DESCRIPTION
The new NEXEM EX2/EX1 series is PC-board mount type and the most suitable for various motor and
heater controls in the automobiles which require high quality and high performance.
The EX2 series is succeeding in about 60% of miniaturization in comparison with the ET2 series. The EX1 series
is succeeding in about 50% of miniaturization in comparison with the ET1 series.
FEATURES
• PC-board mounting
• Lead free solder is used
• Approx. 75% relay volume of ET2 • Approx. 65% relay volume of ET1
• Approx. 60% relay space of ET2 • Approx. 50% relay space of ET1
• Approx. 88% relay weight of ET2 • Approx. 78% relay weight of ET1
APPLICATIONS
• Motor control
• Solenoid control
EX2 SERIES EX1 SERIES
For Proper Use of Miniature Relays
DO NOT EXCEED MAXIMUM RATING
Do not use relay under excessive conditions such as over ambient temperature, over voltage and over
current. Incorrect use could result in abnormal heating and damage to the relay or other parts.
READ CAUTIONS IN THE SELECTION GUIDE
Read the cautions described in EM Devices' “Miniature Relays” before dose designing your relay
applications.

SPECIFICATION
(at 20 °C)
Items Specifications
EX2 EX1
Contact Form 1c x 2 (Separate) 1c
Max. Switching Voltage 16Vdc
Max. Switching Current 30A (at16Vdc)
Min. Switching Current 1A (5Vdc)
Max. Carrying Current 35A (2minutes max. 12Vdc at 25°C)
30A (2minutes max. 12Vdc at 85°C)
20A (2minutes max. 12Vdc at 125°C)
Contact Rating
Contact Resistance 4mΩ typical (measured at 7A) initial
Contact Material Silver oxide complex alloy
Operate Time (Excluding Bounce) 2.5ms typical (at nominal voltage)
Release Time (Excluding Bounce) 3ms typical (at nominal voltage with diode)
Nominal Operate Power 900mW
Insulation Resistance 100MΩ at 500Vdc
Between Open Contact 500Vac min. (for 1minute)
Withstand Voltage
Between Contact and Coil 500Vac min. (for 1minute)
Misoperation 98m/s2
Shock Resistance
Destructive Failure 980m/s2
Misoperation 10 to 300Hz, 43m/s2
Vibration Resistance
Destructive Failure 10 to 500Hz 43m/s2, 200hour
Ambient Temperature -40 to +125 °C
Coil Temperature Rise 70°C / W (without contact carrying current)
Mechanical 1 x 106 operations
P/W motor lock
(14Vdc, 25A)
Life 100x103 operations
Expectancy Electrical
P/W motor free
(14Vdc, 25A/7A)
100x103 operations
Weight Approx. 6.4g Approx. 3.5g
COIL RATING
(at 20 °C)
Part Numbers
Nominal Voltage
(Vdc)
Coil Resistance
(Ω)+/-10%
Must
Operate Voltage
(Vdc)
Must
Release Voltage
(Vdc)
EX2/1-2U1S
(Sealed type)
12 160 6.5 0.9
EX2/1-2U1
(Unsealed type)
12 160 6.5 0.9