EatonPKZM0-0,63Motor-Protective Circuit-Breaker – 3 Pole, 0.4-0.63 A Adjustable, Trip Class 10A, Phase-Failure Sensitive, IP20, 35 mm DIN Rail

Product Description

What this part is

Eaton PKZM0-0,63 motor-protective circuit-breaker, Eaton article number 072733. Frame: PKZM0. Number Of Poles: 3. Current Setting Range: 0.4 to 0.63 A, adjustable. Rated Operational Voltage (Ue): 690 V. Trip Class: 10 A. Degree of Protection: IP20. Terminal Type: Screw terminals, screw and snap fitting. Mounting Type: 35 mm top-hat rail to IEC/EN 60715, 7.5 or 15 mm rail height. Cap Installation Dimension: 45 mm. Touch Protection: Finger-safe to VDE 0106 part 100. Standards: IEC/EN 60947. Country of Origin: Germany.

Decoding the designation

PKZM is Eaton’s Moeller-series motor-protective circuit-breaker family and 0 is the smallest frame size in that range. The trailing 0,63 is the top of the adjustable current band, so this unit is set anywhere between 0.4 and 0.63 A on the dial. The current Eaton catalogue numbers for this device are XTPR63BC1 and XTPRP63BC1.

What these specs mean in practice

One device combines the manual disconnect, the adjustable thermal overload and a non-delayed magnetic short-circuit release, so a small motor branch circuit is protected and switched from a single unit. The 0.4 to 0.63 A band suits fractional-horsepower motors, small pumps, actuators and gear motors. The thermal element is phase-failure sensitive: if one phase is lost, current rises in the remaining two and the breaker trips, which protects a three-phase motor from single-phasing. Trip class 10 A sets the thermal trip time under locked-rotor current, the general-purpose class for motor starting. Finger-safe terminals to VDE 0106 part 100 and IP20 enclosure rating suit mounting inside a control panel with the door open for live testing.

Quantity and configuration

Unit Quantity: 1 Pc. One breaker ships. Carton and catalogue designations, all recorded as search terms: PKZM0-0,63, PKZM0-0.63, PKZM0063, PKZM0 0.63, XTPR63BC1, XTPRP63BC1, XTP RP 63 BC1, 072733.

Installation and setup notes

The body snaps onto a 35 mm top-hat rail of either 7.5 or 15 mm height and also accepts screw fixing. Cap installation dimension is 45 mm, which sets the depth clearance behind the panel front. The current dial is set to the motor’s full-load current within the 0.4 to 0.63 A band. The rotary handle switches all three poles and gives the visible off position.

Interchange guidance

Eaton XTPR63BC1 is the same device under the current catalogue number. A PKZM0-0,4 covers 0.25 to 0.4 A and a PKZM0-1 covers 0.63 to 1 A; both are related sizes in the same PKZM0 frame at a different current band. A PKZM0-0,63-SC, article 229831, is the same breaker with spring-cage terminals in place of screws.