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2 amp DPDT relay - 2A * 2 or 1A * 2 — Parallax Forums

2 amp DPDT relay - 2A * 2 or 1A * 2

W9GFOW9GFO Posts: 4,010
edited 2010-02-05 02:19 in General Discussion
I am using this DPDT relay rated at two amps. Does that mean that each pole is 2 amps (4 amps if paralleled), or is it 1 amp per pole? It doesn't make it clear in the datasheet.

Rich H

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The Simple Servo Tester, a kit from Gadget Gangster.

Comments

  • Peter KG6LSEPeter KG6LSE Posts: 1,383
    edited 2010-02-02 15:21
    usely is per contact in almost every relay I have ever seen ..

    Can you link to the data sheet ?


    Peter KG6LSE

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    "Carpe Ducktum" "seize the tape!!"
    peterthethinker.com/tesla/Venom/Venom.html
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  • W9GFOW9GFO Posts: 4,010
    edited 2010-02-02 15:24
    That what I was thinking but I expected it to be clear in the datasheeet - which is linked above ^^^^.

    Here it is again: http://panasonic-denko.co.jp/ac/e_download/control/relay/signal/catalog/mech_eng_tx.pdf

    Rich H

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    The Simple Servo Tester, a kit from Gadget Gangster.
  • Peter KG6LSEPeter KG6LSE Posts: 1,383
    edited 2010-02-02 15:31
    that " Link blue" looks black text...*facepalm*

    Yup just from looking to the sheet its per contact..

    {
    Rating
    Standard contact: 2 A 30 V DC, AgPd contact: 1 A 30 V DC (resistive load) <<<<<<<<<<<<<<<<< 2A
    Max. switching power Standard contact: 60 W (DC), AgPd contact: 30 W (DC) (resistive load)
    Max. switching voltage 220V DC
    Max. switching current Standard contact: 2 A, AgPd contact: 1 A < this is weird but I assume its because the silver one can't handle as much as plain contacts.
    Min. switching capacity (Reference value)*1 10µA 10mV DC
    }


    Peter KG6LSE

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "Carpe Ducktum" "seize the tape!!"
    peterthethinker.com/tesla/Venom/Venom.html
    Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
    LOL
  • kwinnkwinn Posts: 8,697
    edited 2010-02-03 04:25
    The data sheet specifies a 2A "contact" rating so that is per contact. I have never seen a relay current rating that is not per contact. That is probably because small variations in contact resistance could cause one contact to carry far more current than than the other if they are paralleled.
  • Alan BradfordAlan Bradford Posts: 172
    edited 2010-02-05 02:19
    I use the TQ series relays and these are also in the same group.
    Be careful about what you switch. Inductive loads even if they are within the V-A range can arc and weld the contacts shut easily.
    There is not much seperation in the PC mount relays.
    Be careful of the 30 V Dc rating fr the same reason.

    Good Luck

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    Alan Bradford ·N1YMQ

    Plasma Technologies
    Canaan NH 03741
    www.plasmatechnologies.com
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