Model Number: ISOBAR12ULTRA

Isobar 12-Outlet Rack-Mount Surge Protector, 15-ft Cord, 3840 Joules, Locking Switch Cover


Do you need network-grade protection for your 19” rackmount equipment? The best-selling ISOBAR12ULTRA Rackmount Surge Protector has isolated filter banks to prevent “line noise” from affecting your sensitive equipment, and it has a high 3840-joule surge protection rating. And you won’t be tied down to your utility outlets—its extra-long 15-ft cord gives you outlets where you need them.
  • 12 outlets (2 front, 10 rear)
  • Extra-long 15-ft cord
  • 3840 joule rating—more joules mean more protection!
  • All-metal housing with diagnostic LEDs
  • Isolated filter banks remove damaging line noise
  • Switch safety cover prevents accidental shutoff


















ISOBAR12ULTRA Isobar Surge Protector


Tripp Lite's ISOBAR12ULTRA offers network-grade surge and noise suppression in a versatile all-metal multi-mount cabinet. Detachable mounting flanges are configurable for rack mount, wall mount and under-counter installation. Uses only 1 rack space (1U) when installed in any 19 inch EIA standard rack. Features the highest level of AC surge and EMI/RFI noise suppression of all Tripp Lite rackmount surge protectors. Outlets are arranged in exclusive isolated filter banks to limit noise interaction among connected items. Includes 12 outlets (2 front/10 rear), 15 ft AC power cord and guarded power switch to reduce the risk of accidental shutoff. Diagnostic LEDs indicate AC present, line fault and protection status. $25,000 Ultimate Lifetime Insurance (U.S., Canada, and Puerto Rico only) coverage .

PLUG/OUTLETS: Input: NEMA 5-15P/Output: 12 NEMA5-15R (2 front & 10 rear)
ELECTRICAL: 120V AC, 50/60Hz, 15A (Requires NEMA 5-15R wall receptacle)
FORMAT: Supports 19 in. rack mount (uses 1 rack space/1U), wall mount, under-counter and more


  • Tripp Lite's ISOBAR is the world's number one selling premium protector series with more than 18 million satisfied customers and a safety-tested history of 20+ years.
  • Versatile all-metal cabinet with detachable mounting flanges allows rack mount, wall mount, under-counter and other creative mounting options
  • Uses one rack space (1U) in standard 19 inch rack ("zero U" mounting possible in many racks) 3840 joules/96,000 amp network-grade AC surge suppression with EMI/RFI filtering
  • 12 NEMA5-15R output receptacles (2 front/10 rear)
  • Outlets are arranged in exclusive isolated filter banks to limit noise interaction among connected items
  • 15 foot AC cord with NEMA5-15P straight-in plug connection
  • Diagnostic LEDs confirm AC present (green), Line Fault (red) and Protected (green)
  • Lighted power switch confirms power on/off status
  • Snap-in switch guard prevents accidental turn off
  • 15 amp capacity with circuit breaker
  • 120V AC, 50/60Hz electrical compatibility
  • $25,000 Ultimate Lifetime Insurance (U.S., Canada, and Puerto Rico only)

Package Includes

  • ISOBAR12ULTRA Surge Protector
  • Warranty information
  • Instruction manual
RoHS compliant


Frequency Compatibility 50 / 60 Hz
Output Receptacles (12) 5-15R
Output (Watts) 1800
Circuit Breaker (amps) 15
Nominal Input Voltage(s) Supported 120V AC
Recommended Electrical Service 120V (110-125V)
Input Connection Type NEMA 5-15P input plug
Input Cord Length (ft.) 15
Voltage Compatibility (VAC) 120
Maximum Surge Amps 150000
Right-Angle Plug No
Switches Red illuminated power switch controls power to all outlets
Diagnostic LED Details PROTECTION PRESENT (green), LINE FAULT (red) and LINE OK (green)
Locking Switch Cover Transparent locking switch cover prevents accidental shutoff
AC Suppression Joule Rating 3840
AC Suppression Response Time NM = 0 ns. CM = <1 ns
Protection Modes Includes full normal mode (H-N) and common mode (N-G / H-G) line surge suppression
Clamping Voltage (RMS) 140
AC Suppression Surge Current Rating 96,000 amps
AC Suppression Components Used Metal oxide varistors, toroidal balanced chokes and VHF capacitors
Safe Thermal Fusing Prevents unsafe conditions during extreme extended over-voltages and catastrophic occurrences
UL1449 Let Through Rating 330V
EMI / RFI Filtering 40-80 dB
Immunity Conforms to IEE 587 / ANSI C62.41
Telephone/DSL Protection No
Cable (Coax) Protection No
Network (Ethernet) Protection No
Shipping Dimensions (hwd / in.) 2.25 x 20.5 x 9.25
Shipping Weight (lbs.) 5.7
Unit Dimensions (hwd / in.) 1.75 x 17.5 x 4
Unit Weight (lbs.) 4.6
Material of Construction Metal
Included Mounting Accessories Included mounting flanges are pre-installed for 1U rackmount installation and can be re-configured to support a variety of mounting options
Housing Color Black
Receptacle Color Black
Color (AC Line Cord) Black
Form Factors Supported 1U rackmount, 0U vertical rackmount, wallmount and under-counter mounting supported - detachable flanges can be re-configured to support a variety of additional mounting options
Outlets Measurement (Center to Center) Distance between front outlets = 38.9mm; Distance between rear outlets = 38.9mm
UL1449 3rd Edition (AC Suppression) Tested to UL1449 3rd Edition by ETL
cUL / CSA (Canada) Approved for Canada by ETL
Approvals Exceeds IEEE 587 category A&B specifications
Product Warranty Period (Worldwide) Lifetime limited warranty
Connected Equipment Insurance (U.S., Canada & Puerto Rico) $25,000 Ultimate Lifetime Insurance


