DPST Toggle Switch 4 Pin 15A 250VAC On/Off 2-Position — E-TEN 1221 (Car, Boat, Panel)

For a single control panel or one-off repair, 1 or 2 pcs is typically sufficient. For wiring multiple circuits in a boat, RV, or automotive build, ordering 4–10 pcs at once reduces per-unit cost and ensures you have spares on hand. In most cases, experienced builders order at least 2 extra to account for testing and future replacements.

DPST stands for Double Pole Single Throw. It controls two separate circuits simultaneously with one switch action. Each pole has an input and output terminal, giving you 4 pins total. This is commonly used when you need to switch both the live and neutral lines together for safety — for example, in 240VAC appliance circuits or dual-battery automotive setups.

Yes. The switch is rated 15A at 250VAC, which means it can generally handle 15A at 120VAC as well. Always verify the load current of your specific application does not exceed the rated amperage. For inductive loads (motors, pumps), derate by approximately 20–25% as a general rule.

This switch is designed for panel-mount use in cars, boats, and RVs. It is not inherently waterproof or IP-rated. For exposed outdoor or marine environments, we recommend installing it inside a weatherproof enclosure or using a sealed rubber boot cover over the actuator to protect the terminals from moisture and salt spray.

The E-TEN 1221 footprint typically requires a rectangular panel cutout of approximately 19.8mm × 12.9mm (≈0.78" × 0.51"). Always measure your existing panel opening or use a template before cutting new material. If you are replacing an existing E-TEN 1221 switch, it should drop in without modification.

On a standard 4-pin DPST switch, pins are arranged in two rows of two. Each row represents one pole: the top two pins are Pole 1 (input + output) and the bottom two are Pole 2 (input + output). Use a multimeter in continuity mode with the switch in the ON position to confirm which pins are connected before soldering or crimping your wires.

Yes. Toggle switches rated for AC loads generally perform well in low-voltage DC circuits (12V–24V) at equivalent or lower amperage. For automotive 12V DC use, this switch can typically handle the rated 15A load. Confirm your circuit's actual current draw — including startup surge for motors — before installation.