Siemens 3RH2911-2HA22 SIRIUS Auxiliary Switch 2NO+2NC 690V

The Siemens 3RH2911-2HA22 is a SIRIUS front-mounted auxiliary switch with 2 NO + 2 NC instantaneous contacts, designed to snap onto the front of 3RT2 contactors and 3RH2 contactor relays. Spring-loaded terminals and a 690 V insulation voltage suit it for a wide range of industrial control circuits.

Technical specifications:

• MLFB: 3RH2911-2HA22
• Manufacturer: Siemens
• Product line: SIRIUS
• Contact arrangement: 2 NO + 2 NC (instantaneous)
• Terminal type: spring-loaded
• Rated insulation voltage: 690 V AC (pollution degree 3)
• Surge voltage resistance: 6 kV
• Operational current AC-12 at 24 V / 230 V: 10 A
• Operational current AC-15 at 230 V: 6 A; at 690 V: 1 A
• IP rating (front): IP20
• Mounting: snap-on front
• Compatible with: 3RT2.1, 3RT2.2, 3RT2.3, 3RT2.4, 3RH2
• Mechanical service life: 10,000,000 operating cycles
• Electrical endurance at AC-15, 230 V: 200,000 operating cycles
• Conductor cross-section: 0.5-2.5 mm² (solid/stranded); AWG 20-14
• Dimensions (W x H x D): 36 x 41.5 x 47.7 mm
• Net weight: 60 g
• Operating temperature: -25 to +60 °C
• Storage temperature: -55 to +80 °C

Features and benefits:

• Mirror contact function per IEC 60947-4-1 (with 3RT2) enables safety monitoring of contactor state
• Positively driven operation per IEC 60947-5-1 ensures reliable contact state indication
• 10 million cycle mechanical service life reduces maintenance frequency
• Spring-loaded terminals accept two conductors per terminal (2x 0.5-2.5 mm²) for fast, tool-free wiring
• Contact reliability of 1 faulty switching per 100 million operations at 17 V / 1 mA

Applications:

• Extending auxiliary contacts on 3RT2 power contactors in motor control centers
• Feedback and interlock circuits in motor starter assemblies
• Safety-relevant mirror contact monitoring in machine control panels
• Auxiliary control circuits in industrial switchgear up to 690 V

Compliant with IEC 60947-4-1 (mirror contact) and IEC 60947-5-1 (positively driven operation). Part of the Siemens SIRIUS 3RH29 range.

Also known as: Siemens 3RH2911-2HA22, SIRIUS 3RH29 front auxiliary switch 2NO+2NC.