Multi-range, Multi-mode Timer H3DK-M / -S

• Multiple time ranges and operating modes let you cover a wide range of applications.

• The time-limit DPDT output contacts can be changed to time-limit SPDT and instantaneous SPDT output contacts using a switch.

• Sequence checks are easily performed by setting an instantaneous output to 0.

• Start signal control for the H3DK-M.

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Time Ranges


Time range
0.1 s 1 s 10 s 1 min 10 min 1 h 10 h 100 h
Set time
0.1 to 1.2 s 1 to 12 s 10 to 120 s 1 to 12 min 10 to 120 min 1 to 12 h 10 to 120 h 100 to 1,200 h


Note: When the main dial is set to “0” for all settings, the output will operate instantaneously



Power supply voltage *1 24 to 240 VAC/DC, 50/60 Hz *2
12 VDC *2
Allowable voltage fluctuation
24 to 240 VAC/DC: 85% to 110% of rated voltage
12 VDC: 90% to 110% of rated voltage
Power reset Minimum power-OFF time: 0.1 s
Reset voltage 10% of rated voltage
Voltage input 24 to 240 VAC/DC
High level: 20.4 to 264 VAC/DC, Low level: 0 to 2.4 VAC/DC
12 VDC
High level: 10.8 to 13.2 VDC, Low level: 0 to 1.2 VDC
H3DK-M2/-S2 At 240 VAC: 6.6 VA max. *4
H3DK-M1/-S1 At 240 VAC: 4.5 VA max. *4
H3DK-M2A/-S2A At 12 VDC: 0.9 W max.
H3DK-M1A/-S1A At 12 VDC: 0.6 W max.
Control output Contact output:
5 A at 250 VAC with resistive load (cosφ = 1),
5 A at 30 VDC with resistive load *5,
0.15 A max. at 125 VDC with resistive load,
0.1A at 125 VDC with L/R of 7 ms.
The minimum applicable load is 10 mA at 5 VDC (P reference value).
Contact materials: Ag-alloy + Gold plating
Ambient operating temperature -20 to 55°C (with no icing)
Storage temperature -40 to 70°C (with no icing)
Ambient operating humidity 25% to 85%



*1. When using a 24-VDC power supply voltage, there will be an inrush current of approximately 0.25 A. Allow for this
inrush current when turning ON and OFF the power supply to the Timer with device with a solid-state output, such
as a sensor.
*2. DC ripple: 20% max.
*3. The power consumption is for mode A after the Timer times out.
For the H3DK-M[], the maximum power consumption is given, including the current consumed by the input circuit.
*4. Refer to DC Power Consumptions (Reference Information) on Catalog for DC power consumptions.
*5. The control output ratings are for one H3DK operating alone. If you operate two or more Timers side by side, refer
to Installation Pitch and Output Switching Capacity (Reference Values) on the Catalog.
*6. 125 VDC: 0.15 A max. with resistive load, 125 VDC: 0.1 A with L/R of 7 ms.
Minimum load: 10 mA at 5 VDC (P level, reference value)




Accuracy of operating time ±1% of FS max. (±1% ±10 ms max. at 1.2-s range) *
Setting error ±10% of FS ±0.05 s max. *
Minimum input signal width 50 ms* (start input)
Influence of voltage ±0.5% of FS max. (±0.5% ±10 ms max. at 1.2-s range)
Influence of temperature ±2% of FS max. (±2% ±10 ms max. at 1.2-s range)
Insulation resistance 100 MΩ min. at 500 VDC
Dielectric strength Between current-carrying metal parts and exposed non-current-carrying metal parts:
2,000 VAC 50/60 Hz for 1 min.
Between control output terminals and operating circuit: 2,000 VAC 50/60 Hz for 1 min.
Between contacts not located next to each other: 1,000 VAC 50/60 Hz for 1 min.
Impulse withstand voltage 24 to 240 VAC/VDC: 5 kV between power terminals, 5 kV between current-carrying
metal parts and exposed non-current-carrying metal parts
12 VDC: 1 kV between power terminals, 1.5 kV between current-carrying metal parts
and exposed non-current-carrying metal parts
Noise immunity Square-wave noise generated by noise simulator (pulse width: 100 ns/1 μs, 1-ns rise):
±1.5 kV
Static immunity Malfunction: 4 kV, Destruction: 8 kV
Destruction 0.75-mm single amplitude at 10 to 55 Hz for 2 h each in 3 directions
Malfunction 0.5-mm single amplitude at 10 to 55 Hz for 10 min each in 3 directions
Destruction 1,000 m/s2 3 times each in 6 directions
Malfunction 100 m/s2 3 times each in 6 directions
Mechanical 10 million operations min. (under no load at 1,800 operations/h)
Electrical 100,000 operations min. (5 A at 250 VAC, resistive load at 360 operations/h)
Degree of protection IP30 (Terminal block: IP20)
Weight Approx. 120 g



* With the H3DK-M[], if the voltage exceeds 26.4 VAC/DC in mode C, D, or G, the OFF trigger signal characteristics are
as follows:
Accuracy of operating time: ±1% ±50 ms max.
Setting error: ±10% +100 ms, −50 ms max.
Minimum input signal width: 100 ms


Installation Pitch and Output Switching Capacity (Reference Values)

The relation between the installation pitch and the load current is shown in the following graph. (Except for the H3DK-GE)
If Timer is used under load conditions that exceed the specified values, the temperature inside the Timer will increase, reducing the life expectancy of internal parts.

H3DK-M / -S Specifications 7

Testing Method

Tested Timer: H3DK-M/-S
Applied voltage: 240 VAC
Installation pitch: 0, 5, 10, and 50 mm

H3DK-M / -S Specifications 8

Applicable standards


Safety standards cURus: UL 508/CSA C22.2 No. 14
EN 50274: Finger protection, back-of-hand proof
EN 61812-1: Pollution degree 2, Overvoltage category III
CCC: GB/T 14048.5 Pollution degree 2, Overvoltage category III *
LR: Test Specification No. 1-2002 Category ENV 1.2
EMC (EMI) EN61812-1
Radiated Emissions: EN 55011 class B
Emission AC Mains: EN 55011 class B
Harmonic Current: EN 61000-3-2
Voltage Fluctuations and Flicker: EN61000-3-3
(EMS) EN61812-1
Immunity ESD: IEC61000-4-2
Immunity RF-interference: IEC61000-4-3
Immunity Burst: IEC61000-4-4
Immunity Surge: IEC61000-4-5
Immunity Conducted Disturbance: IEC61000-4-6
Immunity Voltage Dip/Interruption: IEC61000-4-11


* CCC certification requirements


Recommended fuse 0216005 (250 VAC, 5 A) manufactured by Littelfuse
Rated operating voltage Ue
Rated operating current Ie
AC-15: Ue: 250 VAC, Ie: 3 A
AC-13: Ue: 250 VAC, Ie: 5 A
DC-13: Ue: 30 VDC, Ie: 0.1 A
Rated insulation voltage 250 V
Rated impulse withstand voltage
(altitude: 2,000 m max.)
4 kV (at 240 VAC)
Conditional short-circuit current 1,000 A


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