| Protection diode (standard polarity) |
MQ1DN0 |
6-220VDC |
 |
The reverse voltage peaks of the coil are short circuited by the recovery diode (positive to A1 terminal) |
| Protection diode (reversed polarity) |
MQ1LN0 |
6-220VDC |
 |
The reverse voltage peaks of the coil are short circuited by the recovery diode (positive to A2 terminal) |
| Module with LED |
MQ10L0 |
6/24-28/60-110/230VDC/AC |
 |
The LE-diode lights up when the coil is excited. When in DC it is essential that positive is connected to the A1 terminal |
| Module with LED and protection diode (standard polarity) |
MQ1DL0 |
6/24-28/60-110/220VDC |
 |
Only for DC. The reverse voltage peaks are short circuited by the recovery diode (positive to A1 terminal).
The LE-diode lights up when the coil is excited |
| Module with LED and protection diode (reversed polarity) |
MQ1LL0 |
6/24-28/60-110/220VDC |
 |
Only for DC. The reverse voltage peaks are short circuited by the recovery diode (positive to A2 terminal).
The LE-diode lights up when the coil is excited |
| Module with LED and varistor |
MQ1VL0 |
6/24-28/60-110/230VDC/AC |
 |
The reverse voltage peaks of the coil are limited by the varistor. When in DC it is essential that positive is
connected to the A1 terminal |
| RC supressor |
MQ1SN0 |
6/24-28/60-110/230VDC/AC |
 |
The reverse voltage peaks of the coil are limited by the RC module |
| Residual current bypass |
MQ1RN0 |
110/230VAC |
 |
Bypass modules are advisable if relays show a trend to fail to release. Failure to release can be due to residual
currents from AC proximity switches or inductive coupling caused by long parallel lying AC control lines |
