3RF2320-3AA44
SEMICONDUCTOR CONTACTOR 3RF2

From SIEMENS

Solid-state contactor 1-phase 3RF2 AC 51 / 20 A / 40 °C 48-460 V / 4-30 V DC Ring cable connection
General technical data
Product brand nameSIRIUS
Product designationsolid-state contactor
Product functionzero-point switching
Number of poles for main current circuit1
Protection class IPIP00
Product designation _1 of the accessories that can be orderedterminal cover
Manufacturer's article number _1 of the accessories that can be ordered
Product designation _3 of the accessories that can be orderedconverter
Manufacturer's article number _3 of the accessories that can be ordered
Product designation _4 of the accessories that can be orderedload monitoring
Manufacturer's article number _4 of the accessories that can be ordered
Ambient temperature
during operation°C-25 ... +60
during storage°C-55 ... +80
Installation altitude at height above sea level maximumm1 000
Vibration resistance acc. to IEC 60068-2-62g
Shock resistance acc. to IEC 60068-2-2715g / 11 ms
Reference code acc. to DIN 40719 extended according to IEC 204-2 acc. to IEC 750K
Reference code acc. to DIN EN 61346-2Q
Number of NC contacts for auxiliary contacts0
Number of NO contacts for auxiliary contacts0
Number of CO contacts for auxiliary contacts0
Main circuit
Number of NO contacts for main contacts1
Number of NC contacts for main contacts0
Operating current
minimummA500
at AC-51 rated valueA20
at AC-51 acc. to IEC 60947-4-3A13.2
Derating temperature°C40
Power loss [W] total typicalW20
Reverse current of the thyristormA10
Blocking voltage at the thyristor for main contacts maximum permissibleV1 200
Rate of voltage rise at the thyristor for main contacts maximum permissibleV/µs1 000
Surge current resistance rated valueA600
I2t value maximumA²·s1 800
Operating voltage at AC
at 60 Hz rated valueV48 ... 460
at 50 Hz rated valueV48 ... 460
Operating range relative to the operating voltage at AC
at 50 HzV40 ... 506
at 60 HzV40 ... 506
Operating frequency rated valueHz50 ... 60
Insulation voltage rated valueV600
Control circuit/ Control
Type of voltage of the control supply voltageDC
Control supply voltage 1
at DC
— Initial rated valueV4
— Final rated valueV30
— rated value maximum permissibleV30
Control supply voltage
at DC initial value for signal <1> detectionV4
at DC Full-scale value for signal<0> recognitionV1
Control current
at DC rated valuemA20
Installation/ mounting/ dimensions
Mounting typescrew and snap-on mounting onto 35 mm standard mounting rail
Mounting type Side-by-side mountingYes
Design of the thread of the screw for securing the equipmentM4
Tightening torque of the screw for securing the equipmentN·m1.5
Widthmm22.5
Heightmm100
Depthmm123.5; 140.5 mm up to product revision E05
Connections/Terminals
Type of electrical connection for main current circuitring cable connection
Design of the thread of the connection screw for main contactsM5
Tightening torque for main contacts with screw-type terminalsN·m2 ... 2.5
Type of connectable conductor cross-sections for main contacts
for JIS cable lugJIS C 2805 R 2-5, 5,5-5, 8-5, 14-5
Type of connectable conductor cross-sections
for DIN cable lug for main contactsDIN 46234 -5-2,5, -5-6, -5-10, -5-16, -5-25
at AWG conductors
— for auxiliary and control contacts1x (AWG 20 ... 12)
Type of connectable conductor cross-sections for auxiliary and control contacts
solid1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)
finely stranded
— with core end processing1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)
— without core end processing1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)
Connectable conductor cross-section
for auxiliary and control contacts
— solidmm²0.5 ... 2.5
— finely stranded
— with core end processingmm²0.5 ... 2.5
— without core end processingmm²0.5 ... 2.5
AWG number as coded connectable conductor cross section
for auxiliary and control contacts20 ... 12
Type of electrical connection for auxiliary and control current circuitring cable connection
Design of the thread of the connection screw of the auxiliary and control contactsM3
Wire stripping length of the cable
for main contactsmm10
for auxiliary and control contactsmm10
Tightening torque for auxiliary and control contacts with screw-type terminalsN·m0.5 ... 0.6
Tightening torque [lbf·in] for auxiliary and control contacts with screw-type terminalslbf·in4.5 ... 5.3

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