P3602ACMC datasheet(120/212 Pages) TECCOR

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P3602ACMC Datasheet(PDF) 120 Page - Teccor Electronics

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Secondary Protection

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SIDACtor® Data Book and Design Guide

Secondary Protection Reference Circuit

Figure 3.38 also shows an example of an interface design for a secondary protector. The

P3203AB SIDACtor device is used because the peak off-state voltage (VDRM) is greater

than the potential of a Type B ringer signal superimposed on the POTS (plain old telephone

service) battery.

150 VRMS

Ö2 + 56.6 VPK = 268.8 VPK

Coordination between the station protector and the secondary protector occurs due to the

line impedance between the two devices. The line impedance helps ensure that the primary

protector will begin to conduct while the secondary protector limits any of the let-through

voltage to within the VS rating of the SIDACtor device.

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