GAZ125ET8 - 4P CHANGEOVER SWITCH 125A ENCLOSED

Why Choose the GAZ125ET8?

Lovato GAZ125ET8 is a four-pole line changeover switch (I-0-II) in a UL/CSA Type 4/4X non-metallic enclosure, engineered for reliable source selection up to 690 V AC. Rated 125 A, the compact, IP65-protected assembly suits industrial and commercial panels. The SKU GAZ125ET8 delivers dependable switching performance with straightforward installation and clear I-0-II actuation.

Backed by Ui 1000 V and Uimp 8 kV, this GAZ series unit withstands demanding conditions. It offers 30,000 mechanical and AC21A electrical cycles, conditional short-circuit current 50 kA (with gG125 fuse), and a broad -25 to +55 °C operating range. Generous 4–70 mm² terminals tighten to 5–6 Nm, in an enclosure measuring 280x220x172 mm.

Key Benefits

• Four-pole I-0-II operation for safe mains or backup source selection.
• 125 A rating; AC23A up to 55 kW at 400 V.
• IP65 and UL/CSA Type 4/4X enclosure for harsh environments.
• High endurance: 30,000 mechanical and AC21A electrical switching cycles.
• Strong short-circuit capability: 50 kA with gG125 protection fuse.
• Wide cable range 4–70 mm² with secure 5–6 Nm terminals.
• Compact 280x220x172 mm footprint simplifies panel and wall mounting.

Technical Specification

• Product type designation: GAZ
• Number of poles: 4
• Operating voltage type: AC
• Ith (IEC): 125 A
• Rated insulation voltage Ui (IEC/EN): 1000 V
• Rated impulse withstand voltage Uimp: 8 kV
• Operating current Ie AC21A 400 V: 125 A
• Operating current Ie AC21A 500 V: 125 A
• Operating current Ie AC21A 690 V: 125 A
• Operating current Ie AC22A 400 V: 125 A
• Operating current Ie AC22A 500 V: 125 A
• Operating current Ie AC22A 690 V: 125 A
• Operating current Ie AC23A 400 V: 125 A
• Operating current Ie AC23A 500 V: 100 A
• Operating current Ie AC23A 690 V: 47 A
• Power dissipation per pole (max): 6.3 W
• Rated operational power AC23A 400 V: 55 kW
• Rated operational power AC23A 690 V: 45 kW
• Conditional short-circuit current (rms): 50 kA
• Short-circuit protection fuse: gG125
• Making capacity AC23A 400 V: 1250 A
• Breaking capacity AC23A 400 V: 1000 A
• Mechanical life: 30000 cycles
• Electrical life AC21A: 30000 cycles
• Terminal tightening torque: 5 to 6 Nm
• Conductor section (IEC): 4 to 70 mm²
• Operating temperature: -25 to +55 °C
• Storage temperature: -40 to +70 °C
• Max altitude: 3000 m
• IP degree (frontal): IP65
• IP degree of protection: IP65
• Pollution degree: 3

What’s Included

• Lovato GAZ125ET8 changeover switch in UL/CSA Type 4/4X enclosure
• Installation and safety information

Applications

• Mains-to-generator changeover for critical circuits
• Dual power source selection in industrial control panels
• Distribution boards requiring IP65/Type 4X protected switching
• Motor load switching within AC23A ratings

Safety note: Install and commission only by a qualified electrician. Isolate all supplies before work, use gG125 fuse for short-circuit protection, and follow IEC/EN 60947 and local regulations.