Micro Connectors RAS-PCS46 Review: Stackable Acrylic Pi Case with Fan

Spec sheets don't tell you whether a Raspberry Pi case is going to crack the first time you tighten a standoff, or whether the included fan sounds like a tiny angry hoover at 3am. I've been building Pi projects for years now, and the number of cases I've pulled apart, reassembled, cursed at, and eventually binned is genuinely embarrassing. So when the Micro Connectors RAS-PCS46 landed on my desk, I wasn't going in with rose-tinted glasses. Two weeks of actual use, a couple of different Pi boards, and a home server project later, here's what I actually found.

The acrylic stackable case market is surprisingly crowded for what is, let's be honest, a pretty niche product category. You've got everything from flimsy single-layer shells that offer about as much protection as a Post-it note, all the way up to proper aluminium enclosures that cost more than the Pi itself. The Micro Connectors four-layer design sits somewhere in the middle of that spectrum, and the question worth answering is whether it's the sweet spot or just a compromise that satisfies nobody. Spoiler: it's more interesting than that.

What caught my attention here is the four-layer stackable design with an included fan and heatsinks. That's a meaningful bundle at this price point. Most budget acrylic cases ship you a couple of perspex sheets and some standoffs, leaving you to sort out thermals yourself. The RAS-PCS46 at least attempts to be a complete solution out of the box, and that's worth examining properly.

Included in the box alongside the case panels are a small 30mm brushless cooling fan (5V, powered directly from the Pi's GPIO pins), a set of three aluminium heatsinks sized for the main SoC, the USB/Ethernet controller chip, and the RAM, plus the necessary M2.5 brass standoffs, screws, and a GPIO header extension. The fan spec is modest but functional, and the heatsinks are the standard adhesive-backed aluminium type you'll find bundled with most Pi accessories. Nothing exotic here, but the fact that it's all included matters when you're trying to keep total build cost down.

Compatibility is listed for the Raspberry Pi 3 Model B, 3 Model B+, and the Raspberry Pi 4 Model B. That's a broad range covering the most popular Pi boards in active use right now. The Raspberry Pi 4 in particular runs noticeably hotter than its predecessors, so the inclusion of active cooling isn't just a nice-to-have on that board, it's genuinely useful. The four-layer design also leaves the GPIO header accessible via the extension included in the kit, which matters if you're planning to attach HATs or other add-ons.

Active cooling is the second major selling point. The included 30mm fan connects to the Pi's 5V GPIO pins (pins 4 and 6 in the standard configuration) and runs continuously when the Pi is powered. There's no PWM speed control or temperature-triggered switching here, it's just on or off. For most Pi projects that's absolutely fine, and the fan does make a measurable difference to sustained load temperatures on the Pi 4. I ran a couple of CPU stress tests during my two weeks with this, and with the fan running and heatsinks applied, the Pi 4 stayed comfortably below thermal throttling thresholds where it would otherwise start to struggle. The official Raspberry Pi documentation recommends keeping the SoC below 80°C for sustained operation, and this setup managed that without drama.

The three included aluminium heatsinks are sized for the three main heat-producing components on the Pi 4: the BCM2711 SoC, the VL805 USB controller, and the LPDDR4 RAM package. They're adhesive-backed, which makes installation straightforward, though the thermal adhesive quality on budget heatsinks like these is always a bit of a lottery. The GPIO header extension is a small but thoughtful inclusion. Without it, the top acrylic plate would sit directly on the GPIO pins, blocking access entirely. With the extension fitted, you can still use the full 40-pin header for HATs, sensors, or whatever your project requires. It's a small thing, but it shows someone thought about actual use cases when designing this kit.

The clear acrylic finish is worth mentioning as a deliberate design choice rather than just a cost-saving measure. If you're building a display project, a retro gaming console, or anything where the Pi itself is part of the aesthetic, being able to see the board and its status LEDs is genuinely useful. It also makes it easy to check cable routing and spot any obvious issues without disassembling anything. On the flip side, if you want something that looks polished and professional on a desk, bare acrylic with visible standoffs and a tiny fan isn't going to win any beauty contests.

