1n4007 is getting hot

[8bit_brain]

I purchased 100x 1N4007 from Amazon. I observed that they are smaller than the ones I used to use.
Today I observed that at 0.8A they are getting very warm (almost hot). At 1A I cannot keep my finger on them. Is this normal?

(No documentation was provided by the seller).

 

[Alec_t]

At 1A the rated Vf is about 0.9V, so the dissipation is 0.9W. Expect the diode to get uncomfortably hot.

 

[(*steve*)]

Can you post a photo of them with a ruler or something beside them for scale.

Also, if you can measure the voltage drop across them at some known current, it would help confirm what's been said earlier.

 

[Audioguru]

If the diodes are smaller than normal then they are fakes.

 

[(*steve*)]

Well, if you're expecting something the size of a 1N5404, then smaller is ok. If it's smaller than a 1N4001, then yeah, that's a strong possibility.