Introduction
We built the JHC 400V 2500W 315mm infrared halogen lamp for one reason: industrial machines that need intense, focused heat in a small space. This isn’t a general-purpose bulb you grab for just anything. It’s a purpose-built heater, built to jump to temperature fast and keep running steadily, even when the machine never really stops. The 400V rating paired with 2500W means serious heat output. And the 315mm length with an R7s base? That’s the practical part—it drops right into many existing heating setups without a major redesign.
The Power, Voltage, and Size—Plain Talk
At 400V, this lamp pulls around 6.25A. Why does that matter? Because running at 400V instead of 230V gives you the same wattage with less current. Less current means less heat loss in the wiring and less strain on your contactor and terminals. The 315mm length is a smart compromise. It gives you enough radiating surface to spread the heat evenly, without forcing you to rework the reflector or mounting brackets. This lamp is dense—watt-for-watt, it responds quickly. When you flip it on, the temperature climbs fast. That’s exactly what you want when your process cycles on and off. But here’s the catch: that speed comes with responsibility. Your machine has to manage heat. If surrounding parts can’t shed it, the lamp will run hotter than it should, and nearby electronics will feel it.
What It’s Made Of—Halogen, Quartz, and the R7s Base
Inside, the halogen cycle keeps the quartz envelope clean by returning tungsten back to the filament. The payoff is simple: stable output and consistent heating over the lamp’s life—no dimming or blackening like you get with standard incandescent bulbs. Quartz handles the heat, too. It can sit at high filament temperatures and takes thermal shock in stride, so repeated cold starts don’t crack it. Then there’s the R7s double-ended connector. It’s an industrial choice that just works. It makes solid contact, handles the current, and installation is straightforward—slide it in and lock it down. When a lamp does burn out, replacement is quick, so your machine gets back online without a long downtime.
Where It Shines—And What to Watch For
You’ll typically see this lamp spec’d into equipment that needs concentrated infrared heat: plastics heating, sealing bars, and heating zones where fast response and high watt density matter. The 400V 2500W combo gives you more heat per amp, which can mean smaller wire and less stress on contactors. It’s reliable, serviceable, and fits standard fixtures. But you trade for that power: 2500W packed into a 315mm tube makes the surrounding area seriously hot. Plan for clearance, get the reflector geometry right, and make sure airflow is doing its job. When the machine is designed around it, this lamp delivers predictable heat, repeatable cycle times, and an easy replacement path when it’s time for a new one.