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Included: the motor with its lead; lead length per model is in the Models table.
Pump end required, ordered separately: a Baker pump end of the same horsepower with a NEMA 4 in motor bracket.
Motor control: Two-wire motors need no control box (the controls are in the motor); single-phase three-wire motors need a control box; three-phase motors need a starter kit or drive.
Drop cable and splice kit: sized to your setting depth and ordered separately.
Baker’s 4 in asynchronous two-pole submersible motors run from 1/2 to 10 HP. A mixture of water and glycol cools and lubricates the thrust bearing assembly. Two-wire motors carry the capacitor in a Noryl cartridge connected directly to the motor, so they need no external control box; three-wire motors need a control box (single-phase) or starter (three-phase).
Every part that touches water is stainless steel: AISI 304 on two-wire motors and AISI 316 on three-wire and three-phase motors. The squirrel-cage rotor sits on a self-centering Kingsbury-type thrust bearing, and the stator is sealed in an airtight stainless steel can.
Covered for 3 years from the date of manufacture under A.Y. McDonald’s published terms for Baker submersible motors. The terms add a 5-year term from the date of manufacture for Baker submersible motors, including assembled pumps with pump ends up to 25 GPM, in potable water applications.
One motor per pump end, matched by horsepower. Need more head or flow later? Pair a larger pump end with the matching larger motor: Baker 4 in motors run from 1/2 to 10 HP in this listing, all on the same NEMA 4 in flange.
| Model | Part No. | HP | Power | kW | Service Factor | Rated Amps | SF Amps | Downward Thrust | Lead | Length | Weight |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SM0412 0.5HP115V | 3132-008 | 1/2 | 115V 1Ph 2-Wire | 0.37 | 1.6 | 8.6 A | 10 A | 500 lbf | 5 1/2 ft | 13.4 in | 21.4 lb |
| SM0412 0.5HP230V | 3132-005 | 1/2 | 230V 1Ph 2-Wire | 0.37 | 1.6 | 4 A | 4.8 A | 450 lbf | 5 1/2 ft | 14.1 in | 23.6 lb |
| SM0413 0.5HP115V | 3132-003 | 1/2 | 115V 1Ph 3-Wire | 0.37 | 1.6 | 11.3 A | 14.6 A | 450 lbf | 5 1/2 ft | 11 in | 18.5 lb |
| SM0413 0.5HP230V | 3132-004 | 1/2 | 230V 1Ph 3-Wire | 0.37 | 1.6 | 5.5 A | 6.6 A | 500 lbf | 5 1/2 ft | 11 in | 18.5 lb |
| SM0433 0.5HP230V | 3132-525 | 1/2 | 230V 3Ph | 0.37 | 1.6 | 3.6 A | 3.7 A | 500 lbf | 5 1/2 ft | 9.3 in | 16.3 lb |
| SM0433 0.5HP460V | 3132-526 | 1/2 | 460V 3Ph | 0.37 | 1.6 | 1.6 A | 1.9 A | 500 lbf | 5 1/2 ft | 9.3 in | 16.3 lb |
| SM0412 0.75HP230V | 3132-006 | 3/4 | 230V 1Ph 2-Wire | 0.55 | 1.5 | 6.3 A | 6.9 A | 500 lbf | 5 1/2 ft | 13.8 in | 23.2 lb |
