Manufacturer: Siemens

Product Brand: SIRIUS

Type: Auxiliary Contact Block / Auxiliary Switch Block

Model Number (MNR): 3TX40102A

Suitability for Use: Contactor Relay and Power Contactor

Insulation Voltage (Ui): 690 V

Rated Operational Current (Ie):

• 1.8 A @ AC-15, 690 V
• 2.5 A @ AC-15, 500 V
• 3.8 A @ AC-15, 400 V
• 5.6 A @ AC-15, 230 V

Rated Impulse Withstand Voltage (Uimp): 6 kV

Standard: IEC 947, VDE 0660, BS 4794

Contact: 1 Normally Open (NO)

Protection Class: IP20

Ambient Temperature During Operation: -25 / +55°C

Mounting Type: Snap-On Mounting

Dimensions (W x H x D): 12 x 70 x 52 mm

The Siemens SIRIUS 3TX40102A auxiliary contact block is designed to deliver dependable signaling and control in industrial automation systems. With a compact snap-on design, it supports fast installation on contactor relays and power contactors. Engineered to meet international standards, it offers high operational reliability, electrical durability, and safety compliance under harsh conditions.