R
Ross Herbert
When I suggested that the OP could use a Weller TC201 soldering pencil
on 24V DC instead of obtaing a 24V to 12V dc-dc converter, the
question was raised as to whether the switch contacts in the TC201
would be subjected to excessive arcing when breaking the dc heater
current.
After several emails trying to get my query to somebody in Cooper
Tools who knew what they were talking about, I finally received an
answer from a Production Engineer at Cooper Tools (Michael J. Naissen)
which confirmed that there would be no adverse arcing or wear to the
contacts when operating on 24V dc. The same switch unit is used on
their 12V dc soldering tool where the heater carries double the
current of the 24V dc TC201. Therefore the OP can safely use a TC201
directly on 24V dc instead of trying to find a suitable 12V converter.
The full text of the reply is as follows;
QUOTE:
The SW60D switch is made by Weller in the USA. and is made for use
only in Weller soldering tools. The specifications are for internal
use only. If you propose a different use for the switch then please
let me know and I will try to assist you.
The SW60D is also used in the TCP 12, 12 volt tool which is
specifically designed and rated for 12 volts DC and is supplied fitted
with battery clips. At 12 volts DC the current switched is
approximately double the current switched in a 24 volt tool. We do not
have any trouble with early failure of switches in these tools.
The specific answer to your original question is that we are quite
happy to authorise and fully warrant the use of any TC201 or TC201B
tool with a 24 volt DC power supply.
In the event that the switch were to be used for any other purpose
then no warranty would apply regardless of the voltage or whether AC
or DC power was used.
UNQUOTE:
on 24V DC instead of obtaing a 24V to 12V dc-dc converter, the
question was raised as to whether the switch contacts in the TC201
would be subjected to excessive arcing when breaking the dc heater
current.
After several emails trying to get my query to somebody in Cooper
Tools who knew what they were talking about, I finally received an
answer from a Production Engineer at Cooper Tools (Michael J. Naissen)
which confirmed that there would be no adverse arcing or wear to the
contacts when operating on 24V dc. The same switch unit is used on
their 12V dc soldering tool where the heater carries double the
current of the 24V dc TC201. Therefore the OP can safely use a TC201
directly on 24V dc instead of trying to find a suitable 12V converter.
The full text of the reply is as follows;
QUOTE:
The SW60D switch is made by Weller in the USA. and is made for use
only in Weller soldering tools. The specifications are for internal
use only. If you propose a different use for the switch then please
let me know and I will try to assist you.
The SW60D is also used in the TCP 12, 12 volt tool which is
specifically designed and rated for 12 volts DC and is supplied fitted
with battery clips. At 12 volts DC the current switched is
approximately double the current switched in a 24 volt tool. We do not
have any trouble with early failure of switches in these tools.
The specific answer to your original question is that we are quite
happy to authorise and fully warrant the use of any TC201 or TC201B
tool with a 24 volt DC power supply.
In the event that the switch were to be used for any other purpose
then no warranty would apply regardless of the voltage or whether AC
or DC power was used.
UNQUOTE:
