E-TEN1021 PLC Controller: Advanced Industrial Automation Solution
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What is the E-TEN1021 toggle switch?
Note on the listing title: the queue titles this article a "PLC Controller" — the part is a toggle switch. The E-TEN1021 is a metal-body ON/OFF toggle switch rated 15 A at 250 VAC: a single-pole single-throw break-before-make switch with two screw terminals, a threaded nickel-plated bushing for panel mounting (lock washer and nut fitted), a chrome lever, and the black OFF / red ON legend plate around the bushing. The body printing reads E-TEN1021 · 15A 250VAC · ON · OFF. This is the panel switch class that runs machine mains directly — heaters, lamps, small motors, power feeds — where a rocker would do the job but a toggle gives the positive hand feel and the visual state at a distance. The photo set shows a bulk lot: two boxes of switches plus ten laid out loose; the intake record books one unit at the recorded purchase price, and both counts are stated as recorded. All 5 photos and 1 video below show these exact switches.
Part details
| Field | Value |
|---|---|
| Model | E-TEN1021 |
| Type | Panel-mount toggle switch, SPST ON-OFF |
| Rating | 15 A / 250 VAC (body print) |
| Terminals | 2 screw terminals with solder/screw lugs |
| Mounting | Threaded nickel bushing, hex nut and lock washer fitted; round legend plate OFF (black) / ON (red) |
| Actuator | Chrome-plated metal lever |
| Quantity | Bulk lot shown (two boxes plus loose units); intake record books one — both as recorded |
Values are read from the switch body print and the photographed construction in the photo set.
Why the humble toggle still runs the panel
The toggle switch survives in industrial service for mechanical reasons, not nostalgia. The lever's throw is long and positive — an operator can confirm state by feel through gloves, and the position reads across a shop floor, which the red-ON/black-OFF legend plate on this unit makes explicit. The 15 A / 250 VAC rating is the practical headline: it is enough to switch a 3 kW heater, a bank of lamps or a small single-phase motor directly, no contactor needed for the light-duty loads that fill most control panels. The two screw terminals take ring or spade lugs or bare wire, the threaded bushing mounts through a standard round hole with the nut and lock washer shipped in place, and the metal housing grounds itself through the bushing when it lands on a metal panel. Replacements are one-size: the E-TEN1021 format is the industry's common denominator, so a failed switch is a two-minute swap with no re-wiring. The bulk lot photographed here — boxes of them, plus ten loose with the body print legible — reads as a production run into stock; the intake record books a single unit, and the page documents both counts as recorded.
Photos and video
All images below are original KOEED warehouse photos. Click any photo to view it full size.
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