• 80kA to 240kA surge current rating per phase
  • Includes high-performance EMI/RFI filtering
  • LED status indication via solid state diagnostics plus remote indication contacts
  • Built-in audible alarm
  • Thermal and short circuit fusing
  • Short circuit current rating: 200k AIC
  • UL 1449 3rd Edition Listed
  • 10 year product warranty
  • UL1449 Type 2 SPD, In=20kA


The MTL ZoneDefender PRO series is a versatile, high performance surge protector designed for use in a wide variety of industrial, institutional and commercial applications. The ZoneDefender PRO is the most compact, powerful, feature-rich surge protector on the market today. State-of-the-art circuitry protects equipment from high frequency noise as well as from damaging electrical transients and high-energy disturbances. In addition, the ZoneDefender PRO Series offers cost effective high capacity protection along with application versatility; features which make the Series the ultimate surge protection solution.

Suitable for all AC power applications, ZoneDefender PRO devices provide protection for AC power supplies with no restriction to the amount of load current. ZoneDefender PRO units provide protection between Line to Neutral, Line to Ground, Line to Line and Neutral to Ground. Utilizing Metal Oxide Varistor (MOV) technology, the ZoneDefender PRO's protection circuits are highly reliable, dual-redundant varistor networks ensuring your site is never unprotected. Fully automatic in operation, ZoneDefender PRO reacts immediately, clamping voltage surges without causing undue leakage losses under normal operation. No operator intervention is required, ZoneDefender PRO resets automatically and is maintenance free.

ZoneDefender PRO offers an LED status indication allowing each varistor network to be continually monitored and indicated by LEDs on the front panel of the device. In addition, remote monitoring is enabled by the unit's remote indication contacts. Thermal fusing is incorporated into each ZoneDefender PRO as an additional safety feature. Short circuit protection with 200kA AIC rating is also supplied, as standard, for added peace of mind.

The MTL ZoneDefender PRO Series is UL 1449 3rd Edition Listed and boasts an unrivaled 10 year ‘no questions asked' manufacturers product warranty. ZoneDefender PRO devices also exceed the requirements of ANSI/IEEE C62.45 and ANSI/IEEE C62.41.

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