Siemens Capacitor-Duty Contactors are heavy-duty switching devices tailored for reactive power control in industrial and commercial environments. Models range from compact 5 kVAR units to robust 100 kVAR-rated designs, with features like auxiliary contacts and durable build quality. Ideal for reliable power factor correction, they maintain precision switching for capacitor banks with optimum operational safety and longevity.
Description
Siemens Capacitor-Duty Contactors are engineered specifically for switching capacitor banks and reactive loads. They handle high inrush currents and frequent switching more reliably than standard contactors. These rugged contactors are ideal for applications involving power factor correction and demand-responsive reactive power control.
Specifications (Sample Models)
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3TS2110-0AP05-8K: 5 kVAR at 230 VAC, single NO, 3-pole configuration Electrihub
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3TS11100AR058K: 7 kVAR, 415 VAC coil, NO contact, compact dimensions 115×125×45 mm Moglix
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3TS12000AF058K: 12.5 kVAR, 110 VAC coil, rated current ~17.4 A Moglix
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3TS15000AF058K: 25 kVAR, 110 VAC coil, 2NO + 2NC auxiliary contacts, current ~34.8 A Moglix
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3TS2722-0AF05-8K: 40 kVAR, 110 VAC coil, 3-pole design Electrihub
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3TS17220AF058K: 50 kVAR, 110 VAC coil, 2NO + 2NC, current ~69.6 A Moglix
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3TS1400-0AP05-8K: 20 kVAR, 230 VAC coil Electrihub
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3TS1511-0AP05-8K: 25 kVAR, 230 VAC coil, 1NO + 1NC contacts Electrihub
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3MT70060JA126AN2: 60 kVAR, 220 VAC coil, 1NO + 2NC auxiliary contacts Electrihub
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3MT70080JA126AU0: 80 kVAR, 240 VAC coil, same auxiliary configuration Electrihub
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SIRIUS 3RT26371AP03: 75 kVAR @ 400 V, 230 VAC coil, 1NO + 1NC auxiliary, panel mounting aic.in
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Siemens Sinova 3MT series (e.g., 3MT70080/100): 80–100 kVAR, up to 240 VAC coils, rugged S2 housing Vashi Integrated Solutions Limited
Features
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Designed to withstand high reactive switching currents
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Available with auxiliary contacts (NO/NC) for status feedback
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Built-in damping/arc suppression features in some models
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Designed for frequent switching and high reliability
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Compliance with IEC 60947-4-1 standards Moglix+3Moglix+3Moglix+3
Applications
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Switching capacitor banks in power factor correction systems
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Industrial/commercial panel installations and distribution boards
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Systems requiring rapid reactive compensation to maintain voltage stability
Advantages
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Optimized for capacitive loads, ensuring longer service life
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High load-handling capability (up to 100 kVAR in industrial-grade models)
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Auxiliary contacts improve integration with automation systems
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Durable and compact — suitable for space-sensitive panels
Disadvantages
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Higher cost and complexity than standard motor-duty contactors
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Requires correct derating and sizing for high reactive loads
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Capacitor applications may still stress contacts over extensive cycles
