Why a structured RFQ beats a spec-sheet download
Youlai's products — NBX power distribution boxes, EBX control modules, switch panels, sensors, instrument clusters and HUDs — are supplied as published catalogue parts, or configured to a vehicle program. On a configured part, circuit count, sealing class, CAN / J1939 network, connector family and firmware can change per customer. That is why we work from your requirements — the six groups below are what our engineering team uses to pick the closest base model, separate what is standard from a modification, and prepare the datasheet, 2D/3D drawing pack and quote. If no platform fits, the same RFQ is used to scope a new design. If you are still deciding how the boxes should be split rather than which box to order, read the commercial-vehicle E/E architecture guide first — it works through the power, control, network and driver-interface layers that these six groups then pin down.
How a request becomes a quote
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1
You send requirements
The checklist or template below — as much as you know so far.
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2
We match a base model
Engineering picks the closest platform and flags what needs modifying — or scopes a new design when nothing fits.
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3
Datasheet & drawings
Datasheet plus 2D dimensional and, where needed, 3D STEP drawings.
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4
Quote & samples
Pricing to your volume, sample lead time and the documentation package.
The 6-point RFQ checklist
You do not need every field — but the more of these you can share up front, the more precise the first reply will be.
Enough to start: the application and vehicle, the system voltage and current, the sealing and temperature the part has to survive, and your annual volume (or a note that volume is not yet decided).
Application & vehicle
- Vehicle / machine type — heavy truck, bus, excavator, agricultural, trailer, etc.
- Where it mounts — in-cab, chassis, engine bay, exposed.
- What it needs to do — the function in one line.
Electrical
- System voltage — 12 V, 24 V, or dual. Give the continuous range rather than the nominal figure alone, and add the cranking and jump-start conditions; the 12 V vs 24 V guide shows what a complete voltage line looks like.
- Total / per-circuit current and number of circuits or channels.
- Fusing / switching needs — blade fuse, bolt-down, relay, solid-state.
Environment & mechanical
- IP rating — IP65, IP67, or sealed to a specific test. State the standard alongside the number and name the mounting position; the IP ratings guide shows how to write this line so it holds up.
- Operating temperature range.
- Vibration / size / mounting constraints or an envelope drawing.
Communication & logic
- Bus / interface — CAN 2.0 / CAN-FD, J1939, LIN, or hard-wired.
- Message / DBC or I/O map if you have one.
- Firmware behaviour or diagnostics (UDS) expected.
Connector & interface
- Connector family — Deutsch DT, TE / AMP, Molex, or your standard. How to write this line.
- Pin-out / mating harness requirements, and which half each side supplies.
- Terminal & wire gauge preferences.
Program & commercial
- Annual volume (or a note that volume is not yet decided), and order cadence.
- Target markets & compliance — e-Mark, SASO, FCC / DOT.
- Timeline — samples, SOP date, and documentation needed (PPAP, drawings, test reports).
Copy-paste RFQ template
Fill in the lines that apply and send it however is easiest — WhatsApp, email, or the contact page. Anything you leave blank we will simply ask about.
RFQ — Youlai OEM electronics - Product / application: - Vehicle / machine type & mounting: - System voltage (12 V / 24 V): - Current & number of circuits / channels: - IP rating & operating temperature: - Protocol (CAN / J1939 / LIN / hard-wired): - Connector family & pin-out: - Annual volume (or a note that volume is not yet decided) & target SOP date: - Target markets / compliance (e-Mark, SASO, FCC): - Documentation needed (datasheet, drawings, PPAP, test reports): - Drawings / DBC / reference attached: yes / no
What you get back
- Datasheet for the closest base model, with the modifications your program needs called out — or a design proposal when no platform fits, with development cost and timing quoted per programme.
- Drawing pack — 2D dimensional and, where relevant, 3D STEP for packaging and harness routing.
- Quote against your volume, plus sample lead time and tooling (if any).
- Documentation package for supplier qualification — IATF 16949, plus IP / EMC test reports and PPAP where the program requires them. See how we manufacture under IATF 16949.
What matters most, by product family
If you are still narrowing down the product, the family pages and buyer guides go deeper. These are the fields that most change the design in each family:
| Family | Specs that drive the design | Start here |
|---|---|---|
| Power Distribution | Circuit count, per-circuit current, fuse vs relay vs solid-state, IP rating, connector. | Power Distribution guide |
| Smart Control Modules | Function (BCM / VCU / PMU / T-BOX), CAN-FD / J1939, I/O count, load ratings, diagnostics. | Smart Control Modules guide |
| Switches & Sensors | Key layout, CAN vs LIN vs hard-wired, sensor type & mounting, backlight / HMI. | Switches & Sensors guide |
| Displays & HUD | Screen size & format, cluster vs HUD vs CMS mirror, CAN signal map, bracket / envelope. | Displays & HUD guide |
Send your RFQ
Pick whichever channel suits you — the WhatsApp and email buttons open with the template already filled in, ready for you to complete. Typical reply within one business day.