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Products · Power Distribution · Selector

NBX Power Distribution Box Selector

Compare 22 publicly listed Youlai NBX-series power distribution boxes for commercial vehicles and machinery: 19 in-depth model pages plus three catalog-listed junction variants.

Compare models Read the box-type guide

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.

  1. Choose the box role — central distribution, fuse protection, relay switching, harness junction or battery main-feed protection.
  2. Match the mounting environment — cabin (IP54), sealed outdoor (IP65), wash-down / off-road (IP67), or special dry-zone / battery placement.
  3. Compare voltage band, circuit count and logic, then follow the model link. Rows marked Catalog listing jump to the matching family card so you can request the current datasheet.

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 Voltage Circuits / capacity Sealing On-board logic Best for
NBX-950Compact central PDB Central PDB 9–32 VDC Compact · 16 fuse + 5 relay (12 functions) IP54 Passive Cabin install · light commercial
NBX-95832-way central PDB Central PDB 9–32 VDC 32 circuits · 15 relay + 32 fuse IP54 Passive Heavy truck · bus · mid machinery
NBX-97042-way central PDB Central PDB 9–32 VDC 42 circuits · 14 relay + 40 fuse IP54 Passive Heavy truck · coach · bus chassis
NBX-95347-way distribution box Central PDB 9–32 VDC 47 circuits · multi-fuse + relay IP54 Passive Heavy truck · 6×4 / 8×4 tractor
NBX-957Body central PDB (general-purpose) Central PDB 9–32 VDC Configurable · 25 relay + 36 fuse (15 functions) IP54 (IP65 variant) Passive Heavy truck · bus · light commercial
NBX-97265-circuit high-density PDB Central PDB 9–32 VDC 65 fused circuits · 25 relays IP4X vented Passive Heavy diesel truck · machinery (dry-zone)
NBX-952Centralized body control & PDB Central PDB 9–32 VDC CAN · 12 relay + 30 fuse (~92-pin) IP65 CAN bus Body control · heavy truck · bus
NBX-954Passive central distribution box Central PDB 9–32 VDC Passive · 12 relay + 26 fuse (~106-pin) IP65 Passive (external BCM) Heavy-truck body distribution · separate-BCM programmes
NBX-971Waterproof central PDB Central PDB 9–32 VDC Configurable · multi-fuse + relay IP67 Passive Heavy-truck chassis · off-road · excavator
NBX-95512-way fuse box (entry) Fuse box 12 V / 24 V 12 circuits · ATO/ATC blade IP54 Passive Cab fuse panel · light truck
NBX-98115-way fuse box Fuse box 12 V / 24 V 15 circuits · 7 relay positions (reference build) IP54 Passive Cab panel · light/medium truck · coach
NBX-230117-way fuse box Fuse box 9–32 VDC 17 fuse positions · optional relay sockets IP54 Passive Heavy truck · bus · light commercial
NBX-24046-channel relay box Relay box 12 V / 24 V 6 relay channels · ISO mini sockets IP54 Passive Body switching · lighting · wiper / fan / heater
NBX-980Battery main-feed fuse module Battery-fuse 9–36 VDC 6 + 2 bolt-down outputs · MEGA / MIDI IP53 Passive Battery main feed · excavator main fuse
NBX-961Excavator integrated box Junction & sealed 9–32 VDC Configurable layout IP67 Passive Excavator · wheel loader · crane
NBX-969Chassis distribution box Junction & sealed 9–32 VDC Configurable IP65 Passive Heavy-truck chassis · logistics
NBX-968Sealed electrical box Junction & sealed 9–32 VDC Configurable (fuse / relay / terminal) IP65 Passive Chassis enclosure · outdoor junction · trailer
NBX-965Sealed junction box Junction & sealed 9–32 VDC 2 inlets · terminal only (no fuse/relay) IP54 Passive Cabin branching · under-dash junction
NBX-966Junction terminal block Junction & sealed 9–32 VDC 3 banks (A/B/C) · terminal only Open Passive Harness consolidation · cabin terminal
NBX-962Catalog listingFirewall junction variant Junction & sealed Per programme Per programme Confirm for programme Passive Firewall harness junction
NBX-964Catalog listingFirewall junction variant Junction & sealed Per programme Per programme Confirm for programme Passive Firewall harness junction
NBX-2055Catalog listingBase-section junction variant Junction & sealed Per programme Per programme Confirm for programme Passive Base-section harness junction

Swipe the table sideways to see every column.

Download the NBX series line card (PDF) Printable A4 of this table. If the sheet and this page differ, this page is correct.
Narrowed your shortlist? Send the model(s) with system voltage, circuit count and IP rating — we reply with the datasheet and a quotation.
Ask on WhatsApp Email details

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.

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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.