All Flex has recently been added to NASA’s Goddard Space Flight Center’s Qualified Parts List (QPL) for Thermofoil heaters built in accordance with GSFC S311-P-079E specifications. All Flex can design custom heaters to meet these stringent guidelines or to a customer’s specific need to include space rated thermistors, wire harnesses, and connectors.
In addition to Kapton™ heaters for space flight applications, All Flex also makes industrial grade heaters for aviation, medical and scientific applications. With multiple domestic manufacturing locations All Flex is also certified to Aerospace AS9100, ISO 9001, MIL-PRF-31032/3 & MIL-PRF-31032/4, and is ITAR\JCP registered, RoHS Compliant, and an active IPC member, making them able to support a wide range of military applications as well.\
All Flex was founded as a quick turn prototype and low volume production manufacturer of single and double sided flexible circuits. Today ,All Flex has expanded its capabilities to include multi-layer, extended length Maxi Flex®, Fine-Line Maxi Flex®, rigid flex, sculptured flex, and the aforementioned heater circuits.
For obtain a copy of the press release announcing All Flex’ addition to the NASA QPL, please contact Cover 2 Sales!
Grayhill‘s Touch Encoder is a revolutionary human-machine interface technology that replaces many traditional user input devices, such as switches, keypads and pushbuttons. The Touch Encoder supports tap, swipe and turning gestures with a high-resolution display optically bonded to a PCAP touchscreen. Hundreds of unique screens can be stored, built using user images. Communication with the host system is performed via either USB or CAN (J1939) bus interfaces. And the touch encoder is robust, with high impact resistance and IP67 water resistance.
With an ever-growing library of configurable standard widgets (and custom ones also available), custom user interfaces are easily developed. The intuitive tablet-based development platform allows interfaces to be created, modified and even field-updated.
Contact Cover 2 Sales to learn more about Grayhill’s Touch Encoder or to schedule a demo.
SV Microwave offers the industry’s most user-friendly RF cable builder application, you can specify and order RF cable assemblies on-line and they will ship in five (5) business days! Orders can be please via credit card or purchase order.
With over 125 in-stock, standard connector types (including VITA 67 contacts) and cable combinations available, SV’s RF Cable Builder tool will construct a cable assembly part number, generate a price quote, provide mechanical and electrical specifications, and offer downloadable cable data drawings.
For your RF connectivity needs, contact Cover 2 Sales to discuss SV Microwave!
Aluminum electrolytic capacitors are used in virtually all types of circuit designs. They are commonly used as filtering devices in power supplies. The following blog post includes a number of guidelines to follow when designing with and using electrolytic capacitors. The material has been paraphrased from United Chemi-con‘s technical topics published on their web sit e here.
- Aluminum electrolytic capacitors should not be used in AC applications.
- In DC applications, always confirm the polarity. If the polarity is reversed, the circuit life will be shortened or the capacitor may be damaged. Generally, an intermittent reverse voltage of 1V DC is allowed. Capacitors used in circuits whose polarity is occasionally reversed or whose polarity is unknown require the use of bi-polar capacitors.
Choose a capacitor whose maximum specified temperature is greater than the operating temperature of the application. This will increase the life of the capacitor. If the temperature rating of the capacitor is less than the temperature of the application, the life of the capacitor will be substantially less than expected or the capacitor could fail catastrophically.
In general, for each 10 degree decrease in operating temperature the capacitor life will double. Conversely, capacitor life will be halved for each 10 degree increase in temperature as determined by the following life expectancy formula.
Lx = Lifetime at actual operating temperature Tx
Lo = Lifetime at maximum rated operating temperature
To = Maximum rated operating temperature (°C)
Tx = Actual operating temperature (°C)
Ripple Current/Load Life
The life expectancy of an aluminum capacitor is not only determined by the ambient temperature, but also by the ripple current. The ambient temperature plus the increase in temperature due to ripple current equals the operating temperature.
Do not apply a ripple current exceeding the rated maximum ripple current allowed for the capacitors as do so will result in shortened capacitor life and may result in the capacitor venting or failing catastrophically.
