The 388 timers are square base, bladed versions of time delay relays. On delay, off delay and interval functions are all available with either AC or DC inputs. On delay and interval products can have up to three poles. Off delays have two poles. The timing circuit is oscillator based. Fixed time and externally adjustable versions. Both socket and flange mount versions are available.
Additional contact configurations and coil options are available – please use the RFQ/RFI tab above to submit your request.
Functions Available |
N/A On-delay |
Timing Range |
N/A 1.2 to 120 s |
External Resistor |
N/A N/A Ω/s |
Timing Adjustment |
N/A Knob |
Timing Repeatability (Constant voltage and temperature) |
N/A 0.1% |
Reset Time maximum |
N/A 150mS |
Input Pulse Length minimum |
N/A 50mS |
Contact Configuration |
N/A 2PDT |
Contact Material |
N/A Silver Alloy |
Contact Rating |
N/A 12 A |
Contact Rating 120 / 240VAC Resistive |
N/A 12 A / 12 A |
Contact Rating 28VDC Resistive |
N/A 12 A |
Contact Rating Motor 120VAC |
N/A 1/3 hp |
Contact Rating Motor 240VAC |
N/A 1/2 hp |
Minimum Contact Load |
N/A 500 mW |
Contact Resistance, Initial |
N/A 100 milliohms max at 6VDC, 1A |
Coils Available |
N/A AC and DC |
Transient Protection |
N/A YES |
Reverse Polarity Protection |
N/A Yes |
Nominal Coil Power AC |
N/A 2.75 VA |
Nominal Coil Power DC |
N/A 2 W |
Input Voltage Tolerance - AC |
N/A 85% to 110% of nominal |
Input Voltage Tolerance - DC |
N/A 80% to 110% of nominal |
Duty |
N/A Continuous |
