FAQ02821 of General Purpose Relays FAQ

When Relays turn OFF, counter electromotive force (surge) is generated. Counter electromotive force causes transistors to deteriorate or breakdown. Use Relays with a built-in diode for surge suppression.

Model

Structure		Plug-in terminals
Classification	No. of poles	With indicator		Without indicator
Coil surge absorbing diode (coil for DC applications only)	2	MY2N-D2		MY2-D
	3	MY3N-D2		MY3-D
	4	MY4N-D2		MY4-D
	Double	MY4NZ-D2		MY4Z-D

Note:

1.Make sure that the polarity is correct.

2.The reset time will be longer but it will still be within 20 ms.

3.Diode characteristics:
Withstand inverse voltage: 1,000 V
Forward current: 1 A