120 Three Phase Surge Suppressors
Last Updated: April 1, 2025
Description
120 Three Phase Surge Suppressors are devices designed to protect electrical systems from voltage spikes and surges. They are specifically tailored for three-phase power systems, which are commonly used in industrial and commercial settings. These suppressors work by diverting excess voltage away from critical components, thereby preventing damage to electrical equipment.
Working Principle
Three-phase surge suppressors operate by utilizing components such as gas discharge tubes, metal oxide varistors (MOVs), and transient voltage suppressors (TVS) to manage and mitigate voltage spikes. When a surge occurs, these components work together to shunt the excess voltage away from the protected equipment. The gas discharge tube handles large overcurrents, albeit slowly, while the MOVs and TVS provide rapid response to clamp the voltage to a safe level. This layered defense ensures that the equipment remains protected until the surge is fully dissipated.
Applications
Three-phase surge suppressors are widely used in environments where three-phase power is prevalent. Specific applications include protecting large industrial motors, HVAC systems, and other heavy machinery that rely on three-phase power. They are also essential in safeguarding sensitive equipment in data centers and telecommunications facilities, where uninterrupted power is critical.
Advantages over other Three Phase Surge Suppressors
One of the key advantages of certain three-phase surge suppressors is their ability to provide multistage protection, which offers a more comprehensive defense against a variety of surge characteristics. This can be particularly beneficial in environments with frequent or severe voltage fluctuations, as it ensures a higher level of protection for sensitive equipment.
Limitations
A limitation of three-phase surge suppressors is that they may not be effective against all types of electrical disturbances, such as those caused by direct lightning strikes. Additionally, the performance of these devices can degrade over time, especially if they are exposed to frequent surges, necessitating regular maintenance and replacement.
Considerations
When selecting a three-phase surge suppressor, it is important to consider factors such as initial cost, operating expenses, and durability. While the initial investment may be significant, the long-term benefits of protecting expensive equipment can outweigh these costs. Durability is also a key consideration, as more robust devices may offer longer service life and reduced maintenance needs. Additionally, the accuracy of the suppressor in clamping voltage to safe levels is crucial to ensure the continued protection of connected equipment. Regular maintenance and timely replacement of worn components are essential to maintain optimal performance.
from Time Mark Corporation
Transient/Surge Absorbers (TSAs) provide system designers with a cost effective method of protecting sensitive electrical and electronic equipment from damage caused by switching transients, coil and motor backlash, and near miss lightning strikes. There are 3 models available: single-phase (1P),... [See More]
- Voltage: 120
- Technology: Metal Oxide Varistor
- Mounting: Plug-in
- Maximum AC Power: 25000
from Transtector Systems, Inc.
The SP Series of AC panel surge protectors provides a full range of nominal operating voltages from 120 Vac to 600 Vac to support global AC surge protection requirements and voltages. The UL 1449 4th Edition design, uses thermally protected MOV technology to ensure robust, reliable, protection for... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120-600, 120-480 Vac
- Technology: Metal Oxide Varistor
- Mounting: DIN Rail
- Surge Current: 50000 to 100000
from MCG SURGE PROTECTION
Features: 120LS: I peak=120,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition. NEMA LS1-1992. Three times redundant protection paths per phase. Employs new 40kA varistors with built in high-speed thermal disconnect. Solid copper bus bar construction. Field-replaceable modules. EMI/RFI noise... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 120000
from CITEL SURGE PROTECTION
The DS70US is a universal SPD for the most demanding AC Power applications. The DS70US Series protects any single or three phase voltage up to 690Vac from the effects of lightning and switching transients. These SPD are approved to the new UL1449 4th Edition (effective March. 2016) and have... [See More]
- Voltage: 120; 240; 480; 600; 120/240; 120/208; 277/480; 347/600; 240-415 V, 400-690 V
- Operating Temp: -40 to 185
- Mounting: DIN Rail
- 3-Phase Configuration: Delta; Wye
from ASCO Power Technologies
The SPDee Series utilizes large Block 50kA Thermal Protected MOV ’s with surge current levels of 50kA per mode. The unit is a perfect replacement to the obsolete surge arrestors. With a small, compact design and line or load side installation flexibility, this unit can be installed anywhere in... [See More]
- Voltage: 120
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel (optional feature); DIN Rail (optional feature); Pipe Nipple
- Surge Current: 50000
from Pentair, Inc.
