The Omron H3FA-A DC12 Timer is designed for stable timing performance using an allowable voltage variable range of 85 to 110% of the power supply voltage. It supports 4 time ranges and operates in Power ON-delay, Cumulative modes for controlled timing applications. The timer provides Time-limit SPST-NO and Time-limit SPST-NC output types with a reset time of 10 ms max. to ensure dependable switching response. Built with a PCB terminal connecting method, this model is manufactured by Omron, listed under Omron Timers, and part of the Omron H3FA Series
Resistive load: 3 A at 250 VAC
Minimum applicable load: 10 mA at 5 VDC (failure level: P Reference value)
Operating resetting
Time-limit operation/power-OFF resetting and external resetting, Integrating operation/power-OFF resetting and external resetting
Connection method
PCB terminal
Power consumption
Approx. 270 mW
Ambient temperature range
Operating: -10 to 55 ℃ (with no icing)
Storage: -25 to 65 ℃ (with no icing)
Accuracy of operating time
±0.5% FS max. (±0.5% ±10 ms in a range of 1 s)
Setting error
0 to +30% FS max. (at 20 ℃, rated voltage)
Influence of voltage
±1% FS max.
Influence of temperature
±5% FS max. (±5% ±10 ms in a range of 1 s)
Insulation resistance
100 MΩ min. (at 500 VDC)
Dielectric strength
Between control output terminals and operating circuit: 1,500 VAC 50/60 Hz 1 min
Between non-continuous contacts: 1,000 VAC 50/60 Hz 1 min
Vibration resistance
Destruction: 10 to 55 Hz, 0.375 mm single amplitude each in 3 directions for 2 h
Malfunction: 10 to 55 Hz, 0.25 mm single amplitude each in 3 directions for 10 min
Shock resistance
Destruction: 1,000 m/s2, 3 times each in 6 directions
Malfunction: 100 m/s2, 3 times each in 6 directions
Ambient temperature range
Operating: -10 to 55 ℃ (with no icing)
Storage: -25 to 65 ℃ (with no icing)
Ambient humidity range
Operating: 35 to 85%
Reset time
10 ms max.
Life expectancy (relay output)
Electrical: 100,000 operations min. (3 A at 250 VAC, resistive load at 1800 operations/h)
Mechanical: 10 million operations min. (under no load at 1,800 operations/h)
