When your control panel needs to switch a load, sense a position, or reverse a motor, the part you pick matters more than the brand name. Relays, contactors, and limit switches each do a different job, and the condition of the component can be just as important as the spec. The options here span a wide price range, so there's room to match both function and budget.
Quick Take
If you need a general-purpose relay with room to grow, the SQUARE D 8501 X080 is the low-priced pick. If you need a limit switch for position sensing, the Square D 9007-CO3 offers new-open-box condition at a mid price. For a reversing motor starter, the AB 100-C09\*10 bundles the overload relay. The AMS 4419 Rev G is a board-level repair part only.
Listed Price Comparison
| Product | Listed Price | Price Bar |
|---|---|---|
| SQUARE D 8501 X080 Relay | $27.99 | |
| AMS 4419 Rev G PCB Relay | $79.00 | |
| Square D 9007-CO3 Limit Switch | $52.89 | |
| AB 100-C09\*10 Reversing Contactor | $74.99 |
The listed prices cover a $51.01 spread from the lowest-priced to the highest-priced option.
Decision Matrix
- SQUARE D 8501 X080 - Go with this if you want a multi-pole relay with normally closed contacts and a 120V coil at the lowest listed price.
- AMS 4419 Rev G - Go with this only if you're sourcing a known PCB relay board for parts/repair and can accept untested condition.
- Square D 9007-CO3 - Go with this when you need mechanical snap-action position sensing and a new-open-box component.
- **AB 100-C09\*10** - Go with this when you need a reversing motor starter with overload relay in one used assembly.
Product Notes
SQUARE D 8501 X080 Industrial Control Relay 8NC 12P 10A Total 120/110V Coil
This heavy-duty NEMA relay gives you an 8-pole base that can expand to 12 poles, with all contacts normally closed. The 10A continuous rating and 600V AC maximum make it suited to industrial control panels, and the 110/120V coil means it can run on standard 120V control circuits. At $27.99, it's the lowest-priced option in this group by a clear margin. The trade-off is condition: it's pre-owned, fully functional, but likely to show scratches or scuffs from handling. If your panel doesn't require pristine cosmetics and you want a low-cost relay with room to grow poles, this is a practical buy.
AMS 4419 Rev G Industrial Control Relay PCB CN8-A 82350 V1.06
This listing is for a single circuit board, with three boards available, all sharing the same identifying numbers. The $79 price is higher than the other relay here, but you're buying a specific PCB assembly rather than a general-purpose relay. The catch is significant: these boards are used, untested, and sold AS-IS for parts or repair, with no guarantee of functionality or compatibility. That makes it a sourcing option for someone who recognizes the CN8-A 82350 V1.06 board and needs a donor or repair candidate, not a beginner-friendly drop-in relay. Cosmetic differences between photos and the actual board are likely, so keep your expectations aligned with the for-parts condition.
Square D 9007-CO3 Industrial Basic Snap Action Limit Switch 10A 600VAC
If your job is detecting position or travel rather than switching coils, this limit switch is the dedicated tool. It's new-open-box, with a DPDT-DB contact configuration (double pole double throw, double break) and a rating for 600VAC circuits. The brown housing with black plunger is a straightforward snap-action design, and the terminal range accepts AWG 22 to AWG 14 wire. It carries a commercial application label, so it fits machine guarding, conveyor interlocks, or similar control circuits. The limitation is that it's not a relay or contactor; you won't find a coil voltage here, and the switching function is triggered mechanically by the plunger. At $52.89, it sits mid-pack in price.
AB 100-C09\*10 Reversing motor starter Contactor 1.6/5A overload relay 120V Coil
This Allen Bradley unit bundles a reversing contactor with a 1.6/5A overload relay and a 120V coil, plus the connector wire that ties the contactors together. It's aimed squarely at reversing motor starter applications where you need forward/reverse control from a single assembly. The used condition is the trade-off, so this makes sense if you're comfortable sourcing used control gear. At $74.99, it's the second-highest listed price here, but the overload relay and interconnect wiring make it a more complete package than buying a bare contactor separately. If your motor starter project matches the 100-C09 frame and 120V control circuit, this is a strong candidate.
Final Recommendation by Use Case
- Pick the SQUARE D 8501 X080 for a low-cost, expandable relay with normally closed contacts.
- Pick the AMS 4419 Rev G only when you need a specific PCB relay board for parts or repair and can work with untested condition.
- Pick the Square D 9007-CO3 when a mechanical limit switch with new-open-box condition is the right fit.
- Pick the **AB 100-C09\*10** when you're assembling a reversing motor starter and want the overload relay and interconnect wire included.
