Siemens Industrial Controls 3RH1921-1CA01 Switch Block
The Siemens 3RH1921-1CA01 Switch Block is a rugged, front-mounted auxiliary contact designed for high-reliability feedback and interlocking in commercial HVACR and industrial control systems. Engineered for the Sirius 3RT1 contactor series, this single-pole 1 NC auxiliary contact (Normally Closed) provides a critical signal path for monitoring contactor status or safe interlocking of secondary loads. With screw-clamp terminals and a 10A thermal current rating, this block ensures secure low-voltage signaling across an insulation voltage of 690V. The snap-on design allows for tool-free installation directly onto the front face of frame sizes S0 through S12 motor starters. Designed for industrial controls with a mechanical service life of 10 million cycles, this Siemens 3RH1921-1CA01 prevents common circuit failures by utilizing mirror contact logic when paired with compatible 3RT power contactors, making it a staple for technicians maintaining complex motor control centers.
Key Benefits- Direct Front-Mounting: Snaps onto the center of 3RT10, 3RT12, and 3RT14 series contactors without additional hardware or tools.
- Industrial Durability: Rated for a 200,000-cycle electrical endurance at AC-15 (230V), suited for high-frequency switching environments.
- Standardized Compliance: Meets DIN EN 50005 specifications for precise terminal designation and technical compatibility.
- Flexible Expansion: Single-pole footprint allows for stacking up to four auxiliary blocks on one contactor to customize your control logic.
- Is the 3RH1921-1CA01 compatible with 3RT2 contactors? No, this part is specifically designed for the older 3RT1 (Sirius Classic) series. For the newer 3RT2 (Sirius Innovation) modules, you typically require the 3RH29 series auxiliary blocks.
- What is the maximum voltage for the auxiliary circuit? This block is rated for a 690V insulation voltage and 6kV surge resistance, though typical control circuits operate at 24V or 120V AC/DC.
- Can I mount this on the side of the contactor? No, the 1CA01 is a front-mount design. For lateral mounting requirements, use the 3RH1921-1EA or similar side-mount variants.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $10.69
-65%$10.69
$3.74Siemens Industrial Controls 3RH1921-1CA01 Switch Block
The Siemens 3RH1921-1CA01 Switch Block is a rugged, front-mounted auxiliary contact designed for high-reliability feedback and interlocking in commercial HVACR and industrial control systems. Engineered for the Sirius 3RT1 contactor series, this single-pole 1 NC auxiliary contact (Normally Closed) provides a critical signal path for monitoring contactor status or safe interlocking of secondary loads. With screw-clamp terminals and a 10A thermal current rating, this block ensures secure low-voltage signaling across an insulation voltage of 690V. The snap-on design allows for tool-free installation directly onto the front face of frame sizes S0 through S12 motor starters. Designed for industrial controls with a mechanical service life of 10 million cycles, this Siemens 3RH1921-1CA01 prevents common circuit failures by utilizing mirror contact logic when paired with compatible 3RT power contactors, making it a staple for technicians maintaining complex motor control centers.
Key Benefits- Direct Front-Mounting: Snaps onto the center of 3RT10, 3RT12, and 3RT14 series contactors without additional hardware or tools.
- Industrial Durability: Rated for a 200,000-cycle electrical endurance at AC-15 (230V), suited for high-frequency switching environments.
- Standardized Compliance: Meets DIN EN 50005 specifications for precise terminal designation and technical compatibility.
- Flexible Expansion: Single-pole footprint allows for stacking up to four auxiliary blocks on one contactor to customize your control logic.
- Is the 3RH1921-1CA01 compatible with 3RT2 contactors? No, this part is specifically designed for the older 3RT1 (Sirius Classic) series. For the newer 3RT2 (Sirius Innovation) modules, you typically require the 3RH29 series auxiliary blocks.
- What is the maximum voltage for the auxiliary circuit? This block is rated for a 690V insulation voltage and 6kV surge resistance, though typical control circuits operate at 24V or 120V AC/DC.
- Can I mount this on the side of the contactor? No, the 1CA01 is a front-mount design. For lateral mounting requirements, use the 3RH1921-1EA or similar side-mount variants.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Siemens 3RH1921-1CA01 Switch Block is a rugged, front-mounted auxiliary contact designed for high-reliability feedback and interlocking in commercial HVACR and industrial control systems. Engineered for the Sirius 3RT1 contactor series, this single-pole 1 NC auxiliary contact (Normally Closed) provides a critical signal path for monitoring contactor status or safe interlocking of secondary loads. With screw-clamp terminals and a 10A thermal current rating, this block ensures secure low-voltage signaling across an insulation voltage of 690V. The snap-on design allows for tool-free installation directly onto the front face of frame sizes S0 through S12 motor starters. Designed for industrial controls with a mechanical service life of 10 million cycles, this Siemens 3RH1921-1CA01 prevents common circuit failures by utilizing mirror contact logic when paired with compatible 3RT power contactors, making it a staple for technicians maintaining complex motor control centers.
Key Benefits- Direct Front-Mounting: Snaps onto the center of 3RT10, 3RT12, and 3RT14 series contactors without additional hardware or tools.
- Industrial Durability: Rated for a 200,000-cycle electrical endurance at AC-15 (230V), suited for high-frequency switching environments.
- Standardized Compliance: Meets DIN EN 50005 specifications for precise terminal designation and technical compatibility.
- Flexible Expansion: Single-pole footprint allows for stacking up to four auxiliary blocks on one contactor to customize your control logic.
- Is the 3RH1921-1CA01 compatible with 3RT2 contactors? No, this part is specifically designed for the older 3RT1 (Sirius Classic) series. For the newer 3RT2 (Sirius Innovation) modules, you typically require the 3RH29 series auxiliary blocks.
- What is the maximum voltage for the auxiliary circuit? This block is rated for a 690V insulation voltage and 6kV surge resistance, though typical control circuits operate at 24V or 120V AC/DC.
- Can I mount this on the side of the contactor? No, the 1CA01 is a front-mount design. For lateral mounting requirements, use the 3RH1921-1EA or similar side-mount variants.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
