Industrial relays are easy to overlook until your control panel needs a coil voltage, contact rating, and terminal style that all line up. If you're looking for a DPDT (double-pole, double-throw) relay, the choices range from a compact socket-mounted unit with multiple coil voltages to a heavy-duty 120VAC control relay in a clear polycarbonate enclosure. The key is matching the relay to your actual wiring and load, not just picking the cheapest or the most expensive.
The quick take: the Struthers-Dunn 219BBXP-120VAC is the heavy-duty option for 120VAC control circuits with 10A contacts and quick-connect terminals. The Line Electric MKP2A is a vintage-style octal-base relay for 5A loads. The Power Relay with socket can be ordered in 12VDC, 24VDC, 110VAC, or 220VAC coil versions and comes with an 8-pin plug-in socket. The A&B Industrial relay offers screw terminals and bifurcated gold-plated contacts for wiring that needs a secure, low-level contact.
Listed Price Comparison
| Product | Listed Price | Price Bar | Key Specs |
|---|---|---|---|
| Struthers-Dunn 219BBXP-120VAC | USD 267.99 | DPDT, 10A, 120VAC coil, quick-connect terminals | |
| Line Electric MKP2A 120VAC Control Relay | USD 30.00 | DPDT, 5A, 120VAC coil, 8-pin octal base | |
| Power Relay 12A DPDT Coil 12V 24V 110V 220V LY2NJ 8Pin Plug-in + Socket | USD 12.90 | DPDT, 12A, selectable coil, 8-pin plug-in, socket included | |
| A&B Industrial Relay 24V50/60Hz | USD 43.98 | Screw terminals, bifurcated gold-plated contacts, 24V 50/60Hz coil |
How to Match a Relay to Your Setup
| Use Case | Strong Match | Why |
|---|---|---|
| Heavy 120VAC control circuit | Struthers-Dunn 219BBXP-120VAC | 10A DPDT contacts, quick-connect terminals, polycarbonate enclosure |
| Vintage or octal-base panel | Line Electric MKP2A | Standard 8-pin octal base, 5A contacts, 120VAC coil |
| Multiple coil voltages with socket | Power Relay LY2NJ 8Pin | 12VDC, 24VDC, 110VAC, or 220VAC coil choice and included socket |
| 24VAC screw-terminal wiring | A&B Industrial Relay | Screw terminals, bifurcated gold-plated contacts, 24V 50/60Hz coil |
Relay-by-Relay Breakdown
Struthers-Dunn 219BBXP-120VAC Industrial Relay DPDT 10A P198004 NEW
This Struthers-Dunn industrial relay is the highest-priced option in the group, and it targets 120VAC control circuits with a 10A contact rating. It is DPDT with silver alloy contacts, and the clear polycarbonate enclosure plus the integral hold-down clip make it a substantial panel component. The socket-mount design uses quick-connect terminals, so you can wire it into a fixed location rather than plugging it into a separate socket. Choose it when you need a heavy-duty 120VAC relay with a robust enclosure. The limitation is that it is a 120VAC-only coil, so it won't cover 12V or 24V coil requirements.
Line Electric MKP2A 120VAC Control Relay 5A DPDT 8-Pin Octal Base Industrial Lot
The Line Electric MKP2A is a used control relay with a 120VAC coil and a 5A continuous contact rating. Its standard 8-pin octal base and clear protective dust cover point to classic industrial panel layouts, making it a practical choice when you are maintaining older machinery or keeping spare octal-base relays around. It sits well below the top-priced industrial relay in this comparison. The trade-off is that it is used and rated for only 5A, so it is not the right relay for a circuit needing 10A or higher. If your application fits a 120VAC coil and octal-base wiring, this is the most straightforward match in the group.
Power Relay 12A DPDT Coil 12V 24V 110V 220V LY2NJ 8Pin Plug-in + Socket
This is the only relay here that comes with a socket and gives you a choice of coil voltages: 12VDC, 24VDC, 110VAC, or 220VAC. It is an 8-pin plug-in DPDT relay with a 12A contact capacity, silver alloy contacts, and a stated pick-up time of ≤15ms. For panel builders who need to keep a few coil-voltage variants on hand, the included socket makes replacement straightforward, and the listed price is the lowest in this comparison. The limitation is more about fit than anything else: the coil voltage is selected when you order, so you need to pick the right version for your circuit before it arrives.
A&B Industrial Relay 24V50/60Hz Elec Cl Screw Terminals Bifurcated Gold Pltd
The A&B industrial relay is the one to consider if your wiring runs to screw terminals instead of blade or plug-in connections. It has a 24V 50/60Hz coil, screw terminals, and bifurcated gold-plated contacts, which are often preferred for low-level signal switching. It is listed as new open box, putting it in the middle of the price range. The main limitation is the coil voltage: it only accepts 24V AC, so it won't work in a 120VAC control circuit without additional conversion. For a 24VAC panel, this relay's terminal style is the clear advantage.
Final Recommendation by Use Case
Choose the Struthers-Dunn 219BBXP-120VAC if you need a 10A industrial relay for a 120VAC control circuit and prefer quick-connect terminals. Pick the Line Electric MKP2A for a used but functional octal-base relay. The Power Relay with socket is the flexible option when you need a 12A relay in 12 or 24VDC or 110/220VAC. And the A&B industrial relay is the match if 24VAC and screw terminals are your priority.
