UD2-5NU NEC, UD2-5NU Datasheet - Page 12

• Manufacturer Part Number: UD2-5NU
• Description: Low Signal Relays - PCB DPDT NL 5VDC
• Manufacturer: NEC
• Series: UC2/UD2r

Specifications of UD2-5NU

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

12
NOTES ON CORRECT USE
1. Notes on contact load
●
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
●
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.
●
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.
●
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.
●
the polarity specified in the internal connection diagram of
the relay.
●
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.
●
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 high-
resistance state, care must be taken when using the relay at
high speeds.
3. Operating environment
●
used within the specified temperature range. Use of a relay at
a temperature outside this range may adversely affect
insulation or contact performance.
●
(RH 85% or higher) environment, moisture may be absorbed
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.
Permanent magnets are used in polarized relays.
For this reason, when magnet, transformer, or speaker is
located nearby, the relay characteristics may change and faulty
operations may result.
Coil rated voltage
The operating time and release time indicate the time required
For a latching relay, apply a voltage to the coil according to
If the relay is used for a long period of time in highly humid
Make sure that the contact load is within the specified range;
If the internal connection diagram of a relay shows + and -
If a current is applied to the coil over a long period of time,
Make sure that the relay mounted in the application set is
The maximum voltage that can be applied to the coil of the
If the driving voltage waveform of the relay coil rises and
85
80
60
40
20
0
5
−60 −40 −20
Less than 1 ms
Temperature (°C)
0
20
40
Less than 1 ms
60
80
100
●
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.
●
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.
●
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.
●
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
operation of magnetic solenoid may also cause
malfunctioning.
4. Notes on mounting relays
●
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.
●
PC board. Bending the pins may degrade sealability or
adversely affect the internal mechanism.
●
the following conditions:
<1> Reflow soldering
<2> Flow soldering
<3> Manual soldering
●
Avoid immersing the relay in cleaning solvent immediately
after soldering due to the danger of thermal shock being
applied to the relay.
●
use thinner and benzene because they may damage the relay
housing.
●
generated by the ultrasonic waves may cause the contacts to
remain closed.
5. Handling
●
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.
●
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/s
damaging its functions. Even if a light shock has been applied
to the relay, thoroughly evaluate its operation before using it.
●
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.
●
relay absorbs moisture and is then heated during soldering.
When storing relays, therefore, observe the following points:
<1> Please use relays within 12 months after delivery. (Storage
<2> For MBB packing, Please use relays within 2 years after delivery.
Avoid bending the pins to temporarily secure the relay to the
Use an alcohol-based or water-based cleaning solvent. Never
Latching relays are factory-set to the reset state for shipment.
Because the operating temperature range varies depending
If excessive vibration or shock is applied to the relay, it may
When mounting a relay onto a PC board using an automatic
It is recommended to solder the relay onto a PC board under
Do not use ultrasonic cleaning because the vibration energy
Exercise care in handling the relay so as to avoid dropping it
The same applies when the relay is stored or transported.
Ventilation immediately after soldering is recommended.
The sealability of a surface-mount relay may be lost if the
Relays are packaged in magazine cases for shipment. If a
The relay maintains constant sealability under normal
2
Refer to the recommended soldering temperature profile.
Solder temperature: 260˚C max., Time: 5 seconds max.,
Preheating: 100˚C max./1 minute max.
Solder temperature: 350˚C, Time: 2 to 3 seconds
conditions : 30 degrees C / 60% RH)
(Storage conditions : 30 degrees C / 60% RH)
After opening MBB packing, Please use within 3 months.
(Storage conditions : 30 degrees C / 60% RH)
(1,000 G) or more is applied to the relay, possibly
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