DDFL4U is a compact and reliable 4 sq.mm double level fuse terminal block designed for safe circuit protection, organized wiring, and efficient electrical distribution in industrial control systems. This terminal block combines fuse protection and feed-through connectivity into a single compact module, making it ideal for electrical panels, automation systems, machine wiring, switchgear assemblies, instrumentation cabinets, and industrial distribution applications.
The double-level design integrates two electrical functions within one housing. The upper level contains a fuse carrier arrangement, while the lower level operates as an independent feed-through terminal connection. This integrated configuration eliminates the requirement for additional terminal blocks and helps reduce panel space consumption.
DDFL4U is developed to improve wiring efficiency and provide dependable overcurrent protection in industrial environments. The fuse section helps isolate faults and protect downstream equipment from electrical overload conditions while maintaining organized conductor routing inside the enclosure.
This terminal block supports standard 5 × 20 mm cartridge glass fuses, allowing easy fuse replacement and broad compatibility with industrial protection systems. The fuse carrier mechanism is positioned for convenient access during inspection and maintenance activities.
The product uses screw clamp connection technology, providing secure conductor retention and dependable electrical continuity. Screw clamp termination remains widely used in industrial applications because it delivers stable conductor holding performance and long-term reliability under continuous electrical loading.
Installation is performed using a standard screwdriver, allowing quick conductor termination and straightforward servicing. The screw-operated clamping system helps maintain stable contact pressure and reduces the possibility of conductor loosening during operation.
DDFL4U features side-entry conductor insertion, improving cable routing and installation accessibility inside compact electrical cabinets. Side-entry wiring supports cleaner panel layouts and simplifies future maintenance procedures.
Designed for DIN rail mounting, the terminal block supports installation on DIN 32, DIN 35, and DIN 35-15 rails, enabling compatibility with standardized industrial panel construction methods. DIN rail installation allows fast assembly and easier system expansion.
The terminal block supports conductor sizes from 0.2 sq.mm to 4 sq.mm stranded conductors and up to 6 sq.mm solid conductors, offering flexibility across industrial wiring requirements. Support for ferrules and twin conductor arrangements further increases installation versatility.
Manufactured using industrial-grade polyamide housing, DDFL4U provides strong insulation performance, dimensional stability, and mechanical durability for industrial operating environments. The housing is suitable for applications involving vibration, temperature changes, and long-term electrical loading.
With a rated voltage of 800V and fuse current rating of 6.3A, the terminal block delivers dependable protection and conductor management across industrial electrical systems. The product also provides 5 kV surge voltage resistance and pollution degree 3 protection for industrial applications.
Its 8 mm compact width enables efficient panel utilization while maintaining accessibility for fuse replacement and wiring operations. The integrated design supports cleaner layouts and reduces installation complexity.
DDFL4U is widely used in PLC panels, industrial control systems, switchgear assemblies, instrumentation panels, automation cabinets, machine control systems, OEM equipment, process control installations, and protected electrical distribution circuits where organized fuse protection and compact wiring are required.
| Specification | Details |
|---|---|
| Product Code | DDFL4U |
| Product Type | Double Level Fuse Terminal Block |
| Connection Technology | Screw Clamp |
| Product Function | Fuse + Feed Through |
| Rated Voltage | 800 V |
| Fuse Current Rating | 6.3 A |
| Fuse Type | Cartridge Glass Fuse |
| Fuse Size | 5 × 20 mm |
| Housing Material | Polyamide |
| Housing Color | Grey |
| Wire Entry Orientation | Side Entry |
| Mounting Type | DIN 32 / DIN 35 / DIN 35-15 Rail |
| Screw Size | M3 |
| Tightening Torque | 0.5 Nm |
| Rated Surge Voltage | 5 kV |
| Pollution Degree | 3 |
| Stranded Conductor Range | 0.2–4 sq.mm |
| Solid Conductor Range | 0.2–6 sq.mm |
| AWG Range | 22–10 AWG |
| Stripping Length | 9.5 mm |
| Width | 8 mm |
| Length | 88 mm |
Technical specifications compiled from published technical references.
DDFL4U is suitable for:
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