EA2-5NJ NEC, EA2-5NJ Datasheet - Page 10

• Manufacturer Part Number: EA2-5NJ
• Description: Low Signal Relays - PCB COIL 5VDC NON-LATCH
• Manufacturer: NEC
• Series: EA2r

Specifications of EA2-5NJ

• Contact Form: 2 Form C (DPDT)
• Coil Voltage: 5 V
• Coil Current: 2 A
• Coil Type: Non-Latching
• Power Consumption: 140 mW
• Termination Style: PCB Pins
• Maximum Switching Current: 1 A
• Contact Rating: 10 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10
Notes on Correct Use
1. Notes on contact load
Make sure that the contact load is within the specified range;
otherwise, the lifetime of the contacts will be shortened
considerably. Note that the running performance shown is an
example, and that it varies depending on parameters such as
the type of load, switching frequency, driver circuit, and
ambient temperature under the actual operating conditions.
Evaluate the performance by using the actual circuit before
using the relay.
2. Driving relays
- If the internal connection diagram of a relay shows + and -
symbols on the coil, apply the rated voltage to the relay in the
specified direction. If a rippled DC current source is used,
abnormalities such as beat at the coil may occur.
- The maximum voltage that can be applied to the coil of the
relay varies depending on the ambient temperature. Generally,
the higher the voltage applied to the coil, the shorter the
operating time. Note, however, that a high voltage also
increases the bounce of the contacts and the contact opening
and closing frequency, which may shorten the lifetime of the
contacts.
- If the driving voltage waveform of the relay coil rises and
falls gradually, the inherent performance of the relay may not
be fully realized. Make sure that the voltage waveform
instantaneously rises and falls as a pulse.
- For a latching relay, apply a voltage to the coil according to
the polarity specified in the internal connection diagram of
the relay.
- If a current is applied to the coil over a long period of time,
the coil temperature rises, promoting generation of organic
gas inside the relay, which may result in faulty contacts. In
this case, use of a latching relay is recommended.
- The operating time and release time indicate the time required
for each contact to close after the voltage has been applied to
or removed from the coil. However, because the relay has a
mechanical structure, a bounce state exists at the end of the
operating and release times. Furthermore, because additional
time is required until the contact stabilizes after being in a
high-resistance state, care must be taken when using the relay
at high speeds.
- Pins 5 and 6 of the non-latching and single-coil latching types
of the EA2 relay are not used. However, do not connect an
external circuit to these pins.
3. Operating environment
- Make sure that the relay mounted in the application set is
used within the specified temperature range. Use of a relay at
a temperature outside this range may adversely affect
insulation or contact performance.
- If the relay is used for a long period of time in highly humid
(RH 85% or higher) environment, moisture may be absorbed
Coil Rated voltage
85
80
60
40
20
5
0
–60
– 40
1 ms max.
–20
Temperature (˚C)
0
20
40
60
1 ms max.
80
100
ER0001EJ6V1DS00
into the relay. This moisture may react with the NOx and SOx
generated by glow discharges that occur when the contacts
are opened or closed, producing nitric or sulfuric acid. If this
happens, the acid produced may corrode the metallic parts of
the relay, causing operational malfunction.
- Because the operating temperature range varies depending
on the humidity, use the relay in the temperature range
illustrated in the figure below. Prevent the relay from being
frozen and avoid the generation of condensation.
- The relay maintains constant sealability under normal
atmospheric pressure (810 to 1,200 hpa). Its sealability may
be degraded or the relay may be deformed and malfunction if
it is used under barometric conditions exceeding the specified
range.
- The same applies when the relay is stored or transported.
Keep the upper-limit value of the temperature to which the
relay is exposed after it is removed from the carton box to
within 50˚C.
- If excessive vibration or shock is applied to the relay, it may
malfunction and the contacts remain closed. Vibration or shock
applied to the relay during operation may cause considerable
damage to or wearing of the contacts. Note that operation of
a snap switch mounted close to the relay or shock due to the
o p e r a t i o n o f m a g n e t i c s o l e n o i d m a y a l s o c a u s e
malfunctioning.
4. Notes on mounting relays
- When mounting a relay onto a PC board using an automatic
chip mounter, if excessive force is applied to the cover of the
relay when the relay is chucked or inserted, the cover may be
damaged or the characteristics of the relay degraded. Keep
the force applied to the relay to within 1 kg.
- Avoid bending the pins to temporarily secure the relay to the
PC board. Bending the pins may degrade sealability or
adversely affect the internal mechanism.
- It is recommended to solder the relay onto a PC board under
the following conditions:
<1> Reflow soldering
Refer to the recommended soldering temperature profile.
<2> Flow soldering
Solder temperature: 250˚C max., Time: 5 to 10 seconds,
Preheating: 100˚C max./1 minute max.
<3> Manual soldering
Solder temperature: 350˚C, Time: 2 to 3 seconds
- Ventilation immediately after soldering is recommended.
Avoid immersing the relay in cleaning solvent immediately
after soldering due to the danger of thermal shock being
applied to the relay.
- Use an alcohol-based or water-based cleaning solvent. Never
use thinner and benzene because they may damage the relay
housing.
- Do not use ultrasonic cleaning because the vibration energy
generated by the ultrasonic waves may cause the contacts to
remain closed.
5. Handling
- Relays are packaged in magazine cases for shipment. If a
space is created in the case after some relays have been
removed, be sure to insert a stopper to secure the remaining
relays in the case. If relays are not well secured, vibration
during transportation may cause malfunctioning of the
contacts.
- Exercise care in handling the relay so as to avoid dropping it
or allowing it to fall. Do not use a relay that has been dropped.
If a relay drops from a workbench to the floor, a shock of 9,800
m/s2 (1,000 G) or more is applied to the relay, possibly
damaging its functions. Even if a light shock has been applied
to the relay, thoroughly evaluate its operation before using it.
- Latching relays are factory-set to the reset state for shipment.
A latching relay may be set, however, by vibration or shock
applied while being transported. Be sure to forcibly reset the
relay before using it in the application set. Also note that the
relay may be set by unexpected vibration or shock when it is
used in a portable set.
- The sealability of a surface-mount relay may be lost if the
relay absorbs moisture and is then heated during soldering.
When storing relays, therefore, observe the following points:
<1> The storage humidity must be no more than 70% RH. The
recommended storage period is 3 months maximum.
<2> To store the relay for 3 months or longer, keep the storage
humidity to within 50% RH. Do not store the relay for more
than 6 months.
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