JRS2(3UA) thermal relay is suitable for A. C. 50Hz or 60 Hz, voltage up to 600-1000V, and current up to 630A, general AC motor of long or discontinuous long operation, this thermal overload relay is used as overload protection and has the functions of breaking phase protection, temperature compensation, and trip indication. It can automatically and passively get back. It can be fixed with contactor together, also be independently fixed.

We have all models of JRS2 thermal relay:
JRS2-12. 5/Z (3UA50)
JRS2-25/Z (3UA52)
JRS2-32/Z (3UA54)
JRS2-45/Z (3UA55)
JRS2-63/Z (3UA59)
JRS2-80/Z (3UA58)
JRS2-135 (3UA60)
JRS2-150 (3UA61)
JRS2-180 (3UA62)
JRS2-400/F (3UA66)
JRS2-630/F (3UA68)
And so on.

Types' meaning:
Z means " combined installation"
F means " independently installation"