1sna399777r1200 – d4/8,sft2,i,ado

Why Choose the TE Connectivity D4/8.SFT2.I.ADO Fuse Terminal Block?

The TE Connectivity / ENTRELEC D4/8.SFT2.I.ADO, manufacturer part number 1SNA399777R1200, is a compact fuse DIN rail terminal block with ADO and screw-clamp connections designed for circuit protection, testing and reliable conductor termination in industrial control panels, machinery and automation systems. Part of the established ENTRELEC ADO System terminal block range, it accepts standard 5 × 20 mm and 5 × 25 mm cartridge fuses.

The D4/8.SFT2.I.ADO combines the speed and reliability of ADO insulation displacement connection technology with a conventional screw-clamp connection. This hybrid arrangement gives panel builders flexibility when terminating field and control wiring, while the ADO connection can accommodate up to two conductors per connection. The integrated fuse holder allows individual circuits to be protected without requiring a separate panel-mounted fuse carrier.

With a rated current of 6.3 A, rated voltage of 630 V and rated cross-section of 1.5 mm², the 1SNA399777R1200 is well suited to protected industrial control and instrumentation circuits. Two integrated 2 mm test sockets provide convenient access for electrical measurements during commissioning, diagnostics and maintenance, while its compact 8 mm-wide profile helps conserve DIN rail space.

Key Advantages

• Integrated fuse holder for 5 × 20 mm and 5 × 25 mm fuses.
• Two 2 mm test sockets provide convenient access for measurement and diagnostics.
• 6.3 A rated current for protected control and instrumentation circuits.
• 630 V rated voltage for industrial electrical applications.
• Combines ADO System and screw-clamp connection technologies.
• ADO connection supports up to two wires per connection.
• Compact 8 mm width helps maximise available DIN rail space.
• Fuse protection and conductor termination are combined within a single terminal block.

Key Features

• TE Connectivity / ENTRELEC D4/8.SFT2.I.ADO fuse terminal block.
• Suitable for 5 × 20 mm and 5 × 25 mm cartridge fuses.
• Two integrated 2 mm test sockets.
• 6.3 A rated current.
• 630 V rated voltage.
• 1.5 mm² rated cross-section.
• 180 A short-time withstand current for 1 s.
• Hybrid ADO System and screw-clamp connection.
• ADO conductor capacity of 0.34–1.5 mm².
• Screw-clamp conductor capacity up to 4 mm².
• IP20 protection at the main terminals.
• Grey polyamide insulating housing.
• Compatible with TH 35-7.5 and TH 35-15 DIN rail.
• Fuse terminal profile aligned with compatible D4/8.SN.I.ADO disconnect terminals.

Circuit Protection and Testing for Industrial Control Panels

Fuse terminal blocks combine conductor termination and overcurrent protection within a single DIN rail component, helping panel builders create compact and organised protected circuits. The D4/8.SFT2.I.ADO accepts standard 5 × 20 mm and 5 × 25 mm cartridge fuses, allowing individual circuits to be protected without requiring separate fuse holders elsewhere in the control cabinet.

The two integrated 2 mm test sockets provide convenient access for electrical measurement and diagnostics. Combined ADO and screw-clamp termination gives installers flexibility when connecting field and panel wiring, while the compact 8 mm profile makes the terminal particularly useful in densely populated industrial control cabinets.

Typical Applications

• Fused industrial control circuits.
• PLC input and output circuit protection.
• Industrial automation and control panels.
• Instrumentation and process control circuits.
• Machine building and OEM electrical systems.
• Factory automation and production equipment.
• Low-current auxiliary and signalling circuits.
• Circuits requiring convenient fuse isolation and electrical test access.