For more than 20 years, America's leading companies have trusted Tripp Lite's Isobar Premium surge and noise suppressors to protect sensitive computer, networking and telecom equipment. With more than 18 million satisfied customers, the Isobar remains the world's #1 selling premium surge suppressor. Loaded with a generous combination of high quality components, near indestructible all-metal case, unique noise filtration system and built-in single line phone suppression for modems, the Isobar/Isotel series offers the highest level of protection attainable in a multi-outlet strip. Robust surge suppression circuits with sine-wave tracking offer extreme levels of protection against the heaviest surge conditions exceeding IEEE 587 category A & B specifications and reducing 6,000V test surges to harmless levels under 35 volts. Isobar's unique protection system combines large torodial chokes, ferrite rod-core inductors, HF/VHF capacitors and multiple layers of metal oxide varistors into exclusive isolated filter banks that remove EMI/RFI interference, even noise generated by other pieces of connected equipment. ISOTEL4ULTRA offers 4 outlets arranged in two filter banks to prevent system crashes, reboots and performance problems common as noisy system peripherals are powered off and on. Surge suppression rated at 3330 joules/92,000 amps offers network-grade protection. Widely spaced NEMA 5-15 outlets accommodate up to 2 large transformer plugs without blocking outlets. A pair of RJ11 jacks offer single phone line surge suppression for modems, fax machines and cordless phones. Diagnostic LEDs confirm power availability, line fault and protection status. Includes 6 foot AC line cord with space-saving angled input plug, keyhole mounting tabs and a set of 4 child safety covers.

- Tripp Lite's ISOBAR/ISOTEL is the world's #1 selling premium suppressor series with more than 18 million satisfied customers and a safety-tested history
- of 20+ years
- Robust surge suppression with sine-wave tracking protects against the heaviest of surge conditions, exceeding IEEE category A&B specifications and
- reducing 6,000V test surges to harmless levels less than 35 volts.
- Multi-component suppression circuits combine toroidal chokes, ferrite rod-core inductors, HF/VHF capacitors and multiple layers of metal oxide varistors
- into exclusive isolated filter banks that remove EMI/RFI interference, even noise from other pieces of connected equipment
- Single phone line surge suppression protects modems, fax machines and cordless phones (2 wire, single line, RJ11 jacks)
- 4 outlets arranged in two filter banks prevent system crashes, reboots and performance problems common as noisy peripherals are
- 4 outlets arranged in two filter banks prevent system crashes, reboots and performance problems common as noisy peripherals are powered off and on
- Network grade surge suppression rated at 3330 joules/92,000 amps
- Widely spaced outlets accommodate up to 2 large transformer plugs without blocking outlets
- 3 LED indicators confirm suppressor operation and site wiring status, plus warning of suppressor or electrical fault conditions
- Lighted power switch with integrated 12 amp circuit breaker offers power control and overload protection
- 6 foot AC line cord with space-saving angled input plug
- Keyhole mounting tabs for installation in a varitey of applications
- Set of 4 outlet covers safely seal off unused outlets
- 120VAC, 50/60Hz electrical compatibility
- $50,000 Ultimate Lifetime Insurance (U.S., Canada, and Puerto Rico only)
- Automatic shutoff cuts power to outlets when the protection circuit has been compromised