sold - Page 1
Forum section: electronics / general

author: wraper
author_rank: Unknown
timestamp: June 28, 2016, 11:20:48 am
content: ALL SOLDFor sale mercury wetted, double sealed, high power reed relays CLARE HGRM-55211-P00. 100W, 500V DC/AC, 2A switching current, 5A Carry current. Coil voltage: 12V nominal, 35V max, 680 Ohm resistance, 7.5mA pull-in current. Operating rates up to 200Hz. Life expectancy 1x109Ops minimum, 2x109Ops typ.10 EUR/11 USD7.20 EUR/8 USD piece. 2 EUR/2.20USD worldwide shipping (any quantity) with tracking number. Will accept GBP too. Payment with paypal.Datasheets attached.

author: wraper
author_rank: Unknown
timestamp: July 04, 2016, 07:50:49 pm
content: Price reduced

author: cio74
author_rank: Regular Contributor
timestamp: July 04, 2016, 08:02:18 pm
content: Quote from: wraper on June 28, 2016, 11:20:48 amFor now

author: wraper
author_rank: Unknown
timestamp: July 04, 2016, 08:13:45 pm
content: Quote from: cio74 on July 04, 2016, 08:02:18 pmI have about a grand of GBP cash in the drawer and my sister in UK owes me a LOT of GBP too. So this cannot become much worse than that.

author: HighVoltage
author_rank: Super Contributor
timestamp: July 22, 2016, 09:24:51 am
content: What is the normal application for these?

author: wraper
author_rank: Unknown
timestamp: July 22, 2016, 09:57:49 am
content: Quote from: HighVoltage on July 22, 2016, 09:24:51 amAFAIK they were used in telecommunication a lot. What they provide is a huge lifespan and super fast bounce free switching. Also as I understand, they don't need wetting current therefore can switch very low current signals without an issue.Quote

author: timb
author_rank: Super Contributor
timestamp: July 22, 2016, 12:37:03 pm
content: Quote from: HighVoltage on July 22, 2016, 09:24:51 amThey were also used in picosecond rise time pulse generators back in the day. Properly connected (with hardline and GR connectors) they would produce amazingly flat pulses with virtually no aberrations and rise times in the ps range.Tektronix actually made a commercial pulse generator with mercury whetted relays, circa 1960-something. The big disadvantage is the relays have a very finite lifespan. If you forgot to turn the pulse generator off before leaving the lab on a Friday, the relay would be dead on Monday, that sort of thing.

author: Gyro
author_rank: Super Contributor
timestamp: July 22, 2016, 01:22:14 pm
content: Quote from: HighVoltage on July 22, 2016, 09:24:51 am-Self renewing (liquid Mercury) contact surfaces, giving:- Zero contact bounce, fast edges- Ability to switch down to zero voltage and zero current (the only contacts that can do this)- Constant contact resistance throughout life- If used within ratings they have an operating life in the Billions of operations range.Liquid Mercury Contact surfaces, meaning:- They need to be mounted vertically (all contacts close when inverted)- Don't like violent shaking (as above)- They freeze at -38'CThey still have a useful place in one-off test equipment if you can get them (RoHS). They're perfectly safe if you don't break them apart... Hermetic glass reed encapsulation, inside potting compound, inside a metal can.P.S. I don't mind singing their praises here, I've got my own stock.

author: wraper
author_rank: Unknown
timestamp: September 02, 2016, 11:22:47 am
content: bump