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Grey - DDFL4U - Terminal Block
DDFL4U
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mmDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
DIN Rail Terminal Blocks
Versatile, reliable connections for control and power distribution
Altech offers a complete range of DIN-rail terminal blocks designed for control panels, automation, and machinery wiring. Available in screw-clamp, spring-clamp, and push-in technologies, they provide secure, vibration-resistant connections that save time and space. Options include feed-through, ground, fuse, disconnect, and component carrier blocks, plus stud/ring styles for heavy-duty, high-current applications.
Slim, modular designs maximize panel density—handling up to 600 V while keeping footprints as narrow as 3.5 mm. Accessories like jumpers, separators, test plugs, and labeling systems make installation and maintenance faster, safer, and more organized.
With their flexibility, durability, and broad selection, Altech DIN-rail blocks deliver dependable performance across industries from factory automation to power distribution.
Filters
Selection Guide
Termination - Screw
Termination
Voltage UL
Voltage UL
Current UL - Bottom Level: 35A
Current UL
Type
Type
No. Connections
No. Connections
Selection Guide
Termination - Screw
Termination
Voltage UL
Voltage UL
Current UL - Bottom Level: 35A
Current UL
Type
Type
No. Connections
No. Connections
Grey - DDFL4U(E)/24 - Terminal Block
DDFL4U(E)/24
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 24V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Grey - DDFL4U(E)/48 - Terminal Block
DDFL4U(E)/48
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 48V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Grey - DDFL4U(E)/110 - Terminal Block
DDFL4U(E)/110
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 110V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Grey - DDFL4U(E)/220 - Terminal Block
DDFL4U(E)/220
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 220V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Grey - DDFL4U(E)/440 - Terminal Block
DDFL4U(E)/440
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 440V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Beige - DDFL4U/BG - Terminal Block
DDFL4U/BG
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mmDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Red - DDFL4U/R - Terminal Block
DDFL4U/R
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mmDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Blue - DDFL4U/BU - Terminal Block
DDFL4U/BU
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mmDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Black - DDFL4U/BL - Terminal Block
DDFL4U/BL
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mmDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Orange - DDFL4U/O - Terminal Block
DDFL4U/O
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mmDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Green - DDFL4U/G - Terminal Block
DDFL4U/G
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mmDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Yellow - DDFL4U/Y - Terminal Block
DDFL4U/Y
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mmDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
White - DDFL4U/W - Terminal Block
DDFL4U/W
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mmDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Beige - DDFL4U(E)/24/BG - Terminal Block
DDFL4U(E)/24/BG
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 24V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Red - DDFL4U(E)/24/R - Terminal Block
DDFL4U(E)/24/R
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 24V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Blue - DDFL4U(E)/24/BU - Terminal Block
DDFL4U(E)/24/BU
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 24V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Black - DDFL4U(E)/24/BL - Terminal Block
DDFL4U(E)/24/BL
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 24V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Orange - DDFL4U(E)/24/O - Terminal Block
DDFL4U(E)/24/O
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 24V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Green - DDFL4U(E)/24/G - Terminal Block
DDFL4U(E)/24/G
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 24V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Yellow - DDFL4U(E)/24/Y - Terminal Block
DDFL4U(E)/24/Y
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 24V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
White - DDFL4U(E)/24/W - Terminal Block
DDFL4U(E)/24/W
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 24V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Beige - DDFL4U(E)/48/BG - Terminal Block
DDFL4U(E)/48/BG
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 48V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Red - DDFL4U(E)/48/R - Terminal Block
DDFL4U(E)/48/R
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 48V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Blue - DDFL4U(E)/48/BU - Terminal Block
DDFL4U(E)/48/BU
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 48V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Black - DDFL4U(E)/48/BL - Terminal Block
DDFL4U(E)/48/BL
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 48V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Orange - DDFL4U(E)/48/O - Terminal Block
DDFL4U(E)/48/O
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 48V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Green - DDFL4U(E)/48/G - Terminal Block
DDFL4U(E)/48/G
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 48V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Yellow - DDFL4U(E)/48/Y - Terminal Block
DDFL4U(E)/48/Y
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 48V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
White - DDFL4U(E)/48/W - Terminal Block
DDFL4U(E)/48/W
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 48V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Beige - DDFL4U(E)/110/BG - Terminal Block
DDFL4U(E)/110/BG
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 110V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Red - DDFL4U(E)/110/R - Terminal Block
DDFL4U(E)/110/R
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 110V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Blue - DDFL4U(E)/110/BU - Terminal Block
DDFL4U(E)/110/BU
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 110V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Black - DDFL4U(E)/110/BL - Terminal Block
DDFL4U(E)/110/BL
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 110V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Orange - DDFL4U(E)/110/O - Terminal Block
DDFL4U(E)/110/O
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 110V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Green - DDFL4U(E)/110/G - Terminal Block
DDFL4U(E)/110/G
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 110V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Yellow - DDFL4U(E)/110/Y - Terminal Block
DDFL4U(E)/110/Y
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 110V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
White - DDFL4U(E)/110/W - Terminal Block
DDFL4U(E)/110/W
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 110V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Beige - DDFL4U(E)/220/BG - Terminal Block
DDFL4U(E)/220/BG
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 220V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Red - DDFL4U(E)/220/R - Terminal Block
DDFL4U(E)/220/R
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 220V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Blue - DDFL4U(E)/220/BU - Terminal Block
DDFL4U(E)/220/BU
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 220V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Black - DDFL4U(E)/220/BL - Terminal Block
DDFL4U(E)/220/BL
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 220V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Orange - DDFL4U(E)/220/O - Terminal Block
DDFL4U(E)/220/O
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 220V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Green - DDFL4U(E)/220/G - Terminal Block
DDFL4U(E)/220/G
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 220V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Yellow - DDFL4U(E)/220/Y - Terminal Block
DDFL4U(E)/220/Y
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 220V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
White - DDFL4U(E)/220/W - Terminal Block
DDFL4U(E)/220/W
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 220V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Beige - DDFL4U(E)/440/BG - Terminal Block
DDFL4U(E)/440/BG
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 440V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Red - DDFL4U(E)/440/R - Terminal Block
DDFL4U(E)/440/R
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 440V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Blue - DDFL4U(E)/440/BU - Terminal Block
DDFL4U(E)/440/BU
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 440V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Black - DDFL4U(E)/440/BL - Terminal Block
DDFL4U(E)/440/BL
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 440V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Orange - DDFL4U(E)/440/O - Terminal Block
DDFL4U(E)/440/O
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 440V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Green - DDFL4U(E)/440/G - Terminal Block
DDFL4U(E)/440/G
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 440V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Yellow - DDFL4U(E)/440/Y - Terminal Block
DDFL4U(E)/440/Y
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 440V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
White - DDFL4U(E)/440/W - Terminal Block
DDFL4U(E)/440/W
Double Level Terminal Blocks, Fuse Blocks 5 x 20 and 5 x 25 mm LED Voltage 440V AC/DCDATA SHEET3D STEP File - TBD< Product photo color will vary depending on part number selection.
Selection Guide
Termination - Screw
Termination
Voltage UL
Voltage UL
Current UL - Bottom Level: 35A
Current UL
Type
Type
No. Connections
No. Connections