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We needed something with a tested breaking capacity that actually holds up under industrial loads, and the 22kA to 50kA range on these covers most of our panel builds without overspecing. The fixed-type insallation is pretty much standard for us, and the screw terminals are easier to torque down than some of the compression-style connectors we've dealt with.
For motor control centers and distribution boards running at 400V AC, the 16A to 1250A current range gives us flexibility across different feeder sizes. But you wouldn't want this for DC circuits or high-frequency switching application—the arc extinguishing is air-based and designed specifically for 50Hz AC systems.
What it does is provide overload, short circuit, and under-voltge protection in one compact molded case, and the mechanical life is rated at 20,000 operations with electricla life at 10,000. That's roughly 2-3 times the cycle count we see on cheaper units, and the 20,000 operations or so is what we benchmark for maintenance intervals.
We usually have stock on the 3P and 4P configurations, but confirm lead time if you need a specific current rating above 800A—those tend to move slower. The CE and CCC certifications are in order, and we've got the ISO9001 documentation on file, though the IEC 60947-2 compliance is what actually matters for our inspection protocols.
Ambient temperature range is -5°C to +40°C for operation, which is tighter than some competitors but realistic for indoor industrial panels—most buyers don't realize that storage temperature goes down to -25°C, so it's fine for unheated warehouses. The relative humidity spec at ≤95% at +40°C is actually better than reagent grade for this class of breaker.
One thing we learned from handling these is that the screw terminals need a proper torque driver, not just a hand screwdriver, to avoid intermittent connections during high-current trips—it's a concrete detail that saves callbacks. Anyway, the batch consistency has been solid across the last three orders, and we've got the retest policy in place if a unit doesn't match COA from HPLC-style batch testing.
We typically require a 10-unit minimum per order, but we can flex on that for first-time buyers testing the product in small projects.
Stocked models ship within 5-7 working days. Custom amp ratings or 4P configurations usually take 15-20 days depending on the batch size.
Yes, we include the full type-test report per IEC 60947-2 and the CE certificate of conformity with every shipment. The CCC and ISO9001 docs are also available on request.
The WCM6 is rated for AC 400V only. For 690V applications you'd need our WCM7 or WCM9 series, which have higher voltage ratings.
Store them in a dry area at -25°C to +70°C with humidity below 95%. Keep the terminals covered to prevent dust buildup, and avoid stacking more than 3 cartons high.
