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eLibrary > BS EN IEC 61051-1:2018 Varistors for use in electronic equipment - Generic specification >

BS EN IEC 61051-1:2018 Varistors for use in electronic equipment - Generic specification, 2018

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BS EN IEC 61051-1:2018 Varistors for use in electronic equipment - Generic specification, 2018

undefined [Go to Page]
Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
English [Go to Page]
CONTENTS
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Technical data [Go to Page]
4.1 Units, symbols and terminology
4.2 Preferred values and characteristics
4.3 Marking [Go to Page]
4.3.1 General
4.3.2 Coding
5 Quality assessment procedures [Go to Page]
5.1 General [Go to Page]
5.1.1 Overview
5.1.2 Applicability of qualification approval
5.1.3 Applicability of capability approval
5.1.4 Applicability of technology approval
5.2 Primary stage of manufacture
5.3 Subcontracting
5.4 Structurally similar components
5.5 Qualification approval procedures [Go to Page]
5.5.1 Eligibility for qualification approval
5.5.2 Application for qualification approval
5.5.3 Test procedure for qualification approval
5.5.4 Granting of qualification approval
5.5.5 Maintenance of qualification approval
5.5.6 Quality conformance inspection
5.6 Capability approval procedures [Go to Page]
5.6.1 General
5.6.2 Eligibility for capability approval
5.6.3 Application for capability approval
5.6.4 Description of capability
Figures [Go to Page]
Figure 1 – General scheme for capability approval [Go to Page]
5.6.5 Demonstration and verification of capability
5.6.6 Programme for capability approval
5.6.7 Capability approval test report
5.6.8 Abstract of description of capability
5.6.9 Modifications likely to affect the capability approval
5.6.10 Initial capability approval
5.6.11 Granting of capability approval
5.6.12 Maintenance of capability approval
5.6.13 Extension of capability approval
5.6.14 Quality conformance inspection
5.7 Rework and repair [Go to Page]
5.7.1 Rework
5.7.2 Repair
5.8 Release for delivery [Go to Page]
5.8.1 General
5.8.2 Certified records of released lots
5.8.3 Delayed delivery
5.8.4 Release for delivery before the completion of Group B tests
5.9 Alternative test methods
5.10 Unchecked parameters
5.11 Characteristics and parameters for application reference
5.12 Technology approval procedures [Go to Page]
5.12.1 General
5.12.2 Eligibility for technology approval
5.12.3 Application of technology approval
5.12.4 Description of technology
5.12.5 Demonstration and verification of the technology
5.12.6 Granting of technology approval
5.12.7 Maintenance of technology approval
5.12.8 Quality conformance inspection
5.12.9 Failure rate level determination
5.12.10 Outgoing quality level
6 Test and measurement procedures [Go to Page]
6.1 General
6.2 Standard atmospheric conditions [Go to Page]
6.2.1 Standard atmospheric conditions for testing
6.2.2 Recovery conditions
6.2.3 Referee conditions
6.2.4 Reference conditions
6.3 Drying and recovery [Go to Page]
6.3.1 General
6.3.2 Procedure I
6.3.3 Procedure II
Tables [Go to Page]
Table 1 – Standard atmospheric conditions
6.4 Visual examination and check of dimensions [Go to Page]
6.4.1 Visual examination
6.4.2 Marking
6.4.3 Dimensions (gauging)
6.4.4 Dimensions (detail)
6.5 General requirements for electrical tests
6.6 Varistor voltage
6.7 Leakage current
6.8 Capacitance
6.9 Voltage proof (for insulated varistors only) [Go to Page]
6.9.1 General
6.9.2 V-block method
6.9.3 Metal ball method
6.9.4 Foil method
6.10 Insulation resistance (for insulated varistors only) [Go to Page]
6.10.1 Test procedure
6.10.2 Measurement and requirements
6.11 Clamping voltage
6.12 ESD clamping voltage (for surface mount electrostatic protective varistors only)
6.13 Maximum peak current [Go to Page]
6.13.1 Initial measurement
6.13.2 Test procedure
6.13.3 Final inspection, measurement and requirements
6.14 Rated average dissipation power [Go to Page]
6.14.1 General
6.14.2 Initial measurement
6.14.3 Test procedure
6.14.4 Final inspection, measurement and requirements
6.15 Rated energy [Go to Page]
6.15.1 General
6.15.2 Initial measurement
6.15.3 Test procedure
6.15.4 Final inspection, measurement and requirements
