Omron H3DT-HBL AC-DC24-48V — H3DT HBL 24 48 VAC/VDC
SKU: H3DT-HBL AC-DC24-48VUSD 41.00
22.5 mm DIN-rail power-OFF-delay timer with SPDT 5 A output; supply 24-48 VAC/VDC; two time ranges 1-12 s and 10-120 s
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Product Overview
The Omron H3DT-HBL AC-DC24-48V is the H3DT-HBL 24-48 VAC/VDC is Omron's 22.5 mm-wide power OFF-delay timer — a special-purpose timing relay where the SPDT contact stays energized for a configurable time after the supply voltage is removed. manufactured by Omron Corporation. Hengyixin Automation stocks this controller in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports.
This is the inverse of the standard ON-delay timer (H3DS-ML, already in catalog) which holds the relay OFF for a set time after power comes ON. H3DT = H3DT-series DIN-rail timer (the successor to the older H3DR / H3DS series, with improved EMC immunity).
The H3DT-HBL AC-DC24-48V ships from Xiamen with full datasheet documentation. The dial is a 0-100% fraction of the selected range (so 50% on the 10-120 s scale = 60 seconds).
Key Features
- 22.5 mm wide
- Coil/supply voltage 24-48 VAC/VDC universal
- H3DT-series DIN-rail power OFF-delay timer
- Time accuracy ±1% of full scale maximum
- SKU: H3DT-HBL AC-DC24-48V
- Series: H3DT Power OFF-Delay Timers
- Voltage: 24 TO 48 VAC
Best-Fit Applications
- Cooling-fan coast-down for a plastics-extrusion heater — the heater's 230 VAC control contactor is wired through the H3DT-HBL's SPDT: when.
- Power-dip ride-through on a control panel — when a brief utility brownout or fault clears within seconds, the H3DT-HBL holds.
- Lubrication-pump run-on after machine stop — when an industrial press's run-permission signal is removed, the H3DT-HBL holds the lubrication-pump contactor.
Buying Checklist
- Pick H3DK-M2 AC-DC24-240V for 8-mode timer with 24-240 VAC/VDC universal supply
- Pick H3YN-2-B DC24V for plug-in 4-mode timer with octal-pin socket for removable installation
- Pick H3DS-ML AC-DC24-48 / DC24-230 for 17.5 mm universal multi-function 8-mode timer with 0.1 s-120 h range
Technical Specifications
| Model | H3DT-HBL AC/DC24-48V |
|---|---|
| Series | H3DT Power OFF-Delay Timers |
| Type | Power OFF-delay timer, 22.5 mm DIN-rail mount, SPDT output |
| Operating Mode | Power OFF-delay (relay stays energized for set time after supply is removed) |
| Operating / Resetting | Instantaneous operation / Time-limit reset (standard) |
| Number of Time Ranges | 2 (1-12 s and 10-120 s, continuous analog dial) |
| Time Range Low | 1 to 12 s |
| Time Range High | 10 to 120 s |
| Rated Supply Voltage | 24 to 48 VAC 50/60 Hz / 24 to 48 VDC |
| Operating Voltage Range | 20 to 53 VAC / 20 to 53 VDC |
| Output Configuration | SPDT (1 Form C, 3 terminals: COM-NO-NC) |
| Min Switching Capacity | 100 mA at 5 VDC |
| Output Indicator | Orange LED (lights when SPDT contact is closed) |
| Operating Temperature | -20 to +60 °C |
| Storage Temperature | -30 to +70 °C |
FAQ for H3DT-HBL AC-DC24-48V
What is the difference between H3DT-HBL and H3DT-SL?
Both are H3DT-series DIN-rail timers in the same physical form factor (22.5 mm wide), but they differ in operating function: H3DT-HBL (this SKU) is a power OFF-delay timer — the SPDT contact closes immediately on power-on, then opens for the set time after power is removed. H3DT-SL is an ON-delay timer — the SPDT contact stays open for the set time after power-on, then closes indefinitely until power is removed (resets).
How do I set the time range on the H3DT-HBL?
The H3DT-HBL has a continuous analog dial on the front face with two numbers — a small 'low range' (1-12 s) and a large 'high range' (10-120 s). A selector pointer next to the dial chooses which range is active.
What happens if the supply voltage dips briefly (e.g., 200 ms brownout)?
Brief supply dips are the entire purpose of the H3DT-HBL's OFF-delay function. The internal timing capacitor holds enough energy to keep the SPDT contact closed during a 200 ms dip without resetting (typical). For a 1-second dip, the SPDT contact stays closed for the full duration of the dip and continues until the dip ends — the timer does NOT start timing during the dip; it just keeps the contact closed.
Can the H3DT-HBL drive a 230 VAC motor contactor coil?
Yes — the SPDT contact rating is 5 A at 250 VAC resistive (and 2 A at 250 VAC inductive with cosφ = 0.4), sufficient for direct switching of motor-contactor coils up to about 200 VA. Most industrial contactor coils (Schneider LC1D, Siemens 3RT, ABB AF, Eaton DIL) draw <10 VA at 230 VAC inrush and 5-8 VA held.
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