Bosch Rexroth | 4WE6H73A6XEG24N9K72LSO407
4WE6H73A6X/EG24N9K72LSO407
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The 4WE6H73A6X/EG24N9K72LSO407 directional spool valve is manufactured by Bosch Rexroth as part of the WE Directional Spool Valves series. It directs pressure and return lines in hydraulic automation circuits. The solenoid is rated for 24 V DC so standard control cabinets can drive it; the coil accepts a voltage deviation of ±10% to withstand supply variation. Continuous duty at 100 % ED allows the valve to remain energized without thermal cycling. Power draw is 8 W, keeping heat generation moderate during sustained operation. Class F insulation protects the coil windings against elevated temperature during such use. An M12x1 four-pin connector with an integrated diode (K72L) simplifies wiring and clamps inductive kickback, while the pinout of 4 for +24 VDC and 3 for ground clarifies terminal assignment. A concealed manual override tagged N9 is provided so technicians can shift the spool when electrical power is unavailable.
During operation the coil surface must stay below 85 °C, a limit that aligns with the chosen insulation class. The hydraulic section follows the ISO 4401-03-02-0-05 porting pattern so it fits standard subplates. Maximum flow in direct current operation is 60 l/min, giving adequate capacity for medium-size actuators. Ports A, B, and P can be pressurized up to 315 bar, while the tank port endures up to 210 bar, defining safe circuit limits. The enclosure is sealed to IP65 so dust and low-pressure water jets do not impair the electronics. Switch-off overvoltage is restricted to 500 V to protect drive electronics, and the K72L coil can cycle at up to one actuation per second, supporting moderate dynamic sequences in automated machines.
Technical Specifications
Duty Cycle
100% ED
Electrical Connection
M12x1 4-Pin With Diode (K72L)
Insulation Class (dc)
Class F
Ip Rating
IP65
Manual Override
Concealed (N9)
Max Coil Surface Temp (so407)
85 °C
Max Flow (dc, So407)
60 l/min
Max Operating Pressure (a/b/p)
315 bar
Max Switch-off Overvoltage
500 V
Max Switching Frequency (k72l)
1 1/s
Max Tank Port Pressure (dc)
210 bar
Nominal Power (so407)
8 W
Pinout (k72l)
4=+24 VDC, 3=GND
Porting Pattern
ISO 4401-03-02-0-05
Rated Voltage
24 V DC
Voltage Tolerance
±10%
1620 Old Apex Road
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