McMaster-Carr

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	Input Voltage Input Voltage

24V AC

120V AC

240V AC

12V DC

24V DC

	Switching Voltage Switching Voltage

24V AC

120V AC

	Number of Circuits Controlled Number of Circuits Controlled

	Industry Designation Industry Designation

SPST-NO

DPST-1NO/1NC

DPST-NO

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

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

2 Off (Normally Open)

	Number of Terminals Number of Terminals

	Control Power Control Power

6.5VA

	Switch 2nd Signal Starting Position Switch 2nd Signal Starting Position

1 On (Normally Closed)

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

2 On (Normally Closed)

	Specifications Met Specifications Met

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20 Products

Sequenced Latching Relays

These relays switch through a series of different circuit configurations every time they receive an input voltage. The input voltage latches them in position, so they donâ€™t require a constant voltage to stay switched. Use them to control motors, pumps, and lighting. The covered terminals prevent contact with live connections. Mount to 35 mm DIN rail. Also known as step relays.

1 Circuit Controlledâ€”SPST-NO
Switch Starting Position	Input Voltage	Control Power	Switching Current @ 24V AC/120V AC	Max. Switching Voltage	hp @ Switching Voltage	Ht.	Wd.	Dp.	Specifications Met		Each
With 4 Terminals
1st Signalâ€”1 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed)	24V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	000000
1st Signalâ€”1 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed)	120V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”1 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed)	240V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”1 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed)	12V DC	5W	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”1 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed)	24V DC	5W	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
2 Circuits Controlledâ€”DPST-1NO/1NC
With 6 Terminals
1st Signalâ€”1 Off (Normally Open) and 1 On (Normally Closed) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open)	24V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”1 Off (Normally Open) and 1 On (Normally Closed) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open)	120V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”1 Off (Normally Open) and 1 On (Normally Closed) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open)	240V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”1 Off (Normally Open) and 1 On (Normally Closed) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open)	12V DC	5W	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”1 Off (Normally Open) and 1 On (Normally Closed) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open)	24V DC	5W	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
2 Circuits Controlledâ€”DPST-NO
With 6 Terminals
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”2 On (Normally Closed)	24V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”2 On (Normally Closed)	120V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”2 On (Normally Closed)	240V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”2 On (Normally Closed)	12V DC	5W	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”2 On (Normally Closed)	24V DC	5W	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open) 3rd Signalâ€”2 On (Normally Closed)	24V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open) 3rd Signalâ€”2 On (Normally Closed)	120V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open) 3rd Signalâ€”2 On (Normally Closed)	240V AC	6.5VA	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open) 3rd Signalâ€”2 On (Normally Closed)	12V DC	5W	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000
1st Signalâ€”2 Off (Normally Open) 2nd Signalâ€”1 On (Normally Closed) and 1 Off (Normally Open) 3rd Signalâ€”2 On (Normally Closed)	24V DC	5W	16A	277V AC	1/2 hp @ 120 V AC	3.3"	0.7"	2.4"	UL Recognized C-UL Recognized CE Marked	00000000	00000

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