Maker Pro
Maker Pro

Help identify a resistor without bands

KilgoreCemetery

Apr 12, 2017
258
Joined
Apr 12, 2017
Messages
258
Could somebody please help me identify some specifics about this resistor? I know that it's 0.1 Ohms, but is it wirewound or metal oxide? Is it fire resistant or water proof? That sort of stuff.

If it helps, it's pulled from a Rockford Fosgate T8004 amplifier and was located just in front of the MOSFETs on the circuit board. I've looked for a schematic, but so far, no dice.
 

Attachments

  • 20171102_133531.jpg
    20171102_133531.jpg
    140.4 KB · Views: 189

Harald Kapp

Moderator
Moderator
Nov 17, 2011
12,615
Joined
Nov 17, 2011
Messages
12,615
Sounds reasonable. Power could be a tad less, impossible to say from the picture.
Although the thick coating doesn't allow to see the structure typical for wire wound resistors.
Most likely neither fire proof nor water resistant

The letter 'J' likewise indicates a tolerance of +-5%.

Probably any resistor of similar size and value will suit for replacement, if necessary.
 

dorke

Jun 20, 2015
2,342
Joined
Jun 20, 2015
Messages
2,342
Most probably a Flame-proof/Flame-resistant resistor.
A "safety part" common in high wattage/current amps.
Should not catch fire when current exceeds high value on fault conditions.
Wattage depends on size(?),could be 3W.
Like this one
Any other writing on it?

Don't replace it with a "regular" resistor,it is a safety part!!!
Noname.jpg
 

KilgoreCemetery

Apr 12, 2017
258
Joined
Apr 12, 2017
Messages
258
Ah, I wondered if it was going to have some safety specs with it. The replacement I ordered was listed as "Flame Retardant Coating, Safety". It's a 3W and very similar in size to the original. Hopefully that covers it :eek:

No other writing. Just the same thing printed three different times
 

73's de Edd

Aug 21, 2015
3,368
Joined
Aug 21, 2015
Messages
3,368
I'll go for metal film element construction and stay at 2-3 Watt until you put in a side by side dime for size comparison . . . .or a penny . . . . if you are presently being hard up .
 

KilgoreCemetery

Apr 12, 2017
258
Joined
Apr 12, 2017
Messages
258
I'm definitely hard up, but my calipers are paid off. I'm getting about 15mm x 5.5mm, not including the leads
 

bushtech

Sep 13, 2016
1,025
Joined
Sep 13, 2016
Messages
1,025
Apologies for chipping in: If you need say a 2W resistor and you can only find a 3W version, is that OK to use?
 

73's de Edd

Aug 21, 2015
3,368
Joined
Aug 21, 2015
Messages
3,368
NOW . . . . . . how about REALLY breaking that serial info down and actually coming out with . . . . . .
3W for 3 watts
R for being the position of a decimal place
Then that collectively becomes decimal 27 ohms
.27 ohms
And then the final K relates its 10% tolerance.
All of that is then amalgamated as being a 3 watt .27 ohm 10% tolerance resistor.
 

Victor james

Jul 28, 2018
1
Joined
Jul 28, 2018
Messages
1
Does anybody know what make that resistor is and where do you buy them I have the same problem
 
Top