TP-55A Fasco Fan Blower 3326758, 1FYA9

Manufacturer: Detroit Radiant Products
TP-55A - Fasco Fan Blower 

Used On Models: DTH(S)-2 40-100, DTH(S)-2 40-100, DTH(S)-2 40-100, DTH/S-2 125,150, DTH(S)-3 125, DTH(S)-3 150, HL, HL-2, HL2, HL3, DX, DX2, DX3, XTS, XTS3, DET, DET3, DES, DES3, LD, LS-40, LS-50, CL, CX, RVA, RVA2, AG1, AG2, RH

Same motor as TP55, higher efficiency, different wheel (Fergas type wheel). Use Motor TP-55 for DTH and DTH(S) Models with out the -2 or -3.
The TP-55 cannot substitute the TP-55A fan blower.