CDL4UEDD4 Double Level Terminal Block with Diode Circuit (DD4 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, and reverse current protection. The inbuilt diode circuit helps protect sensitive control components and improves circuit reliability in industrial automation systems.
CDL4UEDD4 works as a double level screw clamp terminal block with inbuilt DD4 diode circuit configuration. It provides four connection points in a compact double level body while integrating 1N4007 diode-based circuit protection inside the terminal block. The inbuilt diode controls current flow in one direction, helping prevent reverse current damage and supporting lamp testing or signal conditioning functions. This reduces the need for separate external diode assemblies and simplifies control circuit wiring.
CDL4UEDD4 improves circuit safety by integrating the diode protection circuit directly inside the terminal block. This helps prevent reverse voltage damage, improves control circuit protection, and reduces wiring mistakes caused by external diode assemblies. Its compact structured design also improves maintenance visibility and safer troubleshooting in industrial control panels.
CDL4UEDD4 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 housed inside the terminal body for reliable long-term industrial performance.
Using CDL4UEDD4 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 | CDL4UEDD4 |
| Product Type | Double Level Terminal Block with Electronic Component |
| Configuration | DD4 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 |
CDL4UEDD4 is widely used in:
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