6.16 Electrostatic discharge (ESD) (for surface mount electrostatic protective varistors only) [Go to Page]
6.16.1 Initial measurement
6.16.2 Test procedure
6.16.3 Final inspection, measurement and requirements
6.17 Robustness of terminations [Go to Page]
6.17.1 General
6.17.2 Test Ua1 – Tensile
6.17.3 Test Ub – Bending (half of the number of terminations)
6.17.4 Test Uc – Torsion (the other half of the number of terminations)
6.17.5 Test Ud – Torque (for terminations with threaded studs or screws and for integral mounting devices)
6.17.6 Visual examination
6.17.7 Final measurement
6.17.8 Robustness of terminations of surface mount varistors
Table 2 – Force for wire terminations
Table 3 – Torque
6.18 Resistance to soldering heat [Go to Page]
6.18.1 Preconditioning
6.18.2 Test procedure
6.18.3 Recovery
6.18.4 Final inspection, measurement and requirements
6.19 Solderability [Go to Page]
6.19.1 General
6.19.2 Test procedure
6.19.3 Final inspection, measurements and requirements
6.20 Rapid change of temperature [Go to Page]
6.20.1 Initial measurement
6.20.2 Test procedure
6.20.3 Final inspection, measurement and requirements
6.21 Shock [Go to Page]
6.21.1 Initial measurement
6.21.2 Test procedure
6.21.3 Final inspection, measurement and requirements
6.22 Vibration [Go to Page]
6.22.1 Initial measurement
6.22.2 Test procedure
6.22.3 Final inspection, measurement and requirements
6.23 Climatic sequence [Go to Page]
6.23.1 General
6.23.2 Initial measurement
6.23.3 Dry heat
6.23.4 Damp heat, cyclic, Test Db, first cycle
6.23.5 Cold
6.23.6 Low air pressure
6.23.7 Damp heat, cyclic, Test Db, remaining cycles
6.23.8 Final inspection, measurement and requirements
6.24 Damp heat, steady state [Go to Page]
6.24.1 Initial measurement
6.24.2 Test procedure
6.24.3 Final inspection, measurement and requirements
Table 4 – Number of cycles
6.25 Fire hazard
6.26 Endurance at upper category temperature [Go to Page]
6.26.1 Test system
6.26.2 Initial measurement
6.26.3 Mounting of the samples
6.26.4 Test procedure, measurement and requirements
6.27 Solvent resistance of marking [Go to Page]
6.27.1 Test procedure
6.27.2 Requirements
6.28 Component solvent resistance [Go to Page]
6.28.1 Initial measurements
6.28.2 Test procedure
6.28.3 Measurement and requirements
6.29 Mounting (for surface mount varistors only)
Figure 2 – Mounting method for measurement of surface mount varistors
Annex A (informative) Rules for the preparation of detail specifications for capacitors and resistors for electronic equipment
Annex B (normative) Test pulses used in this specification [Go to Page]
B.1 Types of test pulses [Go to Page]
B.1.1 General
B.1.2 Pulse type 1
B.1.3 Pulse type 2 (rectangular pulse)
B.1.4 Pulse type 3 (ESD discharge pulse)
Figure B.1 – Shape of pulse current type 1
B.2 Pulse parameters [Go to Page]
B.2.1 Value of the pulse current/voltage
B.2.2 Virtual front time T1
Figure B.2 – Shape of pulse voltage type 1
Figure B.3 – Shape of pulse type 2 [Go to Page]
B.2.3 Virtual origin O1
B.2.4 Virtual time to half-value T2
B.2.5 Virtual duration of peak of a rectangular pulse current TD
B.2.6 Virtual total duration TT of a pulse current
Figure B.4 – Shape of pulse type 3
B.3 Tolerances for the pulses
Table B.1 – Accepted differences between specified and recorded pulse values
Table B.2 – Tolerances for pulse type 3
Annex C (informative) Recommended measurement/test methods for characteristics and parameters for application reference [Go to Page]
C.1 Voltage vs. current characteristic
C.2 Maximum peak current derating characteristic [Go to Page]
C.2.1 Rationale related to this test
C.2.2 Failure criteria
C.2.3 Pulse life test
C.2.4 Graphing of the maximum peak current derating curves
C.3 Thermal resistance (for leaded varistors only) [Go to Page]
C.3.1 Test system
Figure C.1 – Maximum peak current derating characteristic [Go to Page]
C.3.2 Mounting of the sample
C.3.3 Test procedure
C.4 Abnormal overvoltage withstanding duration [Go to Page]
C.4.1 Test system
C.4.2 Test procedure
C.4.3 Requirements [Go to Page]

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BS EN IEC 61051-1:2018 Varistors for use in electronic equipment - Generic specification, 2018

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