Account
Inquiry
So you're looking at something for heavy industrial protection, and the YCM3-250L comes up a lot in these conversations — it's basically the workhorse for 250A systems where you need reliabel overcurrent and short-circuit handling without the fancy bells. We've been moving these for years, and what it does is give you a solid MCCB with a manual trip mechanism and air arc extinguishing, which means less maintenance fuss than oil-filled units or vacuum types in certain environments. 2. Now on the specs side, you're looking at a rated insulation voltage of 1000V for the 250 frame (800V if you're on the 125 frame, but that's a smaller unit) and it handles 50Hz or 60Hz just fine. Breaking capacity isn't the highest in the market — honestly, it's low voltage breaker so don't push it past 65kA or so at 400V — but for most distribution panels and motor circuits it holds up perfectly. We'll see pole options in 1P, 3P, or 4P configurations, though 95% of orders are either 3P or 4P for three-phase protection. 3. The insert instalation method is handy if you're racking these into a fixed panel setup — just slide it in and tighten the screw terminals, no special tools needed. Mechanical life is rated at 20,000 operations and electricla life at 10,000, which for a manual breaker in a factory line or substation is pretty much standard and matches what Siemens or ABB offer in this class. 4. Ambient temps form -5°C to +40°C cover most indoor installations, but if you're putting it outside in direct sun you'll want to check the cabinet ventilation — we've had a few returns where someone cooked a batch in a sealed box during a heatwave. Also, it's not suited for DC circuits at all, so make sure you're only using it on AC. Storage tolerance is wider at -25°C to +70°C, and humidity up to 95% at 40°C is fine for coastal environments (we see this a lot in Southeast Asia). 5. Here's a concrete detail from handling thousands of units: the under-voltage release coil is an add-on, not included by default, so if your buyer needs that function they have to specify it during ordering. Lead time is usually 20 workdays or so from order confirmation, and the MOQ is 10 units for the standard 3P variant. 6. Anyway, for COA and batch traceability we provide HPLC purity reports on each batch — wait, that's not for breakers, that's for chemicals. For breakers we give you the CE and CB certificates on request, and each unit gets a factory test report. Just confirm whether you need VDE or CCC cerification for your market, as we keep those documents ready to go.
MOQ is typically 10 units for bulk orders, but we can discuss smaller quantities for first-time buyers or sample requests.
Lead time is usually 15-25 working days after order confirmation, depending on the quantity and pole configuration you need.
Yes, we include copies of CE, CB, CCC, VDE, and ISO9001 certificates with each bulk order. Just let us know which specific docs you need.
Absolutely, we offer 1P, 3P, and 4P options. You can mix pole types in one bulk order, but each configuration needs its own minimum quantity.
Store it between -25°C and +70°C with relative humidity at or below 95% at +40°C. Avoid condensation or direct moisture.
