Siemens Industrial Controls 3RH1921-1EA20 Contact
The Siemens 3RH1921-1EA20 is a high-performance SIRIUS auxiliary switch block designed for veteran contractors and electrical technicians. This side mount auxiliary contact features a 2NO (Normally Open) configuration, specifically engineered for seamless lateral integration with SIRIUS 3RT1 contactors and 3RH1 control relays. Built to withstand rigourous industrial environments, it supports frames from sizes S0 to S12, providing consistent feedback and interlocking signaling for motor control circuits. The screw terminal design ensures a vibration-resistant, IP20 protected connection capable of handling operational currents up to 6A at 230V AC-15. With a mechanical endurance rating of 10 million cycles, this 2-pole auxiliary contactor block is the standard for reliable system expansion without increasing the footprint of the main contactor. Whether you are managing interlocking logic or remote status indicators, this DIN EN 50005 compliant switch provides the high contact reliability (1 faulty operation per 100 million at 17V/1mA) required for advanced automation tasks.
- Universal SIRIUS Compatibility: Engineered to fit 3RT1 power contactors and 3RH1 relays across S0, S2, S3, S6, S10, and S12 frame sizes.
- Efficient Lateral Mounting: Tool-free, snap-on installation on the side of the unit preserves valuable front-facing rail space.
- Robust Electrical Ratings: Rated for an insulation voltage of 500V and a surge voltage resistance of 6kV for maximum circuit integrity.
- Precision Switching: Equipped with two instantaneous Normally Open (NO) contacts for immediate control circuit feedback.
- Environmental Resilience: Operational range from -25°C up to +60°C, suitable for high-heat industrial panels.
Common Questions
Can I mount this block on both sides of a 3RT1 contactor?
Yes, for the sake of symmetry and maximizing control points, you can mount one 3RH1921-1EA20 on the left and another on the right side of the main unit. This is the first lateral mounting block position.
Is this switch compatible with the newer SIRIUS 3RT2 or 3RH2 series?
No, this specific part is designed for the 3RT1 and 3RH1 lines. For 3RT2/3RH2 (Size S00-S3) contactors, you would typically utilize the 3RH29 series auxiliary blocks.
What wiring gauge is recommended for the screw terminals?
Technicians should use solid or stranded copper wire between 0.5 mm² to 2.5 mm². Finely stranded wire with core end processing (ferrules) is recommended for high-vibration applications.
This item is not eligible for free shipping.
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: $28.01
-65%$28.01
$9.80Siemens Industrial Controls 3RH1921-1EA20 Contact
The Siemens 3RH1921-1EA20 is a high-performance SIRIUS auxiliary switch block designed for veteran contractors and electrical technicians. This side mount auxiliary contact features a 2NO (Normally Open) configuration, specifically engineered for seamless lateral integration with SIRIUS 3RT1 contactors and 3RH1 control relays. Built to withstand rigourous industrial environments, it supports frames from sizes S0 to S12, providing consistent feedback and interlocking signaling for motor control circuits. The screw terminal design ensures a vibration-resistant, IP20 protected connection capable of handling operational currents up to 6A at 230V AC-15. With a mechanical endurance rating of 10 million cycles, this 2-pole auxiliary contactor block is the standard for reliable system expansion without increasing the footprint of the main contactor. Whether you are managing interlocking logic or remote status indicators, this DIN EN 50005 compliant switch provides the high contact reliability (1 faulty operation per 100 million at 17V/1mA) required for advanced automation tasks.
- Universal SIRIUS Compatibility: Engineered to fit 3RT1 power contactors and 3RH1 relays across S0, S2, S3, S6, S10, and S12 frame sizes.
- Efficient Lateral Mounting: Tool-free, snap-on installation on the side of the unit preserves valuable front-facing rail space.
- Robust Electrical Ratings: Rated for an insulation voltage of 500V and a surge voltage resistance of 6kV for maximum circuit integrity.
- Precision Switching: Equipped with two instantaneous Normally Open (NO) contacts for immediate control circuit feedback.
- Environmental Resilience: Operational range from -25°C up to +60°C, suitable for high-heat industrial panels.
Common Questions
Can I mount this block on both sides of a 3RT1 contactor?
Yes, for the sake of symmetry and maximizing control points, you can mount one 3RH1921-1EA20 on the left and another on the right side of the main unit. This is the first lateral mounting block position.
Is this switch compatible with the newer SIRIUS 3RT2 or 3RH2 series?
No, this specific part is designed for the 3RT1 and 3RH1 lines. For 3RT2/3RH2 (Size S00-S3) contactors, you would typically utilize the 3RH29 series auxiliary blocks.
What wiring gauge is recommended for the screw terminals?
Technicians should use solid or stranded copper wire between 0.5 mm² to 2.5 mm². Finely stranded wire with core end processing (ferrules) is recommended for high-vibration applications.
This item is not eligible for free shipping.
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 3RH1921-1EA20 is a high-performance SIRIUS auxiliary switch block designed for veteran contractors and electrical technicians. This side mount auxiliary contact features a 2NO (Normally Open) configuration, specifically engineered for seamless lateral integration with SIRIUS 3RT1 contactors and 3RH1 control relays. Built to withstand rigourous industrial environments, it supports frames from sizes S0 to S12, providing consistent feedback and interlocking signaling for motor control circuits. The screw terminal design ensures a vibration-resistant, IP20 protected connection capable of handling operational currents up to 6A at 230V AC-15. With a mechanical endurance rating of 10 million cycles, this 2-pole auxiliary contactor block is the standard for reliable system expansion without increasing the footprint of the main contactor. Whether you are managing interlocking logic or remote status indicators, this DIN EN 50005 compliant switch provides the high contact reliability (1 faulty operation per 100 million at 17V/1mA) required for advanced automation tasks.
- Universal SIRIUS Compatibility: Engineered to fit 3RT1 power contactors and 3RH1 relays across S0, S2, S3, S6, S10, and S12 frame sizes.
- Efficient Lateral Mounting: Tool-free, snap-on installation on the side of the unit preserves valuable front-facing rail space.
- Robust Electrical Ratings: Rated for an insulation voltage of 500V and a surge voltage resistance of 6kV for maximum circuit integrity.
- Precision Switching: Equipped with two instantaneous Normally Open (NO) contacts for immediate control circuit feedback.
- Environmental Resilience: Operational range from -25°C up to +60°C, suitable for high-heat industrial panels.
Common Questions
Can I mount this block on both sides of a 3RT1 contactor?
Yes, for the sake of symmetry and maximizing control points, you can mount one 3RH1921-1EA20 on the left and another on the right side of the main unit. This is the first lateral mounting block position.
Is this switch compatible with the newer SIRIUS 3RT2 or 3RH2 series?
No, this specific part is designed for the 3RT1 and 3RH1 lines. For 3RT2/3RH2 (Size S00-S3) contactors, you would typically utilize the 3RH29 series auxiliary blocks.
What wiring gauge is recommended for the screw terminals?
Technicians should use solid or stranded copper wire between 0.5 mm² to 2.5 mm². Finely stranded wire with core end processing (ferrules) is recommended for high-vibration applications.
This item is not eligible for free shipping.
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.
