[Hangzhou, China] – COMOTECH ASIA PACIFIC (CAP), a Sino-French OE specialist in professional automotive electrical systems, is proud to introduce its Rotary Headlight Switch for Trucks & Buses (Model: C31302-010). Engineered as a premium multi-function lighting control solution for the commercial vehicle segment, this rotary switch integrates traditional manual lighting modes with a modern "Auto" position — providing truck and bus operators with a level of lighting automation normally found only in high-end passenger vehicles.
The "Auto" Position: Automated Lighting for Professional Drivers The defining feature of the C31302-010 is its "Auto" operating position, which enables the vehicle's lighting control system to automatically manage headlight activation based on ambient light conditions. For truck and bus drivers — who face frequent transitions between daylight, tunnels, overpasses, and night driving — the Auto position eliminates the need to manually switch between lighting modes, ensuring that the vehicle's lights are always in the correct state for current visibility conditions. This is particularly valuable for fleet operators, where consistent correct lighting usage directly contributes to both road safety compliance and reduced driver workload. The switch's design reference to the established AE 120 A WX specification family ensures a familiar, proven operating logic for drivers and aftermarket technicians alike.
Wide Operating Voltage: +5V Logic with +VBAT Power (8V–32V) The C31302-010 is engineered with a dual-voltage architecture that separates the switch's control logic from its power handling: the internal logic operates at +5V, while the power channel accepts +VBAT in the range of +8V to +32V. This wide input range is a critical specification for commercial vehicles, which span multiple electrical system standards — 12V systems in medium-duty trucks and buses, and 24V systems in heavy-duty commercial fleets. A single C31302-010 SKU covers both voltage platforms, simplifying parts inventory for distributors and fleet maintenance programs serving mixed fleets, while the isolated logic supply ensures stable, reliable switching behavior across the full voltage spectrum.
Professional White Backlight: Precision-Matched Illumination The switch is illuminated by a professional white backlight calibrated to color coordinates Cx=0.33, Cy=0.33 — the standard white point used in professional automotive interior lighting design. This precision color matching is not a cosmetic detail: it ensures that the switch's illumination blends seamlessly with other dashboard lighting elements in the vehicle cabin, avoiding the jarring color temperature mismatch that low-quality aftermarket switches produce. With a nominal current draw of just 10mA, the backlight circuit is optimized for minimal electrical load — a meaningful consideration in commercial vehicles where every milliamp of auxiliary draw affects battery state during prolonged engine-off idling periods.
Built for the Commercial Vehicle Environment Designed specifically for truck and bus applications, the C31302-010 is constructed to withstand the demanding conditions of professional commercial transport — continuous vibration, wide temperature swings, and high-frequency daily operation. Priced at USD 10.5 per unit with a minimum order of 200 pieces and a monthly supply capacity of 3,000 units, it provides distributors, commercial vehicle parts suppliers, and fleet procurement teams with a reliable, specification-rich lighting control solution, backed by CAP's ISO9001-certified quality management.