What the 40 A rating means on this relay
The G7Z-4A-20Z-R DC24V: The main NO contacts are rated 40 A resistive at 440 VAC, which means this relay can switch motor loads and heaters directly in a panel without needing an intermediate contactor for moderate currents. The inductive rating drops to 22 A at the same voltage — that's the real-world ceiling for motor or solenoid loads, and the number to use for sizing in a pump or conveyor circuit. Auxiliary contact block adds DPST-NO with 1 A max switching — enough to signal a PLC input or latch a holding circuit, but not for power. The minimum load on the main contacts is 2 A at 24 VDC; below that, the silver alloy may not wet reliably, so don't use this for dry-signal switching. The auxiliary block handles down to 1 mA at 5 VDC, which does cover low-level logic feedback.
Terminal hardware and panel fit
Coil terminals are M3.5 screws; main contact terminals are M5.0 — these are substantial lugs for 40 A wiring, and the M5 size means you're landing 8 AWG or similar without a crimp ring if the terminal accepts bare wire. The auxiliary block uses M3.5 screws, matching typical control wiring. All screw terminals, so no special crimp tool needed on site. Power consumption is about 3.7 W for the coil — factor that into the panel thermal budget if you're packing multiple relays in a sealed enclosure.
Lifecycle and sourcing for this G7Z relay
RoHS compliant per the listing.