ACTIVES, EEE Components, SPECIFICATIONS / QPLs

New Semicoa Ceramic Package for Surface Mounting of JANS diodes

Posted by Emilio Cano García
On April 25, 2019
0

Semicoa has implemented a new ceramic surface mount package for their qualified rectifier diodes from MIL-PRF-19500/477 Semicoa is a supplier that design and development of bipolar power devices for high-reliability military, defense, aerospace, and space applications for 50 years.

ACTIVES, EEE Components, SPECIFICATIONS / QPLs

Solid Silver Leads in DLA qualified diodes 1N5807/09/11

Posted by Manuel Padial Pérez
On April 24, 2019
0

The U.S. Defense Logistics Agency has approved Solid State Devices, Inc.’s 1N5807, 1N5809, and 1N5811, with axial solid silver leaded hermetic packaging, for inclusion on its Qualified Product List (QPL). JAN, JANTX, JANTXV, and JANS screening levels per MIL-PRF-19500/477 are available for these 6 Amps, 50 – 150 Volts power rectifiers.

ACTIVES, EEE Components

Secondary Power Distribution in Satellites

Posted by Manuel Padial Pérez
On April 8, 2019
1

In modern satellites, the secondary power conditioning unit must supply a wide variety of low voltages, which are required by the payload modules, precisely and without fluctuations even at severe load variations.

ABC of CLR, EEE Components, PASSIVES

Pulse Load, Power and Voltage Derating on Resistors

Posted by Tomáš Zedníček
On March 6, 2019
0

PULSE LOADS In many applications, the resistor will be subjected to pulse loads. We make distinctions between periodical/repetitive loads and pulse trains; on one hand, where the pulse is repeated at a certain frequency, and on the other separate pulses where a possible repetition will occur after so long time that the resistor has recovered its original ambient temperature.

EEE Components, PASSIVES

Magnetic Induction (B) and Flux (F). Faraday’s Law explanation

Posted by Tomáš Zedníček
On March 5, 2019
2

A potential is induced in a conductor loop if the magnetic field passing through the conductor loop changes with time. The surge in potential over the area of the loop is known as the magnetic induction B. Like the magnetic field strength, the magnetic induction B is a vector quantity.

ABC of CLR, EEE Components, PASSIVES

Capacitance, Dipoles and Dielectric Absorption

Posted by Tomáš Zedníček
On March 4, 2019
0

The Capacitance is determined by, among other things, the characteristics of the dielectric material. International standards speak of the Dielectric Constant or permittivity, designated by the symbol ε.

ABC of CLR, EEE Components, PASSIVES

Electrostatic Capacitors Constructional Solutions

Posted by Tomáš Zedníček
On February 27, 2019
0

Capacitors can be divided into two main groups: 1) electrostatic, non-polarized and 2) polarized capacitors. Polarized capacitors can be then divided into electrolytic and supercapacitors. See the following chart with more details. The latter is by their construction polarity dependent with one plus terminal and one minus. The electrostatics don’t have this polarity dependence in their dielectric which therefore can be subjected also to alternating voltages.

EEE Components, PASSIVES

Capacitor for filtering applications in SMPS systems

Posted by doEEEt Media Group
On January 23, 2019
0

The type and amount of capacitors to be used mainly depend on the operating conditions of the power supply. Selecting suitable filtering capacitors helps to maximize the reliability of an SMPS.

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