Thermal Fuse

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jroper

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I am trying to repair an issue on a fan unit in a server rack. The fan motors thermal fuse is the known issue (currently bypassed & working).

The thermal fuses data is:
250v~LH / 2.8A / 130c / <ps>E/JET

I am finding similar replacements but not exact matches. The closest seems to be
250v~RH / 3A / 130c

Can someone tell me the specific difference between the RH and LH versions?
Also, any idea why a cooling fan would have a thermal fuse in this application? It seems counterproductive.

JR
 
Right Hand and Left Hand. When there are two thermal fuses, it apparently makes a difference which one is right and left for sone reason.

Generally the important aspect is the thermal rating, in this case 130deg. The intent is s to cut off power if the temperature exceeds the thermal rating. Most likely it cuts power to the device that generates heat, not to the fan.
 
From this website:

Thermal Fuse-RH supplier,China Thermal Fuse,Temperature Sensor manufacturer & supplier

Thermal Fuse products – Buy China Thermal Fuse,Temperature Sensor products,welcome contact us now at the website http://www.thermal-sensor.com of Mingjia Electric co., Ltd.
www.thermal-sensor.com www.thermal-sensor.com

I see:

RH

Thermal Fuse​

Our RH type uses a fusible alloy inside a ceramic case. It has a cutoff (rated) current. Because of its insulated case, the RH type can be attached directly where temperature detection is required.
 
Frank DuVal said:
From this website:

Thermal Fuse-RH supplier,China Thermal Fuse,Temperature Sensor manufacturer & supplier

Thermal Fuse products – Buy China Thermal Fuse,Temperature Sensor products,welcome contact us now at the website http://www.thermal-sensor.com of Mingjia Electric co., Ltd.
www.thermal-sensor.com www.thermal-sensor.com

I see:

RH

Thermal Fuse​

Our RH type uses a fusible alloy inside a ceramic case. It has a cutoff (rated) current. Because of its insulated case, the RH type can be attached directly where temperature detection is required.
Click to expand...
Yeah, I have almost zero trust in anything written by Chinese suppliers who are likely translating something they copied from someone else without knowing what it means.
 
Frank DuVal said:
From this website:

Thermal Fuse-RH supplier,China Thermal Fuse,Temperature Sensor manufacturer & supplier

Thermal Fuse products – Buy China Thermal Fuse,Temperature Sensor products,welcome contact us now at the website http://www.thermal-sensor.com of Mingjia Electric co., Ltd.
www.thermal-sensor.com www.thermal-sensor.com

I see:

RH

Thermal Fuse​

Our RH type uses a fusible alloy inside a ceramic case. It has a cutoff (rated) current. Because of its insulated case, the RH type can be attached directly where temperature detection is required.
Click to expand...
I did see this in my research. I did not see anything for LH which is what mine is. Thus the inquiry here. But thanks for the response
 
Jraef said:
Still does not explain WHY there would be a difference though.
Click to expand...
Those instructions show only a single part number for both fuse link kits. They have different installation steps depending on which side the link is on.
 
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