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Omron H3YN-21 DC125 — Electronic Timers & Counters

Omron H3YN-21 DC125 Timer, DPDT, 125 VDC, 5A 250VAC

MPNH3YN-21 DC125
Active

Omron H3YN series multi-function timer relay, DPDT (2 Form C), 125 VDC supply, 0.1 min to 10 hrs delay range, 5 A at 250 VAC contact rating, plug-in socket mount.

$107.66Ref. price · indicative, final on quote
Omron H3YN-21 DC125 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

H3YN-21 DC125 — Identification
ParameterValue
SeriesH3YN
H3YN-21 DC125 — Function & Modes
ParameterValue
FunctionProgrammable (Multi-Function)
H3YN-21 DC125 — Timing & Counting
ParameterValue
Delay time range0.1 Min ~ 10 Hrs
Timing adjustment methodHand Dial
Timing initiate methodInput Voltage
H3YN-21 DC125 — Electrical
ParameterValue
Supply voltage125VDC
H3YN-21 DC125 — I/O & Contacts
ParameterValue
Contact rating @ voltage5A @ 250VAC
Contact circuit (Form)DPDT (2 Form C)
Relay typeMechanical Relay
H3YN-21 DC125 — Mechanical
ParameterValue
Mounting typeSocketable
Termination stylePlug In

Product details

What the H3YN-21 DC125 actually does

The Omron H3YN-21 DC125 is a multi-function, plug-in timing relay in the H3YN series, initiated by the input supply voltage itself, with a DPDT (2 Form C) mechanical-relay output that switches 5 A at 250 VAC across two independent circuits. Its delay is set on a front-panel hand dial from 0.1 min to 10 hrs, so the same unit covers short-cycle sequencing and long-duration process intervals without re-specifying the timer.

Panel fit and wiring

Supply is 125 VDC, which sets it apart from the more common 24 VDC and 240 VAC variants in the H3YN family and confirms it for control panels fed from a station battery or a rectified instrument bus.

Frequently asked questions

What supply voltage and timing range does the H3YN-21 DC125 cover?

It runs on a 125 VDC supply and times from 0.1 min to 10 hrs across the multi-function modes, which is what makes the DC125 suffix distinct from the more common 24 VDC and 240 VAC H3YN variants.

What contacts does the H3YN-21 DC125 switch?

DPDT (2 Form C) mechanical-relay contacts rated 5 A at 250 VAC, so a single timer drives two independent load circuits from one timing element.

How is the H3YN-21 DC125 mounted?

It is a socketable, plug-in unit supplied in bulk, intended for an 8-pin octal base wired to the control panel — the timer itself does not DIN-rail mount directly.

MPN
H3YN-21 DC125