Siemens MPCBs (Motor Protection Circuit Breakers) are compact, integrated devices that combine overload, short-circuit, and manual disconnect protection in one. Available in a range of sizes and current capacities across the 3RV and 3VS Sirius product lines, they deliver reliable motor protection with high breaking capacities and modular flexibility, enabling safe and space-efficient control panel designs.
Description
A Siemens MPCB combines the functionality of a motor starter and a protective breaker in one compact unit. It provides combined overload, short-circuit, and manual disconnect protection for electric motors. Designed for easy panel integration, these devices save space and enhance safety while simplifying motor control circuits.
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Specifications
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3RV1011-1AA10
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Rating: 1.1–1.6 A, Class 10 overload release, 100 kA breaking capacity (size S00)
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3RV1011-1JA10
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Rating: 7–10 A, same class 10 release, size S00
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3VS1300-1MM00
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Rating: 10–16 A, 6 kA breaking capacity, includes 1NO + 1NC auxiliary contact
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3VS1300-0MN00
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Rating: 20 A, 6 kA breaking capacity, no auxiliary contact
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3RV2031-4RA10
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Range: 70–80 A, Class 10, size S2
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3RV2042-4MB10
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Range: 80–100 A, Class 20 release, 100 kA breaking capacity, size S3
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3VS16001MN00
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Range: 16–25 A, 6 kA capacity, includes auxiliary contact
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3RV2332-4RC10
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Rating: 80 A, 100 kA breaking capacity, size S2
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3RV2031-4SB10
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Rating: 9.5–14 A, 65 kA breaking capacity, size S2
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3RV2011-1GA10
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Rating: 4.5–6.3 A, Class 10 release, 100 kA capacity, size S00
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3RV2042-4YA10
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Rating: 75–93 A, S3, stanyard release version
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Features
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Integrates thermal-magnetic protection for overload and short-circuit detection
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Offers manual ON/OFF disconnect for safe isolation
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Features size scaling (S00 to S3) for current handling flexibility
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Optional auxiliary contacts for motor status signaling
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Compact DIN-rail or panel-ready design, ideal for compact panels
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High breaking capacity (6 kA to 100 kA), scalable with load demands
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Applications
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Protecting motors in automation, motors, and pumping systems
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Ideal for panel-mounted motor protection in industrial distribution boards
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Replacing bulky starter-plus-overload setups with a single compact device
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Used in both industrial and plant environments for reliable motor safeguarding
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Advantages
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Combines starter and protection in one unit, reducing panel complexity
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Scalable high breaking capacities
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Sleek modular design with flexible mounting options
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Can integrate with contactors and auxiliary elements for sophisticated control
Disadvantages
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Requires careful selection of current range and class for correct motor protection
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Higher upfront cost compared to standalone overload relays
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Need exact coordination with upstream protection and motor load