Forum: Reliability & Maintainability Questions and Answers

Add a Message About this forum
Newer messages are at the top

Previous 5 messages

Posted by: Ray Moran ray.moran@otis.com (ray.moran@otis.com )
Date posted: Fri Feb 23 10:38:57 US/Eastern 2001
Subject: Capacitor Reliability
Message:
Hi,
I have heard that aluminum electrolytics can outgas if subjected to high temperatures. Have any studies been done to quantify this effect as a fuction of temperature? I am using a miniature aluminum electrolytic rated at 105 C, and the max temp it will ever see is 80 C. Is it safe to assume that since I am operating well within the temperature range, any outgassing would be be negligible? Any advice or leads would be much appreciated. Thanks! Ray Moran

Replies:
Al Electrolytic Capacitors
Bruce Dudley Thu Mar 1 13:23:45 US/Eastern 2001

Reply to this message


Posted by: Glen Hanington (ghanington@littlefeet-inc.com )
Organization:Littlefeet, Inc.
Date posted: Wed Feb 21 15:18:03 US/Eastern 2001
Subject: Activation Energy in Arrhenius Equation
Message:
I've seen values of Activation Energy ranging from 0.3eV to 1.2eV in Finn Jensen's book Electronic Component Reliability, the AT&T Reliability Manual uses a value of 0.4eV, and MIL-HDBK-217F2 uses 0.423eV, while some Reliability Engineers use 0.7eV for a value. Without running extensive Life Tests at different temperatures, is there some way to estimate the value of Activation Energy for a system based on the percentage of different types of components used in the system? I want to arrive at an MTBF value for an expensive system using 3 samples and an MTBF goal of 70,000hrs, in as short a time as possible. Any suggestions?

Replies:
Activation Energy
Bruce Dudley Thu Feb 22 14:01:49 US/Eastern 2001

Reply to this message


Posted by: Neo Chee Siong (bre80033@nus.edu.sg )
Date posted: Tue Feb 20 8:50:11 US/Eastern 2001
Subject: Maintainability Index for Wet Areas
Message:
Does anyone know about the construction of a maintainability for wet areas?

Replies: (list all replies)
Maintainability Wet Areas
Bruce Dudley Wed Feb 21 10:55:40 US/Eastern 2001
Maintainability Under Wet Conditions
Floyd Kreuze Tue Feb 27 13:03:47 US/Eastern 2001

Reply to this message


Posted by: gembong b. (g.baskoro@tm.tue.nl )
Organization:PPK
Date posted: Thu Feb 15 10:39:28 US/Eastern 2001
Subject: MEOST
Message:
I'm looking for a bit detailed guideline and or explanation
the so called MEOST (Multiple Environment Overstress Test) Pls advice me if somebody know. gembong

Replies:
Multiple Environment Overstress Testing
Bruce Dudley Mon Feb 19 11:10:31 US/Eastern 2001

Reply to this message


Posted by: Glen Hanington (ghanington@littlefeet-inc.com )
Organization:Littlefeet, Inc.
Date posted: Tue Feb 13 19:04:15 US/Eastern 2001
Subject: Component Reliability Database
Message:
Since we are a relatively new company and have not gone into production with our product yet, I want to develop a component reliability database which will track system operational hours, failures, failure rates, etc., which I can then use to generate more accurate product reliability predictions. I have 2 questions: 1) Is there a canned program that I can buy which will do this for me, or will I have to generate this myself. 2) Once I establish this database, would anyone else be interested in this information?

Replies: (list all replies)
Component Reliability Data Base
Donald Dylis Wed Feb 21 11:32:43 US/Eastern 2001
Reliability DataBase Software
Vincent Brindejonc Fri Feb 23 6:24:11 US/Eastern 2001

Reply to this message


Next 5 messages

| 1...5 | 6...10 | 11...15 | 16...20 | 21...25 | 26...30 | 31...35 | 36...40 | 41...45 | 46...50 | 51...55 | 56...60 | 61...65 | 66...70 | 71...75 | 76...80 | 81...85 | 86...90 | 91...95 | 96...100 | 101...105 | 106...110 | 111...115 | 116...120 | 121...125 | 126...130 | 131...135 | 136...140 | 141...145 | 146...150 | 151...155 | 156...160 | 161...165 | 166...170 | 171...175 | 176...180 | 181...185 | 186...190 | 191...195 | 196...200 | 201...205 | 206...210 | 211...215 | 216...220 | 221...225 | 226...230 | 231...235 | 236...240 | 241...245 | 246...250 | 251...255 | 256...260 | 261...265 | 266...270 | 271...275 | 276...280 | 281...285 | 286...290 | 291...295 | 296...300 | 301...305 | 306...310 | 311...315 | 316...320 | 321...325 | 326...330 | 331...335 | 336...340 | 341...345 | 346...350 | 351...355 | 356...360 | 361...365 | 366...370 | 371...375 | 376...380 | 381...385 | 386...390 | 391...395 | 396...400 | 401...405 | 406...410 | 411...415 | 416...420 | 421...425 | 426...430 | 431...435 | 436...440 | 441...445 | 446...450 | 451...455 | 456...460 | 461...465 | 466...470 | 471...475 | 476...480 | 481...485 | 486...490 | 491...495 | 496...500 | 501...505 | 506...510 | 511...515 | 516...520 | 521...525 | 526...530 | 531...535 | 536...540 | 541...545 | 546...550 | 551...555 | 556...560 | 561...565 | 566...570 | 571...575 | 576...580 | 581...585 | 586...590 | 591...595 | 596...600 | 601...605 | 606...610 | 611...615 | 616...620 | 621...625 | 626...630 | 631...635 | 636...640 | 641...645 | 646...650 | 651...655 | 656...660 | 661...665 | 666...670 | 671...675 | 676...680 | 681...685 | 686...690 | 691...695 | 696...700 | 701...705 | 706...710 | 711...715 | 716...720 | 721...725 | 726...730 | 731...735 | 736...740 |

Add a Message About this forum