Eaton PKZM0-1,6/AK Motor-Protective Circuit Breaker

Overview

The Eaton PKZM0-1,6/AK is a compact motor-protective circuit breaker from Eaton’s Moeller series PKZM0 range, purpose-built to protect three-phase motor circuits from overload and short-circuit conditions in a single DIN-rail-mounted device. Covering an adjustable overload trip range of 1–1.6 A, the PKZM0-1,6/AK combines a thermal overload release, a magnetic short-circuit release, and a manual ON/OFF/TRIP operating mechanism into one compact housing, replacing the separate motor starter, overload relay, and fuse combination traditionally used to protect small motor circuits.

In Oman and the GCC, Seven Star LLC proudly supplies the Eaton PKZM0-1,6/AK to panel builders, OEM machine builders, and industrial maintenance teams across the Sultanate of Oman and the wider GCC. Seven Star LLC supplies the Eaton PKZM0-1,6/AK on request with the manufacturer datasheet, and lead time and availability are confirmed at quotation.

Operating Principle

The Eaton PKZM0-1,6/AK protects a motor circuit through two independent trip mechanisms working in tandem. A bimetallic thermal overload release continuously monitors the current drawn by the connected motor and trips the breaker’s contacts open when sustained current exceeds the user-set threshold within the 1–1.6 A adjustment range, protecting the motor winding from thermal damage caused by mechanical overload, single-phasing, or a stalled rotor. A separate magnetic short-circuit release instantaneously trips the breaker on a sudden current surge, isolating the circuit within milliseconds of a genuine short-circuit fault and limiting let-through energy to protect downstream cabling and contactors.

Because the Eaton PKZM0-1,6/AK combines both protection functions and manual switching in one device, the consequences for the installer are direct: no separate fuses to size and stock, no coordination study needed between an upstream fuse and a downstream overload relay, and a single rotary handle that provides local lockable isolation, ON/OFF switching, and clear trip-flag indication when the breaker has opened on a fault, dramatically simplifying maintenance troubleshooting on the plant floor.

Engineering Design of the Eaton PKZM0-1,6/AK

Physically, the Eaton PKZM0-1,6/AK is housed in a compact 45 mm wide, DIN-rail-mounted enclosure that snaps directly onto standard IEC/EN 60715 top-hat rail, with a footprint small enough to fit multiple units side-by-side in a compact motor-control panel. The rotary operating handle on the front face is finger-and-back-of-hand-proof by design, meeting the touch-safety requirements expected on panels accessed by maintenance personnel, and the trip-free mechanism ensures the breaker cannot be held closed against a genuine overload or short-circuit condition.

The line-side and load-side terminals accept screw connections rated for the adjustable current range, and the device is designed to accept optional accessory modules including auxiliary contacts, undervoltage releases, and the +AK-PKZ0 adapter kit for direct mechanical and electrical combination with an Eaton DIL-series contactor to form a complete direct-on-line starter. This modular accessory system means a single Eaton PKZM0-1,6/AK base unit can be configured for manual motor protection alone, or expanded into a full motor starter combination without changing the base breaker.

Key Features

The Eaton PKZM0-1,6/AK combines reliable motor protection with compact panel-space economy. Key features include:

• Adjustable thermal overload trip range of 1–1.6 A, precisely matched to small three-phase motor full-load currents.
• Integrated magnetic short-circuit release rated for a breaking capacity of up to 150 kA at 400–690 V AC.
• Compact 45 mm DIN-rail-mounted housing suitable for IEC/EN 60715 top-hat rail, 7.5 or 15 mm height.
• Rated operational voltage of 690 V AC and rated frequency of 50/60 Hz for global and GCC grid compatibility.
• Trip-free rotary handle mechanism with clear ON/OFF/TRIP indication for fast fault diagnosis.
• Finger and back-of-hand-proof terminal design for safe operation in accessible panel locations.
• Compatible with the +AK-PKZ0 adapter for direct combination with Eaton DIL-series contactors into a full motor starter.
• Three-pole switching with a compact 76 mm x 93 mm x 45 mm footprint and light 0.287 kg weight.

Industrial Applications

The Eaton PKZM0-1,6/AK is widely specified for protecting small auxiliary motors, pump sets, conveyor drive motors, fan motors, and compressor circuits across light and heavy industrial facilities. In the GCC region, where district cooling plants, RO desalination skids, and food and beverage processing lines rely on large populations of small and medium three-phase motors, the PKZM0-1,6/AK provides a cost-effective, space-saving way to protect each individual motor circuit without the panel space and coordination overhead of a fuse-plus-overload-relay approach.

In Oman and the GCC, Seven Star LLC distributes the PKZM0-1,6/AK to system integrators and panel builders serving hospitality developments, hospital complexes, and industrial zones such as the Sohar and Salalah economic free zones, where dependable Eaton parts are essential to keeping motor-driven utility systems running with minimal downtime. Seven Star LLC’s regional warehouse presence means a replacement PKZM0-1,6/AK unit can reach a GCC facility far faster than importing directly from Europe.

Technical Specifications

The table below summarizes the principal specifications for the Eaton PKZM0-1,6/AK motor-protective circuit breaker.

Request a Quote for Eaton PKZM0-1

Panel builders, maintenance engineers, and procurement teams in Oman and across the GCC can request a formal RFQ for the Eaton PKZM0-1,6/AK directly from Seven Star LLC’s instrumentation and switchgear division. In Oman and the GCC, Seven Star LLC supplies on request with lead time confirmed at quotation, provides the full technical datasheet for engineering review, and offers application support for selecting the correct overload range and starter-combination accessories for your specific motor. Contact Seven Star LLC today for a quotation on the Eaton PKZM0-1,6/AK motor-protective circuit breaker, with local technical support.

Also available: Eaton NZMN1-A80 Molded Case Circuit Breaker