Siemens Auxiliary contact block, 2 contact, snap-on, 3TF6, 1NC + 1NO Part number 3TY7561-1AA00

Product Overview

The Siemens 3TY7561-1AA00 is an auxiliary switch block designed for use with Siemens contactors in size ranges 2 to 14. It provides one normally-open (NO) and one normally-closed (NC) instantaneous auxiliary contact and is used for status signalling, interlocking and control-circuit expansion. The compact snap-on design enables quick mounting directly onto compatible contactors.

Key Features

• Auxiliary switch block for Siemens contactors (sizes 2–14)
• Contact configuration: 1 NO + 1 NC instantaneous contacts
• Screw-terminal connection for secure wiring
• Rated insulation voltage up to 690 V
• Surge voltage resistance up to 6 kV
• High mechanical endurance (approx. 10 million operations)
• Snap-on mounting for fast installation or retrofitting

Technical Specifications

• Article Number: 3TY7561-1AA00
• Type: Auxiliary contact block
• Compatible Devices: Siemens contactors, sizes 2–14
• Contacts: 1 NO + 1 NC
• Rated Insulation Voltage (Ui): 690 V
• Rated Impulse Voltage (Uimp): 6 kV
• Connection Type: Screw terminals (0.5–2.5 mm²)
• Mechanical Durability: approx. 10 million switching cycles
• Ambient Operating Temperature: –25 °C to +55 °C
• Dimensions: approx. 70 mm height, 12 mm width

Compliance & Certifications

• Meets Siemens standards for industrial control accessories
• Suitable for integration in IEC-compliant control circuits

Applications

Used for feedback signalling, interlocking, and auxiliary switching in motor starters, control panels, automation systems and other industrial switchgear. Ideal for applications requiring compact and reliable extension of control and status contacts.