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Square D TeSys Deca RC Transient Suppressor Module, 110-250 VAC
The Square D TeSys Deca RC Transient Suppressor Module is a clip-on, side-mounted accessory engineered for LC1D09-D38 and LC1DT20-DT40 contactors, as well as CAD32 and CAD50 control relays. Built for 110-250 V AC control circuit voltage (Uc), it provides RC-type transient protection that limits surge voltage to 3 Uc max, helping shield control circuits from switching transients. Backed by UL and CSA certification and compliant with UL, CSA, IEC, EN, and GB/T 60947-5-1 standards, it is built for commercial and industrial control panel duty.
Key Features
- Control Circuit Voltage: Rated for 110-250 V AC (Uc) control circuits.
- RC Suppressor Technology: Limits transient voltage to 3 Uc max for reliable switching surge protection.
- Clip-On Side Mounting: Mounts directly to the side of compatible contactors and control relays for a compact footprint.
- Broad Compatibility: Fits 3P LC1D09...D38, 4P LC1D098...D258, and 4P LC1DT20...DT40 contactors, plus CAD32 and CAD50 control relays.
- IP2X Degree of Protection: Rated per IEC 60529 for protection against solid foreign objects.
- Country of Origin: Manufactured in France.
Certifications & Compliance
- UL Listed
- CSA Certified
- Complies with UL 60947-5-1, CSA C22.2 No 60947-5-1, IEC 60947-5-1, EN 60947-5-1, and GB/T 14048.5
- RoHS EUR Compliant (In Scope)
Technical Specifications
- Toxic Heavy Metal Free: Yes
- Warranty: 18 months
- Warranty Period: 18 months
- Sustainable Packaging: Yes
- Mercury Free: Yes
- Packaging Without Single Use Plastic: No
- Tier Id: 1
- ROHS Eur In Scope: Yes
- Recycled Metal Content At Cr Level: 0 %
- China ROHS Label: 1
- Serviceability: No
- With Recycled Cardboard: Yes
- WEEE Product Category: 5
- China ROHS In Scope: No
- Return Indicator: Y
- Take Back: No
- Tier: 1
- Returnability: Yes
- Reach Free Shvc: Yes
- Ambient Air Temperature For Storage: -40-80 °C
- WD Status: 1 - GSC certified
- Weee Label: The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins.
- Country of Origin: France
- Legacy WEEE Scope: In
- China ROHS Regulation: Pro-active China RoHS declaration (out of China RoHS legal scope)
- Packaging Made With Recycled Cardboard: Yes
Typical Applications
- Contactor and Control Relay Transient Protection
- Commercial and Industrial Control Panels
- TeSys Deca Contactor and CAD Relay Assemblies
- Motor Control Centers and Machine Control Systems
Why Square D?
Square D by Schneider Electric backs the TeSys Deca suppressor module with UL and CSA certification, RoHS compliance, and adherence to UL, CSA, IEC, EN, and GB/T 60947-5-1 standards. Manufactured in France under Schneider Electric's quality processes, this module delivers dependable transient voltage protection for demanding industrial and commercial control applications.
Manufacturer Resources
Product Specs
- Product Type:
- Transient Suppressor Module
- Voltage Rating:
- 110-250 VAC
- Configuration:
- Side Mount
- Standards:
- UL 60947-5-1
- Listing:
- UL Listed
- Department:
- Electrical
- Product Group:
- Circuit Protection
- Product Subgroup:
- Surge Protection
Square D LAD4RCU – Frequently Asked Questions
1) Which TeSys Deca contactors does the LAD4RCU suppressor module fit?
The LAD4RCU clips onto the side of 3-pole LC1D09 through D38 contactors, 4-pole LC1D098 through D258, 4-pole LC1DT20 through DT40, and CAD32 and CAD50 control relays. Outside those frames it will not clip on, so a larger TeSys frame needs the suppressor sized for that frame.
2) Will the LAD4RCU work on a 24 VAC or 120 VDC coil circuit?
