Siemens 3TC44170BF0 DC Contactor – 32 A, 2-Pole, 110 V AC Coil

The Siemens 3TC44170BF0 Contactor is a Size 2, 2-pole DC contactor designed for switching suitable DC loads in industrial electrical and automation applications. It has a 32 A DC-3/DC-5 operational current rating and uses an AC-operated coil rated at 110 V, 50 Hz / 132 V, 60 Hz. The contactor also includes 2 NO + 2 NC auxiliary contacts, making it suitable for control, interlocking and signalling functions in industrial circuits. Siemens' official product portal identifies the product as 3TC4417-0BF0 and confirms its Size 2, 2-pole, DC-3/DC-5 configuration.

The Siemens 3TC44170BF0 is part of the Siemens 3TC contactor family for switching DC voltage and is particularly useful where a DC load needs to be switched using an AC control supply. Siemens documentation lists the 3TC4417 series for DC-3/DC-5 applications and identifies the 32 A class for this frame size.

What Is Siemens 3TC44170BF0 Used For?

The Siemens 3TC44170BF0 DC contactor is designed for switching and controlling suitable DC loads in industrial systems. Unlike a conventional AC motor contactor, the 3TC series is specifically intended for DC switching applications, making correct selection important when dealing with DC circuits.

The product has two main poles and can be used in applications where the DC load requires two switching paths. Its built-in 2 NO + 2 NC auxiliary contacts provide additional switching points for control logic, electrical interlocking, status indication and signalling.

The 110 V AC, 50 Hz coil allows the contactor to be operated from a compatible AC control circuit, while the main contacts are intended for suitable DC loads.

Key Benefits

• 32 A DC-3/DC-5 contactor for suitable DC switching applications
• 2-pole main contact configuration
• 110 V AC, 50 Hz coil
• Also supports 132 V AC, 60 Hz coil operation
• 2 NO + 2 NC auxiliary contacts
• Siemens 3TC DC contactor family
• Size 2 contactor design
• Suitable for industrial DC load switching
• Screw connection for the main circuit
• Useful for industrial control and automation systems
• Suitable for OEM machinery and electrical panels
• Useful for replacement and maintenance applications

The Siemens datasheet confirms the AC control supply values, auxiliary-contact arrangement and DC-3/DC-5 characteristics.

Siemens 3TC44170BF0 for DC Switching Applications

The Siemens 3TC44170BF0 32 A DC contactor is suitable for industrial applications where a DC load needs to be switched through an electrically operated contactor.

The 3TC family is specifically designed for switching DC voltage, and the 3TC4417 variant is listed by Siemens for DC-3 and DC-5 applications.

Its two main contacts can provide the required switching arrangement for compatible DC circuits, while the auxiliary contacts can be integrated into control and monitoring circuits.

This makes the contactor relevant for industrial equipment where DC motors, DC loads, control circuits or other suitable DC switching applications are involved.

Before installation, the DC voltage, load current, utilization category and switching requirements should be checked against the complete application requirements.

Auxiliary Contacts: 2 NO + 2 NC

One of the useful features of the 3TC44170BF0 is its integrated 2 NO + 2 NC auxiliary-contact configuration.

These auxiliary contacts can be used for:

• Electrical interlocking
• Contactor status feedback
• Control logic
• Indication circuits
• Alarm circuits
• Sequence-control applications
• Automation control systems

The Siemens datasheet confirms 2 normally open and 2 normally closed auxiliary contacts for this model.

Typical Applications

The Siemens 3TC44170BF0 contactor can be considered for suitable applications such as:

• Industrial DC motor control
• DC switching panels
• Industrial automation systems
• OEM machinery
• DC power-control systems
• Machine-control equipment
• Industrial control cabinets
• Electrical interlocking systems
• DC load switching
• Manufacturing equipment
• Industrial maintenance and replacement applications
• Automation and control systems

The exact application should always be evaluated against the DC load characteristics and the contactor's applicable utilization category.

Siemens 3TC44170BF0 for OEM & Control Panels

OEM machine builders and panel manufacturers can consider the Siemens 3TC44170BF0 when designing control systems that require a 32 A DC contactor with an AC control coil.

The combination of 2-pole main contacts and 2 NO + 2 NC auxiliary contacts can be useful where both load switching and control-system feedback are required.

For replacement applications, customers should compare the existing contactor's complete part number, DC load requirements, coil voltage, auxiliary-contact arrangement, mounting dimensions and terminal configuration before ordering.

Buy Siemens 3TC44170BF0 in India

Looking to buy Siemens 3TC44170BF0 in India? SB Smart supplies Siemens industrial electrical products for OEMs, panel builders, contractors, maintenance teams and industrial customers.

If you are searching for a Siemens 3TC44170BF0 supplier in India, Siemens 32 A DC contactor dealer in Delhi NCR, Siemens 110 V AC coil DC contactor supplier in Gurgaon, or Siemens 3TC contactor supplier in Faridabad, SB Smart can assist with product availability and quotation requirements.

SB Smart provides delivery across India, including Delhi, Gurgaon, Faridabad, Noida, Punjab, Chandigarh, Mumbai, Pune, Ahmedabad, Jaipur, Bengaluru, Chennai, Hyderabad and Kolkata, along with other major cities.

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Why Buy from SB Smart?

SB Smart supplies a broad range of Siemens contactors, DC contactors, motor-control products, industrial switchgear, automation components and electrical products.

The product range supports requirements from OEM manufacturers, panel builders, system integrators, contractors and industrial maintenance teams.

For individual replacement requirements, bulk orders or industrial projects, customers can contact SB Smart for product availability and quotation assistance.

For customers searching for a Siemens 3TC44170BF0 DC contactor in India, SB Smart can assist with industrial procurement requirements.

Frequently Asked Questions

Q1. What is Siemens 3TC44170BF0?

The Siemens 3TC44170BF0 is a Size 2, 2-pole DC contactor designed for suitable DC-3/DC-5 switching applications, with a 110 V AC 50 Hz / 132 V AC 60 Hz control coil.

Q2. What is the current rating of Siemens 3TC44170BF0?

The specified operational current is 32 A for the relevant DC switching configuration.

Q3. What coil voltage does Siemens 3TC44170BF0 use?

The contactor has an AC control supply of 110 V at 50 Hz and 132 V at 60 Hz.

Q4. How many main poles does the Siemens 3TC44170BF0 have?

The 3TC44170BF0 has 2 main poles.

Q5. What auxiliary contacts are included?

The contactor has 2 NO + 2 NC auxiliary contacts.

Q6. Is Siemens 3TC44170BF0 a DC contactor?

Yes. It belongs to the Siemens 3TC contactor family for switching DC voltage and is specified for DC-3 and DC-5 applications.

Q7. What is the frame size of Siemens 3TC44170BF0?

The contactor is Size 2.

Q8. Where can I buy Siemens 3TC44170BF0 in India?

You can enquire about the Siemens 3TC44170BF0 from SB Smart for product availability, quotation and delivery requirements across India.