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Omron G7SA-5A1B DC21 — Safety Relays

Omron G7SA-5A1B DC21 Safety Relay, 5 N.O. + 1 N.C., 21 VDC

MPNG7SA-5A1B DC21

Omron G7SA series, safety relay, 5 N.O. + 1 N.C. forced-guided contacts, 21 VDC coil, 0.02 kg.

$30.39Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

G7SA-5A1B DC21 — Mechanical
ParameterValue
Weight0.02 kgs

Product details

The Omron G7SA-5A1B DC21 is a force-guided safety relay with 5 normally-open and 1 normally-closed contact set, driven by a 21 VDC coil. It belongs to the G7SA series of compact safety relays designed for monitoring emergency-stop circuits, safety gates, and light curtains in control panels where mechanically linked contacts are required per IEC 60947-5-1 and ISO 13849.

The 5 N.O. + 1 N.C. arrangement is common in safety circuits where multiple redundant channels are needed — the N.O. contacts carry the safety path, and the N.C. contact provides feedback to the safety controller or monitors the relay's own welded-contact status. Force-guided construction means all contacts move together; if any N.O. contact welds, the N.C. contact cannot close, giving the safety system a reliable signal that the relay is compromised.

Frequently asked questions

Where can I buy the G7SA-5A1B DC21 and how is it quoted?

The G7SA-5A1B DC21 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

What is the closest pin-compatible alternative to this relay?

Within the Omron G7SA family, the G7SA-5A1B with different coil voltages (e.g., 24 VDC, 110 VAC) shares the same contact arrangement and footprint. The deciding factor is your control voltage — the 21 VDC coil is a less common variant, so if your bus is 24 VDC, the 24 VDC coil version is a direct pin-compatible swap.

What compliance documentation does Omron provide for the G7SA-5A1B DC21?

Omron typically provides RoHS and REACH declarations for the G7SA series. For specific UL, IEC, or TÜV certificates tied to this exact order code, request the compliance pack at quote time — it varies by production batch and region.

MPN
G7SA-5A1B DC21