Swapping out the Heraeus short-wave infrared halogen heater 09751741? It’s not just popping in a new part. This isn’t a simple plug-and-play.
You’re matching a very specific thermal personality to a machine that was built around a tight, precise design: fast start-up, intense heat in a small space, and rock-solid output. When your line goes down because a heater burns out, you need a replacement that behaves exactly like the original—electrically, mechanically, and optically. Power, voltage, and fit. The original 09751741 is a short-wave infrared halogen heater wrapped in a quartz envelope. It’s all about speed and intensity. These lamps get up to temperature fast, so you can run short cycles without staring at a “warming up” light. Electrically, the replacement has to hit the same voltage and wattage. If the original was 400V, that voltage is there for a reason: it delivers the power the filament needs while keeping the current manageable for the wiring and connections. Get the voltage wrong and you’re either running too cool or overloading the circuit—and either way, you’re setting yourself up for an early failure. Physically, the length and diameter aren’t just random numbers. The 09751741 is sized to sit perfectly inside its reflector and mounting hardware. If the replacement tube is even a few millimeters off, you lose focus. You get hot spots and cold spots. Or worse, it physically doesn’t fit. It’s only a true drop-in when the dimensions match. What’s inside—and why it matters. The “halogen” part isn’t just a label. Inside that quartz envelope, the halogen cycle keeps the filament stable by redepositing evaporated material back onto the hot zone. So the lamp holds its output over time instead of fading fast. In real life, that means consistent heat, shift after shift. Quartz is the envelope of choice because it can handle the shock of rapid start-up and the high temps needed for short-wave infrared. It also stays clear to the infrared spectrum, so more of the energy goes into heating the target, not getting soaked up by the tube. Termination is where a lot of failures happen in the field. The 09751741 often uses an R7s base—double-ended, linear contacts that carry current and provide mechanical support. R7s is simple to wire, but it demands proper alignment and secure end caps. If the contacts aren’t tight, you get arcing and localized overheating. In rough, vibrating environments, you may also see an SK15 option on compatible variants. The SK15 gives you a more solid mechanical lock, which helps when the machine is shaking. Why this setup exists. This heater is built for industrial processes that need concentrated heat on demand—places like plastic heating and forming, where the cycle time is measured in seconds. Short-wave infrared delivers heat fast, and the compact design squeezes high power into a small zone without forcing you to redesign the whole machine. For engineers, the payoff is predictable performance and easier maintenance. Match the replacement correctly and you keep the same control strategy, the same reflectors, the same mounting pattern. The trade-off is honest: high heat density needs proper cooling and a clean install. Push the lamp outside its rated specs, or let dust and grease bake onto the tube, and you shorten its life. Get the voltage, wattage, length, and termination right, and you have a reliable, repeatable heat source that keeps the machine running.