In many cases capacitor heating due to ripple current is more severe than ambient temperature stress. An acceleration rate of approximately 2x for each 5-10°C temperature increase due to ripple current. The following formula used to determine life expectancy:
Lx = Lifetime under actual ambient temperature and actual ripple current
Lo = Lifetime under maximum rated operating temperature and rated DC voltage with no ripple
To = Maximum rated operating temperature (°C)
Tx = Actual ambient temperature (°C)
T = Inside temperature increase (°C) by actual ripple current
K = Acceleration factor, varied from 5 to 10 by product and conditions
If the applied voltage exceeds the rated voltage of the capacitor, the capacitor may be damaged from an increase in leakage current. When using a capacitor with an AC voltage superimposed on a DC voltage, care must be exercised so that neither the peak value of the AC voltage plus the DC voltage exceeds the rated voltage nor that the minimum AC voltage plus the DC voltage inverts the polarity on the capacitor.
When capacitors are connected in series, the voltage distribution across the series may not be uniform. This is due to the normal DC leakage distribution and should be considered in the design process by using a higher rated voltage capacitor and/or using balancing resistors in parallel with each series capacitor.
General purpose aluminum electrolytic capacitors are covered with a sleeve made of polyvinyl chloride or similar material. In addition to the insulating properties, the sleeving is also used for marking. The aluminum can is not insulated from the cathode, and when the internal element needs to be electrically insulated from the can, capacitors specially designed for these insulation requirements should be used. Also, the dummy terminal is not insulated from the cathode and must not be connected electrically to the anode or cathode.
Incorrect soldering may shrink or break the sleeving of the capacitor. Please read the following information carefully before soldering:
- If the soldering iron comes in contact with the capacitor body during wiring, damage to the polyvinyl sleeve and/or case may result in defective insulation or improper protection of the capacitor element.
- When soldering a printed circuit board, care must be taken so that the soldering temperature is not too high and the wave or soldering time is not too long. Otherwise, there will be adverse effects on the electrical characteristics and the insulating sleeve of aluminum electrolytic capacitors. In the case of miniature aluminum electrolytic capacitors, no harm will occur if the soldering process is performed at less than 260°C for less than 10 seconds.
- During soldering, the sleeve may melt or break if it comes in contact with the circuit board traces. To avoid this problem, do not locate circuit board traces under the capacitor body.
- The sleeving may be melted by solder which migrates up through the terminal holes in the circuit board. To avoid this problem, the same application as stated in item 3 is recommended.
- When soldering adjacent components to the capacitor, preheated lead wires or terminals may tear the capacitor sleeve if these terminals come in contact with the capacitor sleeve. Therefore, mount the capacitors carefully so that the adjacent components’ terminals or lead wires do not come in contact with the sleeve, particularly when mounting on through-hole circuit boards.
For surface mounting capacitors, the reflow soldering conditions are specified in the Surface Mount section of United Chemi-Con’s catalog.
If you have any questions about electrolytic capacitors, please contact Cover 2 Sales for assistance!
TDK-Lambda recently launched the CUS100ME series of AC-DC 100W power supplies. The series a ideal for B-rated and BF-rated medical equipment. Industrial (ITE) versions are also available. With C lass I and II (no earth ground connection) operation, the CUS100ME series meets both class B radiated and conducted emissions.
CUS100ME supplies are available with 12V, 15V, 18V, 24V, 28V, 36V and 48V outputs and they operates from an 85V to 264V universal AC input, Operating efficiencies up to 94% are achievable. It can be operated in convection, conduction, or foreced air cooling applications.
The open frame version is in the industry-standard 2″ x 4″ footprint. The CUS100ME is also available in a U-channel configuration. Cover or top fan options are also available.
All the power supplies are certified to IEC/EN/ES/CSA 60601-1, IEC/EN/UL/CSA 62368-1 and IEC/EN/UL/CSA 60950-1 with CE marking for the Low Voltage, EMC and RoHS Directives. CUS100ME units that meet IEC 61010-1 and EN 60355-1 are also available. Both Class I and Class II versions are compliant to EN 55011-B and EN 55032-B (radiated and conducted) and meet the EN 61000-3-2 harmonics, IEC 60601-1-2 Edition 4 and IEC 61000-4 immunity standards.
Product warranty is five years.
TDK Lambda is the leading manufacturer of medical and industrial power supplies worldwide. If you are working on a medical or industrial electronic design, the CUS100ME might be ideal for you!