Sidactor Protection Thyristor Products Page 40 SIDACtor Protection Thyristor Products

SIDACtor Protection Thyristors 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/17 First Level Lightning surges for DC power ports Criteria for DC Power Port Five repetitions of each polarity of the 0.5 S 100 kHz ring wave surge with a peak voltage of 0.5 kV and a current level of 41.7A per conductor shall be applied. The IEEE C62.41.2 combination wave 1.2x50/8x20 at a peak of 500V applied through an external non-inductive resistance of 10-ohms may be substituted for this ring wave. These surges are to be applied simultaneously between 1) the supply lead and ground 2) the return lead and ground This section applies to the equipment that is powered from a shared dc power plant. It is based on T1.315- 2001 Voltage Levels for DC-Powered Equipment Used in Telecommunications Environments. This section contains criteria for: minimum operating voltages, under voltage transients, over voltage transients, impulse transients, single transient, and noise related issues Table 3.24: Equipment Port Types Type 1 Network equipment connected to the outside plant (OSP) Type 2 Network equipment not connected to the OSP. Type 3 Customer premises equipment connected to the OSP. Type 4 Customer premises equipment not connected to the OSP. Type 5 Network equipment deployed in OSP & connected to the outside plant (OSP) Type 6 Equipment directly connected to external antennas Type 7 Equipment directly connected to ac power systems Type 8 Equipment directly connected to dc power systems Table 3.22: Overvoltage Transient test conditions Table 3.23: Impulse Transient test conditions Waveform Nominal-value Tolerance Overvoltage transient Level -75 V -75 to -95 V Slope 10 V/mS 9 to 11 V/mS Transient duration 10 mS 10 to 12 mS Rise-time < 2 S 0 to 2 S Waveform Nominal-value Tolerance Overvoltage transient Level -100 V -100 to -120 V Rise-time < 2 S 0 to 2 S Fall-time to half value 50 S 28 to 60 S Table 3.21: Undervoltage Transient test conditions Waveform Nominal-value Tolerance Undervoltage transient Level -5 V -4 to -5 V Fall-time 10S 0 to 12 S Transient duration 10 mS 10 to 12 mS Rise-time < 5 S 0 to 5 S Regulatory Requirements (continued)

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