WABCO EBS Trailer Modulator 4802040310 Electronic Brake Pressure Modulator for Semi Trailer EBS Brake System

The WABCO WABCO EBS Trailer Modulator (part number 4802040310) is a replacement component for the air brake and air suspension systems of heavy-duty trucks, buses and semi-trailers. It is built to original equipment specification from quality materials, so it installs on the original mounting points and performs reliably throughout the service life of the vehicle. Key ratings include Rated Voltage 24V, Max Working Pressure 8.5 bar, temperature range -40°C ~ +80°C, Port Threads M22*1.5, M16*1.5, built‑in silencer.

By working directly with the trailer EBS control unit, the modulator applies brake pressure in step with the tractor and supports ABS, roll-stability and load-sensing functions. Sealed electronics and a robust pneumatic section deliver stable performance under heavy vibration and in all weather, cutting brake lag and improving combination stability.

Every unit is manufactured to original equipment specification and inspected before it leaves the factory, so it matches the fit, function and durability of the original part. Sealed, vibration-tested construction keeps performance stable in the heat, dust, road salt and constant vibration found on commercial vehicles, and standard interfaces make installation and maintenance straightforward. Spare parts, technical data and fitting advice are available on request.

• Rated voltage:24V: Max working pressure:8.5 bar, temperature range -40°C ~ +80°C.
• Protection Class IP6K6K / IP6K9K: HDSCS electrical connector, nominal current 5A.
• Port Threads: M22*1.5: M16*1.5, built‑in silencer.
• Mounting: 3*M8 Bolts: Mounting hole spacing 80*80 mm, weight approx.2.9kg.
• Receives EBS Electronic Signal From Tractor: Controls trailer brake pressure, realizes ABS/EBS braking for semi‑trailer.
• OE Original Quality: Stable performance under heavy vibration.

The modulator is used on EBS-equipped semi-trailers, including curtainsiders, box trailers, flatbeds, tankers and container chassis. It is especially valuable for high-mileage fleets and for operators carrying unstable or high-value loads, where synchronized braking and roll stability reduce the risk of jack-knifing and trailer swing.

Every unit is packed in a neutral export carton with foam protection so that ports, connectors and levers arrive free from damage. OEM cartons and private labels are available on request, and each carton is labelled with the part number for simple warehouse handling. All units are produced to original equipment specification and inspected before shipment; a twelve-month quality warranty and full technical support are provided, and mixed containers can be supplied for distributors and repair workshops. Please contact us for samples, volume discount pricing and confirmed lead times.