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Small rectangular relay suppressor module, grey plastic housing, terminal pins visible

Schneider Electric

Schneider Electric LAD4RCU RC transient suppressor 110-250 V AC

SKU CH-C9KN-5SW8V

An RC transient suppressor that protects relay contacts across 110 to 250 V AC circuits

  • Protects contacts from voltage spikes up to 250 V AC
  • Extends relay life by absorbing transient energy
  • Covers control circuits from 110 V to 250 V AC
  • Ready for immediate installation in new condition
  • Manufacturer listed since 2019 for proven availability

What this relay suppressor does

The Schneider Electric LAD4RCU is an RC transient suppressor built for 110 to 250 V AC circuits. It mounts on compatible contactors to absorb switching spikes and protect coil insulation. Electrical panels and motor-starter assemblies that need reliable surge damping are the typical fit.

Voltage range and installation limits

The device operates only within the stated 110 to 250 V AC window; outside this band it cannot clamp transients effectively. It is designed for direct mounting on the contactor coil terminals, so wiring length and terminal access dictate whether it can be fitted in a given enclosure.

Replaces bare coil operation

Fitting this suppressor replaces an unprotected coil that would otherwise absorb full switching transients. The upgrade is worth it when contactor chatter, coil overheating or premature insulation breakdown have been observed, or when a preventive maintenance plan calls for surge protection on every starter.

How it compares

Measured against everything we stock in Solenoid & Power Relays, at today’s prices. Recalculated every night.

Price $23.99
Cheaper than about 55% of the 125 comparable items (median $26.99).

Specifications

Product
Brand nameSCHNEIDER ELECTRIC

Questions about this item

Should I select the 110 V AC or the 250 V AC version for my control circuit?

This is a single unit rated for 110 to 250 V AC, so it covers the entire range without separate versions.

What does the 110 to 250 V AC rating mean once the suppressor is installed on a contactor coil?

It clamps transient voltage spikes generated when the coil de-energises, protecting the contactor and nearby electronics across the full rated range.

How does the RC network limit the peak voltage in practice?

The resistor-capacitor circuit absorbs the coil's inductive kickback, reducing the peak to a level the contactor insulation and adjacent components can withstand.

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