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Combined Category D, C, B tested protector (to BS EN 61643) suitable for
most twisted pair signalling applications. Available for working voltages of up
to 6, 15, 30, 50 and 110 Volts. ESP TN suitable for Broadband, POTS, dial-up,
T1/E1, lease line and *DSL telephone applications. For use at boundaries up
to LPZ 0 to protect against flashover (typically the service entrance location)
through to LPZ 3 to protect sensitive electronic equipment.