Help identify a resistor without bands

[KilgoreCemetery]

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.

 

[kellys_eye]

Wire wound, 5W would be my guess.

Any offers?

 

[Harald Kapp]

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.

 

[KilgoreCemetery]

I knew the J stood for something, but I couldn't for the life of me remember what. Thanks, Harald!

Wire wound, 5W would be my guess.

Any offers?

Thanks for the info, Kelly! What do you mean by offers?

 

[kellys_eye]

What do you mean by offers

Difference of opinion..... Harald's offer was a good one - I'd 'take it'.

 

[dorke]

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!!!

 

[KilgoreCemetery]

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

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

 

[73's de Edd]

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]

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

 

[73's de Edd]

In that case . . . . . make it 2 watt.

 

[bushtech]

Apologies for chipping in: If you need say a 2W resistor and you can only find a 3W version, is that OK to use?

 

[dorke]

@bushtech
Yes, generally it is.

Except when the resistor is used as a fuse in the circuit,in this case use only the same wattage.
Such as fusible resistors.

 

[bushtech]

Great! Thanks dorke.

 

[KilgoreCemetery]

Thanks for the help guys!

 

[KilgoreCemetery]

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

I was referencing this post when I realized that your reply included a link to a page that goes into more detail about resistor Letter and Digit Codes. Very helpful! I almost confused a 3WR27ΩK as 27 kilo ohm, instead of 27 ohm with ±10%

 

[73's de Edd]

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]

Does anybody know what make that resistor is and where do you buy them I have the same problem

 

[73's de Edd]

https://www.mouser.com/ProductDetai...=sGAEpiMZZMu61qfTUdNhGwBiNiGBqN/zQZf/sz92Uz8=