The 1550N is a natural-finish diecast aluminum enclosure from the 1550 Series, with a square 250 x 250 mm footprint with a 97 mm body height. The part page lists its size as 9.85 in x 9.85 in x 3.82 in (250 mm x 250 mm x 97 mm). It suits electronics designers, OEM engineers and hobby builders who need a rugged, easy-to-machine metal box for instruments, control circuits or stomp-box style projects.
The drawing shows a square inside cavity of 240.30 x 240.30 mm [9.46 x 9.46 in] with 96.30 mm [3.79 in] of height, room for a large board together with its connectors and wiring. The series ordering table lists this size as 9.84 in (250 mm) long, 9.84 in (250 mm) wide and 3.98 in (101 mm) high, a figure that includes the 4 mm (0.16 in) lid; the drawing shows 101.30 mm [3.99 in] overall with the lid fitted. Shipping weight is 3.43 lbs (1.56 kg).
Die-cast aluminum alloy is tough yet easy to machine, and the unpainted body is vibra finished for a smooth surface with no sharp edges. Lap joint construction protects against dust and splashing water. Four M3.5 x 0.6 x 12 mm stainless steel Philips head machine screws hold the lid in factory tapped holes. Smooth, rib-free internal walls make fitting connectors straightforward, and a low side wall draft angle (2° less) helps with PC board mounting.
As supplied, without a gasket, the 1550N is rated IP54. Adding the 1550NEGASKET EVA foam gasket kit brings it to IP66, and the 1550NSGASKET silicone kit is the IP67 upgrade (with properly installed gasket and lid screws torqued at 55 cN.m). The same size in black powder coat is the 1550NBK, and the version shipped with an IP66 gasket is the 1550WN. It is RoHS and REACH compliant and ships in shrink wrap.
| Type | Die-cast box |
| Series | 1550 Series Diecast Aluminum Enclosures (Standard & Water-Tight Options) |
| Description | diecast aluminum enclosure |
| Part Number | 1550N |
| Gasket Included | No (without gasket version) |
| Black Equivalent | 1550NBK |
| Short Description | DIECAST BOX 1550 SERIES |
| Equivalent With IP66 Gasket Included | 1550WN |
| Lid Height | 4 mm (0.16 in) — add to enclosure depth for lid |
| Inside Height | 96.30 mm [3.79 in] |
| Inside Box Width | 240.30 mm [9.46 in] |
| Size (L X W X H) | 9.85 in x 9.85 in x 3.82 in (250 mm x 250 mm x 97 mm) |
| Inside Box Length | 240.30 mm [9.46 in] |
| Overall Width (Drawing) | 250.10 mm [9.85 in] |
| Overall Length (Drawing) | 250.20 mm [9.85 in] |
| Box Height Without Lid (Drawing) | 97.00 mm [3.82 in] |
| Overall Height With Lid (Drawing) | 101.30 mm [3.99 in] |
| Nominal Size Width (Ordering Table, Includes Lid) | 9.84 in (250 mm) |
| Nominal Size Height (Ordering Table, Includes Lid) | 3.98 in (101 mm) |
| Nominal Size Length (Ordering Table, Includes Lid) | 9.84 in (250 mm) |
| IP66 Gasket Kit (EVA Foam, Pair) | 1550NEGASKET |
| IP67 Gasket Kit (Silicone, Pair) | 1550NSGASKET |
| Driver Bit For Tamper-Proof Screws | SCDRIVET15-2 |
| Replacement Screws (Package Of 100) | 1550MS100 |
| Tamper-Resistant Torx With Pin Screws (Package Of 50) | 1550MS50T |
| UPC | 623980057682 |
| UNSPSC | 39121301 |
| Packaging Type | shrink wrap |
| Shipping Weight | 3.43 lbs (1.56 kg) |
| Color | Natural Aluminum |
| Finish | Natural vibra finish (unpainted, smooth surface with no sharp edges) |
| Material | Aluminum (Die-Cast Alloy) |
| CAD Models | Solid models available in .stp or .x_t |
| Lid Screws | M3.5 x 0.6 x 12 mm long stainless steel, Philips head machine screws |
| Joint Construction | Lap joint (protection against dust and splashing water) |
| Lid Holes (Drawing) | 4X Ø4.07 mm [0.16 in] |
| Factory Modification | Milling, drilling, printing etc. available from the factory |
| Side Wall Draft Angle | Low (2° less) for easy PC board mounting |
| Lid Screw Holes In Box | 4X M3.5-0.6, factory tapped |
| IP Rating | IP54 |
| IP67 Upgrade | Available with silicone gasket kit |
| IP Rating With Gasket | IP66 (lid screws torqued at 55 cN.m) |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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The drawing gives an inside box length of 240.30 mm [9.46 in], inside width of 240.30 mm [9.46 in] and inside height of 96.30 mm [3.79 in]. The outside size is 9.85 in x 9.85 in x 3.82 in (250 mm x 250 mm x 97 mm).
Without a gasket it is rated IP54, with lap joint construction protecting against dust and splashing water. Fitting the 1550NEGASKET EVA foam gasket kit brings it to IP66, and the 1550NSGASKET silicone kit is tested to IP67, both with lid screws torqued at 55 cN.m.
No. The 1550N is the version without a gasket. The 1550WN is the equivalent supplied with an IP66 gasket, or you can add the 1550NEGASKET (IP66) or 1550NSGASKET (IP67) kit, each containing two pre-formed gaskets.
The part page lists a body height of 97 mm, while the series ordering table gives 3.98 in (101 mm) because its dimensions include the 4 mm (0.16 in) lid.
M3.5 x 0.6 x 12 mm long stainless steel Philips head machine screws thread into factory tapped holes. Replacement screws are 1550MS100 (package of 100); tamper-resistant Torx with pin screws are 1550MS50T (package of 50), driven with the SCDRIVET15-2 bit.
Yes. Diecast aluminum is tough yet easy to machine, and there are no internal ribs to interfere with connectors. The factory also offers milling, drilling and printing modifications.
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