Choosing a control panel enclosure for DIN-rail controls usually comes down to two questions: how much interior space you need, and where the box will live. For terminal blocks, relays, breakers, and other rail-mounted gear, the enclosure needs to be large enough to wire comfortably and robust enough to protect the components from moisture and dust. The four steel boxes below range from a compact indoor unit to a deep cabinet, with prices spanning a wide range.
Quick take
- Need a small, inexpensive indoor box? The Unity Type 1 Steel Control Box is the only sub-$50 option here.
- Need a large enclosure? The two large steel enclosures are close in price; the NEMA 4X model has the lower listed price.
- Need extra depth for bulky components? The cabinet with the most interior room is the one to choose.
Listed price comparison
| Enclosure | Listed price | Price bar | Good for |
|---|---|---|---|
| Unity Type 1 Steel Control Box | USD 40.00 | Small indoor control or junction box | |
| NEMA 4X Waterproof Steel Enclosure | USD 68.64 | Large enclosure with mounting plate, lower price | |
| Industrial Steel Enclosure with Mounting Plate | USD 70.33 | Large enclosure with mounting plate, slightly higher price | |
| Steel Electrical Box Deep Cabinet | USD 139.99 | Deep cabinet for oversized components |
Decision guide
| If you need... | Pick this enclosure | Why |
|---|---|---|
| A small indoor box on a tight budget | Unity Type 1 Steel Control Box | Lowest listed price and UL Listed |
| A large enclosure for a big panel | NEMA 4X Steel Enclosure | $1.69 less than the other large model |
| Extra depth for bulky components | Steel Electrical Box Deep Cabinet | Added depth and a lockable hinged door |
| A second large alternative | Industrial Steel Enclosure | Same footprint, slightly higher price |
Product notes
Unity Type 1 Electrical Enclosure 12x12x6 Steel Control Box UL Listed 12" x 12
The Unity Type 1 Electrical Enclosure is the low-price, small-footprint choice at $40.00. It's a 12 x 12 x 6-inch steel box with a gray powder-coated finish and a screw-on cover that isn't hinged. The enclosure is UL Listed and intended for indoor use, so it's not the box for wet locations. Its condition is new open-box, so it may show minor handling marks even though the enclosure itself is unused. If you need a basic indoor housing for a small control panel or junction box and want to keep the budget tight, this is the one to start with.
NEMA 4X Steel Enclosure 24x24x8" IP66 Waterproof Electrical Box w/Mounting Plate
If you're watching the price on a 24x24x8 enclosure, this NEMA 4X Steel Enclosure comes in at $68.64, making it the cheapest large box in this group. It shares the same outer dimensions, inner depth, galvanized backplate, and mounting plate as the other large model. It's a waterproof enclosure, which makes it an easy pick if moisture is a concern. The trade-off is that there's very little practical difference between this and the slightly more expensive large model; the lower price is really the main reason to choose this one. Like the other large enclosure, it isn't a light package, so plan for a second person during installation.
24x24x8" Industrial Steel Enclosure Electrical Box NEMA 4X IP66 w/Mounting Plate
This 24x24x8 option gives you a large work area and a galvanized mounting plate sized for your wiring. It measures 24 x 24 x 8 inches, with an inner depth of about 7 inches for components. The carbon steel body and powder-coated finish are details that point to a durable shop-floor enclosure. One constraint: at 55.56 pounds, it's heavy enough that you'll want a second person for installation. Also, at $70.33, it costs a bit more than the other large model, so the price difference may push you toward the other one if you don't have a specific reason to pick this model.
Steel Electrical Box Electrical Enclosure Box 24x24x12'' Carbon Steel IP65
The deepest option is the Steel Electrical Box 24x24x12. The extra 4 inches of depth compared to the other large boxes gives you room for larger breakers, transformers, or wiring troughs. It has a hinged door, and the feature set includes a lock and waterproofing, so you don't have to fully remove a cover to work inside. The galvanized backplate measures 21.7 x 21.7 inches, almost the same usable width as the other large boxes. At $139.99, it costs nearly double the lower-priced large model, so it's best saved for installations where the added depth and hinged access are genuinely necessary.
Final recommendation by use case
- Best value for a large panel: NEMA 4X Steel Enclosure. It gives you the same footprint as the slightly pricier large model for a bit less.
- Best for bulky components: Steel Electrical Box Deep Cabinet. The added interior room justifies the highest price in this group when you actually need that space.
- Best for small indoor jobs on a tight budget: Unity Type 1 Steel Control Box. It's the most affordable enclosure here and covers basic indoor control and junction box needs.
- If you want a second large option: Industrial Steel Enclosure is essentially the same package as the NEMA 4X model, so let the small price gap steer you.
