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Mechanical SPDT and DPDT Switches

Switch & Sensor Specifications

Moniteur selects the industry's best mechanical switches to handle a wide variety of applications, meeting the tough demands of today's process industries. A full range of mechanical snap-acting switches is available, as shown in the table below.

Specifications - Mechanical Switches

Switch Type

Switch Code

AC Rating

DC Rating

Form

SPDT (Cherry)

1

15A - 250V

2.5A - 24V

C

Gold Plated SPDT (Prism)

3

1A - 120V

1A - 24V

C

DPDT (ITW)

4

10A - 250V

7A - 24V

CC

SPDT (C&K)

C

15A - 250V

0.5A - 125VDC
0.25A - 250VDC

C

Mechanical Switch Selection
Mechanical SPDT switches are the most common switch used due to their low cost and proven reliability for general purpose applications. In addition to transmitting valve position, the switch’s high amp rating can control a relay, or other plant devices such as pumps or motors.
Mechanical DPDT are used for simultaneous switching functions when two independent signals must operate in tandem. An example is when one switch sends a low level signal back to the control room, and a second functions controls a relay or another device. Warning: Moniteur DOES NOT recommend that two SPDT switches be used in lieu of one DPDT for any application.
Gold plated Mechanical switches are used in low current, low voltage (primarily DC) applications. Gold plated switch contacts assure signal stability at extremely low current and voltages, and are often used as a low cost alternative in Intrinsically Safe systems
Moniteur Devices, Inc. 36 Commerce Road, Cedar Grove, NJ 07009 T 973.857.1600 F 973.857.7289