McMaster-Carr logo
    Filter by
    System of Measurement
    Frequency
    Output Electrical Connection
    Electrical Phase
    Input Electrical Connection
    Transformer Voltage Function
    Transformer Type
    Input Plug Connection
    Input Connection Type
    Signal Type
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Output Connection Type
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    59 Products

    Touch-Safe High-Inrush Panel-Mount Transformers

    Prevent accidental contact with live electrical connections—the screw terminals are covered or recessed. These transformers can handle momentary high-inrush current associated with contactors, solenoids, and relays. Also known as control transformers.
    Single Phase—Screw-Terminal Input and Output Connection
    Image of Product. Front orientation. Transformers. Touch-Safe High-Inrush Panel-Mount Transformers.
    Constant Voltage—When wired for constant voltage, transformers filter out voltage spikes and electrical noise.
    Isolated Coils—Isolated coils protect equipment from input voltage spikes.
    Voltage,
    V AC
    Input
    Output
    Power Output,
    VA
    Ht.
    Wd.
    Dp.
    Features
    Certification
    Each
    Step-Down Voltage
    120/24024502.8"3"3.3"Covered Terminals, Isolated CoilsUL Listed, C-UL Listed, CE Marked
    		0000000000000
    120/24024752.8"3"3.8"Covered Terminals, Isolated CoilsUL Listed, C-UL Listed
    		0000000000000
    120/240241003.1"3.4"3.8"Covered Terminals, Isolated CoilsUL Listed, C-UL Listed, CE Marked
    		0000000000000
    120/240241503.4"3.8"4.3"Covered Terminals, Isolated CoilsUL Listed, C-UL Listed
    		0000000000000
    120/240242504"4 1/2"4.6"Covered Terminals, Isolated CoilsUL Listed, CSA Certified, CE Marked
    		0000000000000
    120/240245004.7"5.3"5.8"Covered Terminals, Isolated CoilsUL Listed, C-UL Listed
    		0000000000000
    120/240241,0005.7"7"6.6"Covered Terminals, Isolated CoilsUL Listed, C-UL Listed, CE Marked
    		0000000000000
     
    Step-Down/Constant Voltage
    230/460/57524/115/2302504"4 1/2"4.8"Covered TerminalsUL Listed, C-UL Listed, CE Marked
    		0000000000000
    230/460/57524/115/2303004"4 1/2"5.3"Covered TerminalsUL Listed, C-UL Listed, CE Marked
    		0000000000000
    230/460/57524/115/2303504 1/2"5.3"5.4"Covered TerminalsUL Listed, C-UL Listed, CE Marked
    		0000000000000
    230/460/57524/115/2305004 1/2"5.3"6.6"Covered TerminalsUL Listed, C-UL Listed, CE Marked
    		0000000000000
    230/460/57524/115/2307506"6.4"7.4"Covered TerminalsUL Listed, C-UL Listed, CE Marked
    		0000000000000
    230/460/57524/115/2301,0006.3"6.8"7.8"Covered TerminalsUL Listed, C-UL Listed, CE Marked
    		0000000000000
     

    Low-Current Transformers

    Power low-voltage devices such as alarms and sensors.
    Single Phase—Plug Input and Screw-Terminal Output Connection
    Image of Product. NEMA 5-15. Front orientation. Transformers. Low-Current Transformers, Single Phase—Plug Input and Screw-Terminal Output Connection, NEMA 5-15, Auto Reset, Power-Indicating Light.
    Image of Specification. NEMA 5-15 Plug. Front orientation. NEMA 5-15. Low-Current Transformers.

    NEMA 5-15

    NEMA

    5-15

    Plug

    Voltage,
    V AC
    Input
    Input
    Output
    Power Output,
    VA
    Plug Connection
    Connection
    NEMA Type
    Ht.
    Wd.
    Dp.
    Features
    Certification
    Each
    Step-Down Voltage
    12024203-Blade Straight5-15
    		3.2"2.6"1.9"Auto Reset, Power-Indicating LightUL Listed
    		0000000000000
    12024403-Blade Straight5-15
    		3.6"2.6"2.1"Auto Reset, Power-Indicating LightUL Listed
    		000000000000
     

    Low-Current Panel-Mount Transformers

    Image of Product. Front orientation. Transformers. Low-Current Panel-Mount Transformers.
    Hardwire this transformer into your panel. Use it to power low-voltage devices such as alarms and sensors.
    Cannot Be Sold to California—Transformer cannot be sold to California due to local energy efficiency requirements.
    Input Voltage,
    V AC
    Output Voltage (Power Output)
    Ht.
    Wd.
    Dp.
    Cannot Be
    Sold To
    Each
    Single Phase—Wire Leads Input Connection and Screw-Terminal Output Connection
     
