The RP1120BF is a water-tight polycarbonate enclosure with an integral bottom flange and a opaque lid, sized 125 x 85 x 40 mm (4.92 in x 3.35 in x 1.57 in). It is aimed at OEM engineers, electronics builders and electricians who need a gasketed housing for printed circuit boards or components that bolts flat to a panel, wall or chassis through its flange. The opaque lid hides the contents and offers a smooth recessed area on top for a membrane, label or silkscreen.
The body is polycarbonate with a flame rating of UL94 V-2, compared with the UL94-HB general-purpose ABS versions in the same series. The part page lists the colour as Light Gray; the series ordering table lists this part under Off White Polycarbonate. A two-piece tongue-and-groove lid with a rubber gasket (included, field installed) guards against oil, dust and water, and the design is rated IP65. Self-captivating M3.5 stainless steel lid screws (included) thread into corrosion-resistant bushings for repeated assembly and disassembly.
The drawing gives inside dimensions of 119.23 mm [4.69 in] long, 79.23 mm [3.12 in] wide and 34.50 mm [1.36 in] high, and 155.95 mm [6.14 in] overall length across the flange, which carries 5.20 mm [0.20 in] mounting holes. The part page lists a maximum PC board size of 117 x 77 mm, and the internal board posts accept M3 self-tapping screws. This size is a 125 x 85 mm footprint that the series ordering table offers in four heights: 40, 55, 70 and 85 mm.
Matching accessories listed for the RP1120BF include plastic inner panel STC113, aluminum inner panel STA113 and replacement gasket two-pack RP113GASKET. Spare lid screws (SC619-50) and PC board screws (SC622-50) come in 50-packs. It is RoHS and REACH compliant, packed in a bag at a shipping weight of 0.37 lbs (0.17 kg).
| Mounting Style | Integral bottom flange |
| PC Board Mounting | PC board mounting posts; accept M3 self-tapping screws |
| Internal Mounting Options | Internal DIN rail mounting tabs and PC board mounting posts; options vary with size (refer to drawing) |
| Flange Mounting Hole Diameter | 5.20 mm [0.20 in] |
| Type | General purpose, water-tight |
| Series | RP Series With Bottom Flange (Water-Tight ABS & Polycarbonate Enclosures) |
| Description | POLYCARB WATERTIGHT |
| Part Number | RP1120BF |
| Drawing Reference | RP112 BF (REV: 20.11.2025) |
| Short Description | POLYCARB WATERTIGHT |
| Series Table Variant | Off White Polycarbonate · Opaque Lid w/ Bottom Flange |
| Inside Width | 79.23 mm [3.12 in] |
| Inside Height | 34.50 mm [1.36 in] |
| Inside Length | 119.23 mm [4.69 in] |
| Lid Inlay Depth | 0.40 mm [0.02 in] |
| Size (L X W X H) | 4.92 in x 3.35 in x 1.57 in (125 mm x 85 mm x 40 mm) |
| Max. PC Board Width | 77 mm |
| Max. PC Board Length | 117 mm |
| Width (Series Table) | 3.35 in (85 mm) |
| Height (Series Table) | 1.57 in (40 mm) |
| Length (Series Table) | 4.92 in (125 mm) |
| Overall Length Across Flange (Drawing) | 155.95 mm [6.14 in] |
| Extra Lid Screws | SC619-50 (50-pack, self-tapping M3.5-0.6 x 10 mm) |
| Extra PC Board Screws | SC622-50 (50-pack, self-tapping M3 x 6 mm) |
| Replacement Gasket (2-Pk) | RP113GASKET |
| Optional Inner Panel (Plastic) | STC113 |
| Optional Inner Panel (Aluminum) | STA113 |
| UPC | 623980318554 |
| UNSPSC | 39121301 |
| Light Gray ABS Plastic / Clear Lid | RP1125BFC |
| Light Gray ABS Plastic / Opaque Lid | RP1125BF |
| Off-White Polycarbonate / Clear Lid | RP1120BFC |
| Packaging Type | Bag |
| Shipping Weight | 0.37 lbs (0.17 kg) |
| Lid | Opaque, with smooth recessed area for membrane, label or silkscreen |
| Color | Light Gray |
| Gasket | Rubber gasket included; must be field installed |
| Material | Polycarbonate |
| CAD Models | Solid models available in .stp or .x_t |
| Lid Screws | Self-captivating M3.5 stainless steel machine screws (included); lid holes are threaded with first installation |
| Lid Construction | Two-piece tongue & groove, gasketed |
| Included Hardware | Lid screws, PC board screws and gasket |
| Lid Screw Inserts | Corrosion-resistant bushings, for repetitive assembly & disassembly |
| Factory Modification | Can be factory modified (milling, drilling, printing etc.) |
| IP Rating | IP65 (designed to meet IP65) |
| Protection | Gasketed lid protects against access of oil, dust and water |
| Flame Rating | UL94 V-2 |
| Chemical Resistance | Some chemicals can damage or weaken plastic; avoid acetone, ketones, ethers, aromatic and chlorinated hydrocarbons, thread-locking compounds, cutting/tapping fluid, water detection and anti-seize paste, strong solvents or cleaners, and some greases and oils |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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The listed size is 4.92 in x 3.35 in x 1.57 in (125 mm x 85 mm x 40 mm). The drawing shows inside dimensions of 119.23 mm [4.69 in] x 79.23 mm [3.12 in] x 34.50 mm [1.36 in] and an overall length of 155.95 mm [6.14 in] across the bottom flange.
It is designed to meet IP65. The two-piece tongue-and-groove lid uses a rubber gasket, supplied with the enclosure and field installed, to protect against oil, dust and water.
The part page lists a maximum PC board length of 117 mm and width of 77 mm. The internal board posts accept M3 self-tapping screws; extra screws are available as SC622-50 (50-pack, M3 x 6 mm).
It has an integral bottom flange; on the drawing the flange mounting holes are 5.20 mm [0.20 in] in diameter. For a version without flanges, the manufacturer points to the RP Series.
The part page lists the colour as Light Gray, while the series ordering table groups it under off-white polycarbonate. Polycarbonate carries a UL94-V2 flame rating versus UL94-HB for the ABS versions.
The series table lists plastic inner panel STC113, aluminum inner panel STA113 and replacement gasket two-pack RP113GASKET, plus SC619-50 spare lid screws.
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