Dongfeng KR truck parts DPF prohibition regeneration switch assembly 3750267-C5100

Built to regulate the DPF regeneration process of Dongfeng KR trucks, this switch assembly provides reliable manual intervention for critical working conditions. When activated (button pressed), it sends a 5V digital signal to the ECU, immediately prohibiting the DPF from initiating active regeneration—essential when the truck operates in flammable environments (e.g., grain depots, chemical plants) or during short-distance low-load runs. The switch features a latching design: it maintains the prohibition state until manually reset, with an LED indicator (red) that illuminates to confirm the signal is transmitted. The response time is ≤50ms, ensuring the ECU halts regeneration before the DPF temperature rises above 300℃, eliminating fire risks and protecting the DPF from unnecessary wear

Engineered for the harsh operating environment of Dongfeng KR trucks (long-haul logistics, urban distribution), the switch assembly boasts a durable construction. The shell is made of flame-retardant ABS+PC alloy (UL94 V-0 rating), resisting impact from accidental knocks and preventing fire spread. The internal contact points use silver-plated copper alloy, ensuring low contact resistance (≤0.01Ω) and stable conductivity after 100,000 on-off cycles. A stainless steel spring (304 grade) provides consistent button rebound force, avoiding jamming even with long-term use. The assembly withstands cab vibrations up to 10g (5-2000Hz, ISO 16750-3) and temperature fluctuations from -40℃ (northeast winters) to 85℃ (cab summer heat), maintaining reliable performance

Designed to adapt to the varied working conditions of Dongfeng KR trucks (humid south, dusty northwest), the switch assembly exhibits exceptional environmental resistance. It achieves IP67 waterproof/dustproof rating: the button interface uses a fluororubber (FKM) seal that prevents water and dust intrusion even in heavy rain or construction site environments. The wiring harness’s outer sheath is made of oil-resistant PVC, resisting corrosion from diesel, engine oil, and cleaning agents—no swelling after 72-hour immersion in diesel. The connector’s double O-ring seal prevents moisture from entering the electrical contacts, while the ABS+PC shell resists UV aging (2000-hour QUV testing) without fading or cracking, ensuring a service life of ≥800,000km

Optimized for driver convenience and fleet maintenance, the switch assembly features a user-centric design. The panel-mount installation uses 2 M4×10 self-tapping screws that match the instrument panel’s original threaded holes, allowing a single technician to complete installation in 15 minutes with a Phillips screwdriver. The button is marked with clear icons (“DPF REG PROHIBIT”) and a red LED indicator, enabling drivers to quickly identify the switch state. The wiring harness includes color-coded wires (red for positive, black for ground, blue for signal) and a plug-and-play connector, eliminating wiring errors. It requires no regular maintenance—thanks to wear-resistant contacts and sealed structure—and comes with a 1-year/100,000km warranty, reducing fleet maintenance costs