Home › Manufacturers › Siemens › 3RT2028-1FB40

Siemens

Siemens 3RT2028-1FB40 38A DC Contactor with Diode

Siemens 3RT2028-1FB40 3-Pole Power Contactor with Diode

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number3RT2028-1FB40

Type Power Contactor

AC-3e/AC-3 Rating 38 A

Power Rating 18.5 kW / 400 V

Poles 3

Get a price for 3RT2028-1FB40

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

24V DC coil Integrated diode for surge suppression 38A AC-3e/AC-3 rating 1 NO + 1 NC auxiliary contacts Screw terminals Size S0

Product description

The Siemens 3RT2028-1FB40 is a 3-pole power contactor designed for AC-3e/AC-3 applications, rated at 38A and 18.5 kW at 400V. This model features a 24V DC coil and comes with a built-in diode combination for surge suppression, protecting downstream control circuitry. It includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contact.

This contactor is well-suited for applications requiring DC control and integrated surge protection, simplifying wiring and reducing the need for external components. It's commonly used in motor control circuits, automation systems, and power distribution where a 24V DC control voltage is present and coil protection is desired. The S0 size ensures a compact footprint in control panels.

Stanlo Automation, a veteran-owned distributor of surplus industrial parts, offers the Siemens 3RT2028-1FB40. We ensure you receive quality, reliable components to maintain your automation systems and keep your operations running efficiently.

Technical specifications

Type	Power Contactor
AC-3e/AC-3 Rating	38 A
Power Rating	18.5 kW / 400 V
Poles	3
Coil Voltage	24 V DC
Diode Combination	Integrated
Auxiliary Contacts	1 NO + 1 NC
Terminals	Screw
Size	S0

Common applications

Motor control

DC control systems

Automation

Control panels

Industrial machinery

Power switching

Compatible systems

Siemens Sirius 3RT Series Control systems with 24V DC control voltage and integrated protection requirements

Also known as

Siemens 3RT2028 DC Contactor Diode 3RT2028 Contactor 24V DC Siemens Sirius

Replaces / compatible with

Suitable for replacing Siemens 3RT2028 models with 24V DC coils and integrated surge suppression. Always verify specific requirements.

Technical note

Expert tip

The integrated diode significantly reduces coil "back-EMF" transients, allowing for direct connection to PLC outputs without an external suppressor, provided the PLC can handle the low leakage current.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

Does the Siemens 3RT2028-1FB40 have surge suppression?

Yes, the Siemens 3RT2028-1FB40 features an integrated diode combination that acts as a surge suppressor for the coil. This helps protect control circuits from voltage spikes when the coil is de-energized.