Omron H3Y-4 4PDT Miniature On-Delay Timer for Micro Loads

H3Y-4: four-pole miniature ON-delay timer with gold-clad contacts

The Omron H3Y-4 is the four-pole version of the H3Y miniature ON-delay timer. It has a 14-pin base matching the MY4 power relay and uses gold-clad plus silver-alloy contacts, which is why the datasheet recommends the H3Y-4 for switching micro loads. Seven Star LLC supplies the H3Y-4 in Oman and the GCC as an independent supplier in Muscat. The sections below explain the code and what to check when ordering.

• H3Y is the single-function miniature timer series.
• 4 means a 4PDT output on a 14-pin base.
• No 0 suffix means plug-in terminals; -0 would mean PCB terminals.
• The order states supply voltage and rated time as well, for example H3Y-4 24 VDC 10 S.

Compared with the 2-pole model the H3Y-4 trades current capacity for contact count and low-level reliability.

H3Y-4 technical specifications

Values come from the Omron H3Y datasheet. The 4-pole model has lower contact rating and fewer electrical operations than the DPDT model, but a better minimum load.

How H3Y-4 times and what the indicators show

The H3Y-4 operates like the H3Y-2: power-up starts the timer, the output changes at the end of the delay and holds until power is removed. A power-open time of 0.1 s resets it.

Four poles give separate circuits that can be switched together at the end of the delay. Gold-clad contacts hold low contact resistance with small currents, so signals from electronic circuits are less prone to intermittent contact. Two LEDs show power and output status.

Where H3Y-4 fits: sockets and related timers

The H3Y-4 matches the MY4 relay footprint on 14-pin sockets: PYFZ-14, PYFZ-14-E, PY14 and PY14-02. For two poles at higher current use H3Y-2. If you want multiple modes in four poles, look at H3YN-4 or H3YN-4-Z.

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-4

Settle these points before asking for a quotation on H3Y-4.

• State the rated time exactly.
• Choose the supply voltage, remembering 12 VDC is not available on 4PDT.
• Check the load; 3 A at 250 VAC resistive, and 1 mA at 1 VDC minimum.
• Select a 14-pin socket and clip.
• Decide between plug-in and PCB (-0) terminals.
• Check that four poles are really needed.

Installation, commissioning and maintenance of H3Y-4

Plug the H3Y-4 into a 14-pin socket and secure it with a clip. Check the pin diagram, as the 4PDT layout has more terminals.

• Check rated time and voltage marking.
• Do not exceed 3 A per pole.
• Keep signal wiring away from power cables.
• Use forked terminals on finger-safe sockets.
• Keep spares with the same rating.

Typical H3Y-4 applications in Oman and the GCC

Four-pole miniature timers are used where one delay must release several signals: staged release of interlocks, delayed enabling of PLC inputs, and sequence control in packaged equipment. In Oman and the GCC they appear in switchgear auxiliary panels and fire-and-gas interface cabinets.

Gold-clad contacts suit low-level signals in humid coastal conditions where oxidation of plain silver contacts could cause intermittent contact.

H3Y and H3YN family compared with H3Y-4

The table shows how H3Y-4 relates to the other miniature timers described in the same datasheet.

Information to send with an RFQ for H3Y-4

• Part number H3Y-4, supply voltage and quantity.
• Rated time.
• Terminal type.
• Load per pole.
• Socket needs.
• 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-4 and its siblings.

Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer. Send the part number H3Y-4 with the supply voltage and rated time, and we will confirm availability and lead time for Oman and the GCC.