| Part Number: | ULO | - | TB44 | - | 28 | C | / | A | - | 02 | P | - | 3 | 1 | 0 | 0A |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Explanation: |
Brand |
Series Code |
Model Family 28 - 7.62mm single-row barrier terminal block |
Tail Configuration C - Centered straight pins |
Mounting Ends A - Mounting ears |
Positions 02-24 - Two to twenty-four positions, written as two digits |
Position Unit P - Position-count suffix |
Color 1 - Grey |
Screw Head 1 - Cross-head screw used in the illustrated ordering suffix |
Clamping 0 - Screw-down clamping used in the illustrated ordering suffix |
Product Version 0A - Standard product |
The 28 series combines a single row of screw connections with 7.62mm pitch and 2-24 positions. Select C for centered straight pins, S for offset straight pins, H for extended eyelet lugs, or R for bent tails. The /A versions have mounting ears; /B versions have compact ends without ears. Covers are shown with each configuration.
| Model | Tail configuration | Ends | Body height | Height with cover |
|---|---|---|---|---|
| ULO-TB44-28C/A | Centered straight pins | Mounting ears | 15.30mm | 17.30mm |
| ULO-TB44-28C/B | No ears | |||
| ULO-TB44-28S/A | Offset straight pins | Mounting ears | ||
| ULO-TB44-28S/B | No ears | |||
| ULO-TB44-28H/A | Extended eyelet lugs | Mounting ears | ||
| ULO-TB44-28H/B | No ears | |||
| ULO-TB44-28R/A | Bent tails | Mounting ears | 15.29mm | 17.29mm |
| ULO-TB44-28R/B | No ears |
Apply the ratings for the relevant standard and use group. The IEC values below apply at pollution degree 2 and overvoltage category III.
| Rating system or use group | Rated current | Rated voltage | Rated impulse voltage |
|---|---|---|---|
| IEC, III/2 | 24A | 300V | 5kV |
| UL use group B | 15A | Not specified | |
| UL use group C | 150V | ||
| UL use group D | 10A | 300V |
| Connection or operating parameter | Value |
|---|---|
| Positions / rows / pitch | 2-24 / 1 / 7.62mm |
| Connection method | Screw connection |
| Wire range | 22-14AWG |
| Clamping screw / tightening torque | M3 / 0.5N·m |
| Stripping length | 7mm |
| Protection level | IP20 |
| Operating temperature | -40°C to 105°C |
| Component | Material and finish |
|---|---|
| Housing | PA66, insulation material group I, UL94V-0 |
| Cover | PC, UL94V-2 |
| Contacts and tails | Tin-plated copper alloy |
| Screws | Nickel-plated steel |
N is the number of positions, from 2 to 24. Dimensions below are in millimetres. Body depth is 12mm and cover depth is 14mm. The 7.20mm lower body dimension and 4.70mm end-to-first-pin dimension are identified in the drawings. Body and cover lengths are separate dimensions.
| Dimension | Value | Applicable versions |
|---|---|---|
| Overall body length | 7.62×(N+2) | /A |
| Mounting-hole center distance | 7.62×(N+1) | |
| Mounting-hole diameters | Ø3.20 and Ø5.40 as drawn | |
| Overall body length | 7.62×N+3.05 | /B |
| Cover length | 7.62×N+2.7 | C and S cover drawings |
| First-to-last tail span | 7.62×(N-1) | All |
| Tail style | Tail dimensions | Position or clearance | PCB slot |
|---|---|---|---|
| C | 1×0.8; length 4±0.3 | Pin row 6 from the body edge | 1.56×1.36 |
| S | Pin row 2.75 from the near body edge; 3.25 offset from the mounting-hole centerline on /A | ||
| H | 3×0.8; length 8±0.3 | Lug row 6 from the body edge | 3.56×1.36 |
| R | Shoulder width 3; tip width 1.5; thickness 0.8; extension 4±0.3 | 3.70 inside clearance beneath the body | 2.06×1.36 |
Use specific tolerances printed beside a dimension where provided. The general dimensional bands are listed below in millimetres.
| Dimension range | Total pitch tolerance | Nominal dimension tolerance |
|---|---|---|
| 0-30 | ±0.18 | ±0.20 |
| Over 30-53 | ±0.20 | ±0.25 |
| Over 53-70 | ±0.25 | ±0.30 |
| Over 70-90 | ±0.30 | ±0.35 |
| Over 90-115 | ±0.35 | ±0.44 |
| Over 115-150 | ±0.44 | ±0.55 |
| Over 150-200 | ±0.55 | ±0.70 |
| Over 200-250 | ±0.70 | ±0.80 |
| Over 250-320 | ±0.75 | ±0.90 |
| Geometric tolerance | Range or condition | Tolerance |
|---|---|---|
| Perpendicularity | Up to 10mm / over 10mm | 0.2mm / 0.3mm |
| Symmetry | All | 0.3mm |
| Straightness | Up to 100mm | 0.2mm |
| Parallelism | 100-150mm / over 150mm | 0.3mm / 0.5mm |
Specify the complete model, position count, color and screw configuration. An order follows the form ULO-TB44-28C/A-XXP-Y100A, replacing 28C/A with the selected version, XX with 02-24 and Y with the color code. In the illustrated suffix, 1 denotes a cross-head screw, 0 denotes screw-down clamping and 0A denotes the standard product.
| Color code | Color |
|---|---|
| 1 | Grey |
| 2 | Blue |
| 3 | Black |
| 4 | Green |
| 5 | Orange |
| 6 | Red |
| 7 | Transparent |
| 8 | Yellow |
| 9 | White |
