3101, Thomas Black Master Switch (On-Off)

• 3101
• Black Master Switch
• On-Off
• 12 Volts
• 20 Amps
• SPST (Single Pole, Single Throw)

Thomas Fan Switch (Low/High-Off): 3133

Thomas Rocker Switches

What is difference between SPST and SPDT?
SPST simply mean single pole, single throw. The product controls one circuit with one On position. SPDT means that it is a single pole double throw which means it has two ON positions.

What is the difference between SPDT and DPDT switch?
A DPDT switch usually has two (ON-ON) or three (ON-OFF-ON) positions. The pair of SPDT switches operates together with four circuits with two independent circuit systems. The circuits can be switched on at the same time. In this situation, both appliances in the same circuits will be powered when the switch is on.

What are the 4 types of switches?
The types of switches are classified into four types namely:

• NGR (Neutral Grounding Resistor)
• SPST (Single Pole, Single Throw)
• DPDT (Double Pole Double Throw)
• DPST (Double Pole, Single Throw)

Cross#'s: 52003101, 5200-3101, 3101-USBP