| Part Number: | ULO | - | TB344 | - | UDK 4 BU |
|---|---|---|---|---|---|
| Explanation: |
Brand |
Product Code |
Terminal and Color UDK 4 BU - Blue UDK4; 4mm² nominal cross-section; retain both spaces |
UDK4 provides four screw connections on a single level, with one common electrical potential. The 6.15mm-wide terminal mounts on NS35/7.5 rail and accepts a dedicated end cover and fixed bridge.
| Model | Color | Positions | Connections | Levels | Potentials |
|---|---|---|---|---|---|
| ULO-TB344-UDK4 | Gray | 1 | 4 | 1 | 1 |
| ULO-TB344-UDK 4 BU | Blue |
| Parameter | Value |
|---|---|
| IEC nominal / maximum load current | 32A / 32A |
| IEC nominal voltage | 630V |
| Rated impulse voltage | 8kV |
| Overvoltage category / pollution degree | III / 3 |
| Nominal conductor cross section | 4mm² |
| Solid conductor | 0.2–6mm²; 24–10AWG |
| Flexible conductor | 0.2–4mm²; 24–12AWG |
| Flexible conductor with ferrule | 0.25–1.5mm² |
| Screw size / tightening torque | M3 / 0.5N·m |
| Stripping length | 8mm |
| UL use group | Rated current | Rated voltage | Conductor range |
|---|---|---|---|
| B | 30A | 300V | 30–10AWG |
| C | |||
| D | 5A | 600V |
The UL conductor range applies to the listed UL use-group ratings. General solid and flexible conductor ranges are specified separately.
| Parameter | Value |
|---|---|
| Width × length × height | 6.15mm × 63.6mm × 45.9mm |
| Rail-seat-to-top height | 39.6mm |
| Rail center to right end | 31.8mm |
| Half-rail width | 17.5mm |
| Mounting rail | NS35/7.5 |
| Protection level | IP20 |
| Operating temperature | -40°C to +105°C |
| Insulation material / group | PA66 / I |
| Flammability classification | UL94V-0 |
| Contact material / finish | Copper alloy / tin plated |
| Accessory | Reference |
|---|---|
| End cover | ULO-TB392-D-UDK4 |
| Partition plate | ULO-TB395-TS-KK3 |
| Fixed bridge | ULO-TB390-FBI XX-6 |
| Marker strip | ULO-TB391-ZB6; ULO-TB391-ZBF6 |
| Marker card | ULO-TB394-B1; ULO-TB394-B2; ULO-TB394-B3 |
| End clamp | ULO-TB393-E/UK; ULO-TB393-E/UK1; ULO-TB393-E-WA |
| Dimension range | Total pitch tolerance | Nominal dimension tolerance |
|---|---|---|
| 0–30mm | ±0.18mm | ±0.20mm |
| Over 30–53mm | ±0.20mm | ±0.25mm |
| Over 53–70mm | ±0.25mm | ±0.30mm |
| Over 70–90mm | ±0.30mm | ±0.35mm |
| Over 90–115mm | ±0.35mm | ±0.44mm |
| Over 115–150mm | ±0.44mm | ±0.55mm |
| Over 150–200mm | ±0.55mm | ±0.70mm |
| Over 200–250mm | ±0.70mm | ±0.80mm |
| Over 250–320mm | ±0.75mm | ±0.90mm |
Geometric tolerances: perpendicularity 0.2mm through 10mm and 0.3mm above 10mm; symmetry 0.3mm; straightness 0.2mm through 100mm; parallelism 0.3mm over 100–150mm and 0.5mm above 150mm.
