Relay classification
Relay mainly can be divided into the following kinds:
1. Electromagnetic relay (a: Dc electromagnetic relay b: Ac electromagnetic relay c: magnetic latching relay)
2. solid relay
3. hybrid relay
4. temperature relay
5. reed relay (a: dry reed relay b: wet reed relay c: remain reed relay d: reed switch)
6. time relay
7. optical coupling relay
8. high frequency relay
9. polarization relay (a: two position polarization relay b: two bias plan relay c: three position polarization relay)
10. high-voltage relay
According to other forms can be divided into the following kinds:
According to relay the appearance of size classification
Name definition:
|
name |
definition |
|
Miniature relay |
Longest edge ≤ 10mm |
|
Subminiature relay |
10mm ≤Longest edge≤ 25mm |
|
Minitype miniature relay |
25mm ≤Longest edge≤ 50mm |
Classification by the load :
|
name |
definition |
|
Micropower relay |
When contact open circuit voltage is DC 28 v, contact rated load current (impedance) is 0.1 A; 1 A relay |
|
Weak power relay |
When contact open circuit voltage is DC 28 v, contact rated load current (impedance) is 0.5 A; 0.2 A relay |
|
Middle power relay |
When contact open circuit voltage is DC 28 v, contact rated load current (impedance) is 2 A; 5A relay |
|
High power relay |
When contact open circuit voltage is DC 28 v, contact rated load current (impedance) is 10 A; 20A; 25a;40A …relay |
Classification by protection feature:
|
name |
definition |
|
Sealed relay (SH) |
The welding or other method, sealed the case, make the contact and coil inside, Ambient medium isolation, the leakage rate lower relay |
|
Use the case protect contact and coil (sealed or not sealed) | |
|
Open type relay(S) |
Not Use the case to protect contact and coil |
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