Relay turn-off time

[Bennet Williams]

Does anyone know approximately how long it takes for the contacts on a
typical small DC ice cube relay to open after the coil voltage is
removed?

BRW

 

[CWatters]

<Bennet Williams> wrote in message
news:q627k09qc1gc067372lo2acp7357lsl70f@4ax.com...

Does anyone know approximately how long it takes for the contacts on a
typical small DC ice cube relay to open after the coil voltage is
removed?

Usually listed in the specs somewhere.

 

[Tony Williams]

In article <q627k09qc1gc067372lo2acp7357lsl70f@4ax.com>,
Bennet Williams <> wrote:

Does anyone know approximately how long it takes for the contacts
on a typical small DC ice cube relay to open after the coil
voltage is removed?

I've measured an average of 15mS for a quantity
of the type known as 'Continental Cradle' relays.
That was with a diode directly across the coil.

--
Tony Williams.

 

[Bennet Williams]

Thanks for the info. The data sheet for the relay did not have this
information.

BRW

On Sun, 12 Sep 2004 09:55:28 +0100, Tony Williams
<tonyw@ledelec.demon.co.uk> wrote:

In article <q627k09qc1gc067372lo2acp7357lsl70f@4ax.com>,
Bennet Williams <> wrote:
Does anyone know approximately how long it takes for the contacts
on a typical small DC ice cube relay to open after the coil
voltage is removed?

I've measured an average of 15mS for a quantity
of the type known as 'Continental Cradle' relays.
That was with a diode directly across the coil.

 

[Michael A. Covington]

You can measure this, very roughly, by wiring up the relay as a buzzer. I
usually get frequencies between 200 and 800 Hz.

 

[John Fields]

On Sun, 12 Sep 2004 17:38:01 -0400, "Michael A. Covington"
<look@ai.uga.edu.for.address> wrote:

You can measure this, very roughly, by wiring up the relay as a buzzer. I
usually get frequencies between 200 and 800 Hz.

---
Since the frequency depends on both the make and the break time you'd
have to (assuming they were equal) double the frequency and take the
reciprocal of that, no?

--
John Fields