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That 50KA breaking capasity at 400V AC is really what sets it apart for industrial setups where fault currents can spike hard, and it means you're not replacing breakers after every serious overload event because it handles the strike cleanly — we see a lot of facilities using these in main distribution panels. Most buyers actually go with the 250A frame for headroom even if they're drawing less, keeps things flexible if loads increase later. And for the US specifically, it's been our go-to for retrofit jobs where existing gear struggles with high short-circuit ratings.
Compliance is straightforward here because of that it's built to IEC60947-2 and the GB salt-spray standerd, and we regularly provide the CE declaration and test reports for customs clearance — you just need the manufacturer's letter for EU imports, which we include in every shipment. For the UK, it follows the same certification path since it's harmonized, though check if your distributor wants the orginal COA or a notarized copy. It's roughly 107mm wide, so it fits standard DIN rail mounting without special adapters, which saves time on installation.
The mechanical life is rated at 7000 operations, but electrical life is only about 1000, which basically means you want it primarily for protection rather than frequent manual switching — if someone's in and out daily, a contactor would be better. What it does is offer solid overcurrent and short-circuit protection with undervoltage release as an option, though we usually stock thermal-magnetic version by default. You'll need to specify when ordering if you want the undervoltage trip unit.
Ordering is simple — typical minimum order is 10 units for stock orders, though our company can do smaller lots for sample testing, and lead time is usually 15 days or so once our company have the specs confirmed. We keep 40 units in our EU warehouse at all times, but for the ARM3-250L high breaking capacity variant, it's best to give us a week's notice on volume above 50 pieces. Just send the current rating and any special accessories like auxiliary contacts or shunt trips — is the manual operation handle isn't included by default, so flag that if you need it.
Our MOQ for the ARM3-250L is 10 units for standard models. For custom configurations or larger orders, we can adjust based on your needs.
Lead time is usually 15-20 working days for standard orders. If you need a rush, let us know and we can try to expedite.
Yes, it's certified to IEC60947-2 and GB/T2423.18. We can provide the test reports and a copy of the certificate with your shipment.
Absolutely, the ARM3-250L is adjustable within that range. You can set it to any current rating like 160A or 200A, and we can also customize the trip settings if needed.
Store it in a dry, ventilated area with temperatures between -5°C and 40°C. Avoid direct sunlight and high humidity to keep the reinforced BMC base and nylon cover in good shape.
