4WE6J6X/EG12N9K40SO859

The 4WE6J6X/EG12N9K40SO859 directional spool valve is manufactured by Bosch Rexroth for the WE Directional Spool Valves series. It directs hydraulic flow in automated circuits that need fast, electrically controlled position changes. The solenoid uses a 12 V DC coil for compatibility with mobile equipment power rails, and a rated current of 2.5 A ensures the magnetic force required to shift the spool under full pressure. Coil power of 30 W defines the heat load that must be dissipated during continuous duty, while a duty cycle of 100 % ED lets the coil remain energized without cooling pauses. Voltage tolerance of ±10 % keeps the valve functional despite battery variations. The solenoid can open and close up to 4.2 times per second, setting a maximum switching frequency of 4.2 1/s in DC operation. To protect driver circuits, the design limits switch-off overvoltage to 500 V. The coil surface may reach 120 °C without damage, and electrical safety is classified under protection class III in accordance with VDE 0580, so only safety extra-low voltage is present.

The hydraulic body handles pressures and flow associated with medium-size actuators. Maximum operating pressure of 350 bar on ports A, B, and P allows use in high-pressure supply lines. Flow rates up to 80 l/min in DC operation give adequate volume for cylinders or motors and reduce cycle times. The tank port sustains 210 bar, so return line components must match this rating, while manual override can be used when tank pressure is below 50 bar to shift the spool during commissioning or power loss. An ingress protection rating of IP69K (K40) shields the solenoid against high-pressure water and dust, enabling outdoor mounting and frequent wash-down service; it also means the enclosure resists steam jet cleaning used in food or chemical industries. Interface geometry follows the ISO 4401-03-02-0-05 porting pattern, guaranteeing direct substitution into standard size 03 subplates and simplifying manifold assembly, and because the mounting surface is standardized, replacement valves require no rework of the base plate. These construction features coordinate hydraulic endurance with environmental durability for mobile or stationary automation tasks.