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Safeguard your trailer and cargo with the reliable performance of the top-quality WABCO ABS Trailer Relay Valve. This component works in tandem with the ECU to prevent wheel lockup and skids, maintaining vehicle stability. The ECU constantly analyzes wheel speed data from sensors on each axle. When it detects a potential wheel lockup scenario during hard braking or on slippery surfaces, it sends a signal to the ABS trailer relay valve, which then reacts swiftly, precisely modulating air pressure in the brake chambers of the trailer. Featuring the brand’s advanced pressure control technology, the WABCO 4721950330 ensures exceptional responsiveness and optimal braking performance.
| Break Point | 0.3 bar |
| Max. operating pressure | 10.0 bar |
| Weight | 2.2046 |
| Port thread 4 | 3/8" - 18 NPTF - JED - 686 |
| Mounting | 4 x 5/16" - 18 UNC-2A |
| Port thread 3 | 3/4" - 18 NPTF |
| Temperature Range | -40°C to +80°C |
| Calculated Volume (dm³) | 1.2945 |
| Rated current | 2220 mA |
| Voltage | 12 V |
| Port thread 1 | 2x 3/4" - 18 NPTF |
| Port thread 2 | 4x 3/8" - 18 NPTF |
| Distance between bolts | 75x75 mm |
| Size | 98 x 111 x 119 |
| Electrical connection | Bayonet DIN 72585 A1-3.1-Sn/K1 |
| Protection class | IP 66 / IP 69 K |
| Port threads | M22 x 1.5 |
| Product Category | Device |
| Size (mm X Mm X Mm) | 98 x 111 x 119 |
| Technical specification | OE specification |
| Weight (kg) | 1 |
| Weight (lb) | 2.2046 |
| Part Type | Premium original quality |
| Brand | Part Number |
|---|---|
| Freightliner | TDAS4721950330 |
| Hyundai | 10003392 |
| Kenworth | S472-195-033-0 |
| MAC Trailer | 24900171 |
| Mack | 6300-4721950330 |
| Manac | 22802000, 228-02000 |
| Meritor | S4721950330 |
| Peterbilt | S472-195-033-0 |
| Volvo | WAB4721950330 |
| VANGUARD | 4721950330 |
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Whether it’s for cars, buses, trucks, or trailers, WABCO® is at the frontline at developing and providing products and systems to make vehicles safer and easier to control. Founded in 1869, WABCO is a major supplier of braking, stability, suspension and transmissions in the Americas and beyond. The company is recognized as introducing the modern air brake system in 1869, and continues to lead the industry in air brake design and production for the heavy duty and commercial vehicle sectors. Today, WABCO operates as a division of the German auto parts maker ZF and employs 16,000 employees in facilities in 36 countries worldwide.
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