PKZM4-50
222355 PKZM4-50
222355

Motor-protective circuit-breaker, Ir= 40 - 50 A, Screw terminals, Terminations: IP00
Motor-protective circuit-breaker according to IEC/EN60947, 3 pole size PKZM4, with adjustable overload and non-delayed short-circuit release, phase failure sensitive, screw and snap fitting, rated operating voltage Ue 690V, degree of protection IP20, finger proof according to VDE 0106 T. 100, accessories: auxiliary contact, voltage release

Product range	PKZM4 motor protective circuit-breakers up to 65 A
Basic function	Motor protection
Notes
Connection technique	Also suitable for motors with efficiency class IE3. IE3-ready devices are identified by the logo on their packaging.
Contact sequence	Screw terminals
AC-3 >220 V 230 V 240 V [P]
AC-3 >380 V 400 V 415 V [P]
AC-3 >440 V [P]	14 kW
AC-3 >500 V [P]	25 kW
AC-3 >660 V 690 V [P]	30 kW
Rated uninterrupted current [Iu]	30 kW
Overload releases [Ir ]	45 kW
short-circuit release [Irm ] >max. [Irm ]	50 A
Phase-failure sensitivity
Explosion protection (according to ATEX 94/9/EC)	40 - 50 A
Notes	775 A
Standards	IEC/EN 60947-4-1, VDE 0660 Part 102
Climatic proofing	 PTB 10, ATEX 3012, Ex II(2) G Observe manual MN03402002Z-DE/EN.
Ambient temperature >Storage	Overload trigger: tripping class 10 A Can be snapped on to IEC/EN 60715 top-hat rail with 7.5 or 15 mm height.
Ambient temperature >Open
Ambient temperature >Enclosed	IEC/EN 60947, VDE 0660,UL, CSA
Mounting position	Damp heat, constant, to IEC 60068-2-78 Damp heat, cyclic, to IEC 60068-2-30
Direction of incoming supply	- 40 - 80 °C
Degree of protection >Device	-25 - +55 °C
Degree of protection >Terminations	- 25 - 40 °C
Protection against direct contact when actuated from front (EN 50274)
Mechanical shock resistance half-sinusoidal shock 10 ms to IEC 60068-2-27	as required
Altitude	IP20
Terminal capacity main cable >Screw terminals >Solid	IP00
Terminal capacity main cable >Screw terminals >Flexible with ferrule to DIN 46228	Finger and back-of-hand proof
Terminal capacity main cable >Screw terminals >Solid or stranded	15 g
Terminal capacity main cable >Screw terminals >Stripping length	Max. 2000 m
Specified tightening torque for terminal screws >Main cable	1 x (1 - 50) 2 x (1 - 35) mm2
Rated impulse withstand voltage [Uimp]	1 x (1 - 35) 2 x (1 - 35) mm2
Overvoltage category/pollution degree	14 - 2 AWG
Rated operational voltage [Ue ]	14 mm
Rated uninterrupted current = rated operational current [Iu = Ie ]	3.3 Nm
Rated frequency [f]
Current heat loss (3 pole at operating temperature)	6000 V AC
Impedance per pole	III/3
Lifespan, mechanical [Operations]	690 V AC
Lifespan, electrical (AC-3 at 400 V) >Lifespan, electrical [Operations]	50 A
Max. operating frequency	40 - 60 Hz
Short-circuit rating >DC >Short-circuit rating	24.6 W
Short-circuit rating >DC >Notes	3 mΩ
Motor switching capacity >AC-3 (up to 690V)	0.03 x 106
Motor switching capacity >DC-5 (up to 250V)	0.03 x 106
Temperature compensation >to IEC/EN 60947, VDE 0660	40 Ops/h
Temperature compensation >Operating range	60 kA
Temperature compensation residual error for T > 40 °C	up to 250 V
Setting range of overload releases	50 A
short-circuit release	50 (3 contacts in series) A
Short-circuit release tolerance
Phase-failure sensitivity	- 5…40 °C
Switching capacity >Maximum motor rating >Three-phase >230 V 240 V	- 25…55 °C
Switching capacity >Maximum motor rating >Three-phase >460 V 480 V	≦ 0.25 %/K
Switching capacity >Maximum motor rating >Three-phase >575 V 600 V	0.6 - 1 x Iu
Short Circuit Current Rating, type E >240 V	Basic device, fixed: 15.5 x Iu
Short Circuit Current Rating, type E >480 Y / 277 V	± 20%
Short Circuit Current Rating, type E >Accessories required	IEC/EN 60947-4-1, VDE 0660 Part 102
Short Circuit Current Rating, group protection >600 V High Fault >SCCR (fuse)
Short Circuit Current Rating, group protection >600 V High Fault >max. Fuse	15 HP
Short Circuit Current Rating, group protection >600 V High Fault >SCCR (CB)	30 HP
Short Circuit Current Rating, group protection >600 V High Fault >max. CB	40 HP
Rated operational current for specified heat dissipation [In]	50 kA
Heat dissipation per pole, current-dependent [Pvid]	50 kA
Equipment heat dissipation, current-dependent [Pvid]	BK50/3-PKZ4-E
Static heat dissipation, non-current-dependent [Pvs]	42 kA
Heat dissipation capacity [Pdiss]	600 A
Operating ambient temperature min.	42 kA
Operating ambient temperature max.	600 A
10.2 Strength of materials and parts >10.2.2 Corrosion resistance
10.2 Strength of materials and parts >10.2.3.1 Verification of thermal stability of enclosures	50 A
