Sylvania TB113 Coil

Sylvania TB113 coil is a magnet coil used to energize the control windings of relays and contactors in 110–120 V AC circuits. The TB113 family includes variants such as TB113-1 and TB113-3, both specified for 110–120 V AC operation at 50/60 Hz, and listings show TB113-61 as another 110–120 V coil option for Clark/Joslyn/Sylvania equipment. In practice, these coils serve as the control element in industrial relays and contactors, energizing the armature to switch the load in electrical control panels, motor starters, and automation circuits. Compatibility notes from catalogs and retailer listings confirm use with older Clark/Joslyn contactors and related relay assemblies, with the prevailing specifications centering on 110–120 V AC operation and 50/60 Hz frequency. Some listings describe TB113 variants as new-old-stock (NOS) or vintage replacement parts, reflecting their use in legacy equipment.