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Access Door (4)
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Relay (173)
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Functional Devices

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Product Image of 25" x 25" x 9-1/2" Metal Housing, NEMA 1 w/ Key Latch
$562.05 each
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Product Image of 18" x 18" x 7" Metal Housing, NEMA 1 w/ SP4403L Sub-Panel
$286.10 each
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Product Image of 4" x 18" Mounting Snap Track
$10.50 each
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Product Image of BACnet MS/TP Network Relay Device, One Binary Output, Two Binary Inputs, 24 Vac/dc or 208-277 Vac Power Input, 2.75" Track Mount
$212.11 each
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Product Image of Power Panel Relay, 30A DPST-N/C w/ 24 Vac/DC Coil, 2-3/4" Track Mount
$100.15 each
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Product Image of Enclosed Dual 100VA UL Class 2 Power Supply, 120 Vac to 24 Vac & 24 VDC
$506.60 each
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Product Image of Enclosed Low Input/Optoisolated Relay, 20A DPDT, 120 Vac/dc Power Input, 5-25 Vac/dc Control Input, Hi/Lo Voltage Separation, NEMA 1 Housing
$143.40 each
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Product Image of 4-1/4" x 7" x 2" Plastic Housing, NEMA 1, 3/4" MNPT Nipple, Gray Lid
$46.94 each
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Product Image of Enclosed Power Relay 20A 3PST-N/C w/ 208-277 Vac Coil, NEMA 1 Housing
$166.10 each
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Product Image of Enclosed Power Relay, 20A SPDT + Override, 24 Vac/dc/208-277 Vac Coil, Hi/Lo Voltage Separation, NEMA 1 Housing
$85.50 each
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Product Image of 25" x 25" x 9-1/2" Metal Housing, NEMA 1 w/ SP5504L Sub-Panel
$674.45 each
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Product Image of Current Transducer, Split Core, Analog, 4-20 mA, 0-50A, Wire Leads
$91.25 each
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Product Image of Enclosed Single 40 VA Power Supply, 10 Amp Main Breaker, (120 Vac to 24 Vac Enclosure)
$151.65 each
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Product Image of Dry Contact Panel Relay, 30A DPDT, Class 2 Dry Contact Input, 120 Vac Input, 4" Track Mount
$104.30 each
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Product Image of Enclosed Polarized Relay, 10A SPDT w/ 12 Vac/DC Coil, Red Housing
$53.70 each
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Product Image of DIN Rail Mount DC Power Supply Single Switching, 100-240 Vac to 24-28 Vdc, 2.5 Amp
$97.50 each
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Product Image of 20" x 16-1/6" x 7-3/4" Metal Housing, NEMA 1 w/ SP4604S Sub-Panel
$609.35 each
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Product Image of NEMA 1 Metal Enclosure w/ Coin Latch (18" x 18" x 7")
$343.29 each
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Product Image of EnOcean 902 MHz Wireless Vacancy / Occupancy Sensor - Wall Mount
$189.59 each
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Product Image of AHU Fan Safety Alarm & General Purpose Logic Circuit, 24 Vac/dc Power Input, 4 Alarm Inputs w/ N/O Outputs, 2.75" Track Mount
$118.20 each
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Product Image of Transducer & Relay Combination, 5A SPDT, 10-30 Vac/dc Coil, Analog, 0-5A, 0-5 Vdc/0-10 Vdc Output, NEMA 1 Housing
$91.25 each
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Product Image of Enclosed Low Input/Optoisolated Relay, 20A SPDT, 120 Vac Power Input, 5-25 Vac/dc Control Input, Hi/Lo Voltage Separation, NEMA 1 Housing
$55.15 each
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Product Image of 4-1/4" x 7" x 2" Plastic Housing, NEMA 1, 3/4" MNPT Nipple
$42.35 each
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Product Image of Enclosed Power Relay, 20A SPST + Override, 24 Vac/dc/208-277 Vac Coil, Hi/Lo Voltage Separation, NEMA 1 Housing
$63.25 each
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Product Image of Enclosed Pilot Relay, 10A SPDT-N/C + Override + Monitor w/ 10-30 Vac/DC/208-277 Vac Coil, NEMA 1 Housing
$57.05 each
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Product Image of 19.00" H x 11.75" W x 0.25" Perforated Steel Sub-Panel, For Use with MH3800
$142.75 each
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Product Image of Dry Contact Panel Relay, 30A 3PDT, Class 2 Dry Contact Input, 120 Vac Input, 4" Track Mount
$155.05 each
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Product Image of 18" x 18" x 7" Metal Housing, NEMA 1 w/ Key Latch
$270.75 each
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Product Image of Current Switch and Relay Combination, 5A SPDT Relay w/ 10-30v Coil, Adj, 0.125-5A
$117.75 each
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Product Image of 4" x 10" Mounting Snap Track
$8.10 each
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Product Image of Transformer, Made in USA, 50VA, 120 to 24 Vac, Foot and Single Threaded Hub Mount
$38.35 each
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Product Image of Enclosed Pilot Relay 10 Amp, SPST-N/O & Override & Monitor w/ 10-30 Vac/dc/208-277 Vac Coil
$68.55 each
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Product Image of 23.00" H x 11.75" W x 0.25" Perforated Steel Sub-Panel, For Use with MH3800
$154.20 each
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Product Image of Power Panel Relay, 30A 3PDT w/ 120 Vac Coil, 4" Track Mount
$102.30 each
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Product Image of Current Switch and Relay Combination, 10A, SPDT Relay w/ 10-30v Coil, Adj, 0.5-10A
$80.20 each
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Product Image of Enclosed Pilot Relay 10 Amp, SPDT & Override w/ 10-30 Vac/dc/208-277 Vac Coil
$100.98 each
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Product Image of 19.00" H x 11.75" W x 0.13" Polymetal Sub-Panel, For Use with MH3800
$139.45 each
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Product Image of Enclosed AHU Fan Safety Alarm Circuit Logic Board, 24 Vac/DC Power Input, 6 Alarm Inputs w/ N/C Outputs, NEMA 1 Housing
$153.25 each
Out of Stock
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Product Image of 23.00" H x 11.75" W x 0.13" Polymetal Sub-Panel, For Use with MH3800
$139.45 each
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Product Image of AHU Fan Safety Alarm Circuit, 24 VAC/DC, 4 Alarm Inputs with N/C Outputs, NEMA 1
$131.20 each
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Product Image of AHU Fan Safety Alarm Circuit, 24 VAC/DC, 2 Alarm Inputs with N/C Outputs, NEMA 1
$101.20 each
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More About Functional Devices
Functional Devices, Inc. has been designing and manufacturing quality electronic devices in the USA since 1969. Current product offerings include relays, current sensors, power control, enclosures, power supplies, transformers, and accessories. Functional Devices has established itself as a leader in the HVAC, Building Controls, Energy Management, Energy Savings, Lighting Controls, and Wireless industries.
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