Siemens 3RH1921-1CA01 Auxiliary Contact Block
Siemens 3RH1921-1CA01 Auxiliary Contact Block
- It allows for the monitoring, signaling, and interlocking of electrical circuits in industrial, commercial, and residential applications. It typically consist of one or more additional sets of contacts that are mechanically linked to the main contacts of the contactor or relay. These contacts can be normally open (NO), normally closed (NC), or a combination of both.
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An Auxiliary Contact Block is a modular electrical component designed to provide additional contacts for control, signaling, and interlocking purposes in conjunction with contactors, relays, or circuit breakers.
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It allows operators and control systems to monitor the status of main devices and perform automation or safety functions without interrupting the primary power circuit.
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Manufactured from high-quality insulating and conductive materials, the auxiliary contact block ensures reliable electrical performance, low contact resistance, and long mechanical life. Its compact and modular design allows easy mounting, removal, or replacement, offering flexibility for system upgrades or maintenance.
Product Specification:
| during storage | -55 … +80 °C | |
| during operation | -25 … +60 °C | |
| mechanical service life (switching cycles) typical | 10Â 000Â 000 | |
| electrical endurance (switching cycles) at AC-15 at 230 V typical | 200Â 000 | |
| contact reliability of auxiliary contacts | 1 faulty switching per 100 million (17 V, 1 mA) | |
| insulation voltage with degree of pollution 3 at AC rated value | 690Â V | |
| surge voltage resistance rated value | 6Â kV | |
