• UNE-EN 61643-321:2003

    Current The latest, up-to-date edition.

    Components for low-voltage surge protective devices -- Part 321: Specifications for Avalanche Breakdown Diode (ABD).

    Available format(s):  Hardcopy, PDF

    Language(s):  Spanish, Castilian, English

    Published date:  28-02-2003

    Publisher:  Asociacion Espanola de Normalizacion

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    Table of Contents - (Show below) - (Hide below)

    1 Scope
    2 Normative references
    3 Definitions and symbols
    4 Basic function and description for ABDs
    5 Service conditions
    6 Standard test methods and procedures
       6.1 Standard design test criteria
       6.2 Test conditions
       6.3 Clamping voltage V[c] (see figure 2)
       6.4 Rated peak impulse current I[PPM] (see figure 2)
       6.5 Maximum working voltage V[WM] and maximum working
            r.m.s. voltage V[WM[rms]] (see figure 3)
       6.6 Stand-by current I[D] (see figure 3)
       6.7 Breakdown (avalanche) voltage V[BR] (see figure 4)
       6.8 Capacitance C [j]
       6.9 Rated peak impulse power dissipation P[PPM]
       6.10 Rated forward surge current I[FSM] (see figure 1c)
       6.11 Forward voltage V[FS]
       6.12 Temperature coefficient of breakdown voltage alpha
       6.13 Temperature derating (see figure 5)
       6.14 Thermal resistance R[thJA] or R[thJC] or R[thJL]
       6.15 Transient thermal impedance Z[thJA] or Z[thJC] or
       6.16 Rated average power dissipation P[MAV]
       6.17 Peak overshoot voltage V[OS] (see figure 7)
       6.18 Overshoot duration (see figure 7)
       6.19 Response time (see figure 7)
    7 Fault and failure modes
       7.1 Degradation fault mode
       7.2 Short-circuit failure mode
       7.3 Open-circuit failure mode
       7.4 "Fail-safe" operation
    Annex ZA (normative) Normative references to international
             publications with their corresponding European

    Abstract - (Show below) - (Hide below)

    Applies to avalanche breakdown diodes (ABDs) which represent one type of surge protective device component (hereinafter referred to as SPDC) used in the design and construction of surge protective devices connected to low-voltage power distribution systems, transmission, and signalling networks.

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    Committee CTN 201/SC 37AB
    Document Type Standard
    Publisher Asociacion Espanola de Normalizacion
    Status Current
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