DATA SHEET AUTOMOTIVE RELAYS DESCRIPTION The new NEC EX/EX 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 EX series is succeeding in about % of miniaturization in comparison with the ET series. The EX series is succeeding in about % of miniaturization in comparison with the ET series. FEATURES PC-board mounting Lead free solder is used Approx. 7% relay volume of ET Approx. % relay space of ET Approx. % relay weight of ET Approx. % relay volume of ET Approx. % relay space of ET Approx. 7% relay weight of ET APPLICATIONS Motor control Solenoid control EX SERIES EX 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 NEC s Miniature Relays (EREJ*) before dose designing your relay applications. The information in this document is subject to change without notice.
SCHEMATIC (BOTTOM VIEW) EX EX 7 3 3 9 (Unit A) (Unit B) DIMENSIONS [mm] VENT HOLE PHILIPPINES EX-US A 9 PHILIPPINES EX-US B 3. ±.. ±.. ±. 7. ±..9 3.7 ±. 3.7 ±. *-. x. *-. x....7 3. *3. +./-. *-. x. *3. +./-..3 3.9.3 3. 3.3 3. 3.9.9..3. 3.9 3..3 3. *. x. *-. x.7 3..7.. * AFTER SOLDER DIP..3 *-. x.7 EX PCB PAD LAYOUT [mm] (BOTTOM VIEW) EX EX EX -φ.9 +./- -φ. +./- 3-φ. +./- -φ. +./- -φ. +./- -φ. +./-
SPECIFICATION (at C) Items Specifications EX EX Contact Form c x (Separate) c Contact Rating Contact Material Max. Switching Voltage Max. Switching Current Min. Switching Current Max. Carrying Current Contact Resistance Vdc 3A (atvdc) A (Vdc) 3A (minutes max. Vdc at C) 3A (minutes max. Vdc at C) A (minutes max. Vdc at C) mω typical (measured at 7A) initial Silver oxide complex alloy Operate Time (Excluding Bounce) Release Time (Excluding Bounce) Nominal Operate Power Insulation Resistance.ms typical (at nominal voltage) 3ms typical (at nominal voltage with diode) 9mW MΩ at Vdc Withstand Voltage Between Open Contact Between Contact and Coil Vac min. (for minute) Vac min. (for minute) Shock Resistance Misoperation 9m/s Destructive Failure 9m/s Misoperation to 3Hz, 3m/s Vibration Resistance Destructive Failure to Hz 3m/s, hour Ambient Temperature - to + C Coil Temperature Rise Mechanical 7 C / W (without contact carrying current) x operations Life Expectancy Electrical P/W motor lock (Vdc, A) P/W motor free (Vdc, A/7A) x 3 operations x 3 operations Weight Approx..g Approx. 3.g COIL RATING (at C) Part Numbers Nominal Voltage (Vdc) Coil Resistance (Ω)+/-% Must Operate Voltage (Vdc) Must Release Voltage (Vdc) EX/-US (Sealed type) EX/-U (Unsealed type)..9..9 3
NUMBERING SYSTEM EX/- U S Enclosure Nil: Unsealed S: Sealed Must Operate Voltage (at C) Contact Material :.V U: Silver oxide complex alloy Coil Resistance (at C) : Ω
TECHNICAL DATA Coil Temperature Rise V Coil Temperature Rise ( C) V.V Time (min) Saturated Coil Temperature ( C).. Coil Wattage (W)
RELAY CHARACTERISTICS DISTRIBUTION (INITIAL, n = pcs., at C) Operate/Release Voltage Operate voltage Release voltage 9 9 7 3.. 3 7 9 Operate/Release voltage (V) Contact Resistance Coil Resistance Contact resistance (N/O) Contact resistance (N/C) Coil resistance 9 9 9 9 7 3 7 3.... Contact resistance (mω) Operate Time 3 7 9 Coil resistance (Ω) Release Time Operate Time (Excluding contact bounce) Operate Time (Including contact bounce) Release Time (Excluding contact bounce) Release Time (Including contact bounce) 9 9 9 9 7 3 7 3.... with coil clump diode 3 7 9 3 7 9 Operate time (ms) Release time (ms)
ELECTRICAL LIFE TEST (Vdc-A, P/W motor, Lock) Test items Test conditions Samples. Operate voltage. Release voltage 3. Contact resistance. Coil resistance. Operate time. Release time (with coil clump diode) Temperature : C Frequency :.s ON, 9.s OFF,.Hz Contact load :Vdc-A, P/W motor, Lock Number of operations : x 3 EX-US pcs.v max. Voltage (V) Voltage (V).9V min. Operate voltage Release voltage 3 3 Deviation (%) - - -3 - Deviation (%) - - -3 - - - Operate voltage Release voltage 7
mω max. mω max. Resistance (mω) Resistance (mω) Contact resistance (N/O) Contact resistance (N/C) 9 Ω±% Resistance (Ω) 7 3 Coil resistance ms max. ms max. Time (ms) Time (ms) Operate time Release time
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