R912005707 Variable Frequency Drive EFC 3610 4.0kW 3-ф/380

Bosch Rexroth EFC 3610 4.0 kW (part R912005707, EFC3610-4K00-3P4) is a three-phase frequency converter. Supply 3×380 V (380…480 V), 3-phase output up to mains voltage. Rated current 9.7 A, frequency 0…400 Hz, 150% overload for 60 s and 200% for 1 s.

Control is V/f only, with no vector loop; PID, S-curve ramps and DC braking. A built-in brake chopper (external resistor) and an integrated EMC filter are included. Modbus RTU is standard. IP20, cabinet mount.

A working choice for pumps, fans and machines. An in-stock option with broader functionality is the Veichi AC310.

Bosch Rexroth EFC 3610 frequency converters

The EFC 3610 is the economy line of the Bosch Rexroth EFC x610 family, built for straightforward speed-control tasks where a vector loop is not required. Per the manufacturer datasheet, the control method here is V/f only: linear, quadratic and freely definable V/f curves. If you need sensorless vector control with higher starting torque, that is the higher EFC 5610 line; the EFC 3610 is deliberately simpler and lower-cost.

Power range: 0.4 kW to 22 kW. Single-phase models run on 1×220 V (200…240 V) and output 3-phase 220 V — the classic "single-phase mains to three-phase motor" case. Three-phase models run on 3×380 V (380…480 V). Output frequency is 0…400 Hz, with 150% overload for 60 s and 200% for 1 s (HD mode).

What is built in

• Brake chopper — built in across the full range up to 22 kW inclusive. The datasheet confirms it: "Brake chopper — internal up to 22 kW." The braking resistor is external and is selected separately for the inertia and braking duty.
• Built-in mains (EMC) filter. Bosch Rexroth markets the EFC x610 as having an "integrated brake chopper and mains filter."
• Integrated operator panel for fast commissioning, PID controller, S-curve ramps, DC braking.

I/O and communication

Standard: 5 digital inputs (one is a pulse input up to 50 kHz), 1 digital output, 1 relay output, 2 analog inputs (0…10 V / 0…20 mA) and 1 analog output. Modbus RTU is standard. PROFIBUS, CANopen and Multi-Ethernet (Modbus TCP / EtherCAT) are added via external option modules. There is no built-in PLC — only an "integrated step switching mechanism" (fixed speeds), not full PLC logic.

Where the EFC 3610 fits

Pumps, fans, conveyors and simple machines — anywhere V/f control is enough. IP20 protection, cabinet mount. The line is discontinued by Bosch Rexroth, so availability should be confirmed per part number.

If you are choosing a replacement or a new drive for the same duty, consider our Veichi series: AC10 (compact V/f for pumps and fans), AC310 (general-purpose with vector control and built-in PLC for more complex cycles) and AC01. They cover the same power range with faster stock availability.