320-B1U12 
Product Information:
C3 Controls Thermal Overload 8.0 - 12.5 Amps - 320-B1U12 - C3 Controls For use on any of the following C3 Controls 300-M07, 300-M09, 300-M12, and 300-M16 mini contactors.
 
Product Alternates and Number Alterations:
NA
 
Specifications & Features:
Direct Mount to 300-S Contactors
IP20 Terminal Guards
Dual IEC and NEMA Terminal Markings
UL/cUL & CE Listed