    Step-Down Voltage
    1208V AC (20 VA), 16V AC (30 VA), 24V AC (30 VA)2.2"2.3"2.9"California0000000000000
     

    Harsh-Environment High-Inrush Panel-Mount Transformers

    Image of Product. Transformer with Input and Output Fuse Block. Front orientation. Input Fuse Block. Harsh-Environment High-Inrush Panel-Mount Transformers, Output Fuse Block.
    Image of Product. Transformer with Input Fuse Block. Front orientation. Input Fuse Block. Harsh-Environment High-Inrush Panel-Mount Transformers, 12V AC Output Voltage.

    Transformer with

    Input and Output

    Fuse Block

    Transformer with

    Input Fuse Block

    Sealed coils protect against dust, dirt, oil, and moisture. These transformers can handle momentary high-inrush current associated with contactors, solenoids, and relays. Also known as control transformers. Choose a transformer with multiple output voltages to simultaneously power multiple devices that require different output voltages.
    Step-Down Voltage—Input and Output Fuse Block, Sealed Coils—Input and output fuse blocks are built-in and top-mounted to save panel space and allow quick installation.
    Voltage,
    V AC
    For Fuse
    Input
    Output
    Power Output,
    VA
    Ht.
    Wd.
    Dp.
    UL
    Class
    Type
    Overall
    Dia.
    Certification
    Each
    Single Phase—Screw-Terminal Input and Output Connection
     
    Step-Down Voltage—Input Fuse Block, Sealed Coils
    120/24012/24504"3"3.8"—Midget13/32"UL Listed, C-UL Listed
    		0000000000000
    120/24012/24754"3"4"—Midget13/32"UL Listed, C-UL Listed
    		000000000000
    120/24012/241004.4"3.4"4"—Midget13/32"UL Listed, C-UL Listed
    		0000000000000
    120/24012/241504.7"3.8"4.4"—Midget13/32"UL Listed, C-UL Listed
    		0000000000000
    120/24012/242505.3"4 1/2"4.6"—Midget13/32"UL Listed, C-UL Listed
    		0000000000000
    120/24012/245006"5.3"5.3"—Midget13/32"UL Listed, C-UL Listed
    		0000000000000
     
    Step-Down Voltage—Input and Output Fuse Block, Sealed Coils
    230/46024/115503.9"3"3 1/2"CCMidget13/32"UL Listed, C-UL Listed
    		0000000000000
    230/46024/115754.2"3.4"3.6"CCMidget13/32"UL Listed, C-UL Listed
    		0000000000000
    230/46024/1151004.2"3.8"3.6"CCMidget13/32"UL Listed, C-UL Listed
    		0000000000000
    230/46024/1151504.7"3.8"4"CCMidget13/32"UL Listed, C-UL Listed
    		0000000000000
    230/46024/1152005.3"4 1/2"4.4"CCMidget13/32"UL Listed, C-UL Listed
    		0000000000000
    230/46024/1152504.1"4 1/2"4.4"CCMidget13/32"UL Listed, C-UL Listed
    		0000000000000
    230/46024/1153005.9"5.3"5.2"CCMidget13/32"UL Listed, C-UL Listed
    		0000000000000
    230/46024/1153505.9"5.3"5.2"CCMidget13/32"UL Listed, C-UL Listed
    		0000000000000
    230/46024/1155006"5.3"5.7"CCMidget13/32"UL Listed, C-UL Listed
    		0000000000000
     

    Circuit Board Transformers

    Convert AC voltages without taking up too much space on your circuit board. These transformers are smaller than those with electrical wiring. Solder pin terminals mount directly through circuit board holes.
    Single Phase—Solder Pin Terminal Input and Output Connection
    Image of Product. Front orientation. Transformers. Circuit Board Transformers.
    Voltage,
    V AC
    Input
    Output
    Power Output,
    VA
    Ht.
    Wd.
    Dp.
    Pin
    Lg.
    Certification
    Each
    Step-Down Voltage
    115/23012/241.11.3"1.4"1.1"0.23"UL Recognized Component, C-UL Recognized Component
    		0000000000000
    115/23012/242.41.2"1.4"1.1"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23012/2461.3"1.6"1.3"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23012/24121.5"1.9"1.6"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23012/24201.4"2.3"1.9"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23012/24361.6"2.6"2.2"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23024/481.11.3"1.4"1.1"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23024/482.41.2"1.4"1.1"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23024/4861.3"1.6"1.3"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23024/48121.5"1.9"1.6"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23024/48201.4"2.3"1.9"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
    115/23024/48361.6"2.6"2.2"0.23"UL Recognized Component, C-UL Recognized Component
    		000000000000
     

