OEM Buyer Guides & Engineering Resources
Commercial-vehicle electronics buyer guides for OEM teams — compare product options, define key specifications and prepare better sourcing questions.
Start with the whole vehicle
Locate the system layer first, then move into the product family that owns your question.
Go deeper by product family — each has its own technical guide.
Power Distribution Box: functions & OEM applications
Fuse boxes, relay boxes and junction boxes for commercial vehicles, and how to tell which one a job actually needs.
Read guideSmart Control Modules: BCM, VCU, PMU & T-BOX
The BCM, VCU, PMU and T-BOX that run the electronics on a vehicle, what each one does, and how they talk over the CAN bus.
Read guideSwitches & Sensors: CAN panels, TPMS & HMI
The switches and sensors a driver touches — CAN switch panels, TPMS and rain-light sensors that feed the control modules.
Read guideDisplays & HUD: clusters & CMS mirrors
Instrument clusters, head-up displays and CMS electronic mirrors, and how to match the right screen to a cab.
Read guideDecisions that span every product family
Questions that apply across distribution, control modules, switches and displays.
IP Ratings for Commercial Vehicle Electronics
What the two digits test, why automotive codes such as IP5K2 are not IEC 60529, and how to pick a level by mounting position.
Read selection guide12 V vs 24 V Commercial Vehicle Electrical Systems
Why heavy vehicles run 24 V, how contact ratings derate as voltage rises, and the two correct ways to build a 12 V branch on a 24 V truck.
Read selection guideAutomotive Connectors for Commercial Vehicles
Why the mated joint, not the enclosure, sets the sealing class; how to tell the harness half from the module half; and what limits current per pin.
Read selection guideBuyer guide index
Browse buyer guides by product family, comparison topic, or vehicle application.
Power Distribution 4 guides
Compare modelsFuse Box Buyer Guide
Which published circuit step to land on, fuse format by rail, and the housing-plus-gauge mix — before the drawing is frozen.
Read guideRelay Box vs Fuse Box vs Junction Box
Three boxes people mix up: which one protects the circuits, which switches them, and which just ties them together.
Read guideIP67 Waterproof Distribution Box
How a sealed chassis distribution box is built for wet, exposed mounting, and when IP67 is the right spec.
Read guideExcavator Power Distribution Box
Power distribution built for construction machines that live with constant vibration, dust and heat.
Read guideSmart Control Modules 10 guides
Compare modelsHeavy Truck BCM: what a BCM does
The body control module behind the lights, wipers, doors and signals on a truck, and how it talks to the CAN / J1939 bus.
Read guideBCM vs VCU vs PMU: what is the difference
Three control modules, side by side: what each one is responsible for, and when a single box can cover more than one job.
Read guideJ1939 CAN Gateway: when a truck needs one
Which messages should cross between CAN segments, and how to write that forward list into an RFQ.
Read guideSwitches & Sensors 6 guides
Compare modelsCAN vs LIN vs Hard-Wired Switches
How the three switch interfaces compare on wiring, cost, sealing and diagnostics, and how to choose for a truck, bus or machine dashboard.
Read guideCAN Bus Switch Panel
How a CAN switch panel clears out dashboard wiring, and when LIN or plain hard-wired switches are still the better call.
Read guideHeavy-Truck TPMS
How wheel sensors get tyre pressure to the cab, and what separates valve-stem from clamp-mount mounting.
Read guideBus Stop Request Buttons
How bus stop buttons work, when to choose wired or wireless, and what accessibility details matter before sourcing.
Read guideRain and Light Sensors
How automatic wipers and headlamps work, and when to choose a windscreen light-and-rain sensor over a simpler dash-top sun-load sensor.
Read guidePower-Window & Door Switch Panels
Choosing a LIN cab-door switch panel: 12 V vs 24 V, windows-only vs a full window/lock/mirror master, and direct drive vs a door module.
Read guideDisplays & HUD 4 guides
Compare modelsCommercial Vehicle HUD
Windshield versus combiner head-up displays, where the data comes from, and which one fits a truck or bus cab.
Read guideCommercial Vehicle Instrument Cluster
Digital and hybrid dashboards: what they read off the CAN bus, how they show EV status, and how to choose a format.
Read guideHUD vs Digital Cluster: how to choose
What a digital cluster, a combiner HUD and a windshield HUD each do — and how to tell which one a cab needs, or whether it needs both.
Read guideCommercial Vehicle Mirror Systems
How powered mirror control works, what field-of-view rules require, and where camera monitor systems (electronic mirrors) are starting to replace glass.
Read guideOEM Sourcing Tools & Supplier Pages
Start with the qualification and RFQ tools, then use a supplier page for the product family you are buying, or the design row if no published platform fits.
Power Distribution Box Manufacturer
Fuse, relay and junction boxes built to your circuit count, sealing class and connector spec.
Get a quoteHeavy Truck BCM Supplier
Body control modules built to your CAN / J1939 network and electrical load plan.
Get a quoteCAN Bus Switch Panel OEM Manufacturer
Multiplexed switch panels and keypads built to your key layout and CAN bus design.
Get a quoteCommercial Vehicle Sensor Manufacturer
TPMS, rain-light and fuel-level sensors built to your vehicle type, wheel layout and mounting points.
Get a quoteDisplay & HUD Manufacturer
Instrument clusters, CAN displays and head-up displays built to your CAN spec and bracket drawings.
Get a quoteDesign and Development (OEM / ODM)
A new part designed from your requirement when no published platform fits.
Get a quoteTalk to Our OEM Project Team
Typical reply within one business day. A model number, or one line on what you need, is enough.