šŸ”„šŸ”„ Donā€™t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

šŸ”
BS EN IEC 61051-2:2021:2022 Edition

BS EN IEC 61051-2:2021:2022 Edition

$142.49

Varistors for use in electronic equipment – Sectional specification for surge suppression varistors

Published By Publication Date Number of Pages
BSI 2022 28
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. Weā€™re here to assist you 24/7.
Email:[email protected]

This part of IEC 61051 is a sectional specification and is applicable to metal oxide varistors with symmetrical voltage-current characteristics for use in electronic equipment connected to any AC or DC supply system. These varistors are designed to protect electronic and other sensitive equipment from high transient surges. Varistors under the scope of this sectional specification are not intended to give primary protection against lightning surges. These varistors have metallic connections and are intended to be mounted as through hole component or directly on to printed boards. The object of this document is to prescribe preferred ratings and characteristics and to select from IEC 61051-1 the appropriate quality assessment procedures, tests and measuring methods, and to give general performance requirements for this type of varistors. Test severities and requirements prescribed in detail specifications referring to this sectional specification should be of equal or higher performance level, because lower performance levels are not permitted.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
12 3 Terms and definitions
4 Preferred characteristics
4.1 Climatic categories
4.2 Voltage ratings
Tables
Table 1 ā€“ Upper and lower category temperature and durationof the damp heat, steady state test
13 Table 2 ā€“ Preferred voltage ratings for disk type varistors
14 4.3 Derating for metal oxide varistors
4.3.1 General
4.3.2 Derating at increased operating temperatures
Table 3 ā€“ Preferred voltage ratings for SMD types
15 4.3.3 Maximum peak current derating characteristic
Figure 1 ā€“ Typical temperature derating curve for maximum continuous voltage,surge current, energy absorption and average power dissipation
Figure 2 ā€“ Typical maximum peak current derating curve
16 5 Test procedures, test severities and performance requirements
5.1 General
5.2 Visual examination and check of dimensions
5.3 Electrical tests
5.3.1 Varistor voltage
5.3.2 Leakage current
5.3.3 Capacitance
5.3.4 Voltage proof
5.3.5 Clamping voltage
5.3.6 Maximum peak current
5.3.7 Rated energy
17 5.4 Soldering test
5.4.1 Resistance to soldering heat
5.4.2 Solderability
5.5 Temperature and climate test
5.5.1 Damp heat, steady state
5.5.2 Endurance at upper category temperature
5.5.3 Rapid change of temperature
5.5.4 Climatic sequence
5.6 Robustness test
5.6.1 Robustness of terminations
5.6.2 Shock testing
18 5.6.3 Vibration
5.6.4 Solvent resistance of marking
5.7 Fire hazard (Needle flame test)
6 Marking, packaging and ordering information
7 Detail specifications
7.1 General
7.2 Outline drawing and dimensions
19 7.3 Mounting
7.4 Ratings and characteristics
7.5 Marking
7.6 Ordering information
8 Quality assessment procedure
8.1 General
8.2 Primary stage of manufacturer
8.3 Structurally similar components
20 8.4 Qualification approval (QA)
8.4.1 Qualification approval (QA) procedures
8.4.2 Fixed sample size procedure
8.4.3 Test schedule
21 Table 4 ā€“ Test schedule for the qualification approval
24 8.5 Quality conformance inspection
8.5.1 General
8.5.2 Formation of inspection lots
8.5.3 Test schedule
8.5.4 Assessment level
25 Table 5 ā€“ Test schedule for the qualification approval
Table 6 ā€“ Periodic inspection
26 Annex X (informative)Cross-references to the previous edition of this document
Table X.1 ā€“ Cross-references

Related products

BS EN IEC 61051-2:2021
$142.49