Product Description
Siemens 3RT2028-1BE40 Sirius 38 AMP size S0 contactor with a 60 volt DC coil and 1 N.O./1 N.C. base mounted auxiliary contact. This IEC 3 pole contactor is rated for 10 H.P. @ 230 volt, 25 H.P. @ 460 volt 3 phase, has screw terminals and mounts on standard 35MM din rail. A full range of accessories for the 3RT2028-1BE40 are available such as thermal and solid state overload relays along with front and side mounted auxiliary contacts. This 38 AMP Siemens contactor is the electrical and dimensional replacement for the now obsolete 3RT1034-1BE40 though any existing direct mount accessories would need to be replaced.
| Coil Voltage | 60 volt DC |
| AMP Rating | 38 AMP |
| Horsepower |
25 H.P. @ 460 volt 10 H.P. @ 230 volt |
| Auxiliaries |
1 normally open 1 normally closed |
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Auxiliaries | |
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Overload Relays |
H.P. ratings comparison
| 3RT1034 | 3RT2028 | ||||||
| Single Phase | Three Phase | Single Phase | Three Phase | ||||
| 115v | 230v | 230v | 460v | 115v | 230v | 230v | 460v |
| 2 | 5 | 10 | 25 | 3 | 5 | 10 | 25 |
DESIGN
The 3RT2028-1BE40 contactor is suitable for use in any climate. They are safe from touch to DIN VDE 0106 Part 100. The 3RT contactors are available screw, spring-type, or ring lug connections. An auxiliary contact is integrated in the basic unit of size S00 contactors. The basic units of sizes S0 to S3 only contain the main conducting paths. All the basic units can be extended with auxiliary switch blocks. Cabinet units with 2 NO + 2 NC (terminal designations acc. to EN 50 012) are available as of size S0; the auxiliary switch block is removable. The size S3 contactors have removable box terminals for the main conductor connections. Ring cable lugs or bars can thus also be connected.
CONTACT RELIABILITY
If voltages ≤ 110 V and currents ≤ 100 mA are to be switched, the auxiliary contacts of 3RT contactors and 3RH contactor relays should be used to ensure good contact stability. These auxiliary contacts are suitable for electronic circuits with currents ≥ 1 mA at a voltageof 17 V.
