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GE 5KR234SS901A
Product Name: 5KR Series Miniature Circuit Breaker (MCB)
Product Introduction: The GE 5KR234SS901A is a compact industrial-grade miniature circuit breaker from GE’s 5KR/Sentron series, designed for overload and short-circuit protection in low-voltage distribution systems. With a rated current of 34 A, it is suitable for general industrial loads and commercial distribution.
Detailed content
Technical Specifications:
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Poles: 3-pole (3P)
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Rated Current: 34 A
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Rated Voltage: 480 V AC (UL 489 standard)
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Breaking Capacity: 10 kA at 480 V AC
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Trip Curve: Type C (magnetic trip range 5–10× rated current, i.e., 170–340 A)
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Rated Short-Circuit Breaking Capacity (Icu): 10 kA
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Rated Service Short-Circuit Breaking Capacity (Ics): 7.5 kA (75% Icu)
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Mechanical Life: 20,000 operations
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Electrical Life: 10,000 operations
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Operating Temperature: -25 °C to +70 °C
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Protection Rating: IP20
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Installation: 35 mm DIN rail mounting
Key Features: High 10 kA breaking capacity for reliable short-circuit protection; Type C trip curve balancing motor starting and general load protection; compact 18 mm single-module design saving distribution panel space; certified to UL, CSA, CE, CCC multi-national safety standards.
Materials: Housing: flame-retardant PC/PA66 engineering plastic (UL 94 V-0); Contacts: silver alloy (AgSnO₂); Arc chute: ceramic fiber arc-splitting grid; Trip mechanism: bimetallic strip (thermal) + electromagnetic coil (magnetic); Terminals: nickel-plated copper alloy.
Structural Features: Compact single-module width (18 mm); front-operated handle with three-position indication (ON/OFF/tripped); rear quick-connect terminals supporting 1–25 mm² wire; top/bottom DIN 35 rail clips; front visible trip indicator window.
Working Principle: Under normal operation, current passes through the bimetallic thermal element and electromagnetic coil. During overload, the bimetallic strip bends upon heating and reaches the set value to trigger the trip mechanism and disconnect the circuit. During short circuit, the high current generates sufficient magnetic force in the electromagnetic coil to instantly attract the armature, completing the break within 10 ms to protect downstream equipment.
Installation Requirements: Standard 35 mm DIN rail mounting; terminal torque 3.5 N·m (copper wire) / 2.5 N·m (aluminum wire); maintain ≥ 5 mm heat dissipation spacing between adjacent breakers; distribution box must have good ventilation with ambient temperature not exceeding +70 °C.
Application Scenarios: Industrial distribution panels, commercial building distribution, data centers, OEM equipment distribution, lighting distribution.
