Business > Industrial Devices > Automation Controls Top > Components & Devices > Relays / Couplers > Power Relays (Over 2A) > Difference between Polarized and Non-polarized Relays
Non-polarized | Polarized | |
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Main relays | ||
Contact arrangement | 1a, 1c |
1a, 1b, 1c, 2a, 2b, 2c, 1a1b, 4a, 4c, 2a2b, 3a1b |
Latching type | Without |
With |
Nominal operating power (Comparison: 10A type) |
LQ relays 200 mW (1 Form A contact only) |
DK relays 200 mW |
Vibration and shock resistance | Weak compared to polarized relays. |
Strong compared to non-polarized relays. |
Coil power consumption can be controlled, because ON or OFF state of relay contact can be held using pulse input (zero power consumption when there is no pulse drive).
Non-polarized (non-latching) type | Polarized (latching) type | ||||
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When compared under the same contact capacity, the polarized relays are more sensitive than non-polarized relays.
Compared with 10 A switching capacity | LQ relays 200 mW (1 Form A contact only) |
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DK relays 200 mW |
Vibration resistance (Functional) | LQ relays 10 to 55 Hz (double amplitude of 1.6 mm) |
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DK relays 10 to 55 Hz (double amplitude of 3 mm) |
Contact bouncing when resetting is controlled thanks to power of permanent magnet.
NC switching ability at same level as NO (a contact) is maintained.
Non-polarized type | Polarized type | ||||
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