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LAD4DDL
FREE WHEELING DIODE 24-250VAC D09-D38 Schneider
Schneider Electric LAD4DDL – Free Wheeling Diode 24-250V D09-D38
The Schneider Electric LAD4DDL is a TeSys D suppressor module (free wheeling diode) designed to protect DC-operated contactor and relay coils against transient overvoltage generated when the coil is de-energized. It clips directly onto compatible TeSys D contactors and control relays, reducing electrical noise and extending the life of switching devices. The module uses flywheel diode technology and is suitable for control circuit voltages from 5 to 600 VDC.
| Manufacturer | Schneider Electric |
|---|---|
| Model Number | LAD4DDL |
| Product Series | TeSys D / TeSys Deca |
| Device Short Name | LAD4 |
| Product Type | Suppressor Module |
| Suppressor Technology | Flywheel Diode |
| Application | Coil surge suppression and transient voltage protection |
| Mounting Location | Side Mounted |
| Mounting Method | Clip-On |
| Control Circuit Type | DC Coil Protection |
| Compatible Contactor Range | LC1D09 to LC1D38 |
| Compatible Reversing Contactors | LC1DT20 to LC1DT40 |
| Compatible Control Relays | CAD32, CAD50 |
| Product Compatibility | 3P and 4P TeSys D Contactors and Control Relays |
| Control Circuit Voltage (Uc) | 5 to 600 VDC |
| Maximum Peak Voltage | 1 × Uc |
| Protection Function | Suppresses coil switching transients |
| Technology Type | Free Wheeling Diode |
| Coil Compatibility | DC Operated Coils |
| Voltage Limitation | Limits induced reverse voltage during coil de-energization |
| Operating Principle | Diode connected across coil terminals |
| Mounting Type | Clip-On |
| Installation Position | Side of Contactor / Relay |
| Product Weight | 0.012 kg |
| Approximate Shipping Weight | 0.005 to 0.012 kg |
| Housing Material | Industrial Grade Thermoplastic |
| Color | White / Light Grey |
| Retention Method | Mechanical Clip Engagement |
| Package Height | 0.5 cm |
| Package Width | 4.0 cm |
| Package Length | 5.5 cm |
| Compact Side-Mount Design | Yes |
| Increases Contactor Width | No Significant Change |
| IP Rating | IP2X |
| Operating Temperature | -25°C to +55°C |
| Storage Temperature | -40°C to +80°C |
| Recyclability Potential | 20% |
| Carbon Footprint | Approximately 0.1 kg CO₂ eq. |
| RoHS Compliant | Yes |
| REACh Compliant | Yes |
| Green Premium Product | Yes |
| Standard / Certification | Status |
| IEC 60947-5-1 | Compliant |
| EN 60947-5-1 | Compliant |
| UL 60947-5-1 | Certified |
| CSA C22.2 No. 60947-5-1 | Certified |
| GB/T 14048.5 | Compliant |
| UL Approval | Yes |
| CSA Approval | Yes |
| Coil Protection | Protects against voltage spikes during coil release |
| Arc Suppression | Reduces switching transients |
| Electronic Equipment Protection | Minimizes interference to control circuits |
| Contact Life Improvement | Helps reduce electrical stress on contacts |
| EMC Improvement | Reduces electromagnetic disturbances |
| Voltage Clamping | Limited to approximately the coil supply voltage |
| Compatible Device | Series |
| LC1D09 | TeSys D |
| LC1D12 | TeSys D |
| LC1D18 | TeSys D |
| LC1D25 | TeSys D |
| LC1D32 | TeSys D |
| LC1D38 | TeSys D |
| LC1DT20 | TeSys D Reversing Contactor |
| LC1DT25 | TeSys D Reversing Contactor |
| LC1DT32 | TeSys D Reversing Contactor |
| LC1DT40 | TeSys D Reversing Contactor |
| CAD32 | TeSys Control Relay |
| CAD50 | TeSys Control Relay |
| Flywheel Diode Technology | Provides effective coil surge suppression |
| Wide Voltage Range | 5 to 600 VDC |
| Compact Design | Clips directly onto contactor side |
| Tool-Free Installation | Fast clip-on mounting |
| Enhanced Coil Protection | Protects against back-EMF voltage spikes |
| Improved Reliability | Helps extend control circuit life |
| Maintains Contactor Dimensions | Minimal space requirement |
| Industrial Duty Construction | Suitable for industrial automation environments |
| Global Certifications | UL, CSA, IEC compliant |
| Maintenance Free | No adjustment required |