Choosing between these two industrial switching units is a question of control-circuit voltage and the kind of load you need to switch. One is a normally closed four-pole contactor with a DIN-rail mount, aimed at motor, lighting, and HVAC applications. The other is a reversing motor starter with overload protection and a 120V coil. Both live in the relays, contactors, and industrial switches category, but they solve different problems.
Quick verdict
Pick the Shopcorp 4 Pole 60A NC Contactor when the rest of your control scheme is low voltage and you need normally closed contacts for lighting, heating, or compressor duty. Pick the Allen-Bradley AB 100-C09\*10 reversing motor starter when you need forward/reverse control for a small motor and want the overload relay included.
At a glance
| Product | Listed price | Coil | Contact/function | Mount/package | Condition |
|---|---|---|---|---|---|
| Shopcorp 4 Pole 60A NC Contactor | $99.95 | 24V AC | 4-pole normally closed, motor/lighting/heating loads | DIN rail mount | New |
| AB 100-C09\*10 Reversing Motor Starter | $74.99 | 120V | Reversing starter with 1.6/5A overload relay | Includes connecting wire between contactors | Used |
Where each wins
Where the 4 Pole wins: The lower coil voltage, four normally closed poles, and DIN-rail base make it a clean fit for automated panels and HVAC equipment. It is also a new unit rather than a used one.
Where the AB starter wins: It combines reversing duty and overload protection in one package, and its $74.99 listed price sits $24.96 below the $99.95 four-pole unit.
Product notes
Shopcorp 4 Pole 60A NC Contactor
This is the unit to choose when your control circuit is low voltage. Its 24V AC coil and four normally closed poles make it a natural fit for lighting, resistance heating, and HVAC applications that need the contacts closed while the coil is off. The DIN-rail mounting base eases panel assembly, and the silent, no-humming coil keeps the cabinet quiet. The description lists AC-1 duty for furnaces, lamps, and heaters, as well as AC-3 duty for air conditioners, compressors, and fans. The trade-off is control-voltage flexibility: the 24V coil will not drop directly into a 120V control circuit, so it belongs in a panel designed around low-voltage switching. If your system already runs on 24V, this is a versatile switching block.
Allen-Bradley AB 100-C09\*10 Reversing Motor Starter
Here the priority is motor reversal. This starter is built around the 100-C09 contactor and includes the 1.6/5A overload relay, so you get forward/reverse control plus overload protection in the same package. The 120V coil fits conventional control transformers and existing push-button stations. It also comes with the connecting wire between the contactors, which reduces wiring guesswork during setup. The main limitation is that this is a used unit, so the coil and contacts should be inspected before installation, and the overload relay only covers motors in the 1.6 to 5 amp range. For a small reversing motor application with 120V control, this package is a direct match.
Final choice by use case
- Low-voltage control panels, lighting or heating loads, and HVAC compressor/condenser work: the Shopcorp 4 Pole 60A NC Contactor. The four normally closed poles line up with those applications.
- Small reversing motor with standard line-voltage control: the Allen-Bradley AB 100-C09\*10 reversing motor starter. It bundles the forward and reverse switching into one starter package.
