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Dongfeng Tianlong Flagship Heavy Truck Parts Brake Switch 3750410-C0100 Tianjin D310 Truck Brake Light Switch for Renault S.A.

The Reverse Light Switch (Part No. 3750410-C0100) is an OEM-specified mechanical-electrical sensor designed for use in Dongfeng commercial vehicles, particularly heavy-duty trucks such as the Tianlong (Kinland), Tianjin (Kingrun), and Hercules (Dali Shen) series. Officially known as the Backup Lamp Switch or Reverse Gear Sensor, this component is mounted on the transmission housing and mechanically actuated by the gear selector fork to detect when the vehicle is shifted into reverse gear.
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  • 3750410-C0100 

  • Dongfeng

Attribute Specification
Product Name Reverse Light Switch / Reverse Gear Position Sensor
Manufacturer Dongfeng Commercial Vehicles Co., Ltd. (OEM)
Primary Part Number 3750410-C0100
Alternative Names Backup Light Switch, Transmission Reverse Switch
Operating Voltage 24V DC (standard for heavy-duty trucks)
Contact Type Normally Open (NO) — closes on plunger compression
Mounting Thread M18 × 1.5 mm (fine thread; some variants use M16 × 1.5)
Actuation Method Mechanical push-type plunger
Housing Material High-strength brass or stainless steel (oil-resistant)
Contact Material Hard-wearing alloy tip (resistant to arcing and wear)
Sealing Level IP67 – Dust-tight and protected against temporary immersion
Operating Temperature Range -40°C to +120°C (-40°F to +248°F)
Connector Type 2-pin waterproof plug (round or square interface)
Application Class Heavy-Duty Manual Transmissions
刹车开关-1


刹车开关-2


Parameter Value / Detail
Electrical Rating 24V DC, up to 5A resistive load
Plunger Stroke ~1.5–2.0 mm (ensures reliable contact closure upon shift)
Switch Function Momentary closed circuit during reverse gear engagement
Environmental Resistance
- Oil Immersion Resists gear oil penetration
- Vibration Withstands continuous road shock and gear impact
- Thermal Cycling Stable performance from cold start to hot idle
Insulation Resistance ≥ 100 MΩ at 500V DC
Dielectric Strength > 1,000V AC between terminal and housing
Weight Approx. 150–220 g


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