How to Spec a Halogen Lamp for PCB Preheating: Power, Shape, and the R7s Connection
We build preheating lamps for soldering lines that need one thing: hit the target temperature fast, then hold it steady. The heart of the job is a halogen shortwave infrared lamp—sized and wired to deliver predictable heat without overshooting.
Power, voltage, and size—what actually matters
We choose a 400V halogen lamp because it lines up with plant power. That keeps current lower on the branch circuit, so your cables stay reasonable and your contacts don’t get stressed. At 2500W, you get a lot of radiant power. In plain terms: the board heats up quickly. And the 300mm length? It’s a sweet spot. Long enough to cover typical PCB widths and component zones in one pass, but short enough to keep the footprint tight and the heat focused. Energy goes where you need it, not all over the frame.
The build: coating, quartz, and why R7s matters
The tube is quartz with a reflective coating. That coating helps push infrared energy forward, so more of it actually couples into the PCB. Halogen shortwave output reacts fast when the filament temperature changes. That gives you crisp control during ramp-up and soak—no sluggish response, no guesswork. Then there’s the R7s base. It’s the anchor—mechanical and electrical. It handles high temperatures at the ends, makes lamp swaps easy, and keeps alignment consistent. So after maintenance, the hot zone lands in the exact same spot. No re-adjusting. Just get back to work.
On the line: what you feel when it runs
On the soldering line, preheating with this lamp profile eases thermal shock on components. It also helps solder paste hit the reflow window evenly. The 400V/2500W/300mm combo packs high heat density into a small footprint. So you can preheat fast without redesigning the whole station. Now, that kind of power density needs respect. Keep cooling and clearances right—airflow and spacing matter. Do that, and the lamp runs reliably. And if you want peace of mind, we stand behind it: a two-year quality guarantee, plus local technical support. Spec it, wire it, and keep your line moving.