McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    25 Products

    Uninterruptible Backup Power Supplies

    Image of Product. Front orientation. Backup Power Supplies. Uninterruptible Backup Power Supplies.
    Image of Specification. NEMA 5-15 Plug. Front orientation. NEMA 5-15.
    Image of Specification. NEMA 5-20 Plug. Front orientation. NEMA 5-20.
    Image of Specification. NEMA 5-15 Socket. Front orientation. 5-15.

    NEMA

    5-15

    Plug

    NEMA

    5-20

    Plug

    NEMA

    5-15

    Socket

    Image of Specification. NEMA 5-20 Socket. Front orientation. NEMA 5-20.
    Image of Specification. NEMA L5-20 Socket. Front orientation. NEMA L5-20.

    NEMA

    5-20

    Socket

    NEMA

    L5-20

    Socket

    Protect sensitive and critical electronic equipment—these uninterruptible power supplies (UPS) do not suffer a loss of power when switching from your power source to the UPS during an outage. They also protect against frequency variation and waveform distortion. All have USB and DB9 connections with cords so you can save data and safely shut down an unattended computer during outages. Choose a power output that is equal to or greater than the power your equipment requires.
    Output
    Run
    Time, min.
    Input
    NEMA Plugs
    Input Voltage
    Range, V AC
    Power
    Current,
    amp
    Voltage,
    V AC
    Voltage
    Accuracy
    Half
    Load
    Full
    Load
    Type
    Connection
    No. of
    Blades
    Output Connection
    NEMA Type
    No. of
    Outlets
    Ht.
    Wd.
    Dp.
    Specs.
    Met
    Each
    100 to 1201,000 VA/900 W9.1120±1%18.26.35-15
    Straight Blade35-15
    83.5"17.4"17.8"UL 177870485K31000000000
    100 to 1201,500 VA/1,350 W12.5120±1%16.55.85-15
    Straight Blade35-15
    83.5"17.4"17.8"UL 177870485K3200000000
    100 to 1202,200 VA/1,800 W18.3120±1%20.27.75-20
    Straight Blade35-20
    L5-20
    6
    1
    3.5"17.4"23.9"UL 177870485K2400000000

    Power-Conditioning Backup Power Supplies

    Image of Product. Front orientation. Backup Power Supplies. Power-Conditioning Backup Power Supplies, 12 amp Current Output.

    12 amp Current Output

    Image of Specification. NEMA 5-15 Plug. Front orientation. NEMA 5-15.

    NEMA

    5-15

    Plug

    Image of Specification. NEMA 5-15 Socket. Front orientation. 5-15.

    NEMA

    5-15

    Socket

    Protect sensitive equipment—these conditioners raise or lower current to keep it at a stable level during dips and surges. There is no battery transfer time during a power dip. During brownouts and blackouts, they transfer power to a built-in battery with only a momentary loss of power during transfer. Power supplies also protect against line noise and power surges. They have a USB connection and cord so you can save data and safely shut down an unattended computer during outage.
    Choose a power output equal to or greater than the power your equipment requires. Determine your volt-amps requirement by multiplying the amp draw of your equipment by 120V AC.
    Output
    Run
    Time, min.
    Input
    NEMA Plugs
    Output NEMA Sockets
    Output USB
    Sockets
    Power
    Current,
    amp
    Voltage,
    V AC
    Half
    Load
    Full
    Load
    Type
    Connection
    No. of
    Blades
    Output Connection
    NEMA Type
    No. of
    Outlets
    No. of Outlets with
    Battery Backup
    Electrical
    Connection
    No. of
    Outlets
    Ht.
    Wd.
    Dp.
    Each
    1,440 VA/900 W121201235-15
    Straight Blade35-15
    105USB-A211"3.9"16.1"70475K340000000

    Low-Profile Power-Conditioning Backup Power Supplies

    Image of Product. Front orientation. Backup Power Supplies. Low-Profile Power-Conditioning Backup Power Supplies.
    Image of Specification. NEMA 5-15 Plug. Front orientation. NEMA 5-15.

    NEMA

    5-15

    Plug

    Image of Specification. NEMA 5-15 Socket. Front orientation. 5-15.