Under sustained full CPU load (all four cores pegged at 100% for 10 minutes), the Pi 4 without any cooling hits around 80-82°C and starts throttling. With just the heatsinks, that came down to about 72-74°C, still warm but below the throttle point. With the fan running as well, sustained load temperatures settled at 58-62°C. That's a genuinely good result for a budget acrylic case with a tiny 30mm fan. The Pi 4 is notoriously thermally challenged, and this setup keeps it in a comfortable operating range for the vast majority of workloads. If you're running a Pi 4 as a lightweight home server, a media player, or a retro gaming box, you're not going to hit thermal issues with this case.

The fan noise is worth addressing honestly. At 30mm diameter running at 5V continuously, it's audible. Not loud, but you'll notice it in a quiet room. I measured it at roughly 35-38 dB at about 30cm distance, which puts it in the "background hum" category rather than "genuinely annoying". If you're putting this in a living room or bedroom and you're sensitive to fan noise, it might bother you. In a home office or workshop environment, you'll stop noticing it within a day. There's no way to control the fan speed without additional hardware or software PWM configuration, which is a limitation worth knowing about. Some Pi users wire the fan through a GPIO-controlled transistor to get temperature-triggered control, and that's a reasonable modification if you want quieter operation at idle.

I also tested the case with a Raspberry Pi 3 Model B+ for a few days, running it as a lightweight Pi-hole DNS server. The Pi 3 runs cooler than the Pi 4 to begin with, so the thermal performance here was almost overkill. Temperatures stayed well below 60°C even under moderate load. The fan is arguably unnecessary for Pi 3 use, but it doesn't hurt, and the heatsinks are still worth fitting. One thing I noticed: the case fits the Pi 3 B+ slightly less snugly than the Pi 4, with a small amount of lateral movement possible. Not enough to cause any issues, but the fit isn't quite as precise as on the Pi 4.

The acrylic itself is on the thinner side. Each panel feels like it's around 2-3mm thick, which is standard for this type of case but does mean it's not going to shrug off being dropped or knocked off a desk. Acrylic is brittle by nature, and while the case will handle normal desktop use without issue, it's not something I'd want to carry around in a bag without additional protection. The protective film on the acrylic panels needs to be peeled off before assembly (both sides), and this is one of those fiddly jobs that takes longer than it should, particularly on the smaller cutout areas where the film tears rather than peeling cleanly. Minor annoyance, but worth knowing about.

The brass standoffs and screws are decent quality. They tightened down properly without stripping, and the standoffs are the right length to give the correct clearance between layers. The fan mounting is a bit more agricultural: it's held in place by two small screws through the top acrylic plate, and the mounting holes are just large enough that the fan can sit slightly off-centre if you're not careful during assembly. It stays in place once tightened, but it's not the most elegant mounting solution. The overall assembly, once complete, is reasonably rigid. There's a small amount of flex in the acrylic panels if you squeeze the sides, but nothing that feels like it's going to crack under normal use.

Compared to injection-moulded plastic cases at similar prices, the acrylic construction is both better and worse in different ways. Better because the clear finish looks distinctive and the laser-cut accuracy is generally good. Worse because acrylic scratches more easily than ABS plastic and is more vulnerable to impact damage. If you want something that will survive being knocked around, a solid ABS case is more durable. If you want something that looks interesting and shows off the Pi, acrylic wins. It's a genuine trade-off rather than one being objectively superior.

The GPIO fan connection is the one step that trips up beginners. The fan comes with a two-pin connector, and you need to connect it to the correct 5V and ground pins on the Pi's GPIO header. The instructions show which pins to use, but if you're new to GPIO pinouts, it's worth double-checking against the official GPIO documentation before powering up. Connecting it to the wrong pins won't damage anything (the fan simply won't spin, or will spin at the wrong voltage), but it's a common source of confusion in the reviews I read before testing. The included GPIO header extension also needs to be fitted before you close up the case, and it's easy to forget this step and then have to partially disassemble to fit it.