| SM0413 0.75HP230V | 3132-000 | 3/4 | 230V 1Ph 3-Wire | 0.55 | 1.5 | 7.4 A | 8.6 A | 500 lbf | 5 1/2 ft | 11.3 in | 21.4 lb |
| SM0433 0.75HP230V | 3132-527 | 3/4 | 230V 3Ph | 0.55 | 1.5 | 4.6 A | 4.9 A | 500 lbf | 5 1/2 ft | 10.5 in | 19.4 lb |
| SM0433 0.75HP460V | 3132-528 | 3/4 | 460V 3Ph | 0.55 | 1.5 | 2.2 A | 2.4 A | 500 lbf | 5 1/2 ft | 10.5 in | 19.4 lb |
| SM0412 1HP230V | 3132-007 | 1 | 230V 1Ph 2-Wire | 0.75 | 1.4 | 7.7 A | 8.8 A | 700 lbf | 5 1/2 ft | 16.8 in | 28.9 lb |
| SM0413 1HP230V | 3132-001 | 1 | 230V 1Ph 3-Wire | 0.75 | 1.4 | 8.3 A | 9.8 A | 700 lbf | 5 1/2 ft | 13.6 in | 27.8 lb |
| SM0433 1HP230V | 3132-529 | 1 | 230V 3Ph | 0.75 | 1.4 | 4.7 A | 5.2 A | 500 lbf | 5 1/2 ft | 11.3 in | 21.4 lb |
| SM0433 1HP460V | 3132-530 | 1 | 460V 3Ph | 0.75 | 1.4 | 2.6 A | 2.8 A | 500 lbf | 5 1/2 ft | 11.3 in | 21.4 lb |
| SM0412 1.5HP230V | 3132-009 | 1 1/2 | 230V 1Ph 2-Wire | 1.1 | 1.3 | 10.6 A | 12.1 A | 700 lbf | 5 1/2 ft | 18.5 in | 33.3 lb |
| SM0413 1.5HP230V | 3132-002 | 1 1/2 | 230V 1Ph 3-Wire | 1.1 | 1.3 | 10.1 A | 11.5 A | 700 lbf | 5 1/2 ft | 16.2 in | 32.5 lb |
| SM0433 1.5HP230V | 3132-531 | 1 1/2 | 230V 3Ph | 1.1 | 1.3 | 8.1 A | 8.5 A | 700 lbf | 5 1/2 ft | 13.6 in | 25.8 lb |
| SM0433 1.5HP460V | 3132-532 | 1 1/2 | 460V 3Ph | 1.1 | 1.3 | 3.6 A | 3.9 A | 700 lbf | 5 1/2 ft | 13.6 in | 25.8 lb |
| SM0433 1.5HP575V | 3132-533 | 1 1/2 | 575V 3Ph | 1.1 | 1.3 | 2.9 A | — | 700 lbf | 5 1/2 ft | 13.6 in | 25.8 lb |
| SM0413 2HP230V | 3132-510 | 2 | 230V 1Ph 3-Wire | 1.5 | 1.25 | 10.6 A | 13.0 A | 700 lbf | 5 1/2 ft | 16.2 in | 32.7 lb |
| SM0433 2HP230V | 3132-534 | 2 | 230V 3Ph | 1.5 | 1.15 | 10.2 A | 10.8 A | 700 lbf | 5 1/2 ft | 15.4 in | 30.5 lb |
| SM0433 2HP460V | 3132-535 | 2 | 460V 3Ph | 1.5 | 1.15 | 4.6 A | 4.9 A | 700 lbf | 5 1/2 ft | 15.4 in | 30.5 lb |
| SM0433 2HP575V | 3132-536 | 2 | 575V 3Ph | 1.5 | 1.15 | 3.7 A | — | 700 lbf | 5 1/2 ft | 15.4 in | 30.5 lb |
| SM0413 3HP230V | 3132-512 | 3 | 230V 1Ph 3-Wire | 2.2 | 1.15 | 14.3 A | 16.2 A | 1500 lbf | 5 1/2 ft | 21.4 in | 45.2 lb |
| SM0433 3HP230V | 3132-514 | 3 | 230V 3Ph | 2.2 | 1.15 | 10.7 A | 11.6 A | 1500 lbf | 5 1/2 ft | 19.8 in | 40.8 lb |
| SM0433 3HP460V | 3132-515 | 3 | 460V 3Ph | 2.2 | 1.15 | 5.6 A | 6.0 A | 1500 lbf | 5 1/2 ft | 19.8 in | 40.8 lb |
| SM0433 3HP575V | 3132-516 | 3 | 575V 3Ph | 2.2 | 1.15 | 5.8 A | — | 1500 lbf | 5 1/2 ft | 19.8 in | 40.8 lb |
| SM0413 5HP230V | 3132-513 | 5 | 230V 1Ph 3-Wire | 3.7 | 1.15 | 22.2 A | 24.3 A | 1500 lbf | 8 3/4 ft | 26.9 in | 59.8 lb |
| SM0433 5HP230V | 3132-517 | 5 | 230V 3Ph | 4 | 1.15 | 20.4 A | 21.6 A | 1500 lbf | 8 3/4 ft | 24.2 in | 51.9 lb |
