3RT2016-2FB42

The F-shaped coil is 24V DC with a built-in suppression diode. It has 3 sets of normally open main contacts and 1 set of normally closed auxiliary contacts. The AC-3 rated value is 9A/4kW, and it is compatible with circuit breaker feedback or interlock protection circuits.

Share To

Siemens 3RT2016-2FB42 24VDC Diode Coil Contactor AC-3 9A 4kW 1 Normally Closed

Product Positioning

The 3RT2016-2FB42 belongs to the Siemens SIRIUS "F" series of coils. The control coil is 24V DC and has a built-in suppressor diode to absorb the back electromotive force generated when the coil is de-energized, reducing electrical interference to surrounding control components. The main circuit inherits the 3RT2016 family specifications, with 3 normally open main contacts in an S00 housing, rated at AC-3 9A/4kW/400V. The auxiliary contacts follow Siemens SIRIUS ordering code conventions, with the suffix 42 corresponding to one normally closed (NC) group, suitable for use as feedback signals for circuit breaks, interlocking protection, or abnormal alarm signals. Spring-clamp terminals allow for screwless, quick wiring of both the main circuit and auxiliary contacts, making it particularly suitable for mass assembly on production lines and future maintenance replacements, while also reducing the risk of poor contact caused by inconsistent tightening torque.

Core Product Advantages and Features

Built-in diode coil

The 24V DC coil has a built-in suppressor diode to absorb the back electromotive force during power failure, protecting control circuit components and reducing electrical noise.

1 set of normally closed auxiliary contacts

It can be used for circuit breaker feedback, interlock protection, or abnormal alarm signal acquisition, and is suitable for safety interlock circuit design.

Spring-loaded quick-connect terminals

Both the main circuit and auxiliary contacts use spring-clamp connections, eliminating the need for screws and ensuring high wiring efficiency while preventing loosening.

S00 Standard Case

It shares the same housing size as other coil versions in the family, which facilitates standardized panel power distribution design and spare parts management.

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	1 NC (normally closed)
Coil voltage/type	24V DC, built-in suppression diode
Terminal type	Cage clamp type, wire 0.5~4mm²/AWG 20~12
Main contact type	3 NO (Normal Open)
Protection level	IP20
Compliant with regulations	RoHS compliant

Recommend

3RT2016-2JB41

The J-shaped coil is powered by 24V DC, with 3 normally open main contacts and 1 set of normally open auxiliary contacts. It operates at a temperature of -25~60°C and is certified to RoHS and UKCA standards.

3RT2016-2FB41

The F-shaped coil is 24V DC and has a built-in suppression diode. It has 3 sets of main normally open contacts and 1 set of normally open auxiliary contacts. The S00 housing is compact and lightweight, making it suitable for distribution boxes with limited space.

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.