Start with the job, not the brand
When you're choosing between relays, contactors, and industrial switches, the first question is not brand - it's what the relay has to do. Do you need a simple DPDT power relay in an 8-pin socket, a 10A replacement for an existing industrial panel, or a dedicated under-voltage protection relay? The four relays here range from USD 12.90 to USD 375, and they differ in contact rating, coil voltage, form factor, and condition. The right pick depends on your cabinet's socket, your coil voltage, and how much margin you want on the contacts.
Quick take
- Line Electric MKP2A - used 5A DPDT 8-pin octal control relay, suited to vintage machinery maintenance.
- Struthers-Dunn 219BBXP-120VAC - new 10A DPDT relay with polycarbonate enclosure and quick-connect terminals.
- Power Relay 12A DPDT LY2NJ - new relay with socket, multiple coil choices, and the lowest listed price.
- GE 12NGV13B30A - new-open-box AC under-voltage relay, built for a specific protection role.
Listed-price comparison
| Product | Listed price | Price bar |
|---|---|---|
| Line Electric MKP2A 120VAC Control Relay 5A DPDT 8-Pin Octal Base Industrial Lot | USD 30.00 | |
| Struthers-Dunn 219BBXP-120VAC Industrial Relay DPDT 10A P198004 NEW | USD 267.99 | |
| Power Relay 12A DPDT Coil 12V 24V 110V 220V LY2NJ 8Pin Plug-in + Socket | USD 12.90 | |
| GENERAL ELECTRIC AC UNDER VOLTAGE RELAY, 12NGV13B30A, NGV13B30A (NEW - OTHER | USD 375.00 |
Decision matrix
| Consideration | Line Electric MKP2A | Struthers-Dunn 219BBXP | Power Relay 12A LY2NJ | GE NGV13B30A |
|---|---|---|---|---|
| Contact configuration | DPDT | DPDT | DPDT | Under voltage relay |
| Coil voltage | 120VAC | 120VAC | 12VDC / 24VDC / 110VAC / 220VAC | AC |
| Condition | Used | New | New | New - Open box |
| Best fit | Vintage and maintenance | Industrial replacement | Bench and control panel spares | Under-voltage protection |
Product notes
Line Electric MKP2A 120VAC Control Relay 5A DPDT 8-Pin Octal Base Industrial Lot
This used 8-pin relay is a practical fit for vintage machines and bench setups. The 120VAC coil and 5A DPDT contacts suit control circuits with modest current needs. The octal base and clear dust cover make it easy to swap into an older cabinet, and the DPDT wiring diagram printed on the casing helps with identification. Because it is a used unit, you should expect cosmetic wear. At USD 30.00, it sits between the low-priced LY2NJ relay and the new Struthers-Dunn in the price spread. The main limitation is the 5A contact rating: if your circuit needs more current, the 10A or 12A options in this guide are more appropriate.
Struthers-Dunn 219BBXP-120VAC Industrial Relay DPDT 10A P198004 NEW
At USD 267.99, this is the higher-priced general-purpose relay in the group, and it brings a clear polycarbonate enclosure plus a seismic-qualified integral hold-down clip. The DPDT contacts carry a 10A rating at 240VAC/28VDC, and the 120VAC coil is non-latching. Quick-connect terminals and socket-mounting make it a straightforward replacement in many industrial control panels. The unit is new, sold as excess/surplus industrial inventory, so you are getting an unused component rather than a used pull. The price is the main factor to weigh here; if your panel already uses this style of socket relay and you need a fresh spare, that higher price buys a specific form factor and enclosure.
Power Relay 12A DPDT Coil 12V 24V 110V 220V LY2NJ 8Pin Plug-in + Socket
The lowest listed price in this comparison, USD 12.90, makes this new 8-pin relay an easy spare to keep around. It includes a matching socket, and the coil can be selected from 12VDC, 24VDC, 110VAC, or 220VAC. Contacts are rated 0-12A with AC0-240V / DC0-28V, and the silver-alloy DPDT contacts provide 2NO+2NC switching. The LY2NJ/JQX-13F-2Z form factor is common in control panels, and the included socket simplifies wiring. There is also an indicator light and heavy-duty labeling. The trade-off is that this is a generic 8-pin plug-in design; if you need a manufacturer-specific replacement or a different socket form factor, this may not match your panel.
GENERAL ELECTRIC AC UNDER VOLTAGE RELAY, 12NGV13B30A, NGV13B30A (NEW - OTHER
The GE 12NGV13B30A is a different kind of component: an AC under-voltage relay rather than a general-purpose DPDT power relay. It is listed at USD 375.00, the highest price in the group, and it carries a new-open-box condition with a US origin. The under-voltage feature is the reason to select it; if your circuit needs to respond when AC mains voltage drops, this NGV-series relay is designed for that industrial protection job. The case shows one scratch and a minor chip, and the unit was not electrically tested, so treat it as an untested spare for a specific GE application rather than a daily-use relay. This is a targeted component for someone who knows exactly which function it must serve.
Final recommendation by use case
If you need a spare for a control panel that already uses an 8-pin LY2NJ-style relay, the Power Relay with socket is the most direct pick. For a machine rebuild where you want a new component with a 10A rating, the Struthers-Dunn 219BBXP is the stronger fit despite its higher listed price. The Line Electric MKP2A is the one to choose when you are maintaining older equipment that needs an octal-base relay. And if your application specifically calls for an AC under-voltage relay, the GE NGV13B30A is the targeted solution, though it carries the highest listed price and an untested condition.
