Lead-free (hereinafter called Pb-free) soldering has a technical challenge to meet contradictory requirements of both the high temperature (220°C) for the melting point of Pb-free solder and low-heat resistance of electronic components. Also, electronic component makers demand soldering equipment suppliers a flexible heating control to meet the soldering equirements of highly variable products. Tamura's new TNP25-538EM, the reflow soldering equipment for Pb-free solder, has shorter and narrower heating unit for the reflow zone as compared with those of the pre-heating zone. Adding one more unit to the reflow zone, it allows more detailed profile construction (reflow peak time adjustment) and therefore satisfies both low-heat resistance of electronic components and adequate heating time for a good solder joint.
The new flux recycling system, which consists of two steps for ecycling, has improved the recycling efficiency of the flux.
Additionally, the process controller of this product improves temperature control function, shortens start-up time, and enables the ideal control of heating block in each zone of the reflow oven. It realizes the energy efficiency by stabilizing the temperature under a continuous run.

What is Reflow soldering?

Reflow soldering is a process to attach a surface mount component to a print circuit board.
First, solder in paste form, which is also called “Cream solder”, is applied to a pattern for which surface mount components need to make an electrical connection on a print circuit board. The surface mount components are then placed on the print circuit board. And the print circuit board is heated in an oven to melt the solder and cooled to solidify the solder joint.

Tamura's AC adaptor used for notebook PC has improved its efficiency by pseudo-resonance and reduced standby power requirements. Achieving the best in the business for low standby power, high efficiency, and high power density, it contributes to the reduction of environmental load. Also, our CWX series, the adaptor for personal digital assistance, has a CO2 reduction effect as shown right when compared with conventional line products.

*The above figure was estimated in comparison with our conventional line, under the assumption of 8 h/day operation, always-on, for hundred thousand products manufactured.

This is an AC/DC adaptor with 100-240V continuous input and 12W output. It complies with not only the Tamura's green procurement standard to meet California State's energy regulation to be effective in January 2007, but also the energy efficiency standard for external power devices. The energy efficiency standard requires 0.5W or lower standby power consumption, and the minimum efficiency to be defined by the output electricity. In the case of an adaptor, the energy efficiency needs to be designed taking into account the loss through the output cord. To achieve higher efficiency, we designed this product with an innovated selection of components and circuit configuration.