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New Dongfeng Jinlan Heavy Truck Cab Electrical Spare Parts Central Distribution Box Assembly 37N48B-22010 for 2008- Models

New Dongfeng Jinlan Heavy Truck Cab Electrical Spare Parts Central Distribution Box Assembly 37N48B-22010 for 2008- Models

The Central Distribution Box Assembly (Part No. 37N48B-22010) is an OEM-specified electrical power management module designed for use in Dongfeng commercial vehicles, particularly the classic 1290, 153, and 1230 series heavy-duty trucks. Officially known as the Central Fuse & Relay Box, this unit serves as the "nerve center" of the vehicle’s cabin electrical system, integrating all major fuses and relays into a single, compact enclosure.

Mounted inside the cab—typically on the passenger side or beneath the dashboard—it manages and protects essential circuits such as lighting, wipers, HVAC, instrument cluster, ECU power supply, horn, and auxiliary systems. With its modular design and plug-in components, it greatly simplifies troubleshooting, reduces wiring complexity, and enhances overall electrical reliability.

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Model:
37N48B-22010
Brand:
Dongfeng

Product Description

Attribute	Specification
Product Name	Central Electrical Distribution Box / Cabin Fuse & Relay Box
Manufacturer	Dongfeng Commercial Vehicles Co., Ltd. (OEM)
Primary Part Number	37N48B-22010
Alternative Names	Power Distribution Module (PDM), Relay-Fuse Junction Box
Voltage System	24V DC (standard for Chinese heavy-duty trucks)
Housing Material	Flame-retardant PBT/ABS composite engineering plastic
Mounting Location	Passenger-side A-pillar or under-dash area
Protection Level	Dust-resistant and moisture-protected (sealed cover)
Application Class	Medium- to Heavy-Duty Commercial Trucks

Parameter	Value / Detail
Operating Voltage	24V DC nominal (range: 18–32V)
Total Input Current Rating	Up to 100A or higher (via main feed cable)
Circuit Protection
- Fuse Types	Blade-type (ATO, ATC, Mini, Maxi)
- Rated Currents	5A, 10A, 15A, 20A, 30A (color-coded per standard)
- Quantity	Typically 20–40 fuse slots (varies by configuration)
Relay Integration
- Relay Types	ISO standard mini/micro relays (e.g., 40A)
- Functions	Headlights, wipers, starter, heater fan, horn, etc.
- Quantity	Approx. 8–12 relay sockets
Connection Interface	Multiple multi-pin connectors at bottom for chassis and cabin harnesses
Sealing Design	Lockable transparent or semi-transparent lid with printed circuit map
Operating Temperature Range	-40°C to +85°C (-40°F to +185°F)
Vibration Resistance	High — Designed for off-road and mining duty cycles
Weight	~1.3 – 1.8 kg (2.9 – 4.0 lbs)