CITEL-DS440-230-G-3-Phase-4-Pole-AC-Surge-Protector-Type-2-CITEL-DS440-230-G-P-Citel-DS440-Type-2-surge-protectors-are-compact-devices-designed-to-protect-3-phase-neutral-networks-at-the-main-switchboard-P-P-They-provide-common-or-common-differential-mode-protection-&-use-high-energy-varistors-equipped-with-thermal-disconnectors-&-failure-indicators-to-comply-with-standards-The-DS440-is-DIN-rail-compatible-&-constructed-with-a-fixed-base-that-houses-a-replaceable-plug-in-module-f