Definition and class
The Delta VFD007CB21A-20 is an economy-class vector-control AC drive from the C200 series, sized for a 0.75 kW / 1 HP motor on a 230 V single-phase supply — the '007' segment of the part code denotes that 1 HP rating and the '21' segment the 230 V 1-phase input. It is wall-mounted in the 'A' mechanical version and rated IP20 / UL open type, which means the chassis is intended for installation inside a sealed enclosure rather than exposed to washdown or dust-laden areas. Within Delta's VFD line this unit sits in the economy tier: it covers the four common induction-motor control methods — V/F, sensorless vector (SVC), V/F with encoder feedback, and field-oriented control with encoder — so the same drive body can be applied to constant-torque loads such as conveyors and mixers or to quadratic-torque loads such as fans and pumps without a platform change. The maximum output frequency is 600.00 Hz in normal duty and 300.00 Hz in heavy duty, giving the drive the headroom needed for high-speed spindle or specialty process applications while still allowing a derated ceiling when the load demands full torque.
Ratings and what they mean for sizing
The 0.75 kW / 1 HP rating is paired with a 12 A input current draw on the single-phase 230 V side, which is the figure that drives branch-circuit protection and wire sizing upstream of the drive — not the motor nameplate current, which sits downstream of the rectifier. The drive delivers up to 200% torque current at the limit, meaning it can produce a transient boost twice the rated current to overcome load inertia on start or to clear a stall without tripping.
Sourcing and lifecycle read
Lifecycle is recorded as current production on the part record, with no official successor or cross-reference on file, and standard delivery is in the 1–10 working-day band once a quote is confirmed. Quoting runs against the BOM line for production volumes; current pricing and unit availability are confirmed at RFQ rather than carried as published numbers. The closest functional siblings on the same C200 platform are the 0.4 kW / 0.5 HP single-phase unit, the 3.7 kW / 5 HP three-phase 230 V unit, and the 4.0 kW / 5.5 HP three-phase 460 V unit — sharing form factor, control set, and IP rating so panel layout and parameter structure carry across the power range without a learning curve.
Drop-in fit with a peer
A panel originally specified around the 0.4 kW / 0.5 HP peer is a near-neighbour in the same series, but it draws 7.2 A on a 230 V three-phase feed versus this drive's 12 A on a 230 V single-phase feed — the upstream breaker, contactor, and wire gauge sized for the lower-rated unit will not necessarily satisfy the larger drive, even though the chassis footprint and mounting match.