Siemens 3RU2116-1EC0-ZW97 SIRIUS S00 Thermal Overload Relay

Name: 3RU2116-1EC0-ZW97
Brand: Siemens
SKU: 3RU2116-1EC0-ZW97
Availability: LimitedAvailability
Author: Gray-Market Gita

Specifications

Identification

3RU2116-1EC0-ZW97 — Identification
Parameter	Value
Product brand name	SIRIUS
Product designation	thermal overload relay
Frame size (overload relay)	S00
Combinable contactor sizes	S00
Reference code (IEC 81346-2)	F

Protection & Trip

3RU2116-1EC0-ZW97 — Protection & Trip
Parameter	Value
Overload current setting range	2.8 ... 4 A
Trip class	CLASS 10
Overload release type	thermal

Electrical (main circuit)

3RU2116-1EC0-ZW97 — Electrical (main circuit)
Parameter	Value
Rated operational current	4 A
Poles (main circuit)	3
Rated operating frequency	50 ... 60 Hz
Rated insulation voltage (AC, pollution degree 3)	690 V
Rated value (AC-3e), max.	690 V
Rated surge withstand voltage	6 kV
Main current circuit	spring-loaded terminals
Power loss at rated current (hot)	5.7 W
Per pole	1.9 W

Auxiliary contacts

3RU2116-1EC0-ZW97 — Auxiliary contacts
Parameter	Value
Auxiliary contacts: NO	1
Auxiliary contacts: NC	1
Auxiliary contacts: CO (changeover)	0
Auxiliary switch short-circuit protection (required fuse)	fuse gG: 6 A, quick: 10 A
Switching current at 24 V	2 A
Switching current at 60 V	0.3 A
Switching current at 110 V	0.22 A
Switching current at 120 V	3 A
Switching current at 125 V	0.22 A
Switching current at 220 V	0.11 A
Switching current at 230 V	2 A
Switching current at 400 V	1 A

Connection & Mounting

3RU2116-1EC0-ZW97 — Connection & Mounting
Parameter	Value
Mounting / fastening method	Contactor mounting
Mounting position	any
Main-circuit connector arrangement	Top and bottom
Auxiliary/control circuit connection type	spring-loaded terminals
Removable aux./control terminal	No
Conductor cross-section: solid or stranded	2x (0.5 ... 2.5 mm²)
Conductor cross-section: finely stranded with ferrule	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor range (AWG), main contacts	1x (20 ... 12)
Conductor range (AWG), auxiliary contacts	2x (20 ... 14)

Environmental

3RU2116-1EC0-ZW97 — Environmental
Parameter	Value
Operating temperature	-40 ... +70 °C
Storage temperature	-55 ... +80 °C
Transport temperature	-55 ... +80 °C
Relative humidity, operating	10 ... 95 %
Max. installation altitude	2 000 m

Mechanical

3RU2116-1EC0-ZW97 — Mechanical
Parameter	Value
Width	45 mm
Height	87 mm
Depth	70 mm

Product details

Class 10 trip and motor protection

The 3RU2116-1EC0-ZW97 is a SIRIUS S00 thermal overload relay from Siemens, designed for motor protection in control panels.

Mounts directly onto the contactor via the fastening method — no DIN rail needed, which saves panel space. Any mounting position is allowed, so it can be oriented to suit the enclosure layout. A 3.0 x 0.5 mm screwdriver tip is specified for the terminal screws — standard for this class of relay.

Auxiliary contact and status signalling

An integrated auxiliary switch provides a 'Tripped' message contact, giving a clear status signal back to the PLC or HMI. The contact ratings cover control voltages from 24 V (2 A) up to 400 V (1 A), with specific ratings at 120 V (3 A) and 230 V (2 A) — typical for North American and European control circuits. The thermal overload release is temperature-compensated from -40 to +60 °C, so the trip curve stays accurate across a wide ambient range — important for outdoor or unconditioned enclosures.

The MTTF at high demand rate is 2,280 years, reflecting the electromechanical reliability of the design.

Frequently asked questions

What does the 'Tripped' message on the 3RU2116-1EC0-ZW97 mean?

The auxiliary contact on this relay provides a dedicated 'Tripped' signal when the overload has operated. It's a normally-open contact that closes on trip, giving a discrete status to the control system — useful for remote alarm or automatic reset logic.

What is the closest alternative to 3RU2116-1EC0-ZW97 in the SIRIUS family?

The standard 3RU2116-1EC0 (without the -ZW97 suffix) is the base variant without the 'Tripped' message auxiliary contact. Both are S00 size, Class 10, with the same mounting and terminal specifications. The -ZW97 version adds the dedicated status contact for applications requiring remote trip indication.