Solving your relay requirements since 1922 ST1A Series Solid State Delay-On-Make Timers Amperite Co. 567 52nd Street P.O. Box 329 West New York, NJ 07093 (800) 752-2329 www.Amperite.com ... 100% solid state circuitry - no moving parts ... CMOS digital timing circuitry ... Fixed or field adjustable delays from milliseconds to hours ... 2 amperes continuous load current (10 amperes available, consult factory) Timing Mode: Delay on operate begins upon application of input power. The load is energized at the end of the delay period and remains so until input power is removed. Timing Diagram: Contact Information: Solid state switching device 1 form A; normally open series connection. Continuous current rating 2 amperes. Maximum inrush 20 amperes. Voltage drop 2.5 volts RMS or less @ 2 amperes. (For 10 ampere load current rating consult factory). Note: Maximum current rating for 110V DC os 2 ampers (heat sink required). ) Solving your relay requirements since 1922 Amperite Co. 567 52nd Street P.O. Box 329 West New York, NJ 07093 (800) 752-2329 www.Amperite.com Timing Specifications: Timing: Factory fixed, or 0.1 seconds to 100 hours in any of the ranges below. Timing is set by user supplied resistor or potentiometer. Custom timing available. Timing ranges: .1 to 10 seconds 1 to 100 minutes .2 to 20 seconds 10 to 1000 minutes 1 to 100 seconds .1 to 10 hours 10 to 1000 seconds 1 to 100 hours .1 to 10 minutes Timing tolerance: fixed units +/- 10% Timing repeatability: 2% Timing cycle interrupt transfer: none Outline Dimensions: AC (60 Hz) and DC Input Voltages & Limits Nominal Minimum Maximum 12V 10V 14V 24V 20V 28V 48V 41V 55V Solving your relay requirements since 1922 110V 95V 125V 120V 105V 130V 230V 190V 255V Amperite Co. 567 52nd Street P.O. Box 329 West New York, NJ 07093 (800) 752-2329 www.Amperite.com External Resistor Selection: Wiring Diagrams: Mechanical Information: Enclosure 2 X 2 X 3/4 inch black plastic, epoxy sealed. Center hole mounting. Three or five 1/4 inch quick connect male terminals Solving your relay requirements since 1922 Amperite Co. 567 52nd Street P.O. Box 329 West New York, NJ 07093 (800) 752-2329 www.Amperite.com Ordering Information: Definition of a part number for the Amperite ST1A Series Time Delay Relay: Example: A: Denotes nominal input voltage. Voltages available: 12V, 24V, 120V & 230V AC; 12V, 24V, 48V & 110V DC. Custom voltages are available. B: Denotes type of input power required for operation: A = AC - Alternating Current; D = DC Direct Current. C & D: Denotes range of adjustability by using an external resistor or potentiometer, where C is the minimum timing and D is the maximum timing. Standard timing span is 100:1. For fixed timing units specify a single number. E: Denotes unit of time delay: S=seconds; M=minutes; H=hours. F: Denotes Amperite ST1A Series solid state, delay-on-make timer. Solving Your Relay Requirements Since 1922