Day-to-day use is straightforward once assembled. All ports are accessible through the cutouts, the microSD card slot is reachable (though a bit fiddly with the case on, as is true of most Pi cases), and the status LEDs are visible through the clear acrylic. Disassembly for maintenance or board swapping is easy enough: just unscrew the standoffs and the whole thing comes apart in layers. This is actually one of the advantages of the stackable design over snap-together cases, where you sometimes have to fight the case to get it open without cracking something.

One practical note: the fan runs from the moment the Pi powers up, with no software configuration required. That's convenient if you just want it to work without any setup, but it does mean you can't easily turn it off without either physically disconnecting it or writing a simple GPIO script. For most use cases, always-on cooling is fine. But if you're using the Pi for something intermittent and you want it to be silent when idle, you'll need to do a bit of extra work. It's not a dealbreaker, just something to be aware of going in.

The GPIO header extension included in the kit is a standard 40-pin 2x20 female-to-male extension, compatible with any HAT or add-on board that uses the standard Raspberry Pi GPIO pinout. This covers the vast majority of Pi accessories, including popular HATs from manufacturers like Pimoroni, Waveshare, and others. The extension adds a few millimetres of height to the GPIO header, which means some HATs that sit very close to the board surface might not seat quite as firmly as they would without the extension, but in practice I didn't encounter any issues with the HATs I tested.

It's worth being clear about what this case does not support. It's not compatible with the Raspberry Pi 5, which has a different board layout and port positions. It's also not designed for the Pi Zero, Pi Zero 2 W, or the Compute Module variants. If you're running a Pi 5, you'll need a different case entirely, and there are some good options available for that board. The Pi 4 is still widely used and actively supported, so the compatibility range here covers a large installed base, but it's worth checking your specific board before purchasing. The Raspberry Pi product range has expanded significantly over the years, and not all cases keep up.

Network and wireless connectivity is entirely handled by the Pi itself, not the case, so there's nothing to say there. The case doesn't interfere with the Pi 4's dual-band WiFi or Bluetooth, and the acrylic construction doesn't attenuate wireless signals the way a metal case might. If you're using the Pi in a location where wireless signal strength matters, the acrylic case is actually a better choice than an aluminium enclosure for that reason alone.

Retro gaming builds are another strong fit. The clear acrylic looks great with the Pi's LEDs visible, and if you're building a desktop retro gaming box with RetroPie or Batocera, the aesthetic works well. Emulation on the Pi 4 can push the CPU hard, particularly for more demanding systems like N64 or Dreamcast, so the active cooling is genuinely useful here rather than just precautionary. The GPIO header extension also means you can add a controller HAT or other accessories without having to remove the case.

Educational and maker projects are probably the sweet spot for this case. If you're teaching someone about Raspberry Pi, building a prototype, or working on a project that involves regular access to the GPIO pins, the stackable design is ideal. You can add layers as your project grows, the clear panels let you see what's happening inside, and the whole thing comes apart easily when you need to swap components or add hardware. The low price also means you're not precious about it, which is exactly the right mindset for a project case.

Where I'd steer away from recommending this is in any application where the case needs to look professional or survive rough handling. If you're deploying a Pi in a commercial or semi-commercial setting, or if it's going to be handled regularly by people who aren't careful with electronics, the acrylic construction isn't robust enough. An aluminium case or a proper injection-moulded ABS enclosure would be a better choice for those scenarios. Similarly, if you're running a Pi 5 or a Pi Zero, this case simply isn't the right fit.

The 4.5-star rating across 232 is a meaningful data point. That's enough reviews to be statistically significant, and a 4.5 average suggests that the majority of buyers are genuinely satisfied rather than just not bothered to complain. Reading through the reviews before and during my testing, the common praise points are the ease of assembly, the thermal performance improvement, and the value for money. The common complaints are the fan noise (consistent with my own findings) and occasional reports of acrylic cracking during assembly if standoffs are overtightened. That last point is worth heeding: tighten the standoffs firmly but don't go full gorilla on them.

