119802-77200 Relay (Yanmar R11EA Safety Relay)

The 119802-77200 is a dedicated 12V safety relay (R11EA) designed specifically for Yanmar engines. Its primary function is to provide overcurrent and short-circuit protection for the engine's ECU and control systems; it is compatible with equipment such as mini-excavators, forklifts, and generator sets. I. Core Parameters (Official Specifications)

Table

Parameter Item | Specification Details

Model | 119802-77200 (Aliases: R11EA, YM119802-77200)

Brand | Yanmar (Genuine OEM) / Domestic Aftermarket

Type | Safety Relay / Control Unit Protection Relay

Rated Voltage | 12V DC (Direct Current)

Contact Configuration | Single-Pole Double-Throw (SPDT)

Function | Overcurrent / Short-circuit protection; disconnects ECU / Ignition circuit

Pins | 4/5-Pin Plug-in Type (Compatible with OEM sockets)

HS Code | 8505908000 (Electromagnetic Relays)

II. Compatible Equipment & Models

Core Compatibility: Yanmar 4TNV94, 4TNV98, 3TNV70, 3TNV88 Series Engines

Excavators: XCMG 60, Liugong 906D, Sany 60, Sunward, Hitachi ZX14-3/16-3/18-3

Forklifts: Hyundai HDF20-5/25-5/30-5, Komatsu Forklifts

Others: Generator Sets, Light Construction Machinery, Agricultural Machinery

III. Replacements & Compatibility

Direct Replacement: R11EA, 11980277200, YM119802-77200 (Fully Interchangeable)

Selection Tips: Must be 12V; do not mix with 24V models. Prioritize aftermarket parts with identical pin assignments.

V. Installation & Maintenance Tips

Power Disconnection: Disconnect the negative terminal of the battery before replacement to prevent short circuits. 

Pin Matching: Wire according to the pin definitions of the original socket to ensure correct polarity for the coil and contacts. 

Troubleshooting: If the engine fails to start or the ECU triggers an alarm, prioritize checking the continuity and voltage of this relay. 

Environmental Protection: Keep away from high-temperature and oil-contaminated areas to prevent oxidation or burning of the contacts.