UL 1449 Second Edition Surge Suppressors
Last Updated: April 1, 2025
Description
UL 1449 Second Edition Surge Suppressors are devices designed to protect electrical equipment from voltage spikes by limiting the voltage supplied to an electric device by either blocking or shorting to ground any unwanted voltages above a safe threshold.
Working Principle
Surge suppressors operate by channeling excess voltage away from the protected equipment. When a surge occurs, the suppressor detects the excess voltage and diverts it to the ground, preventing it from passing through to the connected devices. This is achieved through components like metal oxide varistors (MOVs) or gas discharge tubes (GDTs), which act as a switch that opens or closes based on the voltage level. These devices are crucial as they protect sensitive electronic equipment from damage due to transient voltage spikes, which can occur due to lightning strikes, power outages, or other electrical disturbances.
Applications
UL 1449 Second Edition Surge Suppressors are used in various applications to protect electronic circuits and devices. Specific examples include protecting programmable logic controllers (PLCs), PLC networks, and computer circuits against high voltages. They are also used in heating, ventilation, and air conditioning (HVAC) systems to safeguard electronic components from power surges.
Advantages over other Surge Suppressors
One of the advantages of UL 1449 Second Edition Surge Suppressors is their compliance with safety standards from Underwriters Laboratories (UL), which ensures a high level of reliability and safety. They offer bidirectional protection and high-surge current capability, making them suitable for environments with frequent or severe voltage spikes. Additionally, they are designed to handle multiple transients in succession, providing robust protection over time.
Limitations
A limitation of these surge suppressors is that they may not be effective against all types of electrical disturbances, such as harmonics or undervoltage conditions, which they do not recognize as problems. Additionally, their effectiveness can diminish over time as the components degrade with repeated exposure to surges.
Considerations
When selecting UL 1449 Second Edition Surge Suppressors, it is important to consider factors such as initial costs, operating expenses, and maintenance requirements. The durability of the suppressor is a key factor, as devices with higher surge current capacities may offer longer service life in high-exposure environments. Replacement and maintenance costs should also be considered, as components like MOVs may need to be replaced after significant surge events to ensure continued protection.
from Schneider Electric Surge Protection
Retrofit ready, application flexibility, compact design, versatility [See More]
- Standards: UL 1449 Second Edition; UL
- Technology: Metal Oxide Varistor
- Device Type: Dataline & DC Signal
- Mounting: Plug-in
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]
- Standards: UL 1449 Second Edition; UL
- Technology: Metal Oxide Varistor; Silicon Avalanche Diode; Hybrid; Inductor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel
from MCG SURGE PROTECTION
Max. Continuous Operating VAC: 130% Rated Line Voltage. Response Time: <5 Nanoseconds. Modes of Protection: L-N, L-G, N-G. Surge Current (8x20us): 1 Event - 10kA, 100 Events - 2kA, 1000 Events - 1kA, 10,000 Events - 500A. Status Indicators: Green LED. Operating Altitude: 13,000 ft. (4000m). Temp. [See More]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; CE Marking
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount; In-line or Integrally Attached
from Schneider Electric Surge Protection
This exclusive Square D whole-house surge protector installs externally to any load center, providing comprehensive protection for telephone wiring, coax cable, and ac branch circuit wiring. The Surgebreaker Plus Multi-Path Surge Protector also comes with an 5-year, $50,000 warranty for residential... [See More]
- Standards: UL 1449 Second Edition
- Mounting: Wall/Panel
- Device Type: Single Phase
- Application: Data Acquisition; Network Applications; Telecom. Applications
from ASCO Power Technologies
Our H Series has one, replaceable module per phase and surge current levels of 120kA and 160kA per phase. Our lowest cost replaceable module product for “budget conscience ” projects. FEATURES: UL 1449 Third Edition Listed. 120kA & 160kA per phase ratings. Type 2 SPD – All UL... [See More]
- Standards: UL 1449 Second Edition; ANSI; CE Marking; IEEE; UL
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; Device Mount
from Schneider Electric Surge Protection
Modular devices are available for use in service entrance or branch panel locations. Our EMA Series products provide a complete line of application solutions and meet the requirements of ANSI/IEEE C62.41 and C62.45, and UL 1449 Second Edition, 2007 Requirements. Peak surge current ratings per phase... [See More]
- Standards: UL 1449 Second Edition; ANSI; IEEE
- Mounting: Wall/Panel
- Device Type: Single Phase
- Application: Data Acquisition; Network Applications; Telecom. Applications
from ASCO Power Technologies
Our H Series has one, replaceable module per phase and surge current levels of 80kA, 120kA and 160kA per phase. Our lowest cost replaceable module product for “budget conscience ” projects. FEATURES: UL 1449 Third Edition Listed. 80 kA, 120kA & 160kA per phase ratings. Type 2 SPD... [See More]
- Standards: UL 1449 Second Edition; ANSI; CE Marking; IEEE; UL
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; CE Marking
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; Device Mount
from ASCO Power Technologies
With one, replaceable module per phase and surge current levels of 160kA and 240kA per phase, the XGA Series is a great fit for Service Entrance and Downstream applications. The XGA Features APT ’s Patented TranSafe ™ Circuitry. FEATURES: UL 1449 Third Edition Listed. 160kA & 240kA... [See More]
- Standards: UL 1449 Second Edition; ANSI; CE Marking; IEEE; UL
- Technology: Metal Oxide Varistor; Silicon Avalanche Diode (optional feature)
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; Device Mount
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; Device Mount
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; Device Mount
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; Device Mount
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount
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]
- Standards: UL 1449 Third Edition; UL 1449 Second Edition; ANSI; CE Marking; IEC; IEEE
- Technology: Metal Oxide Varistor
- Device Type: SPD; Single Phase
- Mounting: Wall/Panel; DIN Rail (optional feature); Device Mount