32 A at 400 V AC — what the ratings mean for fit
The GS1DBR4 is a 4-pole fuse switch disconnector body from the TeSys GS range, rated 32 A conventional free air thermal current (Ith) at 40 °C and 32 A in AC-23A/B duty at 400 V. AC-23 is the category for switching motor loads and other highly inductive circuits — the 32 A rating is the current the switch can make and break under those conditions, not just carry. Breaking capacity is 256 A at 400 V AC-23B; making capacity is 320 A at the same voltage. That means it can interrupt a fault current up to 256 A and close onto a fault up to 320 A, which covers most downstream short-circuit scenarios when the upstream fuse is sized correctly. Short-circuit withstand with BS-type fuses is 80 kA at 400 V — the switch body itself will hold under a fault up to that level as long as the associated fuse clears it. The making capacity under fault conditions is also rated 80 kA with BS fuses.
Panel integration and mounting
Mounts on a DIN rail or plate — the body dimensions are 96 mm wide (3.8 in) by 112 mm deep (4.4 in) by 98 mm high (3.9 in). That 96 mm width is standard for a 4-pole switch-disconnector in the TeSys GS family, so it fits existing panel cutouts and rail spacing without surprises. Power circuit terminals accept 6 to 25 mm² flexible copper, terminated with screw terminals torqued to 3.2 N·m. Control circuit terminals use the same torque. The IP20 rating with the terminal cover fitted means it's touch-safe for general industrial panel use but not for wet or dusty environments without an enclosure.
Standards and compliance
Designed to IEC 60947-3 (switch-disconnector standard), with fuse-links per IEC 60269-1 and IEC 60269-2. The body is rated for both AC and DC networks, with a rated insulation voltage (Ui) of 750 V AC and impulse withstand voltage (Uimp) of 8 kV. Fire resistance of the body material is 960 °C per IEC 60695-2-1 — a glow-wire test that confirms the housing won't propagate a flame under fault conditions. Protective treatment is TH (tropicalized), meaning it's treated against humidity and fungal growth for use in warm, damp environments.
Durability and operating range
Mechanical durability is 10,000 cycles; electrical durability is 1,500 cycles in AC-23A/B and 300 cycles in DC-23A/B. The DC rating is lower because DC arcs are harder to extinguish — if the application is DC, factor in the reduced cycle life. Ambient operating temperature range is -20 °C to +70 °C, which covers most indoor industrial panel conditions. The 32 A thermal current rating is at 40 °C ambient; derate above that per the standard IEC curve.
Sourcing and lifecycle
Sourced to order against the BOM quantity.