3RT2545-1NB30

Siemens 3RT2545-1NB30 power contactor, size S3 80A
Siemens 3RT2545-1NB30 power contactor, size S3 80A

Siemens 3RT2545-1NB30 power contactor, SIRIUS 3RT25 series, Size S3, 4-pole 2NO+2NC main contacts, AC-3 rated current 80A, 37kW (400V), control voltage 20-33VAC/DC.

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Siemens 3RT2545-1NB30 power contactor, size S3 80A
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The Siemens 3RT2545-1NB30 power contactor is a Size S3, 4-pole design from the 3RT25 series. It features 2NO+2NC main contacts, an AC-3 rated current of 80A, and a rated power of 37kW (400V). It is suitable for starting and switching medium to large-sized motors. The Siemens 3RT2545-1NB30 controls voltages from 20-33VAC/DC and is equipped with 1NO+1NC auxiliary contacts (including a surge absorber). It has a mechanical life of 10 million cycles.

Core Product Advantages and Features
Size S3, 4-pole design
Main contacts are configured with 2NO+2NC, AC-3 rated current 80A, 37kW (400V).
Control voltage 20-33VAC/DC
Equipped with 1NO+1NC auxiliary contacts and built-in surge absorber protection.
Mechanical life of 10 million cycles
The insulation voltage is 1000V for the main circuit and 690V for the auxiliary circuit, making it durable and reliable.
Support polarity reversal
Suitable for applications involving motor polarity reversal and dual load switching.
project Specification
Product Type SIRIUS 3RT25 Series Electric Contactors
External dimensions (Size) S3
Pole/Main Contact Configuration 4 poles, 2NO + 2NC
AC-3 rated current 80 A
AC-3 Rated Power (400V) 37 kW
Control/coil voltage 20...33 V AC/DC
Auxiliary contact configuration 1 NO + 1 NC (includes surge absorber)
Rated insulation voltage Main circuit 1000V / Auxiliary circuit 690V
External dimensions (within the same series) 140mm (height) × 70mm (width) × 152mm (depth)
Weight (within the same series) Approximately 2.125 kg
Mechanical life 10 million times

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