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For single units the price sits around $18-22, but if you're taking 50 pieces or so we drop to roughly $12-15 each, and at over 500 it gets down closer to $9-11 — it basically scales with volume, which is where most buyers save.
The LONQ-40 handles 1000-1200VDC and up to 32A, which covers pretty much any residential or mid-scale solar setup, so you don't need to overspec unless you're running high-capasity strings. Most commercail installers go for the 4P version at 25A because it isolates both positive and negative lines in one shot, and the ~2ms shut-off time is tight enough for arc suppression. UV-resistant enclosure and IP66 means you'll slap it on a rooftop or ground mount without worrying about rain, heat, or sun damage (usually 5+ years outdoors before any fading). What it does is protect the downstream gear — inverters and batteries mostly — from overcurrent and short circuits, though it's not frequent switching under load if you're doing daily maintenance.
CE/TUV/CB and IEC60947-3 compliance means you can ship these to EU, UK, or Australia without filing extra paperwork; we include COA and SDS with every pallet order. 8000V impulse withstand is better than most cheap isolators, and mechanicla life is 10,000 cycles, so even if you flip it weekly you'll get 15+ years from the handle mechanism.
Actually, one thing most distributors don't ask about is the M20 or M25 gland fit — you'll need to check your cable diameter first because adapters aren't included. We usually have 10A and 16A models in stock, but teh 32A version sometimes backs up 3-4 weeks (lead time on those). It's not suited for DC motor circuits or anything with heavy inductive loads; stick to PV strings or battery banks.
Anyway, the cost picture is straightforward.
2P means it breaks both the positive and negative lines, while 4P can break two separate circuits or handle a double-pole setup for larger solar arrays. You'd pick 2P for most standard string inverters, and 4P if your system needs more isolation points.
Yes, it comes with M20 and M25 solar connector options, so it's compatible with most common PV cables and MC4-style connectors without needing adapters.
Lead time is typically 15-20 working days for stock sizes, and our MOQ is 50 units per model. We can negotiate smaller batches for first-time orders or samples.
Yes, we can share the CE, CB, TUV, IEC, and SAA certificates upon request. All certifications cover the full voltage range up to 1200VDC and comply with IEC60947-3 standards.
Absolutely, we offer 10A, 16A, 20A, 25A, and 32A as standard options. For custom current ratings outside that range, we'd need to check feasibility based on your order volume.