No. The LAD4RCU is rated 110-250 V AC control circuit voltage (Uc) only. A 24 V coil or any DC coil circuit needs a different suppressor rated for that voltage and type.
3) Is this suppressor module acceptable for a UL 508A listed control panel?
The LAD4RCU is UL Listed and CSA Certified, and complies with UL 60947-5-1, CSA C22.2 No 60947-5-1, IEC 60947-5-1, EN 60947-5-1 and GB/T 14048.5. Those are the control circuit device standards a panel inspector asks for on this kind of accessory.
4) What is the Eaton equivalent of the Square D LAD4RCU transient suppressor?
The closest cross-brand counterpart is the Eaton Freedom transient suppressor kit for NEMA 00-2 and IEC A-K starters and contactors. Both are transient suppressor accessories that mount to a contactor to absorb switching surges, but they are tied to different contactor lines: the Square D LAD4RCU is an RC-type module that clips to the side of LC1D09-D38 and LC1DT20-DT40 TeSys Deca contactors and CAD32 and CAD50 control relays, rated for 110-250 V AC control circuits. The Eaton kit is built for Eaton Freedom series NEMA 00-2 and IEC A-K frames. Pick the one that matches the contactor already in the panel rather than treating them as drop-in swaps for each other.
5) How much does an RC suppressor module actually clamp the transient on a contactor coil?
RC-type suppression on the LAD4RCU limits the surge to 3 Uc maximum. On a 250 V control circuit that is the worst case the coil switching transient is held to, which is what keeps PLC inputs and nearby electronics in the panel from seeing the spike.
6) Does the suppressor module take up another slot in the control panel?
No extra DIN rail width is needed in the usual sense. The module is a clip-on side mount, so it attaches to the side of the contactor or relay rather than mounting separately, keeping the assembly compact in the panel.
7) Should I pick an RC suppressor or a varistor type for contactor coil protection?
The LAD4RCU is the RC (resistor-capacitor) type, which damps the switching transient to 3 Uc max and suits AC control circuits in the 110-250 V band. Varistor modules clamp hard at a fixed voltage instead and are the usual choice where a very fast clamp is wanted, including DC coils. For an AC TeSys Deca coil in that voltage range, the RC module is the direct-fit accessory.
8) Which contactor suppressor should I spec if the job drawing calls for UL 60947-5-1 compliance?
The Square D LAD4RCU is UL Listed and built to UL 60947-5-1, along with CSA C22.2 No 60947-5-1, IEC 60947-5-1, EN 60947-5-1, and GB/T 14048.5, so it answers a drawing note calling out the 60947-5-1 control-circuit-device standard directly. Among cross-brand options, the Eaton Freedom transient suppressor kit for NEMA 00-2 and IEC A-K starters is the counterpart to look at if the panel is built on Eaton Freedom contactors, but the LAD4RCU is the one to carry on a TeSys Deca assembly where the standards callout has to be satisfied on the submittal.
9) Can the LAD4RCU be used in an unheated outdoor enclosure or cold warehouse?
For storage the module is rated -40 to 80 degrees C. It also carries IP2X protection per IEC 60529, which guards against solid foreign objects but not water, so it belongs inside an enclosure that handles the environment.
10) Is the Square D LAD4RCU RoHS compliant and where is it made?
It is RoHS EUR compliant (in scope), mercury free and toxic heavy metal free, and it ships in packaging made with recycled cardboard. Manufacturing is in France. For EU sites, note it falls under WEEE category 5 and must go through waste collection rather than general refuse.
11) Can the LAD4RCU be repaired or rebuilt if it fails?
No. Square D lists the module as non-serviceable, so a failed suppressor is replaced as a unit rather than opened up. If you are standardizing a motor control center, keeping a few LAD4RCU modules on the shelf is the practical approach.
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Does the Square D LAD4RCU come with a warranty?
Absolutely. The Square D LAD4RCU is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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