Compared to spending more on a premium aluminium case, you're making a clear trade-off. Aluminium cases offer better durability, better thermal mass (though often without active cooling), and a more professional appearance. But they typically cost two to three times as much, and for a home project or educational use, that premium is hard to justify. The budget tier is the right tier for this product, and within that tier, the RAS-PCS46 is one of the better-specified options available. The inclusion of active cooling at this price is the key differentiator, and it's a meaningful one for Pi 4 users in particular.

The other common alternative is the basic GeeekPi acrylic case, which is a similar stackable design but typically ships without a fan or heatsinks, leaving you to source those separately. The GeeekPi case itself is slightly better quality acrylic with thicker panels, and the assembly is marginally more refined. But once you add the cost of a fan and heatsinks, the total spend is higher than the RAS-PCS46 bundle, and the end result is functionally similar. The Micro Connectors case wins on value when you factor in the complete bundle.

Here's the thing about this category: you're not buying a case for its own sake, you're buying a thermal management and protection solution for a Pi board that costs significantly more than the case. The right question isn't which case is the best case, it's which case best serves your specific project. For most home users running a Pi 4 on a desk or in a cabinet, the RAS-PCS46 hits the right balance of price, thermal performance, and practicality.

The complaints cluster around a few specific issues. Fan noise comes up regularly, which aligns with my own experience. It's not a loud fan, but it's a continuous fan, and in a quiet environment that's noticeable. A handful of reviews mention acrylic cracking during assembly, almost always attributed to overtightening the standoffs. This is a genuine risk with acrylic, and the fix is simple: don't overtighten. Finger-tight plus a quarter turn is enough. A few buyers have also noted that the protective film on the acrylic panels is difficult to remove cleanly, particularly around the port cutouts. This is a minor but real annoyance that I experienced myself.

There are a small number of reviews mentioning fit issues with specific Pi board revisions, particularly some early Pi 4 variants where the port positions were slightly different. This is worth being aware of if you have an older Pi 4 board, though the vast majority of Pi 4 units in circulation are the standard revision and fit without issues. The overall picture from buyer feedback is of a product that does what it says, at a price that makes sense, with a couple of minor rough edges that are easy to work around once you know about them.

The thermal performance I measured during testing is genuinely good for the price. Keeping a Pi 4 under 62°C at full load with a budget acrylic case and a 30mm fan is a result that would satisfy most users. You'd need to spend significantly more on an aluminium case with a larger fan to meaningfully improve on that, and for home projects, the improvement isn't worth the cost premium. The stackable design adds genuine value for maker projects, and the GPIO header extension is a thoughtful inclusion that cheaper cases often omit.

If you're on the fence, consider what you're actually using the Pi for. Running it as a media player or home server where it sits on a shelf and you never touch it? This case is more than adequate. Building a project where you'll be regularly connecting and disconnecting things from the GPIO header? The stackable design is actively useful. Deploying it somewhere it might get knocked around or handled roughly? Spend a bit more on something more robust. For the majority of home Pi users, though, the budget tier is the right tier, and this is one of the better options in it.

The 4.5-star rating from over 200 buyers lines up with my own assessment. This is a product that does what it says, at a price that makes sense, for the audience it's aimed at. Home users, makers, students, and hobbyists running Pi 3 or Pi 4 projects will find it a capable and practical enclosure. The active cooling is particularly valuable for Pi 4 builds, where thermal management genuinely affects performance under sustained load. The Raspberry Pi OS ecosystem continues to grow, and more demanding applications are becoming common on Pi 4 hardware, making proper cooling increasingly important rather than optional.

Who should skip it? Anyone running a Pi 5 (wrong case entirely), anyone who needs something that looks polished and professional, anyone who's going to be rough with it, or anyone who needs silent operation without additional software configuration. For everyone else, particularly if you're building your first Pi project or setting up a home server on a budget, this is a proper value pick that won't let you down.

I'd score this at 7.5 out of 10. It loses points for the fan noise, the fragility of the acrylic, and the slightly fiddly assembly. It gains points for genuine thermal performance, excellent value, the stackable modular design, and the completeness of the bundle. In the budget tier of Pi cases, it's one of the better options available right now.

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