Struthers-Dunn - Item # 388ACPSOX-1-120VAC, 388 Series - Time Delay Relays

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Item # 388ACPSOX-1-120VAC 388 Series - Time Delay Relays


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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.

For Additional Configuration please contact the manufacturer.

388 Series - Time Delay Relays

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388 Series - Time Delay Relays - Dimensional Picture

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Specifications · Timing · Contacts · Coil · Dielectric Strength · Temperature · Life Expectancy · Miscellaneous

Specifications

Series

388

Type

On delay plug-in

Nominal Input Voltage

120 VAC

Timing

Functions Available

On-delay, Off-delay, Interval

Timing Range

0.1 to 10 s

External Resistor

20,000 ohms/s

Timing Adjustment

Knob or external R

Timing Repeatability (Constant voltage and temperature)

0.1%

Reset Time maximum

150

Input Pulse Length minimum

50

Contacts

Contact Configuration

2PDT, 3PDT

Contact Material

Silver Alloy

Contact Rating

12 A

Contact Rating 120 / 240VAC Resistive

12 A / 12 A

Contact Rating 28VDC Resistive

12 A

Contact Rating Motor 120VAC

1/3 hp

Contact Rating Motor 240VAC

1/2 hp

Minimum Contact Load

500 mW

Contact Resistance, Initial

100 milliohms max at 6VDC, 1A

Coil

Coils Available

AC and DC

Transient Protection

Yes

Reverse Polarity Protection

Yes

Nominal Coil Power AC

2.75 VA

Nominal Coil Power DC

2 W

Input Voltage Tolerance - AC

85% to 110% of nominal

Input Voltage Tolerance - DC

80% to 110% of nominal

Duty

Continuous

Dielectric Strength

Across Open Contacts

500 Vrms

Between Mutually Insulated Point

1500 Vrms

Insulation Resistance

1,000 Mohms min at 500VDC

Temperature

Operating

-20 to 55 ºC
-4 to 131 ºF

Storage

-40 to 85 ºC
-40 to 185 ºF

Life Expectancy

Electrical (full load)

100,000

Mechanical (no load)

10,000,000

Miscellaneous

Mounting Position

Any

Mating Socket

SK-SQB11-DS

Enclosure

Opaque Polycarbonate

Weight

4.0 oz
113 g

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· 388 Series - Time Delay Relays - Wiring Diagram

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