Panasonic ASCT1F46E manual voltage

７. Contact	1.	Load switch
reliability
	2.	Installation
		condition
8. Contact	1. Transient
resistance		state
	2.	Contact
		voltage,
		current
9. Operate	1.	Coil applied
noise		voltage
	2.	Operate
		noise at
		installation
10.Mechanical	1.	Abnormal
noise		noise

11. Electrical	1. Serge
noise	voltage

9 When switching with a very small load after switching with a large load, “contact failure by small load switching” may occur due to particles generated during switching of the contact with large load. Please note that or contact us.

Note that if it is connected or installed with a high heat-capacity such as bas bar, connector, harness, and PCB, heat removal phenomenon at low temperature will make relay terminals and contacts cool and condensate a small amount of organic gas inside the relay, which may cause a contact failure. So, please contact us before use.

Contact resistance consists of dynamic and static contact resistance. “Contact resistance” on the catalogue and the specifications refers to static contact resistance. Dynamic contact resistance usually shows a large value due to just after the contact operation. Please contact us if a stable contact resistance is necessary soon after a relay is turned on.

Note that if the contact-applied voltage is small (at 6V or less) and contact-applied current is small (at 1A or less), contact resistance may become a larger value due to a small amount of film on a contact surface.

Mechanical relays produce an operational noise at operate and release time. Note that if the coil-applied voltage is higher at operate time, the noise becomes larger.

It is necessary to test relays in actual installation condition because operate noise may become larger in the installation condition than with a relay by itself due to resonance and sympathetic vibrations of installation PCB and system module.

Note that if a large current is applied to the contact, electromagnetic repulsion makes contact vibrate and produces an abnormal noise. Please contact us if quietness is required.

Note that if an external vibration and shock are applied to a relay while the relay turns off, a movable part of the relay may vibrate and produce a noise. So, please test in the actual use condition if quietness is required.

When the relay turns off, serge voltage is generated from the coil. This serge voltage can be reduced if a resistor is connected in parallel to the coil. Likewise, it can be reduced more if a diode instead of resistor is connected in parallel.

However, please contact us or note that if a resistor or a diode is connected in parallel electrical life may be affected due to slowing down of release time.