Fused Terminal Blocks

A fused terminal block is a DIN rail terminal block that protects the circuit it connects to with a glass fuse inserted in the fuse holder in its housing, and isolates the line when the fuse is removed. It is used in control panels to protect each of the small-current branches, such as sensors, PLC inputs and outputs, pilot lights and measuring circuits, individually. In this category, Onka MRK-S series 6 mm² screw-connection and OPK-S series 2.5 mm² spring-connection fused terminal blocks are listed with 6.3 A rated current, in housing colors such as beige, gray, blue, red, yellow and black. Choose the connection type (screw or spring) to match the other terminal blocks in the panel, the housing (2.5 mm² or 6 mm²) by conductor cross-section, the glass fuse's rated current by the circuit to be protected and the housing color by circuit grouping. The manufacturer describes these models as without glass fuse; the rated current of the separately supplied fuse must not exceed the terminal block's 6.3 A. A fused terminal block does not replace the miniature circuit breaker used for line protection; when the glass fuse blows, it is replaced with a new one.

Products

How to choose Fused Terminal Blocks

A fused terminal block is a DIN rail terminal block that protects the circuit it connects to with a glass fuse inserted in the fuse holder in its housing, and isolates the line when the fuse is removed. It is used in control panels to protect each of the small-current branches, such as sensors, PLC inputs and outputs, pilot lights and measuring circuits, individually.

  • Clarify whether the task is connection, cable routing, enclosure distribution or termination.
  • Match dimensions, thread standard, conductor cross-section and IP rating with the cable and panel.
  • Choose housing material and pack quantity according to the mounting environment.

Frequently asked questions

What is Fused Terminal Blocks and where is it used?

A fused terminal block is a DIN rail terminal block that protects the circuit it connects to with a glass fuse inserted in the fuse holder in its housing, and isolates the line when the fuse is removed. It is used in control panels to protect each of the small-current branches, such as sensors, PLC inputs and outputs, pilot lights and measuring circuits, individually.

What should I compare when choosing Fused Terminal Blocks?

Choose the connection type (screw or spring) to match the other terminal blocks in the panel, the housing (2.5 mm² or 6 mm²) by conductor cross-section, the glass fuse's rated current by the circuit to be protected and the housing color by circuit grouping.

Where can I find technical details for Fused Terminal Blocks products?

The manufacturer describes these models as without glass fuse; the rated current of the separately supplied fuse must not exceed the terminal block's 6.3 A.

Fused Terminal Blocks Selection Guide: Technical Criteria & Application Standards