| SM0433 5HP460V | 3132-518 | 5 | 460V 3Ph | 4 | 1.15 | 8.9 A | 9.6 A | 1500 lbf | 8 3/4 ft | 24.2 in | 51.9 lb |
| SM0433 5HP575V | 3132-519 | 5 | 575V 3Ph | 4 | 1.15 | 7.1 A | — | 1500 lbf | 8 3/4 ft | 24.2 in | 51.9 lb |
| SM0433 7.5HP230V | 3132-520 | 7 1/2 | 230V 3Ph | 5.5 | 1.15 | 25.7 A | 27.5 A | 1500 lbf | 8 3/4 ft | 26.9 in | 59.8 lb |
| SM0433 7.5HP460V | 3132-521 | 7 1/2 | 460V 3Ph | 5.5 | 1.15 | 12 A | 13.0 A | 1500 lbf | 8 3/4 ft | 26.9 in | 59.8 lb |
| SM0433 7.5HP575V | 3132-522 | 7 1/2 | 575V 3Ph | 5.5 | 1.15 | 9.6 A | — | 1500 lbf | 8 3/4 ft | 26.9 in | 59.8 lb |
| SM0433 10HP460V | 3132-523 | 10 | 460V 3Ph | 7.5 | 1.15 | 15.4 A | 16.9 A | 1500 lbf | 11 1/2 ft | 30.1 in | 68.7 lb |
| SM0433 10HP575V | 3132-524 | 10 | 575V 3Ph | 7.5 | 1.15 | 12.3 A | — | 1500 lbf | 11 1/2 ft | 30.1 in | 68.7 lb |
Electrical, thrust and lead figures from the catalog motor tables; length and weight from the catalog dimension tables by horsepower. — where the catalog prints no figure. Sources: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 121-128; Baker Pumps and Accessories price list, effective 7/1/2026.
| Included | Motor with lead |
| Flange | NEMA 4 in |
| Insulation class | F |
| Degree of protection | IP68 |
| Cooling flow past the motor | 1.0 ft/sec at 95°F |
| Voltage tolerance | +6% / -10% |
| Maximum starts | 20 per hour |
| Maximum operating depth | 984 ft |
| Water temperature rating | 95°F |
| Speed | Two-pole, about 3450 RPM at 60 Hz |
| Certification | CSA |
| Frequency | 60 Hz |
| App connection | None |
Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 121-128.
A submersible motor is sized to the pump end: the same horsepower, the same flange, and enough downward thrust capacity for the pump. The figures below are the catalog electrical data, for sizing the breaker, starter or drive and the drop cable.
| HP | Power | Efficiency (%) | Power Factor | Locked Rotor / Rated Amps | Lead Conductors |
|---|---|---|---|---|---|
| 1/2 | 115V 1Ph 2-Wire | 46 | 0.88 | 4.2 | 3x14 |
| 1/2 | 230V 1Ph 2-Wire | 54 | 0.97 | 4.4 | 3x14 |
| 1/2 | 115V 1Ph 3-Wire | 54 | 0.80 | 4.2 | 4x14 |
| 1/2 | 230V 1Ph 3-Wire | 54 | 0.78 | 4.6 | 4x14 |
| 1/2 | 230V 3Ph | 42 | 0.40 | 4.4 | 4x14 |
| 1/2 | 460V 3Ph | 42 | 0.40 | 5.0 | 4x14 |
| 3/4 | 230V 1Ph 2-Wire | 47 | 0.82 | 4.3 | 3x14 |
| 3/4 | 230V 1Ph 3-Wire | 56 | 0.80 | 4.0 | 4x14 |
| 3/4 | 230V 3Ph | 48 | 0.47 | 5.2 | 4x14 |
| 3/4 | 460V 3Ph | 48 | 0.47 | 5.5 | 4x14 |
| 1 | 230V 1Ph 2-Wire | 50 | 0.84 | 4.8 | 3x14 |
| 1 | 230V 1Ph 3-Wire | 62 | 0.80 | 4.9 | 4x14 |
| 1 | 230V 3Ph | 59 | 0.59 | 6.4 | 4x14 |
| 1 | 460V 3Ph | 59 | 0.59 | 5.8 | 4x14 |
