Specifications General Type: Auxiliary Contact Module / Control Relay Module Series: ABB 3HNA Model: 3HNA021752-004 Application: Auxiliary signaling, interlocking, and control in low-voltage electrical systems Mounting: Snap-on or panel mount compatible with ABB contactors Electrical Characteristics Rated Operational Voltage (Ue): 24–400 V AC/DC Rated Operational Current (Ie): 5–10 A (depending on contact type) Contact Configuration: 2 NO + 2 NC (typical for 004 variant) Insulation Voltage (Ui): 500 V Electrical Life: 100,000–500,000 operations at rated load Mechanical & Construction Housing Material: Thermoplastic / industrial-grade polymer Actuator / Terminal Type: Screw or plug-in terminals Mechanical Life: >1,000,000 operations Dimensions: Compact modular design for DIN rail mounting Protection Class: IP20 (panel mounted) Environmental Conditions Operating Temperature: –25 °C to +55 °C Storage Temperature: –40 °C to +70 °C Humidity: 0–95% RH, non-condensing Standards & Certifications Standards Compliance: IEC 60947-5-1, IEC 60947-4-1 Safety & EMC: CE marked, industrial-grade EMC compliance Approvals: UL, CSA depending on variant Features Modular and compact design for auxiliary control applications Reliable NO/NC contacts for signaling, interlocking, and control Easy snap-on or panel mounting Compatible with ABB low-voltage contactors and control devices