Omron H3Y-2 DPDT Miniature On-Delay Timer for MY Sockets

H3Y-2: miniature ON-delay timer with a relay-style 8-pin base

The Omron H3Y-2 is a miniature solid-state ON-delay timer with a DPDT output and the same 8-pin layout as the MY power relay, so it plugs into relay sockets. The delay is set by a large transparent dial within a fixed range chosen when ordering, and two LEDs show power and output state. Seven Star LLC supplies the H3Y-2 in Oman and the GCC as an independent supplier in Muscat. This page explains the code and the ordering details.

• H3Y is the single-function miniature timer series.
• 2 means a DPDT output (4 would mean 4PDT).
• No 0 suffix means plug-in terminals; -0 would mean PCB terminals.
• No B suffix means a beige body with output terminals on top; B means black with supply terminals on top.
• The order also states supply voltage and rated time, for example H3Y-2 100 to 120 VAC 0.5 S.

Because it is a fixed-range timer, each unit is built for one rated time such as 5 s or 30 min. That makes setting simple, but it also means the rated time must be chosen carefully before the order is placed.

H3Y-2 technical specifications

Values come from the Omron H3Y datasheet. DC models include a diode to prevent damage from reverse voltage, and the datasheet advises against using inverter output as supply.

How H3Y-2 times and what the indicators show

The H3Y-2 starts timing when power is applied. When the set time elapses the output relay switches and stays switched until power is removed. Removing power for 0.1 s or more resets the timer, even partway through a delay.

Rated times are discrete: 0.5, 1, 5, 10, 30, 60 and 120 seconds, and 3, 5, 10, 30 and 60 minutes and 3 hours. For each, the dial adjusts within the range shown in the table, so a 10 s unit can be set between 0.5 and 10 s. A green LED indicates power and an orange LED indicates output ON.

Where H3Y-2 fits: sockets and related timers

The H3Y-2 shares its pin layout with the MY2 relay family, so sockets can be common between timers and relays in the same panel. If you need to select among several modes with one unit, the H3YN-2 is the multi-mode relative. The 4-pole H3Y-4 is intended for micro-load switching on a 14-pin base.

Sockets and hold-down clips are not included with the timer and must be ordered separately. Accessories named in the datasheet include the Y92F-78 flush-mounting adapter, PYP-1 and PYP-18 mounting plates, Y92H-3 and Y92H-4 hold-down clips and PYCZ-C08 and PYCZ-C14 terminal covers. The PYFZ-@-E sockets have finger protection and need forked crimp terminals, not round ones.

Selection and ordering checklist for H3Y-2

Settle these points before asking for a quotation on H3Y-2.

• State the rated time precisely, as it is fixed in the unit.
• Choose the supply voltage from the list; 12 VDC is available only on DPDT models.
• Check the contact load against 5 A at 250 VAC resistive.
• Select the socket type and order it separately along with clips.
• Consider H3Y-2-0 if PCB mounting is needed.
• Decide if a black B version is needed for Push-In Plus sockets.

Installation, commissioning and maintenance of H3Y-2

Plug the H3Y-2 into its 8-pin socket and secure with a hold-down clip. Set the dial using a flat-blade or Phillips screwdriver if a tool is easier than the knob.

• Check the rated time marked on the front before wiring.
• Verify the supply voltage marking.
• Make sure power is cut for at least 0.1 s to reset in the sequence.
• Use forked terminals on finger-safe sockets.
• Keep spares with the same rated time and voltage.

Typical H3Y-2 applications in Oman and the GCC

Miniature ON-delay timers like the H3Y-2 are used in control panels where a fixed delay is needed in a very compact space: delayed start of auxiliary pumps, staggered starting of fans, delayed release of brakes and pre-lubrication delays. In Oman and the GCC they appear in HVAC panels, small motor-control assemblies and packaged equipment.

Because the base is relay-style, a technician who can replace an MY relay can replace this timer, which reduces training needs. Ambient limits of −10 to 50°C should be checked against hot panels.

H3Y and H3YN family compared with H3Y-2

The table shows how H3Y-2 relates to the other miniature timers described in the same datasheet.

Information to send with an RFQ for H3Y-2

• Part number H3Y-2, supply voltage and quantity.
• Rated time (for example 5 s, 30 s, 10 min).
• Terminal type: plug-in or PCB.
• Output load.
• Socket and clip requirements.
• Delivery location.

Documents and quotation

A datasheet for the H3Y series is attached on this page, covering the model legend, ordering information, time ranges, ratings, timing charts and precautions for H3Y-2 and its siblings.

Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer. Send the part number H3Y-2 with the supply voltage and rated time, and we will confirm availability and lead time for Oman and the GCC.