Omron Time Relay H3BA-N8H H3BAN8H

Omron H3BA-N8H | Solid-State Multi-Range Timer — 0.05 s to 300 h / 5A / SPDT-DPDT / 8-Pin / 48×48mm Panel

Part Number: H3BA-N8H

Manufacturer: Omron Corporation (Japan)

Series: H3BA-N 

Wide Time Range, Switchable Output — From Seconds to Hundreds of Hours on One Unit

The H3BA-N8H covers timing applications from 0.05 seconds to 300 hours — a span that handles both rapid machine sequencing and multi-hour process timing with the same hardware. No separate short-range and long-range timers need to be stocked; this single unit covers the full span across its selectable time ranges, with the desired range set by the range selector on the front face.

The output selector is the H3BA-N8H's distinguishing feature versus a simpler timer: the same unit can produce a time-limit SPDT output (one changeover contact on the timed output) or switch to time-limit DPDT mode (two changeover contacts on the timed output) depending on the circuit requirement. For the 8-pin model, the two available operating modes are ON-delay and ON-delay with instantaneous contact — where the instantaneous contact activates immediately at power-on while the time-limit contact delays.

The 48×48mm front panel fits the 1/16 DIN cutout standard found across Omron's H3 series timers, signal conditioners, and similar panel-mounted components. Front indicators show power-ON and output-ON status independently.

Key Specifications

H3BA-N8H vs H3BA-N (11-Pin)

The 8-pin model covers the majority of ON-delay applications. The 11-pin model adds flicker ON-start, flicker OFF-start, interval, and signal off-delay modes for circuits requiring these functions. Select based on the required operating mode.

FAQ

Q1: What is the difference between the H3BA-N8H and H3BA-N (11-pin)?

The 8-pin H3BA-N8H provides two operating modes: ON-delay and ON-delay with instantaneous output contact. The 11-pin H3BA-N provides six operating modes including flicker ON-start, flicker OFF-start, interval, and signal off-delay — suitable for a wider range of timing circuit designs. The two models use different sockets and are not interchangeable in an existing socket installation.

Q2: How is the time range set on the H3BA-N8H?

The time range is set using the range selector on the front of the timer. The analog dial sets the specific time value within the selected range. Omron offers optional setting rings (ordered separately) to constrain the dial to a fixed range — preventing accidental adjustment in production environments.

Q3: Can the H3BA-N8H switch between SPDT and DPDT output?

Yes. The output type selector on the front face of the H3BA-N8H switches between time-limit SPDT output and time-limit DPDT output using a screwdriver. This selector also switches the operating mode between ON-delay and ON-delay with instantaneous contact. No wiring change is required — only the selector position changes.

Q4: What socket is required for the H3BA-N8H?

The 8-pin model requires the P2CF-08 (back-connecting) or P3G-08 (track-mounting front-connecting) socket. The P3G-08 allows DIN rail mounting of the socket-and-timer assembly. Sockets are not included with the timer and must be ordered separately.

Q5: The timer output does not activate at the set time. What should be checked?

Verify the supply voltage is present and within the rated range. Confirm the range selector is set to the correct time range for the required delay. Ensure the time dial setting is not at minimum. If the timer uses a start/gate input (pin 2), verify the input signal is correctly applied. For the ON-delay mode, power must be continuously applied for the set duration before the output activates.