MRK Series Screw Connection Rail Fused Terminal Blocks
Onka offer great value fully encapsulated DIN rail terminals. The MRK Series includes these 4mm2 fused terminal block which clip direct to standard 35mm DIN rail. They provide basic overcurrent and short circuit protection. The MRK-S features a 5 stage mechanism to avoid accidental opening and closure.
- Cables up to 4.0mm2 can be terminated at the fuseholder
- Accepts standard 5 x 20mm fuse, fast lever operation (fuse not included)
- Typically used in control panels for distribution of DC power supply
- No need to purchase additional end plates - terminal has an embedded end plate
- Terminals are symmetrical - does not matter which way around they are mounted
- Screw connection - accepts solid conductors or crimped ferrules
- Only 8mm wide - saves space on the DIN rail
Suitable for:
- 35 x 7.5mm DIN Rail (Top Hat Rail)
- 35 x 15mm DIN Rail (Top Hat Rail)
- New for 2026 - matches Onka colour code range 1010587-1010596
Technical Data
| Body | PA6.6 |
| Bridge | Phosphor bronze |
| Contact | CK45 Steel |
| Screw | Steel |
| Temperature | -40°C, +140°C |
| Cable Strip L. | 10mm |
| Torque | 0.5Nm |
| Voltage | 750V |
| Current | 6.3A |
| Section | 4mm² |
| Pollution Degree / Overvoltage Category | 2 / III |
| Norm | EN-60947-7-3 |
Dimensions
| Width | 8 mm |
| Length | 53 mm |
| Height on 35 x 7.5 rail | 45 mm |
| Height on 35 x 15 rail | 52.5 mm |
Frequently Asked Questions
Is a fuse included?
No - the terminal is supplied without a fuse. It takes a standard 5x20mm glass fuse, see our 5x20mm glass fuse range.
What is the difference between this and the 6mm² version?
This 4mm² version is a narrower 8mm terminal for smaller cables. For cables up to 6mm² see the Onka MRK-S 6mm² fused terminal.
Do I need end plates?
No - an end plate is built in. Use an MRK/OPK end stop (e.g. Onka 1060002) to hold the terminal row in place.