The Schneider Electric GS1QQBR3 is a TeSys GS fuse switch disconnector body — a 3-pole, 400 A rated switch-disconnector for AC and DC networks, designed to accept BS-type fuses (sizes B1 through B4). It provides visible isolation and overcurrent protection in a single enclosure, rated for motor and resistive loads under AC-23A/B and DC-23A/B duty classes. The headline rating is 400 A at 400 V AC-23B, which means it can safely switch motor loads drawing up to 400 A — the AC-23B duty covers occasional switching of motors during normal operation. For DC applications, it carries 315 A at 440 V (poles not juxtaposed) under DC-23B. The conventional free air thermal current (Ith) is also 400 A at 40 °C, confirming the body's continuous current capability. Breaking capacity is 3200 A at 400 V AC-23B, and making capacity is 4000 A at the same voltage — these figures define the fault it can interrupt and the peak it can close onto without damage. Short-circuit withstand is rated at 80 kA, meaning the body can survive a fault of that magnitude when protected by the correct BS fuses.
Where It's Used and How It Mounts
This is a panel-mount component for industrial power distribution and motor control centers. Power connections are via bars or screw terminals accepting 185–240 mm² flexible cable — sized for the 400 A continuous rating. Control circuit and power circuit torque is 25 N·m on screw terminals. The body is IP20 with the terminal cover fitted (per IEC 60529), meaning finger-safe but not protected against water ingress — suitable for dry indoor enclosures. The TH protective treatment indicates tropicalization for humid environments. Fire resistance is tested to 960 °C for the body and 850 °C for the fuse cover per IEC 60695-2-1.
If you need a current-production equivalent, the TeSys GS range continues with similar form-factor bodies, but pin-compatibility and fuse-holder dimensions must be verified against your existing panel layout. The GS1Q short-name prefix indicates this is a specific variant within the GS1 family; a direct swap without checking the mounting footprint and fuse-clip arrangement is not advised. Standards compliance remains valid for existing installations: the body is certified to IEC 60269-1 (fuse requirements), IEC 60947-3 (switch-disconnectors), and IEC 60269-2 (BS fuse supplementary requirements). These standards don't expire with the product's production status, so the part is still acceptable for maintenance replacements in systems originally designed to these norms.
Rated operational power spans from 132 kW at 400 V AC-23B up to 400 kW at 500 V AC-23A, depending on voltage and duty class. Electrical durability is 1000 cycles for AC-23A/B and 200 cycles for DC-23A/B; mechanical durability is 10,000 cycles — this is a robust industrial switch, not a daily-operating contactor. Dimensions: 271 mm wide, 205 mm high, 149 mm deep. These are the body dimensions without the handle throw arc — allow clearance for the right-side operating handle swing when planning panel layout.