1A Relays | McMaster-Carr

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	Input Voltage Input Voltage

	Maximum Overall Timing Maximum Overall Timing

	Switching Voltage Switching Voltage

120V AC

250V AC

90V DC

	Timer Relay Function Timer Relay Function

Delayed Start (Delay-on-
Make)

Delayed Switch-Off (Delay-on-
Break)

Interval

Repeat Cycle

Switch-On (Single-Shot)

	Timing Adjustment Style Timing Adjustment Style


DIP Switches	Potentiometer

	Number of Terminals Number of Terminals

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

1 Off (Normally Open) and 1
On (Normally Closed)

	Number of Circuits Controlled Number of Circuits Controlled

	Operation Type Operation Type

Solid State

	Relay Type Relay Type

	Timer

	Switching Current Switching Current	Show

	Switching Current Switching Current	Hide

	Minimum Overall Timing Minimum Overall Timing

	Wire Connection Type Wire Connection Type

	Quick-Disconnect Terminals

	Industry Designation Industry Designation

DPST-1NO/1NC

SPST-NO

	Mounting Location Mounting Location

Surface

Outlet Box

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Specifications Met Specifications Met

CE Marked

	Control Current Control Current

	Height Height

	Application Application

Power

	Width Width

	Mounting Hole Diameter Mounting Hole Diameter

0.17"

	Number of Mounting Holes Number of Mounting Holes

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52 Products

About Timer Relays

Choosing an Electrical Switch

With no moving parts, these solid state relays have an extended service life. Use the mounting hole to attach to a flat surface. A potentiometer (variable switch) adjusts the delay within the range.

For technical drawings and 3-D models, click on a part number.

Timer Relays
			Timing Range											Potentiometers
Number of Terminals	Input Voltage	Control Current, mA	No. of	Overall	Switching Current @ 120V AC	Ht.	Wd.	Dp.	Quick-Disconnect Tab Wd.	Features	Specifications Met		Each		Each
Delayed Start (Delay-on-Make)
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
2	12V AC/12V DC	21	1	0.05 sec.-1 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	000000	000000	00
2	12V AC/12V DC	21	1	0.25 sec.-5 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	12V AC/12V DC	21	1	0.5 sec.-10 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	12V AC/12V DC	21	1	3 sec.-60 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	12V AC/12V DC	21	1	15 sec.-300 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	12V AC/12V DC	21	1	30 sec.-10 min.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	24V AC/24V DC	10	1	0.05 sec.-1 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	24V AC/24V DC	10	1	0.25 sec.-5 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	24V AC/24V DC	10	1	0.5 sec.-10 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	24V AC/24V DC	10	1	3 sec.-60 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	24V AC/24V DC	10	1	15 sec.-300 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	24V AC/24V DC	10	1	30 sec.-10 min.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	000000000	00000	000000	00
2	120V AC/120V DC	4	1	0.05 sec.-1 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
2	120V AC/120V DC	4	1	0.25 sec.-5 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
2	120V AC/120V DC	4	1	0.5 sec.-10 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
2	120V AC/120V DC	4	1	3 sec.-60 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
2	120V AC/120V DC	4	1	15 sec.-300 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
2	120V AC/120V DC	4	1	30 sec.-10 min.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
2	24-240V AC/24-240V DC	10	1	1 sec.-1,023 sec.	1A	2"	2"	0.89"	0.25"	Potentiometer	UL Recognized Component	00000000	000000	000000	00
Delayed Switch-Off (Delay-on-Break)
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
5	120V AC	36	1	0.05 sec.-1 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	0000000	00000	000000	00
5	120V AC	36	1	0.25 sec.-5 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	0000000	00000	000000	00
5	120V AC	36	1	0.5 sec.-10 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	0000000	00000	000000	00
5	120V AC	36	1	3 sec.-60 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	0000000	00000	000000	00
5	120V AC	36	1	15 sec.-300 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	0000000	00000	000000	00
5	120V AC	36	1	30 sec.-10 min.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	0000000	00000	000000	00
7	12V DC	217	1	0.25 sec.-5 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	000000
7	12V DC	217	1	0.5 sec.-10 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
7	12V DC	217	1	3 sec.-60 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
Interval
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
5	120V AC	25	1	0.05 sec.-1 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
5	120V AC	25	1	0.25 sec.-5 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
5	120V AC	25	1	0.5 sec.-10 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
5	120V AC	25	1	3 sec.-60 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
5	120V AC	25	1	15 sec.-300 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
5	120V AC	25	1	30 sec.-10 min.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
Repeat Cycle
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
7	120V AC	36	1	0.05 sec.-1 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
7	120V AC	36	1	0.25 sec.-5 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
7	120V AC	36	1	0.5 sec.-10 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
7	120V AC	36	1	3 sec.-60 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
7	120V AC	36	1	15 sec.-300 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
7	120V AC	36	1	30 sec.-10 min.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
Switch-On (Single-Shot)
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
5	120V AC	36	1	0.05 sec.-1 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
5	120V AC	36	1	0.25 sec.-5 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
5	120V AC	36	1	0.5 sec.-10 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
5	120V AC	36	1	3 sec.-60 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
5	120V AC	36	1	15 sec.-300 sec.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
5	120V AC	36	1	30 sec.-10 min.	1A	2"	2"	0.88"	0.25"	Potentiometer	UL Recognized Component	00000000	00000	000000	00
7	12V DC	217	1	0.25 sec.-5 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
7	12V DC	217	1	0.5 sec.-10 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000
7	12V DC	217	1	3 sec.-60 sec.	1A	2"	2"	0.88"	0.25"	__	UL Recognized Component	00000000	00000	00000000	00000

Two-Hand Safety Switches

It takes two hands to activate these switches, minimizing the risk of accidental equipment start up. A complete system requires two switches, one safety relay, and two outlet boxes.

Switches meet OSHA requirements and ANSI standards for machine operator safety. They're rated IP64 for protection from splashing water.

For technical drawings and 3-D models, click on a part number.

Switches

Switch

						Actuator
Input Voltage	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Material	Color	Switching Current @ Voltage	Dia.		Each
24V DC	2	1 Off (Normally Open) and 1 On (Normally Closed)	Springs Back (Momentary)	4	DPST-1NO/1NC	Plastic	Gray	1 A @ 250 V AC/90 V DC	2 3/8"	00000000	0000000
120V AC	2	1 Off (Normally Open) and 1 On (Normally Closed)	Springs Back (Momentary)	4	DPST-1NO/1NC	Plastic	Gray	1 A @ 250 V AC/90 V DC	2 3/8"	00000000	000000

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About Timer Relays

Choosing an Electrical Switch

Long-Life Surface-Mount Timer Relays

Two-Hand Safety Switches