Square D 10 HP 1-Phase Definite Purpose Starter #IAT-8911DPSG52V09
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| Part Number | 8911DPSG52V09 |
| CAS Part Number | IAT-8911DPSG52V09 |
| Product Type | Definite purpose magnetic motor starter |
| Starter Action | Non-reversing |
| Motor Rating | 10 HP at 230V single phase (3 HP at 115V) |
| Full-Load Current Rating | 50 A |
| Poles | 2 |
| Coil Voltage | 208–240V AC, 50/60 Hz |
| Enclosure | NEMA 1 |
| Overload Type | Melting alloy (Type B thermal unit) |
| Brand | Square D by Schneider Electric |
Square D 10 HP 1-Phase Definite Purpose Starter #8911DPSG52V09
Square D Class 8911 definite-purpose starters are the workhorse magnetic starters behind single-phase motor loads — air compressors, pumps, and HVAC equipment. #8911DPSG52V09 (supplied through Compressed Air Systems as IAT-8911DPSG52V09) is the enclosed 50-amp, 2-pole, single-phase, non-reversing version with a 208–240V AC control coil in a NEMA 1 enclosure.
Schneider Electric rates it for up to 10 HP at 230V single phase (3 HP at 115V), with a 600V AC maximum system voltage. Its melting-alloy overload takes one Type B thermal unit sized to the connected motor's nameplate full-load current — the heater is what protects the motor, so it is selected by amps, never by horsepower alone.
Questions before ordering? Call (817) 865-3707 with your motor's nameplate — we confirm the starter and thermal unit match before you order.
Compatibility & Fitment
Before replacing a motor starter, confirm the motor horsepower, supply voltage, phase, full-load amps, control-coil voltage, and enclosure requirement. This unit is single-phase, non-reversing — use it where those requirements match.
The base starter requires a compatible Type B thermal unit. If your package includes one, verify the heater's amp range against the motor's nameplate full-load current before installation — thermal-unit sizing is based on the motor, not the horsepower rating.
Frequently Asked Questions
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