The Lovato GX1666U is a GX series voltmeter switch designed for selecting phase‑neutral and phase‑phase voltages in three‑phase systems. With a 16 A Ith rating and U form for front mounting, it features a factory‑fitted black handle and a compact 48X48mm front plate. SKU GX1666U delivers dependable measurement selection within the GX square‑shaped contact block architecture.
Built for robust panel integration, this voltmeter switch offers IP65 frontal protection and a rated impulse withstand voltage of 6 kV. It operates from -25 to +55 °C and stores from -40 to +70 °C. Conformity includes IEC/EN/BS 60947 and 61058 series, plus UL60947-4-1 and CSA C22.2 n° 14, with a Sustainability certification for added assurance.
Key Benefits
Switching diagram 66 selects phase-neutral and phase-phase voltages.
16 A Ith rating ensures reliable meter switching duty.
U front mounting with black handle for straightforward operation.
Compact 48X48mm front plate optimises valuable panel space.
IP65 frontal protection resists dust and water ingress.
Conforms to IEC/EN/BS, UL and CSA standards for compliance.
What’s Included
Lovato GX1666U voltmeter switch (GX series)
48X48mm front plate pre-fitted
Black handle fitted for front mounting
Product datasheet and installation guidance
Applications
Selecting phase-neutral and phase-phase voltages in three-phase systems
Industrial control panels and switchboards
Generator, UPS, and distribution enclosures
Maintenance, testing, and commissioning panels
Technical Specifications
HS Code
85365080
Product type designation
GX16
Rated impulse withstand voltage Uimp
6 kV
Operating temperature
-25 to +55 °C
Storage temperature
-40 to +70 °C
IP degree (frontal)
IP65
Frequently Asked Questions
What switching function does the GX1666U provide?
It uses diagram 66 to select phase-neutral and phase-phase voltages.
What is the thermal current rating?
The IEC conventional free air thermal current Ith is 16 A.
Is it suitable for front mounting and what size is the plate?
Yes. It is U - Front mounting with black handle and a 48X48mm front plate.
What protection and environmental ratings are specified?
The frontal protection is IP65, with operating temperature -25 to +55 °C and storage -40 to +70 °C.
Which standards and approvals does it meet?
It conforms to IEC/EN/BS 60947-1/3/5-1 and IEC/EN/BS 61058-1, plus UL60947-4-1 and CSA C22.2 n° 14.
Safety note: Installation and operation should be performed by qualified personnel. Isolate all power sources before work and observe the stated ratings, standards, and temperature limits.
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
Priority sourcing and supply support
Flexible payment terms for qualifying organisations
Support for engineering, maintenance, and operations
500 +
Stock lines ready to ship
1,000 +
Same day dispatches
3500 +
Customers supported
28
Trusted Manfacturers
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...