| 1 1/2 | 230V 1Ph 2-Wire | 53 | 0.85 | 4.7 | 3x14 |
| 1 1/2 | 230V 1Ph 3-Wire | 67 | 0.88 | 4.6 | 4x14 |
| 1 1/2 | 230V 3Ph | 60 | 0.53 | 5.9 | 4x14 |
| 1 1/2 | 460V 3Ph | 60 | 0.53 | 6.7 | 4x14 |
| 1 1/2 | 575V 3Ph | — | — | — | — |
| 2 | 230V 1Ph 3-Wire | 70 | 0.95 | 5.4 | 4x14 |
| 2 | 230V 3Ph | 67 | 0.57 | 6.1 | 4x14 |
| 2 | 460V 3Ph | 67 | 0.57 | 6.7 | 4x14 |
| 2 | 575V 3Ph | — | — | — | — |
| 3 | 230V 1Ph 3-Wire | 71 | 0.94 | 3.6 | 4x14 |
| 3 | 230V 3Ph | 71 | 0.69 | 7.5 | 4x14 |
| 3 | 460V 3Ph | 71 | 0.69 | 7.1 | 4x14 |
| 3 | 575V 3Ph | — | — | — | — |
| 5 | 230V 1Ph 3-Wire | 76 | 0.98 | 3.3 | 4x14 |
| 5 | 230V 3Ph | 77 | 0.70 | 7.4 | 4x14 |
| 5 | 460V 3Ph | 77 | 0.70 | 7.4 | 4x14 |
| 5 | 575V 3Ph | — | — | — | — |
| 7 1/2 | 230V 3Ph | 78 | 0.71 | 7.5 | 4x14 |
| 7 1/2 | 460V 3Ph | 78 | 0.71 | 7.5 | 4x14 |
| 7 1/2 | 575V 3Ph | — | — | — | — |
| 10 | 460V 3Ph | 80 | 0.78 | 7.1 | 4x14 |
| 10 | 575V 3Ph | — | — | — | — |
Electrical data at 60 Hz as printed. Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 121-128.
| Well size | Built for 4 in diameter or larger water wells |
| Cooling | 1.0 ft/sec at 95°F of water flow past the motor |
| Water temperature | Rated to 95°F |
| Starts | 20 per hour |
| Setting depth | Up to 984 ft operating depth |
| Control | Two-wire motors need no control box (the controls are in the motor); single-phase three-wire motors need a control box; three-phase motors need a starter kit or drive |
| Voltage | Match voltage and phase to your service; tolerance +6% / -10% |
| Application | Water wells; the manufacturer excludes use in swimming areas |
Two-wire motors
| Inner and outer sleeve | AISI 304 |
| Stator | AISI 304L |
| Shaft | AISI 304 |
| Upper and lower bracket | Cast iron |
| Bracket cover | AISI 304 |
| Lip seal and gasket | NBR |
| Diaphragm | EPDM |
| Thrust bearing | Stainless steel and graphite |
| Capacitor | Internal |
| Cable | EPDM |
| Connecting plug | AISI 316 |
| Sand guard | NBR, fixed-removable |
| Bolts and screws | AISI 304 |
| Cooling liquid | Glycol and water |
Three-wire and three-phase motors
| Inner and outer sleeve | AISI 316 |
| Stator | AISI 316L / Duplex |
| Shaft end | AISI 316 |
| Upper and lower bracket | Cast iron |
| Bracket cover | AISI 316 |
| Lip seal and gasket | NBR |
| Diaphragm | EPDM |
| Thrust bearing | Stainless steel and graphite |
| Valve | AISI 303 |
| Cable | EPDM |
| Connecting plug | AISI 316 |
| Sand guard | NBR, fixed-removable |
| Bolts and screws | AISI 316 |
| Cooling liquid | Glycol and water |
Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 124 and 126.
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