King Long Higer Bus Retarder Contact SZZ52018 with Stable Operation from -40℃ to 125℃ for 24V DC Vehicle-Mounted Systems and Fast Response Time ≤ 10ms

On a long, steep descent, a heavy bus undergoes the ultimate test of its braking system. This is where the electromagnetic retarder becomes the driver's most trusted tool—a powerful, auxiliary braking force that prevents service brake fade and ensures complete control. But this entire system, a marvel of engineering, is entirely dependent on one small, mission-critical component: the Retarder Contact.

Nanjing Dingguan Auto Parts Co., Ltd. is proud to manufacture the SZZ52018 Retarder Contact, the essential command switch for King Long and Higer buses.

Think of this contact as the bridge between driver intent and mechanical action. When the driver activates the retarder, it is this precise component that closes the circuit, sending the vital electrical signal that engages the powerful braking force. A worn or failing contact breaks this bridge. The signal is lost, the retarder fails to activate, and a critical safety system is rendered useless at the moment it is needed most.

Our SZZ52018 is engineered to eliminate this single point of failure. It is manufactured from premium, high-conductivity alloys and features contact points designed to resist the electrical arcing and mechanical wear of constant use. This ensures a crisp, immediate electrical signal every time, resulting in flawless, lag-free retarder activation.

Engineered as a direct, OEM-standard replacement, it guarantees a perfect fit and a swift installation process for your King Long and Higer fleet. By replacing this small, cost-effective part, you are not just performing maintenance; you are restoring the integrity of a life-saving system. This investment protects your service brakes from premature wear, significantly lowers maintenance costs, and provides your drivers with the unwavering confidence they need to navigate any terrain safely.

Trust Nanjing Dingguan for components where reliability is non-negotiable.

Contact our expert team today for a competitive quote.

Nanjing Dingguan Automotive Parts Co., Ltd. specializes in providing high-quality and cost-effective parts for buses and commercial vehicles. We focus on the global market, have rich experience in exporting bus and truck parts, provide services to distributors and fleet operators, and provide tailor-made solutions to meet different needs.

• High-Quality Bus Components: Specialized in premium aftermarket bus parts including engines, transmissions, and braking systems, built for durability and performance.
• Comprehensive Spare Parts Solution: We offer a full range of bus accessories: filters, suspension components, electrical components, and interior accessories for all major bus brands.
• ISO-Certified Manufacturing: Our ISO 9001/TS 16949-certified products ensure strict quality control, reliability, and compliance with international standards.
• Global Bus Part Coverage: Our products are compatible with leading bus models from Europe, Asia, and the Americas.
• Extensive Product Catalog: Engine parts, HVAC systems, lighting, wheels and safety components covering city, intercity and long-distance buses.