The LAD4RCUTQ is a suppressor module from the TeSys D range, using an RC circuit to snub voltage spikes on the coil of a contactor or relay. It comes as a set of 10 modules, each one the same part. The side-mount, clip-on design means it snaps right onto the contactor without extra brackets — no panel real-estate penalty, just a quick install during build or retrofit.
What the ratings tell you
The RC circuit is a passive resistor-capacitor network that limits the voltage rise rate across the coil contacts, reducing arcing and electromagnetic interference. For a 110-240 VAC coil, that's the sweet spot — it works across both common control voltages without needing a different module for each. The peak voltage rating of 3 Uc means the snubber clamps transients up to three times the control voltage, which covers most switching surges you'll see in a panel. That's standard for indoor panel use — no special derating needed unless you're mounting in a hot enclosure near a drive or transformer. If your panel ambient pushes past 55 °C, you'll want to check the contactor's own derating curve, not just the snubber's.