Why NASA has to buy Russian rocket engines:

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
POCKOCMOC (Roscosmos) thinks the green one is 10W resistor.
NASA thinks the gold one is 50W resistor.
:D

Seriously, does anyone has some more info on those russian power resistors? I can say that leads are magnetic, but resistor body is not.
 

Attachments

  • resistors.jpg
    resistors.jpg
    13.7 KB · Views: 476
Resistors

POCKOCMOC (Roscosmos) thinks the green one is 10W resistor.
NASA thinks the gold one is 50W resistor.
:D

Seriously, does anyone has some more info on those russian power resistors? I can say that leads are magnetic, but resistor body is not.
Ceramic encapsulated carbon comp. TBO [t-v-o] Near extinction type.
http://www.reom.ru
Can be 60 W rated.
Low inductance, huge overload tolerance.
One shall recall Little Devils, which are epoxy encapsulated.
Google picture of the first American satellite insights.

Dale resistors are the wirewound ones - inductive - no good for anything but DC.
As it was correctly noticed, they do require external heatsink...
Counterpart С5-47
BTW It has nothing to do with space exploration and low price on Energia rocket engines, namely RD-180,
 

Attachments

  • 47.gif
    47.gif
    5.3 KB · Views: 277
AX tech editor
Joined 2002
Paid Member
POCKOCMOC (Roscosmos) thinks the green one is 10W resistor.
NASA thinks the gold one is 50W resistor.
:D

Seriously, does anyone has some more info on those russian power resistors? I can say that leads are magnetic, but resistor body is not.

So that gold one can operate on higher temp than the green one? Probably the gold one is build from better materials.

jd
 
Administrator
Joined 2004
Paid Member
Dont think so, it is smaller, but without heatsink you wont get any 50w rating out of then, maybe not even 10w

RH-50: Actually about 12W without heatsink.. Derating further is a good idea however.

See here for full details on latest Vishay product: http://www.vishay.com/docs/50013/rh.pdf

These are actually pretty rugged and stable resistors. I use them a lot in my designs. There is also a non-inductive type available.
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.