    Outlet-Box/Panel-Mount High-Inrush Transformers

    Use the included mounting plate to mount these transformers to a panel. They can handle momentary high-inrush current associated with equipment start-up. Also known as control transformers, they are used in heating, ventilation, and air conditioning control circuits.
    Single Phase—Wire Leads Input and Output Connection
    Image of Product. Front orientation. Transformers. Outlet-Box/Panel-Mount High-Inrush Transformers.
    Voltage,
    V AC
    Input
    Output
    Power Output,
    VA
    Wire Lead
    Lg.
    Ht.
    Wd.
    Dp.
    Certification
    Each
    Step-Down Voltage
    12024406"2.8"3.7"2 1/2"UL Recognized Component
    		0000000000000
    120/208/24024406"2.8"3.7"2 1/2"UL Recognized Component
    		000000000000
    208/24024406"2.8"3.7"2 1/2"UL Recognized Component
    		000000000000
     

    High-Inrush Panel-Mount Transformers

    These transformers can handle momentary high-inrush current associated with contactors, solenoids, and relays. Also known as control transformers.
    Single Phase—Screw-Terminal Input and Output Connection
    Image of Product. Front orientation. Transformers. High-Inrush Panel-Mount Transformers, Single Phase—Screw-Terminal Input and Output Connection.
    Voltage,
    V AC
    Input
    Output
    Power Output,
    VA
    Ht.
    Wd.
    Dp.
    Certification
    Each
    Step-Down Voltage
    120/24012/24502.8"3"3.3"UL Listed, C-UL Listed
    		0000000000000
    120/24012/24752.8"3"3.8"UL Listed, C-UL Listed
    		000000000000
    120/24012/241003.1"3.4"3.8"UL Listed, C-UL Listed
    		000000000000
    120/24012/241503.4"3.8"4.3"UL Listed, C-UL Listed
    		0000000000000
    120/24012/242504"4 1/2"4 1/2"UL Listed, C-UL Listed
    		0000000000000
    120/24012/243504"4 1/2"5.3"UL Listed, CSA Certified
    		0000000000000
    120/24012/245004.6"5.3"5.8"UL Listed, C-UL Listed
    		0000000000000
    120/24012/247504.7"5.3"7"UL Listed, C-UL Listed
    		0000000000000
     
    Single Phase—Screw-Terminal Input and Output Connection with Fuse Block
    Image of Product. Front orientation. Transformers. High-Inrush Panel-Mount Transformers, Single Phase—Screw-Terminal Input and Output Connection with Fuse Block.
    Input and output fuse blocks are built-in and top-mounted to save panel space and allow quick installation.
    Voltage,
    V AC
    For
    Fuse
    Input
    Output
    Power Output,
    VA
    Ht.
    Wd.
    Dp.
    Type
    Overall
    Dia.
    Certification
    Each
    Step-Down Voltage
    120/24012/24504"3"3.6"Midget13/32"UL Listed, C-UL Listed
    		00000000000000
     

    DIN-Rail/Panel-Mount High-Inrush Transformers

    Image of ProductInUse. Front orientation. Transformers. DIN-Rail/Panel-Mount High-Inrush Transformers.
    Use with DIN-rail to install wherever you need these transformers or mount them to a panel. They can handle momentary high-inrush current associated with equipment start-up.
    Single Phase—Screw-Terminal Input and Output Connection
    Voltage,
    V AC
    Input
    Output
    Power Output,
    VA
    Ht.
    Wd.
    Dp.
    For DIN
    Rail Size, mm
    Certification
    Each
    Step-Down Voltage
    23024633 1/2"3.4"3.9"35UL Recognized Component, C-UL Recognized Component, CE Marked
    		00000000000000
    230241004"3.4"3.9"35UL Recognized Component, C-UL Recognized Component, CE Marked
    		0000000000000
    230241604.1"3.9"4.2"35UL Recognized Component, C-UL Recognized Component, CE Marked
    		0000000000000
    230242504.7"3.9"4.2"35UL Recognized Component, C-UL Recognized Component, CE Marked
    		0000000000000
     
    back to top