10.2 Strength of materials and parts >10.2.3.2 Verification of resistance of insulating materials to normal heat	8.2 W
10.2 Strength of materials and parts >10.2.3.3 Verification of resistance of insulating materials to abnormal heat and fire due to internal electric effects	24.6 W
10.2 Strength of materials and parts >10.2.4 Resistance to ultra-violet (UV) radiation	0 W
10.2 Strength of materials and parts >10.2.5 Lifting	0 W
10.2 Strength of materials and parts >10.2.6 Mechanical impact	-25 °C
10.2 Strength of materials and parts >10.2.7 Inscriptions	+55 °C
10.3 Degree of protection of ASSEMBLIES
10.4 Clearances and creepage distances	Meets the product standard´s requirements.
10.5 Protection against electric shock	Meets the product standard´s requirements.
10.6 Incorporation of switching devices and components	Meets the product standard´s requirements.
10.7 Internal electrical circuits and connections	Meets the product standard´s requirements.
10.8 Connections for external conductors	Meets the product standard´s requirements.
10.9 Insulation properties >10.9.2 Power-frequency electric strength	Does not apply, since the entire switchgear needs to be evaluated.
10.9 Insulation properties >10.9.3 Impulse withstand voltage	Does not apply, since the entire switchgear needs to be evaluated.
10.9 Insulation properties >10.9.4 Testing of enclosures made of insulating material	Meets the product standard´s requirements.
10.10 Temperature rise	Does not apply, since the entire switchgear needs to be evaluated.
10.11 Short-circuit rating	Meets the product standard´s requirements.
10.12 Electromagnetic compatibility	Does not apply, since the entire switchgear needs to be evaluated.
10.13 Mechanical function	Does not apply, since the entire switchgear needs to be evaluated.
Overload release current setting	Is the panel builder´s responsibility.
Adjustment range undelayed short-circuit release	Is the panel builder´s responsibility.
With thermal protection	Is the panel builder´s responsibility.
Phase failure sensitive	Is the panel builder´s responsibility.
Switch off technique	Is the panel builder´s responsibility.
Rated operating voltage	The panel builder is responsible for the temperature rise calculation. Eaton will provide heat dissipation data for the devices.
Rated permanent current Iu	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
Rated operation power at AC-3, 230 V	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
Rated operation power at AC-3, 400 V	The device meets the requirements, provided the information in the instruction leaflet (IL) is observed.
Type of electrical connection of main circuit
Type of control element
Device construction	40 - 50 A
With integrated auxiliary switch	775 - 775 A
With integrated under voltage release	Yes
Number of poles	Yes
Rated short-circuit breaking capacity lcu at 400 V, AC	Thermomagnetic
Degree of protection (IP)	690 - 690 V
Height	50 A
Width	14 kW
Depth	25 kW
Product Standards	Screw connection
UL File No.	Turn button
UL Category Control No.	Built-in device fixed built-in technique
CSA File No.	No
CSA Class No.	No
North America Certification	3
Specially designed for North America	50 kA
Suitable for	IP20
Accessories	140 mm
Characteristic curve	55 mm
Characteristic curve	160 mm
Characteristic curve	IEC/EN 60947-4-1; UL 60947-4-1; CSA - C22.2 No. 60947-4-1-14; CE marking

As Mnelko, we are a reliable partner in industrial automation solutions, offering high-quality and innovative products with a wide product range to meet all the needs of your business. Our product portfolio consists of solutions designed based on the principles of high performance, durability, and efficiency to support modern industrial processes.
All of our products ensure maximum reliability even in challenging working conditions and help your business operations run smoothly. The products we offer in industrial automation, energy management, cabling solutions, and many other areas adapt flexibly to the needs of different sectors.
Additionally, our products are manufactured using only high-quality materials and comply with international standards. Through the solutions we provide, we enable our customers to increase operational efficiency and optimize costs. Our company closely follows technological advancements and continuously offers innovative products to help our customers gain a competitive advantage.
On each of our product pages, you can find comprehensive information about technical details, areas of use, and product features. You can explore all the products you need to strengthen your industrial processes on our website and enjoy a seamless purchasing experience.