Omron H3DT-A1 AC/DC24-240
Single function timer with 0.1 s - 1200 h timing range, SPDT output contacts and 24-240 V AC, 24-240 V DC supply

Image is for illustrative purposes only. Please refer to product description.
Delivery options
What sets the H3DT-A1 AC/DC24-240 apart in the H3DT time delay relays family: operating mode ON Delay (Power ON Start), functions single function and contact description SPDT. Omron H3DT-A1 AC/DC24-240 is an analogue timing relay with SPDT contacts. The listed adjustment range is 0.1 s - 1200 h; this ordering variant accepts 24-240 V AC, 24-240 V DC. Its connection style is push-in.
- Manufacturer
- Omron
- Manufacturer part no.
- H3DT-A1 AC/DC24-240
- Product family
- Omron H3DT time delay relays
- Type
- Time delay relay
- Category
- Contactors and relays › Time delay relays
- Lifecycle
- To be confirmed
- OEM successor
- Not stated
- Technical datasheet
- Data sheet
Technical specifications
- Manufacturer
- Omron
- Manufacturer part no.
- H3DT-A1 AC/DC24-240
- Type
- Time delay relay
- Application
- Timed switching and sequencing in control panels, subject to the selected timing function and contact load rating.
- Used with
- A compatible mounting arrangement and wiring circuit. For plug-in models, verify the socket and pin layout separately.
- Type
- Analog
- Installation type
- DIN rail
- Functions
- Single function
- Size
- 17.5 mm
- Terminal type
- Push-in
- Operating mode
- ON Delay (Power ON Start)
- Output type
- Relay
- Contact description
- SPDT
- Time range
- 0.1 s - 1200 h
- Supply voltage AC
- 24-240 V
- Supply voltage DC
- 24-240 V
Technical documents (1)
Key features
- Single function timing function
- 0.1 s - 1200 h range
- SPDT contacts
- DIN rail installation
- Push-in terminals
About the Omron H3DT-A1 AC/DC24-240
The selected timing mode determines how the relay responds to power or a control input. Match the operating sequence and the complete supply suffix when replacing an installed timer.
What is the H3DT-A1 AC/DC24-240 used for?
Timed switching and sequencing in control panels, subject to the selected timing function and contact load rating.
Lifecycle and successor
To be confirmed.
Before you order
What to photograph or confirm so the right unit is quoted.
Confirm the complete ordering designation and supply-voltage suffix. Match the operating mode and timing range to the required start/reset sequence. Verify the contact arrangement, load rating and control-input type. For plug-in versions, check socket pin count and wiring; for DIN-rail versions, check panel space and terminals. Provide the existing nameplate, circuit diagram, quantity and required delivery date.
Other parts in the Omron H3DT time delay relays family
Listed for reference. They differ from the H3DT-A1 AC/DC24-240 in rating, supply, interface or function and are not interchangeable with it unless Omron says so. Match the part number on your unit.
| Product | Type | Lifecycle | Qty Available | Price | Action |
|---|---|---|---|---|---|
| Omron H3DT-A2 AC/DC24-240Single function timer with 0.1 s - 1200 h timing range, DPDT output contacts and 24-240 V AC, 24-240 V DC supply | Time delay relay | To be confirmed | In stock | On request | View |
| Omron H3DT-F AC/DC24-240Twin timer with 0.1 s - 1200 h timing range, SPDT output contacts and 24-240 V AC, 24-240 V DC supply | Time delay relay | To be confirmed | In stock | On request | View |
| Omron H3DT-G AC/DC24-240Star-delta timer with 0.1 s - 120 s timing range, 2 x SPDT output contacts and 24-240 V AC, 24-240 V DC supply | Time delay relay | To be confirmed | In stock | On request | View |
| Omron H3DT-HBL AC/DC24-48Power OFF-delay timer with 0.1 s - 120 s timing range, SPDT output contacts and 24-48 V AC, 24-48 V DC supply | Time delay relay | To be confirmed | In stock | On request | View |
| Omron H3DT-HBS AC/DC24-48Power OFF-delay timer with 0.1 s - 12 s timing range, SPDT output contacts and 24-48 V AC, 24-48 V DC supply | Time delay relay | To be confirmed | In stock | On request | View |
| Omron H3DT-L1 AC/DC24-240Multi-functional timer with 0.1 s - 1200 h timing range, SPDT output contacts and 24-240 V AC, 24-240 V DC supply | Time delay relay | To be confirmed | In stock | On request | View |
| Omron H3DT-L2 AC/DC24-240Multi-functional timer with 0.1 s - 1200 h timing range, DPDT output contacts and 24-240 V AC, 24-240 V DC supply | Time delay relay | To be confirmed | In stock | On request | View |
| Omron H3DT-N1 AC/DC24-240Multi-functional timer with 0.1 s - 1200 h timing range, SPDT output contacts and 24-240 V AC, 24-240 V DC supply | Time delay relay | To be confirmed | In stock | On request | View |
| Omron H3DT-N2 AC/DC24-240Multi-functional timer with 0.1 s - 1200 h timing range, DPDT output contacts and 24-240 V AC, 24-240 V DC supply | Time delay relay | To be confirmed | In stock | On request | View |
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