Post by thread:] Quick 1N400? question

Colin wrote: > Since 1N4001 through 1N4006 seem to be the same size and price, is there > any place where you'd use a 1N4001 where you wouldn't use a 1N4006? The price where I come from does vary (see below), but in answer to you question above, no. 1N4001 x 1 = £0.05 1N4006 x 1 = £0.08 Brian. -- http://www.piclist.com hint: To leave the PICList spam_OUTpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

Brian, On Mon, 26 Jan 2004 12:36:22 -0000, Brian Clewer wrote: {Quote hidden}> Colin wrote: > > > Since 1N4001 through 1N4006 seem to be the same size and price, is there > > any place where you'd use a 1N4001 where you wouldn't use a 1N4006? > > The price where I come from does vary (see below), but in answer to you > question above, no. > > 1N4001 x 1 = £0.05 > 1N4006 x 1 = £0.08 Where's that? Maplin's 1-off price (inc.VAT) is £0.06 for any of 1N4001 to 1N4007 - see (sorry about the long URL): http://www.maplin.co.uk/products/module.asp?QV=Y&moduleno=19079&Products=18 Cheers, Howard Winter St.Albans, England -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam@spam@mitvma.mit.edu

On Mon, 26 Jan 2004 14:34:28 +0000, you wrote: {Quote hidden}>Brian, > >On Mon, 26 Jan 2004 12:36:22 -0000, Brian Clewer wrote: > >> Colin wrote: >> >> > Since 1N4001 through 1N4006 seem to be the same size and price, is there >> > any place where you'd use a 1N4001 where you wouldn't use a 1N4006? >> >> The price where I come from does vary (see below), but in answer to you >> question above, no. >> >> 1N4001 x 1 = £0.05 >> 1N4006 x 1 = £0.08 > >Where's that? Maplin's 1-off price (inc.VAT) is £0.06 for any of 1N4001 to 1N4007 - see (sorry about the long >URL): >http://www.maplin.co.uk/products/module.asp?QV=Y&moduleno=19079&Products=18 > >Cheers, > >Howard Winter >St.Albans, England In Rapid they are : 4001 0.012 4002 0.017 4003 0.02 4004 0.018 4005 0.02 4006 0.02 4007 0.018 these are 100x but at that price why would you buy fewer than 100 at a time? At 1000x, they are all 0.008 I suspect there may be some performance downside to making a 1KV 4007, otherwise why bother making the lower voltage parts. -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestKILLspammitvma.mit.edu

Its all down to the piv 1N4001 50v 1N4002 100v 1N4003 200v 1N4004 400v 1N4005 600v 1N4006 800v 1N4007 1000v You wouldn't use a 1N4001 for direct rectification of 240v ac mains in a switch mode. In that case you'd need a minimum of a 1N4005, and anything higher. {Original Message removed}

> From: Colin Constant[SMTP:.....colinpiclistKILLspam.....HOTMAIL.COM] > Sent: Sunday, January 25, 2004 8:10 PM > To: EraseMEPICLISTspam_OUTTakeThisOuTMITVMA.MIT.EDU > Subject: [EE:] Quick 1N400? question > Since 1N4001 through 1N4006 seem to be the same size and price, is there > any place where you'd use a 1N4001 where you wouldn't use a 1N4006? > I looked at the FAIRCHILD datasheet, and I can't see any difference other > than PRV. > Basically, can I just buy the 1N4006 and be done with it? > Thanks, > Colim It is possible that the 1N400? family is manufactured with a single process and the diodes are then tested and labelled according to their measured PRV. Since higher PRV makes the diode more useful, it would be assumed that 1N4007 would sell for more than 1N4001, making the distinction useful from an economic standpoint. The manufacturers aren't going to discard the lower rated units, so they sell them marked for lower PRV. For some market related reason, all members of the family sell for the same price (roughly), so you would only buy the lower rated devices if your supplier is out of 1N4007 stock and you didn't need the higher voltage. Think of it as recycling the poorer performers, but only when necessary. John Power -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestspam_OUTmitvma.mit.edu

On Mon, 26 Jan 2004 18:47:25 -0000, you wrote: >Its all down to the piv > >1N4001 50v >1N4002 100v >1N4003 200v >1N4004 400v >1N4005 600v >1N4006 800v >1N4007 1000v > >You wouldn't use a 1N4001 for direct rectification of 240v ac mains in a >switch mode. In that case you'd need a minimum of a 1N4005, and anything >higher. I think you missed the original question, which was that as they are all pretty much the same price, why would you ever use anything other than a 4007 ? {Original Message removed}

The 1N400x series are workhorse power rectifier diodes, and do not have anything like "flashy" specs. As such, the argument that you can use the 1N4007 - 1N4001 inter- changeably is correct. However, the PIV rating of the diode is determined by the physical properties of the junctions, and as such there are side effects. In general a higher PIV diode also has a slightly higher forward voltage drop & possibly a slightly lower junction capacitance. In any application where either of these considerations is important you would not be likely to use the 1N400x family in any case. Roy J. Gromlich ----- Original Message ----- From: "Mike Harrison" <@spam@mikeKILLspamWHITEWING.CO.UK> To: <KILLspamPICLISTKILLspamMITVMA.MIT.EDU> Sent: Monday, January 26, 2004 2:34 PM Subject: Re: ] Quick 1N400? question On Mon, 26 Jan 2004 18:47:25 -0000, you wrote: {Quote hidden}>Its all down to the piv > >1N4001 50v >1N4002 100v >1N4003 200v >1N4004 400v >1N4005 600v >1N4006 800v >1N4007 1000v > >You wouldn't use a 1N4001 for direct rectification of 240v ac mains in a >switch mode. In that case you'd need a minimum of a 1N4005, and anything >higher. I think you missed the original question, which was that as they are all pretty much the same price, why would you ever use anything other than a 4007 ? {Original Message removed}

Cum on I was using 1n 4004 as varicap diodes for transmitters in 1979 they were the cheapest solution 33 mhz osc and a Tripler broadcast band tx made loads for pirate radio stations in the late 80's they work ok at audio when coupled to an osc with 3.3pf large area silicon reverse biased 1N4004 (Varicap) and all for less than a penny BA102's / BB ??? MVAM ??? were pounds and didn't do a better job Steve.... {Original Message removed}