
The 1551JTBU is a translucent blue ABS plastic miniature hand held enclosure from the 1551 series, with a nominal size of 60 x 35 x 15 mm (2.36 in x 1.38 in x 0.59 in). It is intended for OEM engineers, electronics designers and installers who need a small general purpose box for mounting a compact printed circuit board or for use as a potting box.
The enclosure is molded from general purpose ABS plastic with 2 mm (0.08") walls and carries a UL94 HB flame rating. Colour is translucent blue, and the self-tapping lid screws are colour matched: black plated screws are supplied with this translucent blue version. Lap joint construction between box and lid protects against access of dust and splashing water, and the enclosure is designed to meet IP54.
This is the low-profile 60 x 35 mm size: at 15 mm overall depth it has 11.00 mm of inside height, suited to thin boards up to 54.5 mm by 29.5 mm or to shallow potting. Inside dimensions are 55.17 mm [2.17 in] long, 30.17 mm [1.19 in] wide and 11.00 mm [0.43 in] high. PC board mounting bosses are molded into the interior and accept #2 x 3/16" self-tapping screws (not included; part number 1551ATS100, nickel plated, pack of 100).
The 1551JTBU is supplied as box, lid and 2 cover screws (#4 x 1/2" self-tapping), with a recommended lid screw torque of 35-43 ozf.in (25-30 cN.m). It is RoHS and REACH compliant, packed in a bag, with a shipping weight of 0.05 lbs (0.02 kg). Some chemicals, including acetone, ketones, thread locking compounds and cutting fluids, can damage ABS, so check compatibility before use.
| Type | Miniature, general purpose |
| Series | 1551 Series, ABS Plastic Miniature Hand Held Enclosures |
| Description | translucent blue plastic enclosure |
| Part Number | 1551JTBU |
| Ordering Table | Standard Enclosures |
| Assembly Includes | Box, lid, 2 cover screws |
| Short Description | 60 X 35 X 15MM ABS TRANS. BLUE |
| Width | 1.38 in (35 mm) |
| Length | 2.36 in (60 mm) |
| Inside Width | 30.17 mm [1.19 in] |
| Inside Height | 11.00 mm [0.43 in] |
| Inside Length | 55.17 mm [2.17 in] |
| Wall Thickness | 2 mm (0.08 in) |
| Depth (Including Lid) | 0.59 in (15 mm) |
| Nominal Size (L X W X H) | 2.36 in x 1.38 in x 0.59 in (60 mm x 35 mm x 15 mm) |
| Max. P.C. Board Width (Mm) | 54.5 |
| Max. P.C. Board Length (Mm) | 29.5 |
| Maximum P.C. Board Size (Drawing) | 54.50 mm x 29.50 mm [2.15 in x 1.16 in] |
| PC Board Screws | 1551ATS100 (nickel plated, pack of 100) |
| Replacement Lid Screws | 1591TS100BK (black, pack of 100); alternative finish 1591TS100 (nickel plated, pack of 100) |
| UPC | 623980035178 |
| UNSPSC | 39121301 |
| Drawing Revision | 31.08.2023 |
| Solid Models | .stp or .x_t |
| Factory Modification | Milling, drilling, printing etc. available from the factory on quotation |
| Gray Version | 1551JGY |
| Black Version | 1551JBK |
| Packaging Type | bag |
| Shipping Weight | 0.05 lbs (0.02 kg) |
| Color | Trans. Blue |
| Material | ABS Plastic (general purpose) |
| Lid Screws | 2 x #4 x 1/2" self-tapping, included |
| PC Board Screws | #2 x 3/16" (4.8 mm) self-tapping, not included |
| Lid Construction | Lap joint |
| Lid Screw Finish | Black plated (colour matched to enclosure) |
| PC Board Mounting | Molded bosses accept #2 self-tapping screw |
| Recommended Lid Screw Torque | 35-43 ozf.in / 25-30 cN.m |
| IP Rating | IP54 |
| Flame Rating | UL94 HB |
| Chemical Resistance | Avoid acetone, ketones, ethers, aromatic and chlorinated hydrocarbons, thread locking compounds, cutting or tapping fluid, water detection paste, anti-seize paste, strong solvents or cleaners, and some greases and oils |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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The maximum P.C. board size is 54.50 mm x 29.50 mm [2.15 in x 1.16 in]. The inside of the box is 55.17 mm [2.17 in] long, 30.17 mm [1.19 in] wide and 11.00 mm [0.43 in] high.
This size is also offered as 1551JBK and 1551JGY in the standard enclosure table, with flanged versions in black or grey.
It is designed to meet IP54. The lap joint construction protects against access of dust and splashing water; it is not rated for immersion.
The purchased assembly includes the box, the lid and 2 cover screws (#4 x 1/2" self-tapping, black plated). PC board screws are not included.
The molded bosses accept #2 x 3/16" self-tapping screws, available as part number 1551ATS100 (nickel plated, pack of 100).
General purpose ABS plastic in translucent blue, with 2 mm (0.08") walls and a UL94 HB flame rating. Avoid acetone, ketones, thread locking compounds and strong solvents, which can damage ABS.

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