Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

TO-220 Resistor? Identification help

Status
Not open for further replies.

juz_ad

Full Member level 2
Joined
Dec 17, 2011
Messages
130
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,296
Activity points
2,541

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
48,266
Helped
14,224
Reputation
28,709
Reaction score
12,917
Trophy points
1,393
Location
Bochum, Germany
Activity points
279,523
What are you particularly asking? These are "normal" resistors, but a heatsink is required to utilize the 30 W rating. You may be better off with a regular "air cooled" wirewound power resistor.
 

treez

Advanced Member level 5
Joined
Sep 22, 2008
Messages
7,878
Helped
578
Reputation
1,159
Reaction score
557
Trophy points
1,393
Location
cambridge
Activity points
78,043
Vishay DO A GOOD RANGE OF THOSE TO220 RESISTORS TOO...THEY ALSO DO A TO247 VERSION, a bit bigger for you....maybe you don't need heetsink then (sorry for capitals, )

You get thick film resistors and thin film resistors, whats the difference?, ...NOTHING to you or I!!!, you are only interested in the power rating and sometimes whether its inductive or not.

thin film resistors are usually of better tolerance than thick film, though not always...also "thin film" resistors are supposed to be lower noise than thick film resistors, though what on earth that means I have no idea, -I have never ever heard anybody say that thin film resistors should be used as current sense resistors in smps (as opposed to thick film resistors) because they are lower noise, so there's a lot of "old wives tail-ory" going on here.

YOU SOUND SURPRISED THAT A TO220 PACKAGE COULD BE USED FOR A RESISTOR, WHEN USUALLY THEY ARE USED FOR FETS.......don't be surprised though, as resistors come in all kinds of packages.

Heres one for you, do bathtub resistors need heatsinks of operated at their rated power level?......
https://www.vetco.net/catalog/popup_image.php?pID=12230
 
Last edited:

Audioguru

Advanced Member level 5
Joined
Jan 19, 2008
Messages
9,209
Helped
2,128
Reputation
4,250
Reaction score
1,955
Trophy points
1,393
Location
Toronto area of Canada
Activity points
57,849
The thick film resistor can dissipate 30W when its temperature is at its max of 150 degrees C or less and you cool its case to 25 degrees C somehow (liquid nitrogen?).
If you mount it on a heatsink in an air conditioned room then of course the heatsink will get warm or hot so you must reduce the power.
 
  • Like
Reactions: treez

    treez

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top