MoellerPKZM0-20Motor-Protective Circuit-Breaker – 3 Pole, 16-20 A Adjustable, 280 A Magnetic Trip, 10 kA at 600 V AC, Trip Class 10A, IP20, DIN Rail

Product Description

What this part is

Moeller PKZM0-20 motor-protective circuit-breaker, now an Eaton product under article number 046988. Frame: PKZM0. Number Of Poles: 3. Current Setting Range: 16 to 20 A, adjustable. Magnetic Trip Response: 280 A. Short-Circuit Breaking Capacity: 10 kA at 600 V AC. Rated Operational Voltage (Ue): 690 V. Motor Rating: 9 kW at 400 V. Trip Class: 10 A. Degree of Protection: IP20. Terminal Type: Screw connection. Mounting Type: DIN rail or panel. Standards: IEC/EN 60947-4-1, VDE 0660 part 102. Country of Origin: Germany. Condition: new, supplied without the original carton.

Decoding the designation

PKZM is Moeller’s motor-protective circuit-breaker family and 0 is the frame size, the smallest in the range. The trailing 20 is the top of the adjustable current range, so a PKZM0-20 is set anywhere between 16 and 20 A on the dial. The current Eaton catalogue number for the same device is XTPR020BC1.

What these specs mean in practice

One device combines the disconnect, the adjustable thermal overload and the instantaneous magnetic short-circuit release, so a motor branch circuit is protected and switched from a single unit. The thermal element is phase-failure sensitive: loss of one phase raises current 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 for a locked-rotor current, which suits general-purpose motor starting. The 280 A magnetic release clears a short circuit without waiting on the thermal element. Icu of 10 kA at 600 V AC sets the fault level the device interrupts on its own. IP20 and finger-safe terminals suit mounting inside an enclosure or control panel.

Quantity and configuration

Unit Quantity: 1 Pc. One breaker ships. Carton and catalogue designations, all recorded as search terms: PKZM0-20, PKZM020, PKZM0 20, PKZMO 20, PKZM0-20 046988, XTPR020BC1.

Installation and setup notes

The body snaps onto a 35 mm top-hat rail to IEC/EN 60715 and also accepts screw fixing to a panel. Line and load terminals are screw type. The current dial is set to the motor’s full-load current within the 16 to 20 A band. The rotary handle switches the poles and gives the visible off position.

Interchange guidance

Eaton XTPR020BC1 is the same device under the current catalogue number. A PKZM0-16 covers 10 to 16 A and a PKZM0-25 covers 20 to 25 A; both are related sizes in the same PKZM0 frame at a different current band. A PKZM0-20/AK, article 265343, is the same breaker with a lockable thumb-grip handle.