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power relays

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Journal Articles
EDFA Technical Articles (2004) 6 (4): 26–31.
Published: 01 November 2004
... coalesces into circumferential cracks in the solder joint, and these cracks deepen until catastrophic failure occurs. Copyright © ASM International® 2004 2004 ASM International circuit boards circumferential cracks crazing device pins power relays solder joints httpsdoi.org/10.31399...
Journal Articles
EDFA Technical Articles (2001) 3 (2): 4–8.
Published: 01 May 2001
... were ana- lyzed, and in these coils, corrosion of the copper wire was the failure mechanism. These failed coils came from relays and solenoid valves used in a variety POSITIVE of applications, includ- DC SUPPLY ing automobiles, electri- cal power-generating plants, and point-of-sale COIL soft-drink...
Journal Articles
EDFA Technical Articles (2001) 3 (4): 37–39.
Published: 01 November 2001
... resistivity, silver is widely used as the contact material in switches and relays. In this context, a recent failure analysis dealt with a relay used in the control system of an electric power-generation plant. The coil of this relay was normally energized, so the normally closed contacts were held open most...
Journal Articles
EDFA Technical Articles (1999) 1 (3): 1–28.
Published: 01 August 1999
... to the tester board. This degrades the per- roring sections including the power supply connections. The analog and digital sections of the chip are completely isolated from one another to prevent switching noise of digital supplies from coupling into high-frequency analog logic the November issue will formance...
Journal Articles
EDFA Technical Articles (2019) 21 (1): 26–31.
Published: 01 February 2019
... to these reliability problems.[4] However, other failures are more subtle. One example is the burnout of a subsidiary input line fuse, resulting in no output from the DC/DC converter. This failure generally occurs at power-up and possibly more often when a converter is powered up a short time after the last power-off...
Journal Articles
EDFA Technical Articles (2018) 20 (1): 32–35.
Published: 01 February 2018
... A or more on an unlimited power bus. This could occur if power is applied with a switch, such as a relay, on the power bus, leading to possible damage to the power bus and the switch. In a high-reliability space application, inrush current suppression circuitry (ICSC) is important and necessary to suppress...
Journal Articles
EDFA Technical Articles (2015) 17 (4): 22–28.
Published: 01 November 2015
... parallel to components that can act as mechanical stabilizers against bending, for example, dual-in-line semiconductor chips, relays, and so on. They should be kept as far as possible from the PCB edges, from plugged or screwed connectors, and from on-board push-button switches. Whenever the application...
Journal Articles
EDFA Technical Articles (2013) 15 (2): 4–13.
Published: 01 May 2013
.... Electrostatic discharge-created leakage paths widen and immediately degrade to severe EOS failure signatures when regular application-related power is supplied. At that level, where the devices are already mounted on printed circuit boards (PCBs) and tested within a subsystem or even an end product, it becomes...
Journal Articles
EDFA Technical Articles (2004) 6 (3): 4–11.
Published: 01 August 2004
... layer.22 While the demonstration of these nano-relay devices was remarkable, they require a dual-polarity power system for reversing states. The initial version Fig. 3 Monomolecular rectifier concept Volume 6, No. 3 Fig. 4 Nanotube-based switch Electronic Device Failure Analysis 7 An Overview...
Journal Articles
EDFA Technical Articles (2012) 14 (1): 14–20.
Published: 01 February 2012
... of the Galaxy IV communications satellite failed when two of its metal contacts were bridged by a tin whisker, resulting in widespread pager outages, disruptions to television broadcasting, and the complete loss of the satellite. Similar failures in pure tin-plated relays led to the loss of Galaxy VII...
Journal Articles
EDFA Technical Articles (2018) 20 (4): 16–22.
Published: 01 November 2018
... electrostatic dissipative over time. Noise pulses from electric motor commutators decrease when the carbon contact pads are ground in toward the round shape of the commutator (Fig. 1). Contact behavior in relays and switches degrades due to vibration, corrosive gases, and fretting or curing. Corrosion...
Journal Articles
EDFA Technical Articles (2023) 25 (2): 16–28.
Published: 01 May 2023
... notation.[12] In the next two decades, a pure logicist approach to symbolic AI was extended with the development of heuristic search methods to create expert systems.[13] Equipped with encoded knowledge and powerful heuristic search algorithms, Deep Blue was able to beat Garry Kasparov in 1996. However...