Wholesale TD4-9.4 Terminal Blocks Manufacturer for PCB Wiring and Voltage Connections

Actually, once you start handling these TD4-9.4 blocks, you'll notice teh 9.4mm pitch gives you just enough room for solid wiring without eating up all your PCB space—we've shipped thousands to EU buyers who love that balance between density and ease of access.

For 400/690VAC and 25/13.5A nominal current, it's basically plug-and-play for industiral control panels or power distribution, though we don't recommend them for high-vibration environments where a screw-clamp might lock better.

We usually keep MOQ around 500 units or so for stock orders, and the UL 94V-0 PC housing with brass nickel-tin contacts passes most compliance checks we've seen for US and UK imports, plus our company provide the TDS and SDS with every shipment (lead time is typically 20 days form order).

The 5.0kV surge voltge rating and CTI between 250 and 400 mean these hold up decently in damp conditions, but what it does is give you solid insulation class III coverage without the fudginess of cheaper polyamide blocks—you'll want internal wire section limit of 0.5-4.0mm² kept in mind for smaller stranded wires.

Stripping length runs 5-7mm, which is pretty much standerd for pluggable socket connections, and we've seen labs swap these in for test jigs where quick changeovers matter more than ultra-high cycle life.

If you're importing into the US, we've got the documentation for UL recognition and the COA with HPLC purity data; the -40°C to +130°C operating range covers most plant floor conditions without needing special handling, anyway.