IEC 61020-1:2009

FOREWORD
INTRODUCTION
1 Scope and object
  1.1 Scope
  1.2 Object
2 General
  2.1 Normative references
  2.2 Units and symbols
  2.3 Terms and definitions
  2.4 Preferred values
       2.4.1 Clearance and creepage distances
  2.5 Marking
3 Quality assessment procedures
4 Test and measurement procedures
  4.1 General
       4.1.1 Tolerances
       4.1.2 Preconditioning
       4.1.3 Mounting
  4.2 Standard atmospheric conditions
  4.3 General examination
       4.3.1 Visual examination
       4.3.2 Dimensions
       4.3.3 Dimensions, gauging
       4.3.4 Mass
       4.3.5 Functional operation
       4.3.6 Operating characteristics
       4.3.7 Contact bounce
  4.4 Resistance measurements
       4.4.1 Contact resistance - Millivolt level
       4.4.2 Contact resistance - Specified current
       4.4.3 Resistance from actuator to mounting bushing
              (surface)
       4.4.4 Insulation resistance
  4.5 Dielectric strength
       4.5.1 Dielectric strength at standard atmospheric
              conditions
       4.5.2 Dielectric strength at low air pressure
  4.6 Heating
       4.6.1 Object
       4.6.2 Method
       4.6.3 Requirement
       4.6.4 Details to be specified
  4.7 Dynamic stress
       4.7.1 Shock
       4.7.2 Vibration
       4.7.3 Contact disturbance
  4.8 Mechanical strength
       4.8.1 Robustness of actuator
       4.8.2 Robustness of mounting bushing
       4.8.3 Robustness of screw mounting
       4.8.4 Robustness of terminations
  4.9 Mechanical endurance
       4.9.1 Mechanical endurance - Standard atmospheric
              conditions
       4.9.2 Mechanical endurance - Category temperature range
  4.10 Electrical endurance
       4.10.1 Electrical endurance - Standard atmospheric
              conditions
       4.10.2 Electrical endurance - Upper category temperature
       4.10.3 Electrical endurance - Category temperature range
       4.10.4 Electrical endurance - Low air pressure
       4.10.5 Logic loads (TTL)
       4.10.6 Low level endurance test
  4.11 Overload
       4.11.2 Electrical overload
       4.11.3 Capacitive load switching
  4.12 Environmental testing
       4.12.1 Climatic sequence
       4.12.2 Damp heat, steady state
       4.12.3 Rapid change of temperature
       4.12.4 Mould growth (resistance)
       4.12.5 Corrosion, industrial atmosphere
       4.12.6 Dust and sand
       4.12.7 Contact resistance stability
  4.13 Soldering
       4.13.1 Solderability, wetting, solder bath method
       4.13.2 Solderability, wetting, soldering iron method
       4.13.3 Solderability, de-wetting
       4.13.4 Resistance to soldering heat, solder bath method
       4.13.5 Resistance to soldering heat, soldering iron
              method
  4.14 Panel seal
       4.14.1 Drip - Proof
       4.14.2 Splash - Proof
       4.14.3 Immersion
       4.14.4 Submersion
  4.15 Enclosure seal
       4.15.1 Watertight immersion
       4.15.2 Resilient or hermetic seal
  4.16 Fluid resistance
       4.16.1 Immersion in cleaning solvents (marking)
  4.17 Fire hazard
  4.18 Capacitance
       4.18.1 Object
       4.18.2 Method
       4.18.3 Requirement
       4.18.4 Details to be specified
  4.19 Illumination
       4.19.1 Chromaticity
       4.19.2 Transmittancy
       4.19.3 Temperature of illuminated surface
  4.20 Soldering for surface mounting switches
       4.20.1 Solderability, solder bath method (surface
              mounting switches)
       4.20.2 Solderability, reflow method (surface mounting
              switches)
       4.20.3 Solderability, soldering iron method (surface
              mounting switches)
       4.20.4 Resistance to soldering heat, solder bath
              method (surface mounting switches)
       4.20.5 Resistance to soldering heat, reflow method
              (surface mounting switches)
       4.20.6 Resistance to soldering heat, soldering iron
              method (surface mounting switches)
  4.21 Mechanical strength (surface mounting switches)
       4.21.1 Substrate bending (surface mounting switches)
       4.21.2 Pull-off and push-off (surface mounting switches)
       4.21.3 Shear (surface mounting switches)
       4.21.4 Body strength (surface mounting switches)
Annex A (informative) - Quality assurance procedures
Bibliography

IEC 61020-1:2009 provides consistency in detail specifications for electromechanical switches by specifying the terminology, symbols, test methods and other necessary information. Switches covered by this specification:
- are devices which open, close, or change the connection of a circuit by the mechanical motion of conducting parts (contacts);
- have a maximum rated voltage of 480 V;
- have a maximum rated current of 63 A.
This second edition constitutes a technical revision and includes the following significant technical changes with respect to the previous edition:
- The requirements of the IEC 60512 series of standards have been integrated.
- Other necessary information concerning switches as specified in IEC 60512 have been implemented.
The following items have been updated with respect to the first edition:
- test methods were reviewed for detailed description;
- the explanation for the test method of the operating force was rewritten in more detail;
- the test voltage for measurement for contact bounce was reviewed;
- the electrical endurance "ON" duration in the duty cycle was harmonized with IEC 61058;
- the requirements for fire hazards have been deleted;
- testing methods of surface mounting switches based on the Japanese industrial standard were added.