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Power OFF-delay Timer


24 to 48 VAC 50/60 Hz, 24 to 48 VDC, Output Relay output (SPDT), Power OFF-delay, Time range: 1 to 12 s (2 range), Terminal blocks

Rated power supply voltage 24 to 48 VAC 50/60 Hz
24 to 48 VDC Ripple 20% max.
Control output (Type) Relay output (SPDT)
Operating resetting Instantaneous operation/Time-limit reset
Connecting method Terminal blocks

Item list of H3DK-H

  • Ratings/Specifications
Rated power supply voltage24 to 48 VAC 50/60 Hz
24 to 48 VDC Ripple 20% max.
Allowable voltage variable range85 to 110% of the power supply voltage
Power consumptionApprox. 1.2 VA (at 48 VAC)
Number of time ranges2
Operation modePower OFF-delay
Control output (Type)Relay output (SPDT)
Control output (Contact output)Resistive load: 250 VAC 5 A (cosφ=1)/5 A at 30 VDC
Minimum applicable load: 100 mA at 5 VDC (failure level: P Reference value)
Operating resettingInstantaneous operation/Time-limit reset
Ambient temperature rangeOperating: -20 to 55 ℃ (with no icing)
Storage: -40 to 70 ℃ (with no icing)
Ambient humidity rangeOperating: 25 to 85%
Accuracy of operating time±1% FS max.
Setting error±10% FS ±0.05 s max.
Influence of voltage±0.5% FS max.
Influence of temperature±2% FS max.
Insulation resistance100 MΩ min. (at 500 VDC)
Dielectric strengthBetween current carrying metal parts and non-current carrying metal parts: 2,000 VAC 50/60 Hz 1 min
Between control output terminals and operating circuit: 2,000 VAC 50/60 Hz 1 min
Between non-continuous contacts: 1,000 VAC 50/60 Hz 1 min
Impulse withstand voltageBetween power terminals: 1 kV
Between current carrying terminals and exposed non-current carrying metal parts: 1.5 kV
Noise immunity±1.5 kV (between power terminals), square-wave noise by noise simulator (pulse width: 100 ns/1 µs, 1-ns rise)
Static immunityMulfunction: 4 kV, Destruction: 8 kV
Vibration resistanceDestruction: 10 to 55 Hz, 0.75 mm single amplitude each in 3 directions for 2 h
Malfunction: 10 to 55 Hz, 0.5 mm single amplitude each in 3 directions for 10 min
Shock resistanceDestruction: 1,000 m/s2, 3 times each in 6 directions
Malfunction: 100 m/s2, 3 times each in 6 directions
Life expectancy (relay output)Electrical: 100,000 operations min. (5 A at 250 VAC, resistive load at 1200 operations/h)
Mechanical: 10 million operations min. (under no load at 1,200 operations/h)
Degree of protectionIP30 (Terminal Block: IP20)
Connecting methodTerminal blocks
AccessoriesUser label
WeightApprox. 120 g
  • Dimensions

Outline drawing

  • Internal connection

Internal connection

  • Terminal arrangement

Terminal arrangement

  • Time ranges

Time ranges

  • Operating chart

Operating chart

Power OFF-delay


Power OFF-delay Timer