TDK Lambda - Robot Controller Power Supply Has EN62477-1 OVC III Certification

TDK Corporation announces the introduction of the ZWS240RC-24 AC-DC power supply, rated at 240W output power. This model is an addition to TDK-Lambda’s popular long-life ZWS series of 10W to 300W industrial power supplies. Certification to Over Voltage Category (OVC) III enables direct connection to the incoming AC distribution panel, saving the cost and space of an isolation transformer. Target applications include robot and other machine controllers needing a greater degree of protection from incoming input voltage line transients.

The ZWS240RC-24 accepts an 85 to 265Vac input and can operate convection cooled in ambient temperatures of up to +70°C, derating linearly above 50°C by 3.5% per °C. The 24V output voltage is adjustable from 21.6 to 26.4V to accommodate non-standard voltages. Overall product dimensions are 84 x 42 x 180mm.

Typical hold-up times are 31ms, providing additional protection against extended input voltage dips. Like all ZWS models the ZWS240RC-24 has a warranty of five years, supported by electrolytic capacitor lifetimes of 12-years, for superior operating field life.

The power supply is certified to IEC/EN62477-1 OVC III, IEC/EN/UL/CSA 60950-1 with CE marking for the Low Voltage, EMC and RoHS2 Directives. The model is also compliant to EN 55011, EN 55032 Class B conducted and Class A radiated emissions, EN 61000-3-2 harmonics and IEC 61000-4 immunity standards.

More information can be obtained at the following TDK-Lambda Americas website, http://www.us.tdk-lambda.com/lp/products/zws-series.htm, or by calling 800-LAMBDA-4. Product availability for all the ZWS power supplies can be found via the link to TDK-Lambda’s distributor network (see “Check Distributor Stock to Buy”) at http://www.us.tdk-lambda.com/lp/.

New Cornell Dubilier Capacitor Saves Space!

Aluminum electrolytic capacitors have evolved to meet the small-footprint needs of consumer and military applications thanks to new manufacturing techniques, including laser welds that extend their life even further

The ever-increasing trend toward miniaturization and flatness of electronic devices is a given for consumer markets, but now the demand for smaller power circuits has also spilled into industrial and military applications, in which space and weight savings are requirements for next-generation designs. The challenge for system design engineers is to source smaller components to save space without compromising system life and reliability. This is especially difficult when sourcing for capacitors, which are often among the tallest components on a power-supply board. The alternative is to spread the capacitors over large areas of PC board when banked in parallel to meet minimum capacitance requirements for hold-up and bulk storage. However, capacitor manufacturing technology and techniques are improving, leading to the reinvention of the humble aluminum electrolytic capacitor to achieve flatter package styles to help power-supply designers meet their design needs.

As shown, the space savings potential of the THA series component is substantial when directly compared with boards populated with banks of axial and SMT aluminum electrolytic capacitors for the same capacitance and voltage ratings (5,800 µF, 35 Vdc at 85°C). Note that on the boards containing the tantalum and SMT devices, there is also a lot of unavoidable space between capacitors. In addition to the compactness, tight seals, and robustness of the THA and MLSH components, use of a single component (versus multiple components) greatly simplifies assembly and significantly improves system reliability by reducing component count and connection points to the board. In the banked configurations, the failure of just one capacitor could prevent the entire bank from functioning. As future applications demand thinner storage applications, we will continue to see a corresponding reduction in capacitor profiles. Cylindrical capacitors will continue to dominate where fully optimized space and weight requirements are not required. Even within the flat package design, there is room for continued improvement.

Cornell Dubilier - www.cde.com

Fujitsu Announces EV Charging Relay

Fujitsu Components America, Inc. today introduced a high-voltage DC load switching relay series for the electric vehicle charging market with 13-percent higher voltage switching capability, 77-percent less power consumption, and a package size 40-percent smaller than similar, available relays. The FTR-E1 series is a compact, single-pole PC board relay available with 12VDC and 24VDC coils.It is nominally rated up to 30A, 450VDC (40A max/1hr), resistive, with 900mW power consumption.

The relay’s compact (43.6 x 28.3 x 36.8mm) package weighs approximately 75g, which is nearly 60-percent lighter than competitive devices. In addition, the FTR-E1 series also offers an electrical life of 10K operations at 20A, 450VDC resistive – nearly three-and-a-half-times that of leading products.

With a dielectric strength of 5,000VAC (1 min.) between coil and contacts, the FTR-E1 offers twice the insulation properties of similar relays. Non-polarized contacts enable it to switch between charging and discharging the load, making this relay well suited for use in on-board chargers and charging stations for electric and plug-in hybrid electric vehicles, string disconnection of photovoltaics systems, and high-voltage DC load control systems.

Available immediately, the FTR-E1 is lead-free, RoHS compliant, and cULus recognized. Pricing begins at $29.85 each for single- to 99-piece quantities.