Solid-State Switching Devices for Resistive Loads Solid-State Relays 3RF20 solid-state relays, single-phase, 45 mm ■ Overview 45 mm solid-state relays The solid-state relays with a width of 45 mm provide for connec- tion of the power supply lead and the load from above. This makes it easy to replace existing solid-state relays in existing ar- rangements. The connection of the control cable also saves space in much the same way as the 22.5 mm design, as it is sim- ply plugged on. ■ Technical specifications 1) If two different conductor cross-sections are connected to one clamping point, both cross-sections must lie in the range specified.
If identical cross-sections are used, this restriction does not apply. 15 Siemens · 2009 Type 3RF20 ..-1.... 3RF20 ..-4.... General data Ambient temperature • During operation, derating from 40 °C °C • During storage °C -25 ... +60 -55 ... +80 Installation altitude m 0 ... 1000; derating from 1000 Shock resistance g/ms acc. to IEC 60068-2-27 15/11 Vibration resistance g acc. to IEC 60068-2-6 2 Degree of protection IP20 Electromagnetic compatibility (EMC) • Emitted interference - Conducted interference voltage acc. to IEC 60947-4-3 - Emitted, high-frequency interference voltage acc. to IEC 60947-4-3 • Interference immunity - Electrostatic discharge kV acc.
to IEC 61000-4-2 (corresponds to degree of severity 3) - Induced RF fields MHz acc. to IEC 61000-4-6 - Burst acc. to IEC 61000-4-4 kV - Surge acc. to IEC 61000-4-5 kV Class A for industrial applications Class A for industrial applications Contact discharge 4; air discharge 8; behavior criterion 2 0.15 ... 80; 140 dBµV; behavior criterion 1 2/5.0 kHz; behavior criterion 1 Conductor - ground 2; conductor - conductor 1; behavior criterion 2 Connection type Screw terminals Spring-type terminals Connection, main contacts • Conductor cross-section - Solid mm2 - Finely stranded with end sleeve mm2 - Solid or stranded, AWG cables • Terminal screw • Tightening torque Nm lb.in 2 x (1.5 ...
2.5)1), 2 x (2.5 ... 6)1) -- 2 x (1 ... 2.5)1), 2 x (2.5 ... 6)1), 1 x 10 -- 2x (AWG 14 ... 10) -- M4 -- 2 ... 2.5 -- 7 ... 10.3 -- Connection, auxiliary/control contacts • Conductor cross-section mm2 • Stripped length mm • Terminal screw • Tightening torque Nm lb.in 1 x (0.5 ... 2.5), 2 x (0.5 ... 1.0), AWG 20 ... 12 0.5 ... 2.5, AWG 20 ... 12 7 10 M3 -- 0.5 ... 0.6 -- 4.5 ... 5.3 --