    NEMA

    5-15

    Socket

    Smaller in height than standard backup power supplies, these fit in tight spaces. They transfer power to a built-in battery during brownouts and blackouts with only a momentary loss of power during transfer. They also protect against line noise and power surges. All have a USB connection and cord so you can save data and safely shut down an unattended computer during outage. Choose a power output equal to or greater than the power your equipment requires. Determine your volt-amps requirement by multiplying the amp draw of your equipment by 120V AC.
    Output
    Run
    Time, min.
    Input
    NEMA Plugs
    Output NEMA Sockets
    Output USB
    Sockets
    Power
    Current,
    amp
    Voltage,
    V AC
    Half
    Load
    Full
    Load
    Type
    Connection
    No. of
    Blades
    Output Connection
    NEMA Type
    No. of
    Outlets
    No. of Outlets with
    Battery Backup
    Electrical
    Connection
    No. of
    Outlets
    Ht.
    Wd.
    Dp.
    Each
    350 VA/210 W2.9120825-15
    Straight Blade35-15
    63USB-B14.1"4.3"7.3"7530K620000000
    550 VA/300 W4.612051.25-15
    Straight Blade35-15
    105USB-A, USB-B24.1"4.3"7.3"7530K63000000
    750 VA/450 W6.3120112.55-15
    Straight Blade35-15
    126USB-A13.1"12.2"6.9"7530K44000000

    Backup Power Supplies

    Image of Product. Front orientation. Backup Power Supplies.
    Image of Specification. NEMA 5-15 Plug. Front orientation. NEMA 5-15.

    NEMA

    5-15

    Plug

    Image of Specification. NEMA 5-15 Socket. Front orientation. 5-15.

    NEMA

    5-15

    Socket

    Transfer power to a built-in battery during brownouts and blackouts with only a momentary loss of power during transfer. With a USB connection and cord, you can save data and safely shut down an unattended computer during an outage with these supplies. They also protect against line noise and power surges. Choose a power output equal to or greater than the power your equipment requires. Determine your volt-amps requirement by multiplying the amp draw of your equipment by 120V AC. Power supplies cannot be sold to the regions listed due to local energy efficiency requirements.
    Output
    Run
    Time, min.
    Input
    NEMA Plugs
    Output USB
    Sockets
    Output
    Ethernet Sockets
    Power
    Current,
    amp
    Voltage,
    V AC
    Half
    Load
    Full
    Load
    Type
    Connection
    No. of
    Blades
    Output Connection
    NEMA Type
    No. of
    Outlets
    Electrical
    Connection
    No. of
    Outlets
    Connection
    No. of
    Outlets
    Ht.
    Wd.
    Dp.
    Cannot Be Sold To
    Each
    700 VA/350 W5.81201035-15
    Straight Blade35-15
    6USB-A1RJ4519.8"4.8"13.6"Colorado, Vermont, Washington7530K380000000

    Backup Power Supplies for Facility Lights

    Backup Power Supplies
    Image of Product. Back orientation. Backup Power Supplies. Backup Power Supplies for Facility Lights, Backup Power Supplies.
    Turn your facility lights into emergency lights—no need for generators or separate backup lights. Also known as battery inverters, these power supplies detect outages and shift your lights to battery power. To comply with UL 924 and help you meet NFPA standards, they activate your lights at full brightness for at least 90 minutes, even if they’re off or dimmed. A low-voltage disconnect extends the life of the battery by switching it off before it’s fully drained.
    An LED indicator tells you whether your lights are using primary or backup power. The indicator also tells you when these power supplies require maintenance. They have a manual test switch, so you can test them without disrupting the power.
    If you have more than one circuit, you’ll need to add a relay to bypass dimmers and on/off controls across circuits. You can also wire these relays to your fire alarm. Pull the alarm to activate lights to full brightness during emergencies, even without an outage. Also known as automatic load control relays.
    Maximum Recommended Power—Maximum recommended power is the total wattage of connected devices that these power supplies can support.
    Cannot Be Sold To—Power supplies that cannot be sold to the listed areas are restricted due to local energy efficiency requirements.
    Overall
    Mounting
    Holes
    Housing
    Wattage,
    W
    Max. Recommended
    Power, W
    Input Voltage,
    V AC
    Output Voltage,
    V AC
    Lg.
    Ht.
    Wd.
    Battery
    Test Type
    Run Time,
    hr.
    Trip Time,
    sec.
    For Conduit
    Trade Size
    Mounting Hardware
    Included
    No.
    of
    Dia.
    Material
    Color
    Temp.,
    ° F
    Features
    Specifications Met
    Cannot Be Sold To
    Each
    3535120 to 277120, 27719 7/8"2 3/4"2 7/8"Manual1.55No45/32"SteelGray32 to 120Remote Test Switch and LED Indicator, Low-Voltage DisconnectNFPA 70, NFPA 101 7.8.1.2.2, UL 924, UL Listed, C-UL Listed8197N260000000
    5050120 to 277120, 27722 1/2"2 3/4"3"Manual1.55No45/32"SteelGray32 to 120Remote Test Switch and LED Indicator, Low-Voltage DisconnectNFPA 70, NFPA 101 7.8.1.2.2, UL 924, UL Listed, C-UL Listed8197N21000000
    125125120 to 277120, 27723 1/8"11 3/4"4 1/2"Manual1.50.051/2
    No21/2"SteelWhite70 to 85Test Switch, LED Indicator, Low-Voltage DisconnectNFPA 70, NFPA 101 7.8.1.2.2, UL 924, UL ListedCanada8197N125000000
    125125120 to 277120, 27723 1/8"11 3/4"4 1/2"Manual1.50.051/2
    No21/2"SteelWhite70 to 85Test Switch, LED Indicator, Low-Voltage DisconnectNFPA 70, NFPA 101 7.8.1.2.2, UL 924, UL Listed, C-UL ListedCalifornia8197N122000000
    250250120 to 277120, 27719 1/8"11 5/8"7 5/8"Manual1.511/2
    No21/2"SteelWhite70 to 85Test Switch, LED Indicator, Low-Voltage DisconnectNFPA 70, NFPA 101 7.8.1.2.2, UL 924, UL Listed, C-UL Listed8197N12600000000
    375337120 to 277120, 27723"17 3/4"8 1/4"Manual1.511/2
    No21/2"SteelWhite70 to 85Test Switch, LED Indicator, Low-Voltage DisconnectNFPA 70, NFPA 101 7.8.1.2.2, UL 924, UL ListedCalifornia, Canada8197N12300000000
    550495120 to 277120, 27723"17 3/4"8 1/4"Manual1.511/2
    No21/2"SteelWhite70 to 85Test Switch, LED Indicator, Low-Voltage DisconnectNFPA 70, NFPA 101 7.8.1.2.2, UL 924, UL ListedCalifornia, Canada8197N12400000000
    550550120 to 277120, 27719 3/4"22"11"Manual1.511/2
    No21/2"SteelWhite70 to 85Test Switch, LED Indicator, Low-Voltage DisconnectNFPA 70, NFPA 101 7.8.1.2.2, UL 924, UL ListedCanada8197N12700000000
    Relays
    Image of Product. Back orientation. Backup Power Supplies. Backup Power Supplies for Facility Lights, Relays, Unthreaded Through-Hole Mount.
    Image of Product. Front orientation. Backup Power Supplies. Backup Power Supplies for Facility Lights, Relays, Fastener Mount.

