UKT48213P40 Tesla UKT3-40A Changeover Switch Panel Mounted 4 Pole 3 Position 1-0-2 40 Amp

Description

Tesla UKT3-40A. 4 Pole 40A Panel Mount Changeover Switch. 1-0-2. 690V AC.

The Tesla UKT3-40A panel-mount changeover switch is a 4 pole 40 amp rotary cam switch with a 1-0-2 switching function — designed for mounting directly through a panel cutout in an existing switchboard or enclosure. The rotary operator provides Source 1 / Off / Source 2 selection, with clearly engraved 1 0 2 position markings on the front face. 690V AC rated. Compliant with VDE, DIN, IEC, UL, and CSA standards. Sold individually.

• Tesla UKT3 Series — Panel Mount Changeover Switch
• 4 pole — switches all 4 conductors simultaneously
• 40A rated current
• Switching function: 1-0-2 — Source 1 / Off / Source 2
• Front operated rotary switch — engraved 1 0 2 position markings
• Panel mount — fits through standard panel cutout in existing switchboard or enclosure
• No enclosure included — switchboard or enclosure mounting required
• Nominal operational voltage: 690V AC
• Rated frequency: 50/60Hz
• Compliant with VDE, DIN, IEC, UL, and CSA standards
• Sold individually

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What the Tesla UKT3-40A Panel Mount Changeover Switch Does

A changeover switch transfers a connected electrical load between two separate supply sources. In the 1-0-2 configuration, position 1 connects the load to Source 1, position 0 is the off position with both sources disconnected, and position 2 connects the load to Source 2. The rotary operator must pass through the off position when switching between sources, preventing both supplies from being connected simultaneously and providing a clear isolation point during the changeover.

The panel-mount version of the UKT3 changeover switch is the cam switch mechanism only — it mounts directly through a cutout in an existing switchboard door, panel face, or enclosure, with the rotary operator presented on the front face and the terminal block accessible from behind the panel. This is the appropriate choice when integrating the switch into an existing switchboard or custom-built enclosure. For standalone surface or wall mounting without an existing enclosure, the equivalent enclosed version (UKT3-E40) is factory-mounted in a polycarbonate Fibox enclosure.

The 40A 4-pole rating makes the UKT3-40A suited to single-phase and three-phase changeover applications at 40A load current — generator changeover installations, dual-supply arrangements, and circuit switching in commercial and industrial switchboards where a higher current rating than the 20A version is required. The 4-pole configuration simultaneously switches all four conductors for complete source isolation during changeover.

The Tesla UKT3 panel-mount range covers 20A (P20), 40A (P40), 63A (P63), and 100A (P100) in the 4-pole 1-0-2 configuration. The equivalent enclosed versions (E20, E40, E63, E100) are factory-mounted in polycarbonate Fibox enclosures for direct surface or wall mounting.

Q: What is the difference between the UKT3-P40 (panel mount) and the UKT3-E40 (enclosed)?
A: Both use the same UKT3 cam switch mechanism with the same 40A, 4-pole, 1-0-2 switching function. The UKT3-P40 is the switch mechanism only — it mounts through a panel cutout in an existing switchboard or enclosure. The UKT3-E40 is factory-mounted in a polycarbonate Fibox enclosure (IP54 body, IP66 front) for direct surface or wall installation. Choose P40 for integration into an existing switchboard; choose E40 for standalone surface mounting.

Q: What is the difference between the UKT3-P20 and the UKT3-P40?
A: Both are 4-pole, 1-0-2, 690V AC panel-mount changeover switches using the same UKT3 cam switch mechanism. The UKT3-P20 is rated at 20A and suits lighter changeover applications. The UKT3-P40 is rated at 40A for higher current loads. Always select a changeover switch rated at or above the maximum load current of the circuits being switched.

Q: Why use a 4-pole changeover switch for a single-phase installation?
A: A 4-pole switch simultaneously switches all four conductors including the neutral. In generator changeover applications, switching the neutral is important to prevent the generator neutral and grid neutral from being bonded together, which can cause issues in some generator earthing configurations. Consult a licensed electrician to confirm the correct pole configuration for your specific installation.

Warranty

This product is backed by an extended manufacturer warranty - click here for details.