3TC4817-0AP4

What type of electrical component is this?

This is a Siemens 3TC series contactor designed for switching DC loads. The 3TC4817-0AP4 is a size 4, 2-pole contactor with two normally open main contacts and a 230 V DC operating coil.

What is the rated operating current for DC switching?

It is rated at 75 A for DC-3 and DC-5 utilisation categories, including ratings at 220 V, 440 V, 600 V and 750 V DC when used according to the specified configuration.

What coil voltage does this contactor use?

The control coil is designed for 230 V DC operation. The coil has a closing power and holding power of 19 W.

How many main poles does it have?

It has 2 main poles, both configured as normally open contacts. There are no normally closed main contacts.

What auxiliary contacts are included?

The contactor includes an auxiliary switch arrangement identified as 22, meaning 2 normally open and 2 normally closed auxiliary contacts.

What are the typical applications for this contactor?

It is typically used in industrial DC control panels for switching DC motors and other direct current loads where DC-3 or DC-5 utilisation is required.

What are the operating power ratings?

For DC-3 and DC-5 operation, the contactor is rated at 6.5 kW at 110 V, 13 kW at 220 V, 27 kW at 440 V, 38 kW at 600 V and 45 kW at 750 V.

What is the rated insulation voltage?

The rated insulation voltage is 800 V. The maximum permissible voltage for protective separation between the coil and main contacts according to EN 60947-1 is 300 V.

What is the mechanical service life?

The typical mechanical service life is 10,000,000 operating cycles, both for the contactor itself and for the contactor with an added auxiliary switch block.

What ambient temperature range is suitable for operation?

The specified operating ambient temperature range is -25 °C to +55 °C. The storage temperature range is -50 °C to +80 °C.

What are the approximate dimensions?

The unit measures approximately 100 mm wide, 177.5 mm high and 184 mm deep.

How is the contactor mounted?

It is designed for screw fixing. The mounting position allows rotation of approximately +/-22.5° on a vertical mounting surface, and it may also be positioned standing on a horizontal mounting surface.

What terminal type does it use?

The main current circuit, auxiliary circuit and control circuit use screw-type terminals.

What degree of ingress protection does it have?

The standard protection class is IP00. With a suitable box terminal or cover fitted, the front protection level may be IP20.

What are the switching frequency limits?

The maximum operating frequency is 1,000 operations per hour for DC-1 and 600 operations per hour for DC-3 or DC-5.

What are the coil response times?

The specified closing delay is 90 to 380 ms, the opening delay is 17 to 28 ms, and the arcing time is 20 to 30 ms.

What short-circuit protection is specified for the main circuit?

For the main circuit, Siemens data specifies 2 x 3NA31 fuse links in series, rated at 160 A for type 1 coordination or 63 A for type 2 assignment at 750 V and 5 kA.

What auxiliary contact ratings are listed?

The auxiliary contacts are rated A600 / P600 according to UL. For AC-15 operation, they are rated at 5.6 A at 230 V, 3.6 A at 400 V and 2.5 A at 500 V.