Specifications are subject to change without notice
Information
LEESON MOTOR MODEL NUMBER
NOMENCLATURE
All LEESON motors, both stock and custom, have a catalog number
and a model number. The model number appears on the motor’s
nameplate and describes pertinent electrical and mechanical features
of the motor. An example follows along with a listing of the various
letters and positions used.
POSITION 1: U.L. PREFIX
A = Auto protector. U.L. recognized for locked rotor plus run, also
recognized construction (U.L. 1004)*.
M = Manual protector. U.L. recognized for locked rotor plus run, also
recognized construction (U.L. 1004)*.
L = Locked rotor protector (automatic). U.L. recognized for locked
rotor only, also recognized construction (U.L. 1004)*.
C = Component recognition. (U.L. 1004) No protector.
U = Auto protector. U.L. recognized construction (UL1004).
Motor/protector combination not UL recognized.
P = Manual protector. U.L. recognized construction (UL1004).
Motor/protector combination not UL recognized.
T = Thermostat, not U.L. recognized.
N = No overload protection.
*This applies only to 48, S56, and 56 frame designs through 1 HP, Open & TENV.
POSITION 2: (OPTIONAL)
This position is not always used.
M = Sub-Fractional HP Motors.
Z = BISSC Approved.
Other = Customer Code
POSITION 3: FRAME
4 = 48 Frame
23 = 23 Frame
40 = 40 Frame
6 = 56 Frame
30 = 30 Frame
43 = 43 Frame
42 = 42 Frame
34 = 34 Frame
44 = 44 Frame
143 = 143T Framei
36 = 36 Frame
53 = 53 Frame
145 = 145T Frame
38 = 38 Frame
65 = 65 Frame
182 = 182T Frame
39 = 39 Frame
184 = 184T Frame
213 = 213T Frame
215 = 215T Frame
254 = 254T Frame
256 = 256T Frame
284 = 284T Frame
286 = 286T Frame
324 = 324T Frame
326 = 326T Frame
364 = 364T Frame
365 = 365T Frame
404 = 404T Frame
405 = 405 T Frame
444 = 444T Frame
447 = 447T Frame
449 = 449T Frame
POSITION 4: MOTOR TYPE
C = Cap. Start/Ind. Run
T = Three Phase
D = Direct Current
B = Brushless DC
K = Cap. Start/Cap. Run H = Hysteresis Sync.
P = Permanent Split
R = Reluctance Sync.
S = Split Phase
Odd frequencies other than 50 Hz show synchronous speed code.
DC and special motors may have one, two, or three digits indicating
motor speed rounded to the nearest hundred RPM.
EXAMPLE:
Position No.
1 2 3 4 5 6 7 8 9 10
Sample Model No.
A B 4 C 17 D B 1 A (A-Z)
POSITION 5: RPM
RPM-Single Speed
RPM-Multi-Speed
34 = 3450 RPM 60 Hz 2 Pole
24 = 2 and 4 Poles
28 = 2850 RPM 50 Hz 2 Pole
26 = 2 and 6 Poles
17 = 1725 RPM 60 Hz 4 Pole
82 = 2 and 8 Poles
14 = 1425 RPM 50 Hz 4 Pole
212 = 2 and 12 Poles
11 = 1140 RPM 60 Hz 6 Pole
46 = 4 and 6 Poles
9 = 950 RPM 50 Hz 6 Pole
48 = 4 and 8 Poles
8 = 960 RPM 60 Hz 8 Pole
410 = 4 and 10 Poles
7 = 720 RPM 50 Hz 8 Pole
412 = 4 and 12 Poles
7 = 795 RPM 60 Hz 10 Pole
68 = 6 and 8 Poles
6 = 580 RPM 50 Hz 10 Pole
6 = 580 RPM 60 Hz 12 Pole
POSITION 6: ENCLOSURE
D = Drip-Proof
E = Explosion-Proof TENV
F = Fan Cooled
N = TENV
O = Open
S = Splashproof
W = Weatherproof, Severe Duty, Chemical Duty, WASHGUARD -
TEFC
X = Explosion-Proof TEFC
V = Weatherproof, Severe Duty, Chemical Duty, WASHGUARD -
TENV
POSITION 7: MOUNTING
B = Rigid base standard
C = “C” face - no base - NEMA
D = “D” flange - no base - NEMA
H = 48 frame - 56 frame mounting/shaft rigid
J = 48 frame - 56 frame mounting/shaft resilient
K = Rigid mount with “C” flange
L = Rigid mount with “D” flange
M = Motor parts - rotor and stator
R = Resilient base
S = Shell motor
T = Round body
Z = Special mounting
POSITION 8: SEQUENCE NUMBER
Number assigned as required when new designs with new
characteristics are needed.
POSITION 9: MODIFICATION LETTER
Major modification letter. Used when revisions made in existing
model
will
affect service parts.
POSITION 10: (OPTIONAL)
A date code consisting of either A-Z, and two digits 00-99.
Letter when shown on nameplate indicates model has U.L. primary
single phasing recognition. (Applies to 3 phase motors only.)
Code letters indicate manufacturing location:
A = Grafton, WI
B = Black River Falls, WI
C = Saukville, WI
E = Neillsville, WI
G = Lincoln, MO
P = West Plains, MO
GENERAL INFORMATION
