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EC2 Series

Features | Applications | Specifications | Dimensions | Pad Layout | Markings
Schematics | Part Number System | Nominal Lineup | Safety Standard and Rating

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EC2/EE2 Series Data

Features

The NEC EC2 series relays are low power consumption, low magnetic interference relays that meet 2500V surge requirements(between coil and contacts). Their compact lightweight through hole lead design makes them ideal for use in telecommunication equipment. This series complies with FCC Part 68 2500V surge voltage requirements.

The EC2 series is available in 2 form C (DPDT) contact arrangements for all latch types.

CSAUR
  • Compact and lightweight
  • 2 form C contact arrangement
  • Low power consumption
  • Reduced mounting space: 15 mm x 7.5 mm
  • High-breakdown voltage of coil to contacts: 1500 Vac, 2500 V (2 x 10 µs*)
  • Capable of high-power switching: 700 Vac, 4.2 A, 4 times in case of accident
  • UL recognized (E73266), CSA certified (LR46266)
  • Certified to EN 60950

Applications

Electronic switching systems, PBX, terminal equipment, telephone systems.

Specifications

Contact Form 2 form C
Contact Material Silver alloy with gold alloy overlay
Contact Ratings Maximum switching power 60 W, 125 VA
Maximum switching voltage 220 Vdc, 250 Vac
Maximum switching current 2 A
Maximum carrying current 2 A
Minimum Contact Ratings 10 mVdc, 10 µA (resistive)
Initial Contact Resistance 50 mOhm typical
Nominal Operating Power Nonlatch type 140 mW (3 to 12 V), 200 mW (24 V)
Single coil latch type 100 mW
Double coil latch type 140 mW
Operate Time (Excluding bounce) Approximately 2 ms without diode
Release Time (Excluding bounce) Approximately 1 ms without diode
Insulation Resistance 1000 MOhm at 500 Vdc
Breakdown Voltage Between open contacts 1000 Vac (for one minute)
1500 V surge (10 x 160 µs*)
Between adjacent contacts
Between coil to contacts 1500 Vac (for one minute)
2500 V surge (2 x 10 µs**)		 Double Coil: 1000 Vac (for one minute)
Latch Type: 1500 V surge (10 x 160 µs*)
Shock Resistance 735 m/s2 (75 G) (misoperating)
980 m/s2 (100G) (destructive failure)
Vibration Resistance 10 to 55 Hz, double amplitude 3 mm (20 G) (misoperating)
10 to 55 Hz, double amplitude 5 mm (30 G) (destructive failure)
Ambient Temperature -40 to +85°C
Coil Temperature Rise 18 degrees at nominal coil voltage (140mW)
Running Specifications Nonload 1 x 107 operations
Load 50 Vdc, 0.1 A (resistive) 1 x 106 operations at 85°C
10 Vdc, 10 mA (resistive)1 x 106 operations at 85°C
Weight Approximately 1.9 g
* rise time: 10µs,
fall time: 160µs
 ** rise time: 2µs,
fall time: 10µs

EC2 Dimensions

mm (inch)

Pad Layout

(bottom view) mm (inch)

Markings

Schematics

(bottom view)

Part Number System

EC2
1		 - 3
2		 S
3		 NJ
4
1 Relay series — through hole type
2 Nominal coil voltage (See nominal lineup)
3 Latch type
Blank: Non-latch type (standard)
S: Single coil latch type
T: Double coil latch type
4 Identifier
NJ: Trimmed leads standard type (UL recognized, CSA certified type)
NU: UL recognized, CSA certified type
NC: Ultrasonic cleaning availble type (only non-latch type) (UL recognized, CSA certified type)
NP: Silver-palladium alloy contact (with gold alloy overlay) (UL recognized, CSA certified type)

Nominal Lineup

Nonlatch Type at 25° C

 Part Number 
(Standard)		 Nominal
 Coil Voltage 
(Vdc)		 Coil
Resistance
 (Ohm) ±10% 		  Must Operate 
Voltage
(Vdc)		  Must Release 
Voltage
(Vdc)
  EC2-3NJ 3 64.3 2.25 0.3
  EC2-4.5NJ 4.5 145 3.38 0.45
  EC2-5NJ 5 178 3.75 0.5
  EC2-6NJ 6 257 4.5 0.6
  EC2-9NJ 9 579 6.75 0.9
  EC2-12NJ 12 1028 9 1.2
  EC2-24NJ 24 2880 18.0 2.4

Single Coil Latch Type at 25 °C

 Part Number 
(Standard)		 Nominal
 Coil Voltage 
(Vdc)		 Coil
Resistance
 (Ohm) ±10% 		  Must Operate 
Voltage
(Vdc)		  Must Release 
Voltage
(Vdc)
  EC2-3SNJ 3 90 2.25 2.25
  EC2-4.5SNJ 4.5 202.5 3.38 3.38
  EC2-5SNJ 5 250 3.75 3.75
  EC2-6SNJ 6 360 4.5 4.5
  EC2-9SNJ 9 810 6.75 6.75
  EC2-12SNJ 12 1440 9.0 9
  EC2-24SNJ 24 5760 18.0 18

Double Coil Latch Type at 25 °C

 Part Number 
(Standard)		 Nominal
Coil Voltage
(Vdc)		 Coil
Resistance
 (Ohm) ±10% 		 Must Operate
Voltage
(Vdc)		  Must Release 
Voltage
(Vdc)
  EC2-3TNJ 3 S 64.3 2.25 -
R 64.3 - 2.25
  EC2-4.5TNJ 4.5 S 145 3.38 -
R 145 - 3.38
  EC2-5TNJ 5 S 178 3.75 -
R 178 - 3.75
  EC2-6TNJ 6 S 257 4.5 -
R 257 - 4.5
  EC2-9TNJ 9 S 579 6.75 -
R 579 - 6.75
  EC2-12TNJ 12 S 1028 9.0 -
R 1028 - 9.0
  EC2-24TNJ 24 S 4114 18.0 -
R 4114 - 18.0
Note S: Set Coil (pin No. 1 and 12)
R: Reset Coil (pin No. 6 and 7)

Safety Standard and Rating

UL Recognized
(UL508)*
File No. E73266		 CSA Certified
(CSA C22.2 No. 14)
File No. LR46266
30 Vdc, 2 A (Resistive)
110 Vdc, 0.3 A (Resistive)
125 Vac, 0.5 A (Resistive)

* Spacing: UL114, UL478, UL1950
   EN60950

EC2/EE2 Series Data

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Last updated: 6-1-01