Hi Sean, Note that I said I never allow subs for connectors, inductors, LEDs etc. I've never had a problem with capacitors, but I don't allow subs for ones t= hat are important or likely to be problematic, especially Z5U or other high= value ceramics or any that I need special characteristics, like if they wi= ll experience high ripple current. And any subs must have the same tempco, tolerance, voltage etc, so they giv= e me a Y5V when I want a Y7V cap. Most CMs are cautious at first, but once they realize you know what you're = doing, they will try to accommodate your needs and satisfy their own at the= same time. And I've had them suggest subs to me on some jobs, either becau= se they already have stock of something, or they think they can save us som= e money, or delivery time. I've never used off-shore CMs, even though some of them do all or part of t= he work in China or Mexico, but the companies and my contact people have al= ways been domestic. The smallest and largest companies have always been the= easiest to deal with, it's only been the mid-size CMs that have been impat= ient with me. Best regards, Bob ________________________________________ From: piclist-bounces@mit.edu on behalf of Sean B= reheny Sent: Tuesday, July 10, 2018 3:37 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] LM124 Slew Rate vs Temperature? (-55C to 125C) Have you ever been bitten by this policy, Bob? I have definitely had people choose alternates for passives which were problematic. For example, ceramic capacitors can vary in their voltage vs capacitance variation. You can have two, say, 10uF, 0805, 25V ceramic caps and one of them might have 6uF at 10V and another might have only 2uF at 10V. I've also had problems with connectors where cheap knockoff connectors didn't have the right plating and had much higher contact resistance (high current battery connectors in this case). Sean --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .