Double Level Modular DC Fuse Holder Terminal Blocks
Cabinet footprints shrink while field I/O counts multiply, leaving standard 35mm DIN rails starved for space. Traditional single-tier fuse carriers consume excessive rail width, forcing difficult trade-offs between physical clearance and overcurrent protection. Implementing dual-tier Fuse Terminal Blocks resolves this bottleneck, isolating power feeds while routing signal returns within a unified footprint.
Mitigating Direct-Current Arcs and Thermal Load
Direct current lacks the natural zero-crossing points of alternating current, creating sustained electrical arcs during fault clearing.
Fault Isolation Architecture
Systematic segregation between levels streamlines cabinet diagnostics:
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Upper tier: Removable carrier housing a 5x20mm fuse with blown-fuse LED indication.
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Lower tier: Direct feed-through path routing continuous neutral or ground circuits.
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Clamping interface: Tool-free spring tension ensuring gas-tight wire connections under mechanical vibration.
Selecting a rated dc fuse terminal block provides necessary dielectric strength and creepage distances, preventing flashover even during sudden short-circuit surges.
High-Density Distribution
Utilizing a double level fuse terminal block cuts rail space consumption across PLC interface racks by fifty percent. Incorporating an insulated fuse holder terminal ensures balanced thermal dissipation between adjacent modules during continuous operation.
Electrical and Mechanical Ratings
| Characteristic | Specification |
|---|---|
| Nominal Voltage | 24V - 250V AC/DC |
| Maximum Continuous Current | 6.3 A |
| Conductor Cross Section | 0.2 - 2.5 mm² (24 - 14 AWG) |
| Flammability Rating | UL 94 V-0 (Polyamide PA66) |
| Mounting Standard | IEC NS 35/7.5 / NS 35/15 |
Field Integration and Layout Sizing
Potential distribution bridges link neighboring positions without wire jumpers. Retrieve mechanical drawings and full product documentation for this fuse modular terminal block to finalize enclosure layouts with certified circuit isolation.
| Wiring Diagram |  |
| type | ST2-2.5/2X2RD |
| Thickness/Witdh/Height | 5.2*85.6*35.5 mm |
| Nominal cross section | 2.5 mm² |
| Rated current | 10A |
| Rated voltage | 400 V |
| Flame retardant rating UL-94 | V0 |
| The minimum cross section(Rigid wire) | 0.2 mm² |
| The maximum cross section(Rigid wire) | 4 mm² |
| The minimum cross section(Soft wire) | 0.2 mm² |
| The maximum cross section(Soft wire) | 2.5 mm² |
| Cover | ST2-2.5/2X2RDG |
| Jumper | UFB 10-5 |
| Marker | ZB5M |
| Packing unit | 54 |
| Minimum Order Quantity | 54 |
| Weight of each(not include packing box) | 12.5 g |
| Dimensions |  |
