3RT2016-2BB44

Compared to versions in the same series that only have one set of auxiliary contacts, the 2BB44 provides four sets of auxiliary contacts (2NO + 2NC), which can simultaneously drive multiple interlocking or indicator circuits, reducing the cost of adding auxiliary contact sockets.

Share To

Siemens 3RT2016-2BB44 24VDC Contactor AC-3 9A 4kW 2 Normally Open 2 Normally Closed

Product Positioning

The 3RT2016-2BB44 is the version with the most auxiliary contacts selected in this study: the control coil is 24V DC, and it provides 2 sets of normally open (NO) and 2 sets of normally closed (NC) auxiliary contacts, for a total of 4 sets. Compared to versions in the same series with only one set of auxiliary contacts, it can simultaneously meet the needs of multiple signal sets such as operation indication, fault feedback, and interlock protection, and can complete more complex control circuit designs without the need for additional auxiliary contact socket modules. The main circuit maintains the S00 housing and AC-3 9A/4kW/400V rating consistent with the 3RT2016 family. In addition, the AC-1 (resistive load) rated current can reach 22A/400V, showing that it also has a certain margin in non-motor resistive load applications. The terminals also adopt a spring clip design, eliminating the need for screw fastening, which is suitable for panel wiring personnel to quickly install. Due to the large number of auxiliary contacts, it is particularly suitable for automated production lines or air conditioning unit control boxes that require multiple independent signal outputs.

Core Product Advantages and Features

4 sets of auxiliary contacts (2 NO + 2 NC)

It provides two sets of normally open and two sets of normally closed contacts at a time, which can simultaneously meet the needs of multiple signals such as operation indication, fault feedback and interlock protection.

24V DC standard coil

Control voltage 24V DC, compatible with general PLCs or 24V DC control circuits, 3 sets of normally open main contacts for direct motor drive.

AC-1 rated margin

The AC-1 resistive load has a rated current of up to 22A/400V, and still has a certain current margin when used for non-motor resistive loads.

Spring-loaded quick-connect terminal

Both the main circuit and auxiliary contacts are spring-clamp type, requiring no screws for fastening, making them suitable for dense wiring operations with multiple signal circuits.

project	Specification
Main circuit structure	3-pole normally open (3NO) is suitable for direct starting of three-phase motors.
AC-3 Rated Current/Power	9 A / 4 kW (400V)
Maximum rated operating voltage	690V AC 50/60Hz
Case size	S00 (45 mm wide x 70 mm high x 73 mm deep, consistent across all versions)
Mechanical life	Approximately 30 million cycles.
Installation method	35mm standard DIN rail mounting
Auxiliary contact type	2 NO + 2 NC (4 groups in total)
Coil voltage/type	24V DC
Terminal type	Cage clamp type, wire 0.5~4mm²/AWG 20~12
AC-1 rated current	22 A (400V, resistive load)
Main contact type	3 NO (Normal Open)
Protection level	IP20
Compliant with regulations	RoHS compliant

Recommend

3RT2016-2BF41

Unlike most 24V DC versions in the same series, the 2BF41 has a coil voltage of 110V DC, making it suitable for applications with existing 110V DC control circuits. The main contacts and terminal specifications are consistent with the family.

3RT2016-2AP02

Siemens SIRIUS 3RT2016-2AP02 electromagnetic contactor, 3-pole main contacts with 1 set of normally closed auxiliary contacts, 230V AC 50/60Hz coil, spring-loaded quick-connect, AC-3 rated 9A/4kW/400V, S00 standard frame size.

3RT2016-2AN21

The Siemens SIRIUS 3RT2016-2AN21 is a 3-pole electromagnetic contactor with an S00 frame. It features a 220V AC 50/60Hz coil with one set of normally open (NO) auxiliary contacts, spring-loaded terminals for screwless quick crimping, AC-3 rated 9A/4kW/400V, and IP20 protection rating.