072739 PKZM0-10 Motor-protective circuit-breaker, 4 kW, 6.3 - 10 A

Key Features

• ✔ Protects motors up to 4 kW, and therefore ensures reliable operation
• ✔ Adjustable overload release range: 6.3–10 A, so it adapts to different setups
• ✔ Three-pole design with screw terminals, which makes wiring secure
• ✔ Phase-failure sensitivity (IEC/EN 60947-4-1, VDE 0660), and consequently prevents damage
• ✔ Temperature compensation from –25 °C to +55 °C, and thus suitable for harsh environments
• ✔ Compact DIN rail mounting (IEC/EN 60715), so installation is simplified
• ✔ Certified to UL, CSA, CE, IEC standards, which guarantees compliance worldwide

Electrical Ratings

• ✔ Motor rating (AC-3): 2.2 kW at 230 V, 4 kW at 400–500 V, 7.5 kW at 690 V
• ✔ Rated operational current (Ie): 10 A, and therefore suitable for medium loads
• ✔ Rated operational voltage: up to 690 V AC
• ✔ Rated impulse withstand voltage: 6000 V AC, which ensures durability
• ✔ Short-circuit release: max 155 A, so protection is enhanced
• ✔ Mechanical lifespan: 100,000 operations, and consequently long service life
• ✔ Electrical lifespan: 100,000 operations, so performance remains consistent
• ✔ Operating frequency: 40 operations/hour

Additional Details

• ✔ Shock resistance: 25 g mechanical (IEC/EN 60068-2-27), therefore suitable for rugged use
• ✔ Finger and back-of-hand proof (EN 50274), so safety is enhanced
• ✔ Explosion safety category: ATEX dust-ex protection, Ex II (2) GD
• ✔ Terminal capacity: 1 × (1–6 mm²), 2 × (1–6 mm²), AWG 18–10
• ✔ Tightening torque: 1 Nm (control circuit), 1.7 Nm (main cable)
• ✔ Ambient operating temperature: –25 °C to +55 °C (open), –25 °C to +40 °C (enclosed)
• ✔ Storage temperature: –40 °C to +80 °C
• ✔ Altitude: up to 2000 m

Typical Applications

• ✔ Motor protection for pumps, fans, and conveyors, and consequently reduces downtime
• ✔ Industrial automation panels requiring compact breakers
• ✔ HVAC systems with small and medium motors, so energy efficiency improves
• ✔ Water treatment and filtration plants, and therefore safer operations
• ✔ General electrical installations needing overload protection