. COMPACT TYPE. 54 MM W X 68 MM D X 90 MM H SIZE. DISTRIBUTION PANEL BOARD, MOTOR CONTROL CENTER, SUB DISTRIBUTION PANEL USED ON. 0 TO 100 HZ FREQUENCY RATING. 2 AWG SOLID/4 AWG STRANDED WIRE CONNECTION TYPE. UL 1449, CE APPROVAL. POWER DISTRIBUTION SYSTEM APPLICATION. 120 TO 150 VAC VOLTAGE... [See More]
- Voltage: 120
- Surge Current: 50000
- Mounting: DIN Rail
- Operating Temp: -40 to 176
from Transtector Systems, Inc.
AC surge protector (also known as SPD or lightning protector) 1101-809-M-1 from Transtector is a UL1449 4th Ed. panel style SPD that utilizes state of the art SASD/MOV technology to protect critical equipment that operates on a 120/208 Vac 3-Phase Wye electrical ser-vice. This surge protector... [See More]
- Voltage: 120; 208
- Technology: Metal Oxide Varistor; Silicon Avalanche Diode
- Mounting: Wall/Panel
- Surge Current: 160000
from MCG SURGE PROTECTION
Features: 120,000 amps per phase. UL1449 3rd Edition. Field-replaceable, high capability protection modules with lifetime replacement warranty. High performance, low inductance MicroZ ™ -installed cable. (Click here). Event counter and front panel LEDs for status indication. LED internal... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 120000
from CITEL SURGE PROTECTION
Characteristics,. - Surge Capacity to 50kA 8/20us per mode, 100kA 8/20us Total. - UL1449 Nominal Discharge Current (In) 20kA (All models). - UL1449 Short-circuit Current Rating (SCCR) 200kA (All models). - UL96A Master Label Compliant. - Hybrid TOV circuit provides immunity during high line... [See More]
- Voltage: 120; 240; 140, 280, 230, 280, 320, 350, 400, 550, 560, 690 V
- Operating Temp: -40 to 185
- Mounting: In-line or Integrally Attached
- 3-Phase Configuration: Delta; Wye
from ASCO Power Technologies
Advanced Protection Technologies (APT) has been a worldwide leader in the surge suppression industry since 1985. APT ’s surge protection products have long set the standard for protection of commercial & industrial facilities. surgeassure ™ was formed to bring this same level of... [See More]
- Voltage: 120
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel
- Surge Current: 120000 to 240000
from Transtector Systems, Inc.
AC surge protector (also known as SPD or lightning protector) 1101-719 from Transtector is a UL 94-5V panel style SPD that utilizes state of the art SASD technology to protect critical equipment that operates on a 127/220 Vac 3-Phase Wye electrical service. This surge pro-tector provides effective... [See More]
- Voltage: 120; 220
- Technology: Metal Oxide Varistor; Silicon Avalanche Diode
- Mounting: Wall/Panel
- Surge Current: 10000
from MCG SURGE PROTECTION
Features: 120,000 amps per phase. UL1449 3rd Edition. Field-replaceable, high capability protection modules with lifetime replacement warranty. 8 Ft. installed cable. Front panel LED's for status indication. LED internal diagnostics for on-site maintenance. Audible fault alarm with mute switch. All... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 120000
from CITEL SURGE PROTECTION
CITEL model DS250VG is a heavy duty AC Surge Protection Device (SPD) for high risk, low tolerance electrical service entrance applications. The DS250VG provides protection against the direct and indirect effects of lightning and is particularly useful in a high lightning area where the risk of heavy... [See More]
- Voltage: 120; 220; 277; 120-127 V, 220-277 V
- Technology: VG Technology for Maximum Performance
- Mounting: Symmetrical Rail 35 mm
- Operating Temp: -40 to 185
from Transtector Systems, Inc.
AC surge protector (also known as SPD or lightning protector) I2R-T240-4PG120 from Transtector is a DIN-Rail style SPD that utilizes state of the art MOV/GDT technology to protect critical equipment that operates on a 120 Vac 3-Phase Wye + CM electrical service. This surge protector provides... [See More]
- Voltage: 120
- Technology: Metal Oxide Varistor
- Mounting: DIN Rail
- Surge Current: 40000
from MCG SURGE PROTECTION
Features: 200,000 amps per phase. UL1449 3rd Edition. Independent lab tested modules. NEMA LS 1 Tested. Redundant modular protection withstands multiple lightning strikes. Solid copper bus bar construction for minimal impedance and enhanced current sharing. High performance, low inductance. Micro-Z... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 200000
from CITEL SURGE PROTECTION
CITEL model DS150E is a heavy duty AC Surge Protection Device (SPD) for high exposure applications such as direct lightning strikes, capacitor bank switching and large inductive loads. The DS150E is a single pole device that incorporated a multi-varistor circuit. It offers unmatched mechanical... [See More]
- Voltage: 120; 220; 277; 480; 347V-480V, 347V-480V, 347V-480V
- Technology: Metal Oxide Varistor
- Mounting: Symmetrical Rail 35 mm
- Operating Temp: -40 to 185
from Transtector Systems, Inc.
