What’s New Take an alternative bus route
an energy efficiency optimiser algorithm, the BMR453 and BMR454 devices are said to offer fully regulated outputs at power levels and efficiencies usually associatedwith un-regulated or semi-regulated bus converters. The BMR453 packs up to 396Winto a quarter
Campbell Collins announces availability of a newrange of energy optimised intermediate bus converters fromEricsson PowerModules.
Based on a digital core controller embedding
brick packagemeasuring 57.9 by 36.8mmand is available either as an open frame package for convection cooled applications, ormounted with a baseplate for conduction cooling. Factory preset output voltages are available fromthree
Relays are easy PV
Finder has extended its relay rangewith versions designed to suit photovoltaic (PV) inverters, domestic appliances and other equipment needing reinforced insulation, high ambient temperature handling and full disconnection contacts. The latest introductions comprise the 45.31 16A rated mini PCB relay and three special variants of the 66 series 30A rated power relays.
With an extended threemillimetre contact
gap, the single pole NO 45.31 relaymeets the requirements of the EN60730-1 for household use and is rated for operation at an ambient
temperature up to 105°C. It has a 24V DC coil rated at 360mW. In commonwith the 66 series specials, it has been designedwith an eightmillimetre clearance and creepage distance, ensuring safe separation of supply and output and reinforced insulation between coil and contacts, as per EN60335-1.
The two-pole NO (DPST-NO) 66.22-x600,
66.22-x600S and 66.82-x600 30A power relays ensure a contact gap separation of 1.5mm, as per the VDE0126-1-1 standard for PV inverter applications. In addition, the 600S variant provides a fivemillimetre air gap between
Lower cap counts
relay base and PCB for extra cooling, particularly in forced air cooling systems.
www.findernet.com Going underground
Kemet has expanded its polymer tantalumportfolio with new products in: the T528 low equivalent series resistance (ESR) / equivalent series inductance (ESL) series; T521 high voltage series and T520 polymer tantalumseries.
The T528 series introduces a newly constructed 5mOhmZ case design, reducing
overall impedance for high switch frequency decoupling applications. This reduced impedance can lower capacitor piece counts without compromising performance.
Enhancements to the T521 series include 16 and 35V offerings in a number of
capacitance values. This series is ideal for circuits that require higher voltages than are typically available in standard polymer tantalumdevices and better performance than traditional tantalumcapacitors.
Kemet has also introduced six new small case parts in its T520 series. Ideal for
smart phones, notebook computers and other portable electronics applications, the T520 series has expanded its offerings in the A case sizes with voltage ratings of four and 6.3V and capacitance ranges from47µF to 100µF.
www.kemet.com 64 |March 2011
Aerco is now offering a range of cables fromB3 Cable Solutions. Products are covered by G7621/2/3 specifications andmeet the exacting standards of London Underground Limited (LUL) for use in rail environments including stations and platforms.
For sub-surface environments halogen free flame
retardant (HFFR) variants are available (Type 2) that meet LUL's Section 12 requirements for smoke, flame, fire and emissions.
Available in pair and quad constructions, with 0.63
and 0.9mm tinned copper conductors, up to three pair (G7621), 154 quad (G7622), 320 pair (G7623), these cables are ideal for trackside voice and data communications over twisted pairs.
www.aerco.co.uk www.electronics-sourcing.co.uk
to 13V, and efficiencies are as high as 96 per cent. The eighth brick BMR454 offers up to 240Win a 58.4 by 22.7mm package with similar performance. Both families accept the Telco standard 2:1
input voltage range of 36 to 75V and have a standard operating temperature range of -40 to 125°C.
www.camcol.co.uk
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