    Unthreaded

    Through-Hole

    Mount

    Fastener Mount

    Relays have an LED indicator that tells you if your lights are using primary or backup power and when these relays require maintenance. They also have a test switch to make sure the system is working.
    Unthreaded Through-Hole Mount—Relays that mount into an unthreaded through hole install into knockouts in junction boxes and light fixtures.
    Fastener Mount—Fastener-mount relays are ideal when space is tight or you want to hide your relay. They fit inside a ballast channel to keep everything contained within your fixture housing.
    Overall
    Mounting
    Holes
    Wire
    Lead
    Conduit
    Connection
    Input Voltage,
    V AC
    Output Voltage,
    V AC
    Control Current,
    mA
    Switching
    Current, amp
    Max. Switching
    Voltage, V AC
    Mechanical
    Life Cycles
    Trip Time,
    sec.
    Ht.
    Wd.
    Dp.
    Battery
    Test Type
    Mounting Fasteners
    Included
    No.
    of
    Dia.
    Lg.
    No.
    of
    Gender
    Trade
    Size
    Thread
    Type
    Temp.,
    ° F
    Features
    Enclosure
    Rating
    Specifications Met
    Each
    1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
     
    Unthreaded Through-Hole Mount
    120 to 277120 to 2771182027710,000,0000.0184"4"1 3/4"ManualYes40.19"16"6Male1/2
    NPT
    -30 to 140Test Switch, LED IndicatorNEMA 1
    NFPA 101 7.8.1.2.2, UL 924, UL Listed, C-UL Listed, CE Marked8197N120000000
     
    Fastener Mount
    120 to 277120 to 2771181027710,000,0000.0181 3/4"4 3/4"1 1/4"ManualNo20.19"16"10-30 to 140Test Switch, LED IndicatorNEMA 1
    NFPA 101 7.8.1.2.2, UL 924, UL Listed, C-UL Listed, CE Marked8197N13000000
     