AC surge protector (also known as SPD or lightning protector) I2R-T240-4P120 from Transtector is a DIN-Rail style SPD that utilizes state of the art MOV technology to protect critical equipment that operates on a 120 Vac 3-Phase Wye electrical service. This surge protector provides effective... [See More]
- Voltage: 120
- Technology: Metal Oxide Varistor
- Mounting: DIN Rail
- Surge Current: 40000
from MCG SURGE PROTECTION
Features: 200,000 amps per phase, 8x20 us. Date & time of last event it handled/diverted displayed. Independent lab tested modules. UL1449 3rd Edition. NEMA LS 1. Redundant modular protection withstands multiple lightning strikes. Solid copper bus bar construction for minimal impedance and... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 200000
from CITEL SURGE PROTECTION
CITEL model DS40 is a standard duty AC Surge Protector (SPD) used in distribution or control panel applications. The DS40 is a single pole module that can be combined with other DS40 modules or a DS40G (N-G Mode Only) module. It is configurable for all 1, 2, and 3 phase application up to 480V AC. [See More]
- Voltage: 120; 480; 277-347 V, 220-240 V, 120-127 V, 277-347 V
- Operating Temp: -40 to 185
- Mounting: Symmetrical Rail 35 mm
- 3-Phase Configuration: Delta; Wye
from MCG SURGE PROTECTION
Features: 400,000 Amps per phase 8x20 us. Date & time of last event it handled/diverted displayed. Independent lab tested modules. UL1449 3rd Edition. NEMA LS 1 Tested. High capability redundant modular protection withstands multiple lightning strikes. Solid copper bus bar construction for... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; Device Mount
- Surge Current: 400000
from CITEL SURGE PROTECTION
CITEL model DS70RS is a standard duty AC Surge Protector (SPD) used in distribution or control panel applications. The DS70RS is a single pole module. It is configurable for all 1, 2, and 3 phase application up to 70kA. UL1449 3rd Edition. (UL1449 4th Edition - Type 1CA for -400, -600 *Other... [See More]
- Voltage: 120; 220; 240; 277; 277-347 V, 220-240 V, 120-127 V
- Technology: Metal Oxide Varistor
- Mounting: Symmetrical Rail 35 mm
- Operating Temp: -40 to 185
from MCG SURGE PROTECTION
Features: I peak=120,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Triple redundant - three fused surge paths/phase. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 120000
from CITEL SURGE PROTECTION
CITEL model DS240 surge protectors are used mainly for distribution panels of single-phase and three-phase networks. They provide common-mode protection (between the active conductors and ground) and are available with an option remote alarm. The DS240 is built with a plug-in module and a fixed... [See More]
- Voltage: 120; 208; 220; 240; 277
- Operating Temp: -40 to 185
- Mounting: Symmetrical Rail 35 mm
- 3-Phase Configuration: Delta; Wye
from MCG SURGE PROTECTION
Features: I peak=160,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Triple redundant - three fused surge paths/phase. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 160000
from MCG SURGE PROTECTION
Features: I peak=250,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Triple redundant - three fused surge paths/phase. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 250000
from MCG SURGE PROTECTION
Features: I peak=40,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. Filtering standard. Thermally protected MOVs. 20 Year... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 40000
from MCG SURGE PROTECTION
Features: I peak=80,000A/Phase (8 x 20 μs waveform). UL1449 3rd Edition Listed. Remote 1 Form C relay contacts with status LED. Neutral to Ground voltage monitor. Front panel protection status LEDs. Low profile design. All modes protected. Filtering standard. Thermally protected MOVs. 20 Year... [See More]
- Voltage: 120; 208; 220; 240; 277; 346; 380; 480; 600; 120/240; 120/208
- Technology: Metal Oxide Varistor
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
- Surge Current: 80000