The Omron G7SA-3A1B DC21 is a safety relay with a 24 VDC coil and forced-guided contact set: 3 normally open and 1 normally closed. The forced-guided (mechanically linked) contact structure is the key feature here — it ensures that NO and NC contacts cannot be simultaneously closed, which is a requirement for safety circuits up to Category 4 / PL e per ISO 13849-1. This relay is typically used in emergency stop circuits, safety gate monitoring, and two-hand control stations where the machine must detect a welded contact before the next cycle.
Omron G7SA-3A1B DC21 Safety Relay, 24 VDC Coil, 3NO+1NC
MPNG7SA-3A1B DC21
Omron G7SA series, safety relay, order code G7SA-3A1B DC21, 24 VDC coil, 3 normally open + 1 normally closed forced-guided contacts, 0.05 kg.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Weight | 0.05 kgs |
Product details
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MPN
G7SA-3A1B DC21