SMT assembly line for automotive electronic control boards
NBX-series power distribution boards are assembled in-house under an IATF 16949 quality system.

What this page is

This is the direct factory contact page for buyers searching for a power distribution box manufacturer in China. It covers what we make, how we make it, who we make it for, and how to get drawings, samples and a quote moving in 24 hours.

If you are evaluating Chinese sources for a commercial-vehicle or construction-machinery program, the information below is the same set we provide to engineering teams during early-stage supplier qualification.

Who Youlai is

Changsha Youlai Electronic Technology Co., Ltd. is an IATF 16949 certified OEM electronics manufacturer based in Changsha, Hunan, China. Since 2014 we have supplied vehicle electronics — power distribution, body control, switching, sensors, displays — to leading Chinese commercial-vehicle and construction-machinery OEMs including SANY, XCMG, ZOOMLION, SINOTRUK, Shaanxi Heavy Truck, YUTONG, FOTON and BYD.

Our manufacturing footprint is 3 SMT automated lines, 1 THT automated flow line and 4 standard assembly lines, supported by an in-house environmental laboratory with EMC pre-compliance equipment. Quality system is certified to IATF 16949, with ISO 14001 and ISO 45001 alongside.

What we make in Power Distribution

  • Central Power Distribution Boxes — NBX‑950, NBX‑957, NBX‑953, NBX‑958, NBX‑970, NBX‑971; from compact cabin units up to 47-circuit whole-vehicle distribution, multi-relay + multi-fuse architecture.
  • Fuse Boxes — NBX‑955 (12-way), NBX‑981 (15-way) — ATO/ATC, mini-fuse and Bussmann options.
  • Relay Boxes — NBX‑2404 6-channel modular relay box with reverse-polarity protection.
  • Junction Boxes & Sealed Enclosures — NBX‑961 excavator integrated box, NBX‑969 chassis box, NBX‑968 sealed enclosure. IP65 / IP67 available.

The full Power Distribution catalogue is on the Power Distribution overview page.

Through-hole assembly station with components staged beside a circuit board and wave-solder equipment in the background
Through-hole assembly for automotive power distribution products, with ESD control at each station.

How we work with overseas OEM buyers

  1. Briefing. Share target vehicle / machine model, expected annual volume, working voltage, IP rating, temperature range, vibration class, communication protocol (CAN 2.0 / CAN-FD / J1939) and connector preference.
  2. Selection or custom. We propose the closest standard NBX model. If your program needs a different circuit count, layout, fuse mix or sealing, we quote a custom variant on the same NBX platform.
  3. Sample & validation. Engineering samples within 2–4 weeks for standard variants. Validation supported by our in-house environmental lab + EMC pre-compliance.
  4. Mass production. SMT/THT automated lines, in-process inspection, end-of-line functional test, traceable batch records.
  5. Documentation. Drawing package, BOM, IATF documentation, IP test reports. Region-specific approvals (e-Mark / ECE, SASO, FCC) available upon project requirement.

Why OEMs choose us as their China PDB partner

  • Engineering-led, not catalogue-only. Every NBX model is a project we own end-to-end, from PCB design through harness validation. Custom variants are routine, not an exception.
  • Full product family coverage. Buyers consolidating the harness side of a program get power distribution, BCM/VCU/PMU/T-BOX, switches and sensors, displays and HUD from one supplier — see the four product families.
  • OEM track record. 12+ years of delivering against Chinese commercial-vehicle and construction-machinery OEM programs.
  • Direct contact. No call centres, no CRM bots — sales mobile +86 134 6767 4786, also on WhatsApp.

Get a quote moving

Send drawings or specs to [email protected] or message us on WhatsApp. Typical reply within 24 hours during China business hours (UTC+8). NDA on request.