Siemens Auxiliary switch, changeover contacts, type HQ, 7mm

Product Overview

The Siemens 3VA9978-0AA12 is a high-performance auxiliary switch with changeover contacts Type HQ (7mm) designed as an internal accessory for 3VA4, 3VA5, and 3VA6 series molded case circuit breakers. This compact, professional-grade switching component features a 2-slot Type HQ design with 300VAC voltage rating and 3A current capacity, providing reliable auxiliary contact functionality for SENTRON 3VA circuit breaker systems in demanding industrial and commercial electrical installations where precise signaling and control are essential.

Key Features

• Type HQ Changeover Contacts: Compact 7mm width design with changeover contact configuration for versatile switching applications
• 300VAC/3A Rating: Professional-grade electrical specifications with 300VAC voltage rating and 3A current capacity
• 2-Slot Compact Design: Space-efficient 2-slot configuration optimizing panel space utilization
• Extended Compatibility Range: Designed for 3VA4, 3VA5, and 3VA6 series molded case circuit breakers
• Color & Mechanical Coding: Failsafe installation system prevents assembly errors and ensures consistent compatibility
• Non-Electronic Design: Standard mechanical auxiliary switch for reliable long-term operation
• Serbian Manufacturing: Quality construction ensuring reliable performance in demanding electrical environments

Technical Specifications

• Contact Type: Changeover contacts Type HQ
• Voltage Rating: 300VAC
• Current Rating: 3A
• Width: 7mm
• Slot Configuration: 2-slot compact size
• Dimensions: 65.2mm H x 34.5mm W x 7.1mm D
• Net Weight: 0.028 kg
• Packaging Dimensions: 175.00 x 100.00 x 8.00 mm
• Packaging Quantity: 1 piece
• Country of Origin: Serbia
• EAN: 4042949014058
• UPC: 804766323300

Applications

This auxiliary switch is particularly suitable for:

• Industrial electrical distribution systems requiring reliable auxiliary contacts
• Commercial building electrical installations with 3VA4/5/6 circuit breakers
• Motor control and automation applications requiring status indication
• Circuit breaker monitoring and signaling systems
• Remote control and automation circuits
• Process control and manufacturing systems
• Building management system integration
• Electrical panel signaling and indication applications
• Emergency shutdown and safety circuit applications
• Load monitoring and protection systems

Compliance & Certifications

• RoHS Compliance: Compliant since January 1, 2016
• WEEE Directive: Subject to take-back obligations under directive 2012/19/EU
• REACH Regulation: No current information on SVHC substances from supply chain
• Export Control: AL: N / ECCN: N
• Product Class: B - Return restricted, please contact your Siemens partner/contact

Product Classification

• eClass: 27-37-13-92 (versions 12, 14), 27-37-92-01 (versions 6-9.1)
• ETIM: EC002498 (versions 7-9)
• UNSPSC: 39-12-11-03
• Product Group: 5386
• Group Code: P360

Download existing graphical data for this product:

• Technical Datasheet (PDF)
• Product Information Page
• Operating Instructions Manual
• SENTRON Product Catalog