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It's Cheap. It Works. It's Dangerous! #aliexpress #gadget #review #ptc #heater #solder #reflow

The video reviews an ultra‑cheap aluminium‑plate PTC heater sourced from Aliexpress for roughly €4, positioning it as a low‑budget alternative for reflow soldering printed circuit boards. The creator demonstrates the unit’s quick heat‑up time and its self‑limiting temperature characteristic, which caps around 235 °C – a temperature acceptable for most surface‑mount components. Key technical points include the PTC element’s resistance profile: low resistance when cold, rising sharply as temperature increases, thereby throttling current and stabilising the plate without external control circuitry. The heater reaches its peak within seconds and maintains a steady temperature, offering a functional, if rudimentary, heat source compared with pricier professional hot‑plates. The reviewer notes safety shortcomings, highlighting exposed wiring in close proximity to the metal plate and the absence of proper earthing. A direct quote underscores the concern: “I’m really not a fan of the safety aspects of this thing with wires super close to metal without any proper earthing.” This leads to a negative overall rating despite the device’s functional performance. For hobbyists and makers, the heater provides an affordable entry point to PCB reflow, but its lack of safety features makes it unsuitable for production environments or users lacking electrical‑safety expertise. The trade‑off between cost and risk underscores the need for caution when adopting such DIY solutions.