The 5SV4342-0KL: Mounts on standard DIN rail (REG) in any orientation. The 72 mm width (4 modular units) fits standard panel cutouts. IP20 protection applies once the distribution board is installed and conductors connected — not rated for open-panel exposure to dust or moisture. Silicon-free construction suits environments where outgassing must be avoided (e.g., adjacent to sensitive contacts or coatings).
Thermal Derating & Ambient Limits
Rated 25 A continuously from 40 °C up to 60 °C ambient. At 65 °C it derates to 23.3 A; at 70 °C to 17.6 A. The I²t withstand of 58 000 A²·s gives the let-through energy the device can survive under fault conditions.
Installation & Wiring Notes
The installation depth is 70 mm — verify enclosure internal depth before panel layout. Overvoltage category III (distribution-board level). The 0.8 kA rated conditional short-circuit current per EN 60898 and IEC 61008-1 applies when backed by an upstream overcurrent device of that rating. For testing equipment, minimum supply voltage is 195 V.