Omron G3B-205S Solid State Relay: Comprehensive Technical Guide for Industrial Automation

16 de enero de 2026

Historical parts record: Photos and notes below belong to this record. Confirm the offered unit’s full model, condition and available test evidence before ordering.

What is the Omron G3B-205S solid state relay?

The G3B-205S is Omron's plug-in solid state relay — a 5 A / 250 V AC output SSR on a round 8-pin plug that seats into the G3B socket base, controlled from a 4–30 V DC input. The base of every unit carries the full marking: OMRON G3B-205S SOLID STATE RELAY, LOAD: 5A 250 VAC, INPUT: 4~30 VDC, MADE IN JAPAN, with the date codes 04X5E, 0126E, 1536E and 2616E across the lot. This record is a lot of twelve reconditioned units graded to recharge-new (翻新可以充新), one-year warranty as recorded, photographed April 2025 at intake. All ten photos and the inspection video show these exact relays.

2 min readContent reviewed 8 October 2026

Part details

G3B-205S, as read from the base marking and the construction
Field	Value
Brand	Omron — MADE IN JAPAN
Model	G3B-205S plug-in solid state relay (8-pin round plug for the G3B socket base)
Output	Load: 5 A at 250 V AC
Input	4–30 V DC control
Construction	Black finned aluminium case, round 8-pin plug head, screw-fixed end caps
Date codes	04X5E, 0126E, 1536E, 2616E — several production lots across the twelve
Condition	Reconditioned, graded recharge-new (翻新可以充新), 1-year warranty, intake April 2025

Scroll sideways to see the full table.

Values are read from the base marking and the photographed construction in the photo set.

Why the plug-in SSR format survives

The G3B format separates the two things that age differently in a heater-control panel: the relay and its heatsink socket. The SSR module carries the triac and the control circuit; the G3B base carries the heatsink and the load wiring. When a relay fails, it unplugs — no rewiring, no heatsink work — and a spare drops in. The 4–30 V DC input accepts any PLC transistor output directly, and the 5 A / 250 V AC output covers a band heater, a solenoid or a small blower per channel. The finned aluminium case is the module's own heat path into the socket, and the date codes across this lot span several production waves — all the same 205S spec, bought as a bench and spares set.

The twelve units in this record are reconditioned to the recharge-new grade the intake books: tested, cleaned, and photographed from every angle — the plugs bright, the fins straight, and the base markings legible unit by unit. For a heater panel whose G3B sockets are still good, this is the refill lot that keeps the line running.