The Mitsubishi FR-A740-00090-NA is a variable frequency inverter drive engineered for AC motor control in demanding industrial applications. This FR-A700 series unit delivers 3.75 kW (5 HP) continuous output with overload capacity to 7.5 HP at 110% and 5 HP at 150%, enabling flexible motor management across velocity, torque, and positioning control modes. Operating from 380–480 VAC three-phase input, it produces 460 VAC output across a 0.2–400 Hz frequency range with real sensorless vector torque control, zero-speed holding capability, and adaptive auto-tuning for load inertia compensation. The drive achieves response speeds up to 300 rad/s and supports a 200:1 open-loop speed range. Onboard PLC functionality, integrated brake transistor circuitry, and power-down braking provide advanced process control and safety features. Communication options include a removable FR-DU07 control unit with digital dial, optional FR-PU07-01 remote keypad, USB connectivity for FR-Configurator Software configuration, and remote I/O capability for networked monitoring. An integral radio filter suppresses noise emissions per EU Directive across all drive sizes. The unit weighs 8.34 lbs and carries UL listing for single-phase input operation. This model has been discontinued by the manufacturer.
Technical Specifications
• Model: FR-A740-00090-NA
• Series: FR-A700 (successor to A500(L))
• Input: 380–480 VAC, 3-phase, 50/60 Hz
• Output: 460 VAC, 0.2–400 Hz
• Power Rating: 3.75 kW (5 HP) continuous; 7.5 HP @ 110% overload; 5 HP @ 150% overload
• Rated Current: 9 A (nominal); 12.6 A @ 110% overload; 9 A @ 150% overload
• Weight: 8.34 lbs
• Response Speed: Up to 300 rad/s
• Speed Range: 200:1 open-loop operation
– Key Features
• Real sensorless vector torque control with zero-speed holding (encoder-free)
• Adaptive auto-tuning for load inertia variation compensation
• Velocity, torque, and positioning control modes
• Integrated PLC programmability for complex sequences
• Dual braking: power-down braking and integrated brake transistor circuit (up to 30 HP)
• Integral radio filter for EU Directive compliance
– Connectivity & Control
• Removable FR-DU07 control unit with digital dial
• Optional FR-PU07-01 remote keypad (HAND/AUTO, three-parameter monitoring)
• USB port for FR-Configurator Software
• Remote I/O for network-based control and monitoring
– Typical Applications
Precision motor drive systems requiring sensorless vector control, variable-speed pump and fan regulation, textile machinery, material handling, and process automation where torque holding and dynamic response are critical.
