Reliable mechanical interlock 199‑MCA1 for reversing contactor assemblies
The 199‑MCA1 is a mechanical interlock manufactured by Allen‑Bradley. It is designed for use with reversing contactor assemblies, ensuring that both forward and reverse contactor coils cannot be engaged simultaneously. This interlock device supports voltages up to 600 VAC and provides a mechanical barrier to prevent electrical faults in motor reversing circuits.
Technical specifications
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Type: Mechanical interlock
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Application: Reversing contactor assemblies
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Maximum voltage rating: 600 VAC
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Mounting style: Direct attachment to contactor frames
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Construction: Rigid mechanical bar or link between contactor units
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Compatibility: Works with appropriate Allen‑Bradley reversing contactors
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Lifecycle status: Used / surplus availability
Key advantages
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Prevents simultaneous engagement of forward and reverse contactors
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Enhances safety and reduces risk of electrical shorts
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Simple mechanical design – no power required
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Reliable and durable in demanding environments
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Compact form factor for integration
Application and use cases of 199‑MCA1
This mechanical interlock is suitable for motor reversing control circuits, industrial machinery requiring forward/reverse switching, PLC control panels, motor control centers, and installations where preventing simultaneous coil activation is essential for safe operation.
About the manufacturer
Allen‑Bradley, part of Rockwell Automation, produces a wide range of industrial control equipment. Their mechanical interlocks, like the 199‑MCA1, form part of the safety and control accessories used alongside contactors and motor starters to enforce safe switching logic.