3RT1016-1AF01

What is this component used for in industrial control panels?

This is a 3‑pole power contactor used to switch loads such as three‑phase motors and resistive heaters from a low-power control signal. It is commonly used as the main switching element in motor starter circuits and automation panels.

What coil supply is required to operate it?

It uses an AC control coil rated at 110 V AC, 50/60 Hz. The coil operating range factor is 0.8–1.1 at 50 Hz and 0.85–1.1 at 60 Hz.

How many main poles and auxiliary contacts does it have as standard?

It has 3 main normally-open (NO) power poles and 1 built-in NO auxiliary contact.

What are the typical current ratings for common duties?

Typical ratings include 22 A at AC‑1 (400 V, 40 °C) and 9 A at AC‑3 (400 V). Always size according to the duty category and the application conditions.

What motor power can it switch?

For motor switching (AC‑3), it is typically suitable for 4 kW at 400 V, 4.5 kW at 500 V, and up to 5.5 kW at 690 V (application and installation conditions apply).

Is it suitable for switching DC loads?

It can be used for certain DC duties, but the permissible DC current depends strongly on the utilisation category and how many main current paths are placed in series. For example, at DC‑1 with 1 current path it is rated 2.1 A at 110 V, while series paths can increase the permissible current for some configurations.

What is the physical size and mounting method?

It is a compact S00 frame contactor. It supports screw mounting and snap-on mounting onto a 35 mm DIN rail (DIN EN 50022), and it is suitable for side-by-side mounting.

What are the approximate dimensions?

Typical overall dimensions are 45 mm wide, 57.5 mm high, and 72 mm deep.

What enclosure protection does it provide?

The front and terminal areas are rated IP20, meaning it is finger-safe when correctly installed in a panel, but it is not sealed against dust or water ingress.

What cable sizes can be connected to the terminals?

The screw terminals accept a range of conductor sizes. For the main and auxiliary terminals, typical ranges include solid or stranded conductors up to 2x (0.75–4 mm²) depending on the wiring arrangement, and AWG conductors up to 1x 12 (with certain combinations).

What environmental conditions is it designed for?

Typical operating ambient temperature range is -25 to +60 °C, with a maximum installation altitude of 2,000 m above sea level.

Does it have any guidance for short-circuit protection selection?

Yes. Typical upstream fuse guidance includes gL/gG 35 A for coordination type 1 and gL/gG 20 A for coordination type 2 for the main circuit, and gL/gG 10 A for the auxiliary switch circuit (selection must match the overall circuit design).

How much space should be left around it inside a panel?

A typical minimum side clearance to earthed/grounded parts is 6 mm.

What is the typical mechanical life expectancy?

Typical mechanical service life is around 30,000,000 switching cycles for the contactor itself. When auxiliary blocks or electronics-compatible auxiliary blocks are added, the typical mechanical life figure can be lower.

How much power does the coil consume?

Typical apparent pull-in power is 27 VA and apparent holding power is 4.4 VA for the AC coil.

Can it be used in a reversing motor starter?

Yes, it can be used as part of a reversing starter arrangement when paired with a second contactor and appropriate mechanical/electrical interlocking to prevent simultaneous closure.

Can additional auxiliary contacts be added?

This S00 contactor platform supports add-on auxiliary contact blocks. The standard unit includes 1 NO auxiliary contact, and additional signalling contacts can be added using compatible S00 accessories (verify configuration against your panel requirements).

What is the typical power loss through the main contacts under motor duty?

A typical figure is 0.7 W per conductor at AC‑3, 400 V, at the rated operating current.

How can I confirm it will suit my application before ordering?

Check the required coil voltage (110 V AC), duty category (such as AC‑3 for motors), load current, switching frequency, installation temperature, and panel layout constraints. If you need to reference the exact device in documentation, you can cite Siemens 3RT1016-1AF01 in your bill of materials.