Halogen-Free Flexible USB 2.0 Cable for Rail Vehicles
A compact, shielded USB 2.0 cable design for onboard displays, ticket printers, and handheld equipment in rail vehicles. The four-core reference construction combines halogen-free materials with foil and braid shielding.
Key Highlights
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This design serves USB connections in passenger information equipment, ticketing hardware, and operator consoles. Its 5.2 mm reference diameter is suited to device housings with limited space at cable entries. Related onboard wiring constructions are covered under halogen-free cables for rail vehicles.
| Component | Reference design |
| Conductors | Four fine-stranded bare copper conductors, 28 AWG |
| Core insulation | Halogen-free polymer |
| Overall screen | Aluminum foil and tinned copper braid |
| Drain wire | 30 AWG tinned copper beneath the braid |
| Outer jacket | Black halogen-free compound |
| Parameter | Reference value |
| Peak operating voltage of bulk cable | 30 V max. |
| Dielectric test voltage | 600 V core-to-core and core-to-screen |
| Minimum bend radius | 15 × cable OD fixed, 10 × OD flexible |
| Temperature range | −50 to +90 °C in fixed and flexible applications |
| Rail fire-performance reference | EN 45545-2 R15 (EL1A) and R16 (EL1B), HL1–HL3 |
| Flame test references | IEC 60332-1-2 and IEC 60332-3-24 / IEC 60332-3-25 |
| Smoke and toxicity references | IEC 61034 and EN 50305 |
| Oil and fuel resistance reference | EN 50264-1 |
| Conductor layout | Nominal OD (±10%) | Copper figure | Approx. cable weight | Max. conductor resistance at 20 °C |
| 4 × 28 AWG, 7 strands per conductor | 5.2 mm | 14.3 kg/km | 41 kg/km | 223.8 Ω/km |
THE FACTORY
BEHIND EVERY METER
Founded in 2007 in Foshan, Guangdong, Hulk Electric has grown from a regional producer into a globally recognised manufacturer of customised industrial cable solutions. Our 10,000㎡ facility runs on Toyota Production System lean principles, operated by 150+ skilled professionals producing over 300,000 metres every month.
Every cable you see on this page — including the HK-TRVV series — is engineered, extruded, tested, and shipped from that single facility. No trading company sits between you and the extrusion line.
Source Factory
Direct manufacturer — no middlemen, no markups. You deal with the engineers who run the line.
Deep Customization
Conductor, shielding, jacket compound, colour coding, certification — built to your exact spec.
7-Day Sampling
Rapid samples for new specifications. 15-day lead time on standard production orders.
Global Compliance
35+ certifications covering UL, CE, TÜV, IEC, RoHS and REACH for every major market.
BEFORE YOU ORDER
For stocked configurations listed in the ordering table, MOQ is 100 metres per specification. Custom configurations — non-standard core counts, jacket colours, or special compounds — carry a 500 metre MOQ. Samples of 5–10 metres are available free of charge for qualification testing.
Use shielded (P or PP suffix) whenever the cable runs alongside servo drives, VFDs, or inverters, or when carrying encoder, sensor, or analogue signals. Unshielded is suitable for pure power distribution and simple on/off control lines. If in doubt, our engineering team can review your cabinet layout and advise — this is included with any quotation.
Yes. Send us the existing part number or a sample and we will produce a cross-reference specification with matching electrical, mechanical, and dimensional characteristics. Most cross-references are turned around within 3 working days, with a physical sample following within 7 days.
Standard shipments include the CE Declaration of Conformity, RoHS and REACH statements, and the batch test report. UL Recognition (UL 2464 / UL 20549) is available on request for North American projects — specify this at the quotation stage as it affects the material specification.
Standard configurations ship in 15 working days from order confirmation. Custom-engineered specifications typically require 20–25 working days, depending on compound availability. Rapid sampling for new specifications is 7 days. We will confirm the exact date in writing with your order acknowledgement.
Engineering Support for Your Application
Tell Us How Your Cable Needs to Move
Send us a datasheet, drawing, existing cable model or a short description of your application. Our engineering team will help you identify a suitable cable construction.
- 01 Motion type, travel distance and minimum bend radius
- 02 Voltage, current, signal protocol and shielding needs
- 03 Operating environment, target service life and quantity