Part | RoHS | Manufacturer | Relay Type | Mounting Feature | Relay Action | Relay Function | Coil or Input Supply Type | Reference Standard | Maximum Contact AC Rating (R Load) | Dielectric Strength Between Open Contacts | AC Coil Release Voltage | Relay Form | AC Coil Operate Voltage | Operate Time | Electrical Life | Release Time | Insulation Resistance | Coil Power (mW) | Packing Method | Body Length/Diameter | Body Width | Coil Resistance | Sealing | Weight | Maximum AC Coil Current | No. of Terminals | Physical Dimension | End Contact Plating | Body Height | Dielectric Strength Between Coil & Contacts | Maximum Contact DC Rating (R Load) | Maximum Operating Temperature | Maximum AC Contact Current | Maximum DC Coil Current | Maximum AC Coil Voltage | Minimum Operating Temperature | DC Coil Release Voltage | Terminal Finish | Maximum DC Contact Current | Termination Type | Nominal Coil Voltage | DC Coil Operate Voltage | Manufacturer Series | Contact Resistance | Input Switching Control Type | End Contact Material | PCB Hole Count | Maximum DC Contact Voltage | Additional Features | Maximum AC Contact Voltage | JESD-609 Code | Terminal Length | Maximum DC Coil Voltage | Contact or Output Supply Type |
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Siemens |
Safety Relay |
Panel Mount |
Momentary |
4PST |
Bulk |
24 V |
Screw |
24 V |
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Siemens |
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Siemens |
Monitoring Relay |
DIN-Rail Mount |
Change-Over |
AC/DC |
CCC; CE; EAC; RCM; UL |
1 Form C |
20.4 V |
3.622 in (92 mm) |
22.5 in (571.5 mm) |
IP20 |
3.622 x 0.886 x 3.583 in (92 x 22.5 x 91 mm) |
3.583 in (91 mm) |
27.6 V |
Snap-on |
24 V |
20.4 V |
27.6 V |
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Siemens |
Monitoring Relay |
DIN-Rail Mount |
SPDT |
CCC; CE; CSA; C-TICK; EAC; UL |
100000 Cycle(s) |
3.098 in (78.7 mm) |
45 in (1143 mm) |
IP20 |
3.098 x 1.772 x 3.256 in (78.7 x 45 x 82.7 mm) |
3.256 in (82.7 mm) |
60 °C (140 °F) |
-25 °C (-13 °F) |
Snap-on |
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Siemens |
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Siemens |
Safety Relay |
DIN-Rail Mount |
Momentary |
4PST |
CCC; CE; CSA; EAC; RCM; UL |
3A@230VAC |
3.937 in (100 mm) |
22.5 in (571.5 mm) |
IP20 |
3.937 x 0.886 x 4.791 in (100 x 22.5 x 121.7 mm) |
4.791 in (121.7 mm) |
3A@24VDC |
60 °C (140 °F) |
3 A |
-25 °C (-13 °F) |
3 A |
Snap-on |
19.2 V |
24 V |
230 V |
24 V |
AC/DC |
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Siemens |
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Siemens |
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Siemens |
Safety Relay |
DIN-Rail Mount |
4PST |
CCC; CE; CSA; EAC; RCM; UL |
3A@230VAC |
3.937 in (100 mm) |
22.5 in (571.5 mm) |
IP20 |
3.937 x 0.886 x 4.791 in (100 x 22.5 x 121.7 mm) |
4.791 in (121.7 mm) |
3A@24VDC |
60 °C (140 °F) |
3 A |
-25 °C (-13 °F) |
3 A |
Snap-on |
19.2 V |
24 V |
230 V |
24 V |
AC/DC |
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Siemens |
Safety Relay |
DIN-Rail Mount |
Momentary |
4PST |
CCC; CE; CSA; EAC; RCM; UL |
5A@230VAC |
3.937 in (100 mm) |
22.5 in (571.5 mm) |
IP20 |
3.937 x 0.886 x 4.791 in (100 x 22.5 x 121.7 mm) |
4.791 in (121.7 mm) |
5A@24VDC |
60 °C (140 °F) |
5 A |
240 V |
-25 °C (-13 °F) |
5 A |
Snap-on |
204 V |
24 V |
Contact details captured for NO; Coil Operate Voltage (AC): 204 V |
230 V |
240 V |
AC/DC |
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Siemens |
Safety Relay |
DIN-Rail Mount |
Momentary |
5PST |
CCC; CE; CSA; EAC; RCM; TUV; UL |
2A@230VAC |
3.937 in (100 mm) |
22.5 in (571.5 mm) |
IP20 |
3.937 x 0.886 x 4.791 in (100 x 22.5 x 121.7 mm) |
4.791 in (121.7 mm) |
5A@24VDC |
60 °C (140 °F) |
2 A |
-25 °C (-13 °F) |
5 A |
Snap-on |
19.2 V |
24 V |
230 V |
24 V |
AC/DC |
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Siemens |
Special function relays are a type of electrical switch that can perform a specific function based on their design and construction. They are designed for specific applications that require unique features such as high voltage or current capacity, high-speed switching, or low power consumption.
Some examples of special function relays include time delay relays, latching relays, safety relays, and solid-state relays. Time delay relays are used to control the timing of circuits or processes and can be programmed to switch on or off after a certain amount of time. Latching relays, on the other hand, require a pulse of current to switch on and remain on even after the pulse is removed until a reset pulse is applied.
Safety relays are designed to interrupt power to a machine or process when a safety interlock is activated, helping to prevent accidents or injuries. Solid-state relays use electronic components such as transistors and diodes to switch high loads and are preferred in applications that require high speed, low noise, and long life.