay boxes are specified as 12 V / 24 V, and the NBX-980 battery module spans 9–36 VDC. The exact rating is confirmed against your programme.

Which model fits a high-circuit heavy-truck harness?

Count your circuits and leave 10–15% headroom: NBX-958 (32), NBX-970 (42), NBX-953 (47) and the vented dry-zone NBX-972 (65). Where the build follows a harness drawing rather than a fixed count, the general-purpose NBX-957 is usually the starting point.

What do you need to quote the right box?

Application and vehicle, system voltage, circuit or channel count, IP rating and mounting location, connector family, and annual volume with target SOP date. The RFQ checklist walks through each one, so the first reply already has the right datasheet and drawing pack.

Get in Touch

Talk to Our OEM Project Team

Reply within 24 hours (UTC+8). Send drawings or specifications via WhatsApp or email.

When reaching out, please share with us: target vehicle / machine model, expected annual volume, and key technical requirements (CAN protocol, IP rating, working temperature, connector preference). Drawings welcome.

NBX Power Distribution Box Selector

How to use this selector

Common questions

Central PDB or fuse box — which do I need?

When is IP67 worth it over IP54 or IP65?

Can one NBX box run both 12 V and 24 V?

Which model fits a high-circuit heavy-truck harness?

What do you need to quote the right box?

Talk to Our OEM Project Team

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