Technical Specifications: Genuine VOLVO 5‑Pin Multi‑Purpose Power Relay Module 20374662Genuine VOLVO 5‑Pin Multi‑Purpose Power Relay Module — SPDT Plug‑In Circuit Switching Solution
The Genuine VOLVO Premium Heavy‑Duty 5‑Pin Multi‑Purpose Power Relay Module (Part Numbers: 20374662 / VOE 20374662 / 3171420), also known as Central Control Box Plugin Relay, is a standard SPDT plug‑in relay for VOLVO B‑series & D‑series excavators. Installed in the cabin fuse box, it switches high‑current power for lights, horn, refuel pump, wipers and pilot solenoids under V‑ECU (11381435) control. Replacing burnt, sticky or water‑damaged relays restores stable accessory operation and reliable circuit switching.
Core Technical Advantages
Silver‑Alloy Dual Contacts: AgSnO₂ arc‑resistant contacts prevent pitting, arcing and high‑resistance after millions of switching cycles.
Vibration‑Proof Flame‑Retardant Housing: High‑density polycarbonate shell dampens engine and chassis shock vibrations.
High‑Purity Copper Solenoid Coil: Delivers fast contact actuation even under low‑voltage cold‑start battery conditions.
Standard 5‑Pin Brass Terminals: High‑conductivity pins provide wobble‑free plug‑and‑play fit with OEM fuse board sockets.
Technical Specifications
| Engineering Parameter | Technical Data / Specification Details |
|---|
| Component Assembly Part Numbers | 20374662 / VOE 20374662 / 3171420 |
| Component Classification | Heavy‑Duty 5‑Pin SPDT Plug‑In Power Relay |
| Rated Voltage | 24V DC Heavy‑Duty Construction Machinery Accessory Circuits |
| Contact Material | Arc‑Resistant Silver‑Tin Oxide (AgSnO₂) |
| Housing Material | Sealed Flame‑Retardant Polycarbonate Composite |
| Mounting Type | Universal Plug‑and‑Play Blade Socket for Fuse Boards |
Master Application Fleet Guide
This 5‑pin power relay fits VOLVO B‑series & D‑series construction and mining excavators:
Compact Excavators: EC135B, EC140B, EC160B, EC180, EC200B
Mid‑Size Excavators: EC210B, EC240B, EC290B
Heavy Mining Excavators: EC330B, EC360B, EC380D, EC460B, EC480D, EC700B
Critical B2B Procurement & Maintenance Guidelines
B2B Procurement Strategy
Continuous thermal cycling, arcing and dust cause contact burning or relay failure, disabling lights, horn and other key accessories. Stock 20374662/3171420 in bulk for routine maintenance. Cross‑sell with dashboard display (14710109), battery switch (14714851) and battery relay (14529028) for complete cabin electrical overhaul.
Common Failure Symptoms
Accessory stays permanently on/off due to welded‑shut or burnt‑out relay contacts
No accessory operation caused by burned‑out solenoid coil from severe vibration fatigue
Intermittent circuit cut‑outs over rough terrain from loose pins or weakened internal springs
Best Practice Overhaul Advisory:
Disconnect main battery disconnect switch (14714851) before replacement to avoid ECU damage from voltage surges. Clean socket terminals with contact cleaner, install new relay fully seated, test stable accessory switching after power‑on.
Global Brand Cross‑Reference Matrix
| Brand | Cross‑Reference Part Numbers |
|---|
| VOLVO Genuine PN | 20374662 / VOE 20374662 |
| Factory Interchange | 3171420 |
| Component Group | 5‑Pin Plug‑In Power Relay / Central Fuse Box Mini Solenoid / SPDT Circuit Switch |
Commercial Inquiry & Global Logistics:Supplier: Xuzhou Sinoswift Import & Export Co., Ltd.
Contact: +86 13701956981
Email:
[email protected]Logistics: Global Sea Freight and Fast‑Track Industrial Express Ready
All manufacturer names and model designations are for compatibility reference only. These genuine 5‑pin power relays provide reliable circuit switching for global VOLVO construction, quarry and mining machinery fleets.
