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All Categories > Electrical Contactors & Starters > Manual Motor Starters > Manual Motor Starter Type GMK > Item # GMKO-A  
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Item # GMKO-A, Manual Motor Starter Type GMK

End User Price $116.64


  • Motor protection circuit breaker up to 32 amps
  • Manual operation using start-stop push buttons
  • All poles open for both thermal and magnetic trips
  • Class 10 overload protection
  • Ambient temperature compensation between -5ºC and +40ºC.
  • Easy Din Rail mounting or panel mounting with screws
  • UL listed, CSA approved and meets international standards

Specifications  · UL Requirements  · General Information  · Main Circuit  · Tripping Characteristics


Motor Full Load Current Range Min.

0.10 A

Motor Full Load Current Range Max.

0.16 A

Magnetic Tripping Current Ampere

1.9 A

Power Poles - N.O.


List Price 


UL Requirements

Individual Motor Class K5 Max. Fuse Ampere

15 A

Group Fusing Max. Fuse Ampere

100 A

General Information

Conformity to Standards

IEC 947-2, IEC 947-4-1, VDE 0660



Ith - Rated Thermal Current at 40°C

25 A

Ui - Rated Insulation Voltage

690 V

Ue - Rated Operational Voltage AC at 40/60 Hz

690 V

Ue - Rated Operational Voltage DC1

220 V

Terminal Type

M4, Pozidriv, safety flange screws

Wiring Capacity - Rigid Wire Min.

2 wires of 0.75 mm2

Wiring Capacity - Rigid Wire Max.

2 wires of 6 mm2

Wiring Capacity - Flexible Wire Min.

2 wires of 0.75 mm2

Wiring Capacity - Flexible Wire Max.

2 wires of 4 mm2
1 With or without earth connection

Main Circuit


AC3, DC4

Frequency Limits

40-60 Hz

Opening Time

7 ms

Mechanical Endurance


Electrical Endurance Category AC3


Maximum Operating Rate

40 operations/h

Total Dissipated Power at Rated Thermal Current and Hot State

6.00 W

Tripping Characteristics

Thermal Symmetrical Overloads1

Class 10

Thermal Asymmetrical Overloads - phase failure2

To IEC 947-4-1

Thermal Temperature Compensation

-5 to +40 ºC


12 x Max. Thermal Setting value

Stunt Release Operating Voltage limits

0.7 - 1.2 Ue 100% ED

Stunt Release Consumption AC

2.2 VA

Stunt Release Consumption DC

1 W

Undervoltage Release Operational Voltages Limits

0.85 - 1.1 Ue 100% ED

Undervoltage Release Breaking Voltage Limits

0.75 - 0.35 Ue

Undervoltage Release Consumption

2.2 VA
1 see curve 1, tripping curve
2 see curve 2, tripping curve


·  Tripping Curve

·  Wiring Diagram


Manual Motor Starter - Wiring Diagrams
(PDF, 190KB)