Mollom 12 Way Circuit Breaker MCB Distribution Protection Box with DIN Rail, IP65 Waterproof,for Indoor and Outdoor

Why I chose the Mollom 12‑way enclosure

I needed a compact, weather-resistant DIN-rail enclosure to tidy up a small outdoor sub-distribution: a handful of miniature breakers, a main disconnect, and a surge protector feeding a shed and a garden circuit. The Mollom 12‑way enclosure ticked the right boxes on paper—IP65, IK08, transparent window, DIN rail preinstalled, neutral and earth bars included, and a sensible footprint (260 × 110 × 200 mm). After installing and wiring it, I’ve formed a clear view of where it works well and where it’s constrained.

Build and weather protection

The housing is PC+ABS, and the molding quality is better than typical “budget” boxes. The body feels rigid without much flex, and the lid’s clear window sits evenly against the gasket. The cover latches are simple spring clips that are easy to operate with one hand, and there’s a small provision to add a seal or mini padlock—handy for deterring casual access.

Weatherproofing is genuinely solid for rain and dust, provided you use appropriate glands and tighten them correctly. The supplied three glands are serviceable and thread well into drilled openings; they compress reliably on common sheath diameters. With glands snugged up and the lid gasket seated properly, I’m comfortable calling this IP65 in real-world use. I wouldn’t mount it where it will be pressure-washed, and I’d avoid direct, unshaded southern exposure if you can help it—PC+ABS is tough, but UV will age any plastic over years. Impact-wise, IK08 is good for incidental knocks; it’s not a heavy-duty metal can, but it doesn’t feel flimsy.

One small note: the front cover screws bite into plastic bosses rather than metal inserts. They hold fine and tighten cleanly, but repeated on/off cycles will wear plastic over time. If you expect to service the internals frequently, keep that in mind and don’t overtighten.

Interior layout and capacity

Inside, the enclosure is organized and straightforward:

• DIN rail: full-width, suitable for up to 12 single-module MCBs (or any mix that adds up to twelve modules).
• Bus bars: neutral and earth bars are included, mounted in a plastic carrier that snaps to the back panel.

The DIN rail alignment was spot on; standard breakers clicked in securely. The neutral and earth bars are a reasonable size for residential and light commercial wiring, though I wish a matching phase terminal block was included. For neat, modular builds, having all three bars in the same carrier is a nice pattern; here you’ll have to add a separate line/phase block if you need one.

Space is the critical dimension. The 110 mm depth is enough for typical MCBs and tidy wiring, but once you add a bulkier main switch or SPD, routing becomes tighter. With 12 modules populated, plan your conductor paths carefully. I had the best results by:

• Favoring top and bottom cable entry to maintain bend radius.
• Using ferrules on stranded conductors for compact terminations.
• Choosing compact-profile devices where possible (e.g., SPDs with side wiring rather than top-entry bulk).

Side and rear entry are theoretically possible—there’s material to drill—but the lip of the lid and the back ribs limit your real estate. You’ll save yourself frustration by keeping entries to the top and bottom whenever you can.

Installation experience

Mounting is uncomplicated. The back body has four mounting points, and the included expansion screws/anchors are fine for masonry. On drywall or timber, I’d switch to better anchors or wood screws with washers; nothing unusual here. The box sits flush and seals cleanly once the cover is on.

There are no knockouts. You will be drilling all entries yourself. That’s not a complaint—no-knockout designs avoid accidental IP compromises—but it does mean a step drill is the right tool for the job. A few tips from my install:

• Mark your entry centers from inside, accounting for device height and bend radius.
• Drill undersize first, test-fit the gland threads, then finish to the correct diameter with a step bit.
• Deburr inside and out; swarf can cling to the gasket and compromise the seal.
• Use the included glands where they fit; if you need different sizes, order matching IP-rated glands rather than forcing mismatches.

Once mounted and drilled, populating the rail is quick. The transparent window makes initial device alignment and later inspection convenient, and you can operate toggles with the window open without removing the whole cover.

Day-to-day use

The clear window is more than cosmetic—it’s genuinely useful to see breaker positions at a glance. The latches are positive and not fiddly. The lid gasket has a consistent compression; I had no trouble getting a uniform seal without needing to torque the screws hard. There’s enough clearance between devices and the window to avoid accidental contact, even with taller toggles.

Labeling is the only ergonomic gap. There’s no dedicated label strip area on the window; I used standard adhesive labels above the toggles, which hold fine but would benefit from a small recessed strip. Not a dealbreaker, just something to know.

Safety and compliance notes

Mollom provides an UL report reference in the documentation, but the enclosure itself lacked the typical UL/CSA/NRTL listing marks I’d expect to see for North American inspected jobs. That doesn’t make it unsafe, but if your installation is subject to permitting or AHJ inspection, confirm acceptance before you commit. IP65 and IK08 are meaningful; just remember those are ingress and impact ratings, not an endorsement of electrical code compliance. If you need NEMA-specific ratings or a listed assembly, choose accordingly.

Current carrying capacity is dictated by your devices and wiring, not the box. Thermally, the enclosure has no vents (as it shouldn’t, for IP65), so avoid oversubscribing with high-duty, heat-heavy devices unless you’ve validated load and ambient conditions.

What I like

• Solid weather seal with a tidy, compact footprint.
• Preinstalled DIN rail and included N/PE bars simplify basic builds.
• Clear window with quick latches and a sealing option for casual tamper resistance.
• Clean molding and finish; feels better than “no-name” plastic boxes at this price tier.
• Straightforward mounting and a predictable interior layout.

What could be better

• No knockouts means more drilling time; fine for pros, a surprise for some DIYers.
• Internal space gets tight once you approach 12 modules with larger accessories (SPDs, 2-pole mains).
• Cover screws thread into plastic; frequent service could wear the bosses.
• Only neutral and earth bars included; a matching line terminal block would make builds cleaner.
• Side and rear entries are possible but awkward; top/bottom entries are the realistic options.

Ideal use cases

• Small outdoor or semi-outdoor sub-distribution where rain/dust protection matters.
• Solar adjuncts: string breaker grouping, small DC or AC combiner (within device ratings).
• Garden, shed, or workshop subpanels with a handful of circuits.
• Guesthouse or EVSE-adjacent equipment where visual status through the window is helpful.

I wouldn’t choose it for heavy industrial environments, frequent service access, or scenarios demanding formal third-party listings with explicit NEMA ratings.

Practical tips for a clean build

• Plan device order to minimize conductor crossing; put the main isolator at one end.
• Keep cable entries aligned with device terminals to preserve bend radius.
• Use ferrules and slimline DIN accessories to maximize the limited depth.
• If you need a phase terminal block, pick a low-profile DIN-mount model and test fit before drilling.
• Avoid overtightening cover screws; snug is sufficient to compress the gasket.

Verdict

The Mollom 12‑way enclosure hits a sweet spot for compact, weather-resistant DIN rail projects that need to look neat, stay dry, and be easy to inspect without opening the box. Its strengths are the IP65 build quality, simple installation, and a thoughtful windowed cover that makes routine checks effortless. Its limitations—tight wiring space at full capacity, DIY drilling for entries, and plastic-threaded cover screws—are manageable with planning.

Recommendation: I recommend the Mollom 12‑way enclosure for light-duty outdoor or indoor sub-distribution, small solar adjuncts, and tidy multi-breaker builds where IP65 is important and budget matters. It’s not a fit for heavy-industrial abuse or jurisdictions requiring a listed enclosure with NEMA markings, but for most small electrical projects, it provides solid value and reliable protection in a compact package.