by PowerReviews
Tripp LiteIsobar 12-Outlet Rack-Mount Surge Protector 15-ft Cord 3840 Joules Locking Switch Cover

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

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Performs flawlessly

By Bymatty

from LA, CA

Verified Buyer

Comments about Tripp Lite Isobar 12-Outlet Rack-Mount Surge Protector 15-ft Cord 3840 Joules Locking Switch Cover:

Most of the free time and money in my life has gone to putting together a home theater system I can be proud of. Having done that I figured it was high time to buy better protection. I chose the Isobar-12 ultra, rack mount protector because it has the highest joule rating of all the surge protectors I researched that also has an output of 15 amps/1800 watts. The Isobar-12 also has the highest EMI/RFI filtering I could find at 40-80 dB. Tripp Lite's newer Isobar, HT10DBS, only goes up to 60 dB, depending on what plug is used; in addition, its output is only 12 amps/1440 watts.

Technically, I should give the Isobar-12 ultra five stars because the product performs flawlessly. I only gave four stars due to my belief that nothing is perfect; and, if it were, there would be no motivation to make it better. Adding coax and Ethernet protection with noise suppression to the feature list would have been a nice bonus. I really do enjoy having the covered power switch and the use of lights to quickly identify adequate protection. All in all, a great product that I am proud to own.

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good value

By jackv

from Orlando

Verified Buyer

Comments about Tripp Lite Isobar 12-Outlet Rack-Mount Surge Protector 15-ft Cord 3840 Joules Locking Switch Cover:

good protection for our racked servers

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Frequently Asked Questions

The operating and storage temperature range for the ISOBAR12ULTRA is 33° to 103° F.
A surge protector will protect your electronics by acting as an “electrical sponge” by clamping down on spikes, “soaking them up” and converting the excess energy into heat, thus preventing the spikes from passing through the surge protector into the sensitive electronic devices and damaging them. As with any “sponge” a surge protector has a limited absorption capacity. Once that capacity is reached, the unit is no longer able to protect and must be replaced.
All outlets on a Tripp Lite surge protector are designed to pass power continuously, as controlled by the master or individual power switches, to connected equipment.

Follow these instructions in an attempt to restore normal operation:
1. Remove any equipment still connected to the unit.
2. Be sure that the master switch is in the Off position.
3. Unplug the unit from the AC power source.
4. Check the circuit breaker on the unit to make sure that it is reset.
5. Find an outlet that provides computer-grade 120V AC power. Check the outlet by plugging in a device, such as an alarm clock or radio, to verify that the outlet is passing power.
6. Plug the unit into the outlet.
7. Toggle the master switch and all other power switches to the On position.
8. One by one, connect a small device, such as an alarm clock or radio, to each outlet at the rear of the unit. Test the device to make sure that it is working properly at each outlet.

If the unit is not passing power from all outlets after these steps have been followed, the unit requires replacement.
Isobar surge protectors have the ability to minimize EMI (electromagnetic interference) and RFI (radio frequency interference) on the input AC line. However, a piece of equipment attached to the Isobar may still receive interference from other devices nearby.

Here are some common reasons why a device plugged into an Isobar may be receiving interference:
    -A second device that is plugged into the same filter bank as the device receiving interference may be causing the problem.
    -Another device in use nearby can cause interference through the air, not through the AC line.
    -The surge protector may have taken a surge hit and requires replacement.

Follow these steps to identify the problem:
1. Unplug the device that is receiving interference and plug it directly into a wall outlet. Test to make sure that the device is working properly.
2. If the device operates correctly, proceed to the next step. If it does not operate correctly, contact the manufacturer of the device to determine the problem. There may also be another device close by that is causing interference.
3. Remove any other devices connected to the Isobar where the first device was plugged in.
4. Plug the device that is receiving interference back in into the same outlet where it was previously connected to the Isobar. Test to make sure your connected device is working properly.

If you have followed these steps and the device still does not work properly, the Isobar requires replacement.

Additional FAQs may be available on the ISOBAR12ULTRA model support page.


No accessories are available for this model.

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