Protect electronic devices from harmful electromagnetic interference (EMI) that’s often caused by power supplies, computers, motors, and lighting. Also known as noise filters. A retractable terminal cover guards you from live circuits and allows easy access to terminals for maintenance. All of these filters have passed strict U.S., Canadian, European Union, and international safety standards.

When selecting a filter, make sure the maximum current can handle the requirements of your device.

Use DIN-rail mount filters in industrial cabinets or electrical panels.

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.

Change AC voltage to DC voltage and bring power to electronic devices while protecting them from harmful electromagnetic interference (EMI). Even with their built-in power supply, these connectors have the same overall footprint as those without a power supply. All are for use with standard IEC power cords. Commonly used to convey power from wall outlets, you won’t have to wire your devices to an external power source. Instead, wire these connectors into your device with the terminals on the back of each connector.

For fast wire connections, these connectors have quick-disconnect terminals. The terminals slide together with the quick-disconnect terminals on your wiring and are easily disconnected by hand, but still provide a strong hold.

All of these connectors use switching regulation, which means they produce the stated voltage despite fluctuations in your input power and the power being drawn by your system, and they won’t become too hot. If you exceed the maximum voltage or load, the connectors will shut down to protect both the power supply and the connected device. They also meet the voltage requirements for use in a SELV (separated extra low voltage) circuit.

These connectors meet U.S. and international standards for safety. They also meet UL 94 V-0, which means they self-extinguish within 10 seconds if they catch fire, and won’t spread the fire by dripping. All have Class I shock protection—they're insulated and have a protective ground to prevent electrical shocks.

Maximum output noise is also known as ripple noise. When power supplies convert AC voltage to DC voltage, some noise from the AC voltage will carry into the output. While this noise won't affect most applications, it can interfere with other signals in extremely sensitive audio equipment and high-precision measuring and testing equipment. The lower the output noise, the less interference it creates.

Power factor and efficiency give you a sense for how efficiently these connectors draw AC power and convert it into DC power, which ultimately affects your operating cost. The closer the power factor is to 1, and the higher the efficiency percentage, the lower the operating cost. The more efficient the power supply, the cooler it runs.

For technical drawings and 3-D models, click on a part number.

Bring power into electronic devices while protecting them from harmful electromagnetic interference (EMI). All of these connectors are compatible with standard IEC power cords. Often used to convey power from wall outlets, there’s no need to wire your devices to an external power source. Instead, wire these connectors into your device with the terminals on the back of each connector. When selecting a connector, make sure the current is at or slightly above the requirements of your device for the best EMI-filtering performance.

All of these connectors meet U.S. and international standards for safety. They also meet UL 94 V-0, which means they self-extinguish within 10 seconds if they catch fire, and won’t spread the fire by dripping. Rated IP40, these connectors prevent objects larger than 1 mm, such as wire, from making contact with a live circuit and shocking you. They also include shock protection. Class I shock protection means they're insulated and have a protective ground to prevent electrical shocks. Class II shock protection means there are two levels of insulation to prevent electrical shocks.

Screw-on connectors mount to devices with any panel thickness, as long as you can drill mounting holes into the device. Snap-in connectors mount to devices with snap-in tabs—no fasteners needed—but require a specific panel thickness and a precisely cut hole for secure mounting.

Solder terminal wire connections are more secure than quick-disconnect terminal connections. Quick-disconnect terminal wire connections are faster to wire than solder terminal connections. The terminals slide together with the quick-disconnect terminals on your wiring and are easily disconnected by hand, but still provide a strong hold.

For technical drawings and 3-D models, click on a part number.

With a built-in switch, these connectors run power to appliances, power supplies, and other electronic devices while also filtering damaging EMI (electromagnetic interference). Instead of hardwiring your devices, add these connectors and plug in a standard IEC power cord. Wire these connectors using the quick-disconnect terminals; they slide together with matching terminals on your wiring for a secure hold that's also easy to pull apart to make repairs. The terminals are on the back of the connector, so the wiring stays inside your device. For the best EMI-filtering performance, choose a connector with a current rating at or slightly above your device's current requirements.

Rated IP40, these connectors prevent objects larger than a 1 mm-wd. wire from touching internal components and accidentally shocking you. With Class I shock protection, they’re insulated and have a protective ground. Some have a fuse drawer to hold a fuse, which prevents short circuits and circuit overloads from damaging your device. The fuses are sold separately.

These connectors meet UL 94 V-0, which means they self-extinguish within 10 seconds if they catch fire, and won’t spread the fire by dripping. They’re also UL and C-UL recognized components, ENEC marked, and CSA certified, so they meet stringent safety standards.

Screw-on connectors mount to housings of any thickness, as long as you can drill mounting holes into them. Snap-in connectors have tabs on the side to mount to housings without using fasteners. But, they require a specific panel thickness and precisely cut hole for secure mounting.

Connectors with an indicator light on their switch show if your device is powered on.

Shielded connectors protect against interference from nearby equipment.

For technical drawings and 3-D models, click on a part number.