CDL4UEDD3 Double Level Terminal Block with Diode Circuit (DD3 Configuration) is used in industrial electrical and control circuits where wire connection with built-in diode protection and lamp testing functionality is required. It is specially designed for applications such as relay circuits, PLC output protection, signal isolation, interlocking circuits, lamp indication circuits, and reverse current protection systems. The inbuilt diode circuit helps protect sensitive electrical components and improves control circuit reliability in industrial automation systems.
CDL4UEDD3 works as a double level screw clamp terminal block with inbuilt DD3 diode circuit configuration. It provides 4 connection points in a compact double level body while integrating 1N4007 diode-based circuit protection inside the terminal block. The inbuilt diode allows one-way current flow and blocks reverse current, helping protect relay coils, PLC outputs, lamps, and control circuits from reverse polarity damage. This reduces the need for separate external diode assemblies and simplifies electrical panel wiring.
CDL4UEDD3 improves circuit safety by integrating the diode protection circuit directly inside the terminal block, helping prevent reverse voltage damage in control circuits. This improves wiring reliability, reduces wrong component installation risk, and makes troubleshooting easier in industrial control panels. Its structured double-level design also improves maintenance visibility and safer wiring access.
CDL4UEDD3 is manufactured using high-quality Polyamide insulated housing that provides strong mechanical durability, flame resistance, and excellent electrical insulation performance. Its M3 screw clamp system ensures secure conductor holding and low contact resistance, while the integrated diode circuit is safely enclosed inside the terminal body for reliable long-term industrial performance.
Using CDL4UEDD3 improves panel wiring by combining wire connection + diode protection + circuit function integration in one compact terminal block. This reduces separate external diode wiring, saves panel space, improves installation speed, and creates a cleaner and more professional control panel layout in industrial automation systems.
| Specification | Details |
|---|---|
| Model Number | CDL4UEDD3 |
| Product Type | Double Level Terminal Block with Electronic Component |
| Configuration | DD3 Diode Circuit |
| Connection Type | Screw Clamp |
| Product Function | With Electronic Components – Diode / Resistor |
| Number of Levels | 2 Level |
| Number of Connections | 4 |
| Rated Voltage (IEC) | 500 V |
| Rated Current (IEC) | 32 A |
| Rated Voltage (UL) | 600 V |
| Rated Current (UL) | 35 A |
| Rated Voltage (CSA) | 300 V |
| Rated Current (CSA) | 25 A |
| Conductor Size Solid | 0.2 – 6 mm² |
| Conductor Size Stranded | 0.2 – 4 mm² |
| Ferrule Capacity | 0.2 – 4 mm² |
| Twin Ferrule Capacity | 0.2 – 2.5 mm² |
| AWG Range | 22 – 10 AWG |
| Wire Stripping Length | 9 mm |
| Tightening Torque | 0.5 Nm |
| Screw Size | M3 |
| Wire Entry Orientation | Side Entry |
| Housing Material | Polyamide |
| Width (Thickness) | 6 mm |
| Length | 55.5 mm |
| Height (DIN 32 Rail) | 60.3 mm |
| Mounting Type | DIN 32 / DIN 35 / DIN 35-15 Rail |
| Operation Type | Screwdriver Operated |
| Diode Type | 1N4007 |
| Diode Reverse Voltage | 1000 V |
| Diode Forward Current | 1 A |
| Colour | Grey |
CDL4UEDD3 is widely used in:
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