Mounting and environment
Mount in any position — no derating needed for horizontal or inverted orientation. Rated for ambient temperatures from -40 °C to 75 °C, with humidity limits that derate above 55 °C (max 95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C). Halogen-free and silicon-free construction, which matters for clean-room or semiconductor-adjacent lines where outgassing can contaminate optics or sensitive surfaces. Sealable terminals (tamper-evident) for metering or safety circuits where you need to lock the setting.
Listed to IEC / EN 60898-1 (domestic and similar installations) and IEC / EN 60947-2 (industrial switchgear), plus UL 1077 and CSA C22.2 No.235 for North American acceptance. Overvoltage category III suits fixed installations with transient overvoltages up to 4 kV. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz — robust enough for machine-mounted panels near rotating equipment.