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Omron Relays: G2R/G6B Interface, G3NA/G3PE Solid-State, G7SA Safety

Panel relays fall into three jobs. Interface relays (G2R plug-in with P2RF sockets, G6B slim signal relays) switch logic-level loads between a PLC output and the field device — 5 A class contact ratings, millions of mechanical operations. Solid-state relays (G3NA, G3PE) switch without contacts for high cycle rates, silent operation and resistive/heater loads where contact wear would dominate maintenance. Safety relays (G7SA, also filed under Safety) use force-guided contacts so a welded contact can be detected.

Selection is mostly about the load, not the coil. Confirm the switched voltage and current (resistive vs inductive vs lamp inrush), the required contact arrangement (SPDT, DPDT, 4PDT), coil voltage (24 VDC dominates new panels), and mounting — PCB, DIN socket, or slim terminal block. For heater and lamp circuits above a few amps at high duty, an SSR outlives a mechanical relay by an order of magnitude; for mixed and small loads, the G2R remains the default.

We stock the relay, the matching socket, hold-down clips and markers together — the most common cause of panel delays is a relay arriving without its socket. High-frequency and RF signal relays (the G6K/G6W families) are a different, signal-level product line: if you need RF switching, contact us with the frequency and load and we will confirm availability.

Popular Series and Buying Notes

Omron Solid State Relays Omron Interface Relays Omron DRT2 Smart DeviceNet I/O Units

Featured Product Guides

G3NA-D210B-UTU specifications and selection notes
  • Use exact SKU matching for replacements, especially when terminal type and communication suffixes differ.
  • For relays projects, sharing machine model, load profile, and installation environment helps us recommend the right variant faster.
  • Ask for quotation with quantity tiers to compare unit pricing and lead-time options in one response.

50 products available in this category.

Browse All 12 SKUs in relays
G3NA-450B-UTU-2 DC5-24V G3NA-D210B-UTU G3NA-D210B-UTU DC5-24 G3NB-210B-1 G3NB-225B-1 G3NB-240B-1 DC5-24V G3PA-220B-VD-X DC5-24V G3PE-225B DC12-24V G3PE-225BL DC12-24V G3PE-515B G3PE-535B-3N DC12-24V G3R-ODX02SN-UTU DC5-24

Why Choose Omron relays?

Choose an Omron relay by load type and operating duty first. General-purpose and interface relays suit conventional contact switching; solid-state relays suit frequent DC or AC switching when the thermal design is correct; safety relays belong in a separately validated safety function.

  • General-purpose and interface relays for control-panel signal and load switching
  • Solid-state relays for frequent operation, with load-specific heat-sink and leakage-current checks
  • Safety relays for guarded circuits only as part of a validated safety architecture
  • Selection by coil voltage, contact arrangement, load rating and electrical life
  • Plug-in, PCB, panel and DIN-rail mounting options with model-specific accessories
omron industrial relays

Frequently Asked Questions

Should I use a mechanical interface relay or a solid-state relay?
Use a G2R/G6B mechanical relay for mixed loads, low-to-moderate cycle rates, and where contact state must be obvious — they tolerate inrush and inductive kick better per dollar. Use a G3NA/G3PE SSR for high-frequency switching (packaging machines, heater control via temperature controller), silent operation, and dusty environments — no contacts to wear out, but mind heat sinking and off-state leakage current. Above roughly 10 operations per second, SSR wins; below, mechanical is simpler and cheaper.
Does Omron make high-frequency and RF relays?
Yes, but they are signal-level products, not panel relays: the G6K and G6W families switch RF and high-frequency signals in telecom and RF test equipment. This category stocks Omron's industrial panel relays (G2R, G6B, G3NA, G3PE, G7TC, G7SA). If you need RF or coaxial signal switching, contact us with the frequency range, impedance and load, and we will check availability.
Which socket fits the G2R relay?
The G2R series uses Omron's P2RF socket family — P2RF-08 for the 2-pole (SPDT) and P2RF-14 for the 4-pole (4PDT), available as screw-terminal or push-in versions, with P2R-08P / P2R-14P hold-down clips. Always order relay + socket + clip together; the clip is what keeps the relay seated under vibration.
How do I verify a relay's contact rating for my load?
Check three numbers in the datasheet: rated load (resistive, e.g. 5 A at 250 VAC), the inductive rating with the relevant power factor, and the inrush rating for lamps/capacitive loads — a 5 A resistive rating does not mean 5 A of lamp load. If the load is inductive, also add suppression (RC snubber or diode for DC coils) to avoid arc erosion. Send the load type and current and we will confirm the relay suits it.