Help please!  Circular multipole (5015) connectors - Page 1
Forum section: electronics / general

author: knotlogic
author_rank: Regular Contributor
timestamp: August 25, 2017, 03:31:27 am
content: I could really use some help with this. I've spent the past few days trying to figure out circular multipole connectors. I have a one off project I'm working on that could use one, but the sheer variety and amount (and quality) of documentation out there is doing my head in!So I figured I could use what they call the 18-11 contact arrangement, 5 pins of 12 gauge each, described in a Amphenol MIL-5015 product datasheet, and later saw that there were commercial variants. But the commercial version of a 18-11 arrangement I found is11 smaller pins, and they don't have a 5x #12 configuration. Then there's the plug types, the classes, the accessories I need, what's compatible with what.... And then I read that there are the bayonet versions which would work better than screwthreads for this application, but turns out they're not stocked where I shop...So the background:- This is a one off project at work to be used in the same room as a MRI system. So the connectors have to be non-magnetic, but I'm interested in something capable of EMI shielding. From past experience, I've seen these types of connectors used. They have a cadmium plate / chromate finish (?) which isn't RoHS compliant, but that's fine in this case.- It will be used for carrying power. The #12 contacts look like they'll do the job.- I'm going with solder cups on this one. Sure crimp connectors are better for reliability, but this a one off and I won't be able to justify the tooling.- Suppliers - I can order from Farnell, RS or Mouser. I couldpossiblyorder from elsewhere, but ordering from those three would make my life so much easier.What I've been looking at are the MS range of connectors from Amphenol. Ithinkthis is the product page, but the datasheet I most often have come across isthis one. I'd prefer a bayonet system (because users) but I haven't found one stocked by my three vendors of choice. This MS series seems to be stocked at Farnell and Mouser at least.What I can't figure out is exactly which parts I need to purchase. There seem to be three general classes of the same types of connectors, A & C, E & F, and R. I was going to go with what I think is the bog standard A or C type, but it looks like the plugs need some additional backshell that's a separate item.Is anyone familiar with this system of connectors? I plan to use a pair of box mounting receptacles, one pins, one sockets. What I could use help with is:Can I mix and match classes? (ie a class A receptacle with a class E plug?) Or do they have to match?Would class E/F be the easiest way to go in terms of plugs? Those seem to come with the backshell, but does that complicate assembly? If I go with A/C class plugs, what do I need to order for a full plug?Are the contacts in this series replaceable? Do they typically come with a plug / socket or are they a separate order? I know I've read that some series are fixed and some use "rear release contacts" but I'm not sure which this is.Are there any other "gotchas" that I should know about?Thanks in advance! You'll be saving me a whole new set of white hairs.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: September 08, 2017, 01:49:19 pm
content: - Can I mix and match classes? (ie a class A receptacle with a class E plug?) Or do they have to match?Yes, you can connect between the classes within a series, but you might lose environmental performance, as the one with the lower spec takes the other one with it.- Would class E/F be the easiest way to go in terms of plugs?That depends on the type of cable/wire bundle you use as well as the handling.- Are the contacts in this series replaceable?Solder contacts are generally fixed.If you really want a bayonet coupling, consider a soldered derivative of Mil-C-26482 or MIL-C-38999 S.A short overview of the '5015s:MIL-C-5015CONNECTORS, ELECTRICAL, CIRCULAR THREADED, AN TYPE, GENERAL SPECIFICATION FORCurrent Spec: MIL-DTL-5015H (18 May 2000)Class A - Solid shell solder contact connectorsClass B - Split shell solder contact connectorsClass C - Solder contact connectors for use with pressurized equipmentClass D - Crimp and solder contact connectors for use in high-impact shock conditionsClass DJ - Crimp contact connectors with backshell connector assembly for use in highimpact shock conditionsClass E - Environment resistant solder contact connectorsClass F - Environment resistant solder contact connectors, with clampClass H - Hermetic solder contact connectorsClass K - Crimp and solder firewall connectorsClass L - Fluid resistant crimp contact connectorsClass P - Environment resistant potted solder contact connectorsClass R - Crimp and solder contact connector with grommet seal without clampClass U - Fluid resistant crimp contact connectorsClass W - General purpose crimp contact connectorsSeries I - Solder contact connectors (MS3100..3108 and other)Series II - Front release, crimp contact connectors (MS3400...3412)Series III - Rear release, crimp contact connectors (MS3450..6)Series IV - Connector accessoriesMany Sizes and Insert Variants, countless derivative products ranging from super-high-reliable to economy commercial, also plastic variants,Associated Specifications and DrawingsMS3456 Connectors, Plug, Electrical, Rear Release, Crimp Contact, AN TypeMS3105 - Connector, Receptacle, Electric Dummy Stowage. (Inactive for new design)MS3187 - Plug, End Seal, For MIL-C-26482, MIL-C-5015, MIL-C-81703, andMIL-C-83723 Electrical Connectors (Inactive for New Design)MS3188 - Backshell, 90 Degrees, Cable Sealing and Termination Connector, Electric. (Inactive f. new Des.)MS25042 - Cover, Electrical Connector; Plug, AN Type.MS25043 - Cover, Electrical Connector, Receptacle, AN Type.MS27488 - Plug, End Seal, Electrical Connector.AN3111 - Ring-Bonding, Electrical Connector. (Inact. f.n.D.)MS3155 - Connector, Electric, Rear Accessory Design Standard. (Inactive for new design)MS3420 - Adapter, Cable Clamp to Cable, Bushing, Telescoping. (Inactive for new design)MS3480 - Tool, Connector Assembly, For MIL-C-5015 Connectors.MS28900 - Packing, Preformed, For Electrical Use. (Inactive for new design)MS33678 - Connector, Receptacle, Electric, Integral Mounting.MS33695 - Contacts, Video Coaxial Connector.MS90376 - Cap, Dust, Plastic, Electric Connector.Other Designations: CA (ITT Cannon); tbd (Amphenol); AE55 (AEC)Similar Connectors:Specialties:ITT Cannon has Hermetics, Firewall Variants, through-Bulkhead and PCB-mountable VersionsAmphenol has Hermetic Receptacles, through-Bulkhead and PCB-mountable VersionsAmerican Micro (Hermetics)

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: September 08, 2017, 07:21:13 pm
content: Whatever your distributors and the resulting selection of manufacturers are:help yourself to a copy of the MASB /Military and Aerospace Connectors Sourcebook) from ITT Cannon.Helps to get a overview.