Product Description:

The 131B0938 is an AC variable frequency drive manufactured by Danfoss within the VLT FC 301 Automation Drives series. It modulates the frequency and amplitude of a three-phase supply so connected induction motors can be started smoothly, accelerated under load, and held at programmed speeds without mechanical throttling. The product integrates power electronics, control logic, and protective monitoring in a compact housing suited for conveyors, pumps, and general motion axes in automated production lines.

The drive handles an apparent power of 2.1 kVA at 400 V, establishing the feeder rating required for safe operation. Its motor terminals can deliver up to 3 A of continuous output current, while the input side draws 2.7 A from a 380–480 V AC network. Overall conversion efficiency reaches 0.96, meaning only 4% of the input energy is dissipated as heat, with a thermal loss of 58 W. The plastic housing has an IP20 ingress protection rating, making the drive suitable for installation inside a control cabinet that provides additional protection. An internal Class A1/B1 RFI filter limits conducted emissions. No brake chopper is fitted, so an external dynamic braking resistor cannot be connected directly to the drive.

The enclosure has a depth of 205 mm, a height of 341 mm, and a width of 90 mm. These dimensions correspond to frame size A2, allowing clearance and wiring routes to match VLT modules with comparable output ratings. The aluminum heat sink and molded cover bring the total mass to 4.9 kg, allowing the unit to be handled by one person during maintenance. Rated motor power is 1.1 kW, which is suitable for small pumps, fans, or conveyors that require variable-speed operation without oversized feeders. Input, output, and control terminals are arranged at the base of the enclosure. Applications requiring fast stops must use drive-controlled ramp-down or mechanical holding methods.