    Remote Testing Buttons for Relays

    Automatic Transfer Switches for Facility Lights

    Image of Product. Front orientation. Transfer Switches. Automatic Transfer Switches for Facility Lights.
    Restore lighting immediately during power outages. These switches detect when your main power source goes out and shift your lights to a backup, such as a secondary utility source or generator. To comply with UL 924 and help you meet NFPA standards, they turn your lights on at full brightness even if the lights were turned off or dimmed. You can also wire these switches to your fire alarm. Pull the alarm to activate lights to full brightness during emergencies, even without an outage. All have passed testing to meet UL 1008, a safety standard for transfer switches.
    An LED indicator tells you whether lights are running on a primary or backup power source. The indicator also tells you when these switches require maintenance.
    Remote Testing Buttons—Add a remote testing button to check if switches behind the wall or ceiling are working properly.
    Switches
    Remote
    Testing Buttons
    Switching
    Housing
    Mounting
    Current,
    amp
    Voltage,
    V AC
    Switch
    Designation
    Electrical
    Phase
    For No.
    of Wires
    Housing Material
    Ht.
    Wd.
    Dp.
    Fasteners
    Included
    No. of
    Holes
    Hole
    Dia.
    Features
    Certification
    Specs. Met
    Each
    Each
    NEMA 1
    16120 to 277DPDT
    Single4Powder-Coated Steel8 5/16"7 11/16"3 15/16"No41/4"LED IndicatorETL Listed, CE Marked
    UL 924, UL 10087934N1100000008197N11000000
     

    Manual Transfer Switches

    Image of Product. Front orientation. Transfer Switches. Manual Transfer Switches, NEMA 1.
    Image of Product. Front orientation. Transfer Switches. Manual Transfer Switches, NEMA 1 with NEMA 3R Power Inlet Box.
    Image of Product. Front orientation. Transfer Switches. Manual Transfer Switches, NEMA 3R.

    NEMA 1

    NEMA 1 with NEMA 3R

    Power Inlet Box

    NEMA 3R

    If there’s a power outage, flip the toggle for each circuit on these switches to backup power. Each circuit can also be turned off completely. To prevent injury and damage to your generators, they are open transition, meaning the contacts disconnect from one power source before connecting to another. This is also known as break-before-make switching.
    Use them with a portable generator.
    NEMA 1—NEMA 1 switches should be used indoors.
    NEMA 1 with NEMA 3R Power Inlet Box—NEMA 1 switches with a power inlet box create a connection point between the switch and a portable generator. These switches should be used indoors. But their inlet box is rated NEMA 3R, so it can be mounted on the outside of an exterior wall.
    NEMA 3R—NEMA 3R switches can be used outdoors since they seal out rain, snow, and sleet.
    Key Lock—Switches with a key lock prevent unauthorized changes to the switch.
    Housing
    Mounting
    Max. Power,
    W
    Switching Current
    (No. of Switches)
    Circuit Breaker Breakthrough
    Current, amp
    Electrical
    Phase
    Housing Material
    Ht.
    Wd.
    Dp.
    Generator Connection
    NEMA Type
    Generator Connection
    California Std. Style
    Power Cord
    Lg., ft.
    Fasteners
    Included
    No. of
    Holes
    Hole
    Dia.
    Features
    Certification
    Specs. Met
    Each
    NEMA 1
     
    10 Circuits Controlled
    7,50030 amp @ 240V AC (1 DPDT)
    20 amp @ 240V AC (1 DPDT)
    15 amp @ 120V AC (6 SPDT)
    10,000SinglePowder-Coated Steel11 1/4"11 3/4"4 3/4"L14-30
    Yes51/4"UL Listed
    UL 1008, NEC Article 7024272N180000000
     
    NEMA 1 with NEMA 3R Power Inlet Box
     
    6 Circuits Controlled
    7,50020 amp @ 240V AC (1 DPDT)
    15 amp @ 120V AC (4 SPDT)
    10,000SinglePowder-Coated Steel12"8 3/4"6"L14-30
    10Yes51/4"UL Listed
    UL 1008, NEC Article 7024272N11000000
     
    10 Circuits Controlled
    7,50020 amp @ 240V AC (1 DPDT)
    20 amp @ 120V AC (2 SPDT)
    15 amp @ 120V AC (6 SPDT)
    10,000SinglePowder-Coated Steel11 1/4"11 3/4"4 3/4"L14-30
    10Yes51/4"UL Listed
    UL 1008, NEC Article 7024272N12000000
     
    NEMA 3R
     
    10 Circuits Controlled
    7,50020 amp @ 240V AC (1 DPDT)
    20 amp @ 120V AC (2 SPDT)
    15 amp @ 120V AC (6 SPDT)
    10,000SinglePowder-Coated Steel12 3/4"12"5"L14-30
    Yes51/4"Key LockUL Listed
    UL 1008, NEC Article 7024272N14000000
    12,50020 amp @ 240V AC (1 DPDT)
    20 amp @ 120V AC (2 SPDT)
    15 amp @ 120V AC (6 SPDT)
    10,000SinglePowder-Coated Steel12 3/4"12"5"CS6375Yes51/4"Key LockUL Listed
    UL 1008, NEC Article 7024272N16000000
     
    back to top