EC2ND High Dielectric Series
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Features
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NEC EC2ND / EE2ND series has based supplementary insulation for EN60950. (TUV Certified File No. R9750561)
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- Insulation distance: more than 2 mm
- Distance through insulation: more than 0.4 mm
- Applicable for the surge voltage standard of FCC (1500 V, 10 x 160 µs) and Telcordia (2500 v, 2 x 10 µs)
- Two types for through-hole mounting (EC2ND series) and surface mounting (EE2ND series)
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Applications
Electronic switching systems, facsimiles, modems, terminal equipment.
Specifications
| Contact Form |
2 Form C |
Contact Ratings
(UL / CSA Rating) |
Maximum Switching Power |
60 W (resistive) |
125 VA (resistive) |
| Maximum Switching Voltage |
220 Vdc |
250 Vac |
| Maximum Switching Current |
2 A |
| Maximum Carrying Current |
2 A |
| Minimum Contact Ratings |
10 mVdc, 10 µA *1 |
| Initial Contact Resistance |
50 mOhm typical (initial) |
| Contact Material |
Silver alloy with gold overlay |
| Nominal Operating Power |
Non-Latch Type |
200 to 230 mW |
| Single Coil Latch Type |
100 to 170 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*2) |
| Between Adjacent Contacts |
1000 Vac for one minute (1500 V surge, 10 x 160 µs*2) |
| Between Coil and Contact |
1500 Vac for one minute (2500 V surge, 10 x 160 µs*3) |
| 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 (-40 to 185°F) |
| Coil Temperature Rise |
25 degrees at nominal coil voltage (200mW) |
| Running Specifications |
No-load |
1 x 108 operations (Non-latch type) *4 |
| 1 x 107 operations (Latch type) |
| 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 grams |
| *1 |
This value is reference value in the resistance load.
Minimum capacity changes depending on switching frequency and environment temperature and the load. |
| *2 |
rise time: 10µs, fall time: 160µs |
| *3 |
rise time: 2µs, fall time: 10µs |
| *4 |
This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of operation by which a steady characteristic is maintained 1 x 107 times. |
Dimensions
mm (inch)
Pad Layout
(bottom view) mm (inch)
Non-latch and Single coil latch
Markings
Schematics
(bottom view)
Part Number System
 EC2 series — through hole type
 Nominal coil voltage
- 3,4.5, 5, 6, 9, 12, 24 V
 Latch type
- Nil: Non-latch type
- S: Single coil latch type
 ND: High insulation type (UL recognized, CSA certified type)
Nominal Lineup
Non-latch Type
at 20°C
| Non-Latch Type |
Nominal
Coil Voltage
(Vdc) |
Coil
Resistance
(Ohm) ±10% |
Must Operate
Voltage*
(Vdc) |
Must Release
Voltage*
(Vdc) |
Nominal
Operate Power
(mW) |
| EC2-3ND |
3 |
45 |
2.25 |
0.3 |
200 |
| EC2-4.5ND |
4.5 |
101 |
3.38 |
0.45 |
200 |
| EC2-5ND |
5 |
125 |
3.75 |
0.5 |
200 |
| EC2-6ND |
6 |
180 |
4.5 |
0.6 |
200 |
| EC2-9ND |
9 |
405 |
6.75 |
0.9 |
200 |
| EC2-12ND |
12 |
720 |
9.0 |
1.2 |
200 |
| EC2-24ND |
24 |
2504 |
18.0 |
2.4 |
230 |
Single-Coil Latch Type
at 20°C
| Single-Coil Latch Type |
Nominal
Coil Voltage
(Vdc) |
Coil
Resistance
(Ohm) ±10% |
Must Operate
Voltage*
(Vdc) |
Must Release
Voltage*
(Vdc) |
Nominal
Operate Power
(mW) |
| EC2-3SND |
3 |
90 |
2.25 |
2.25 |
100 |
| EC2-4.5SND |
4.5 |
203 |
3.38 |
3.38 |
100 |
| EC2-5SND |
5 |
250 |
3.75 |
3.75 |
100 |
| EC2-6SND |
6 |
360 |
4.5 |
4.5 |
100 |
| EC2-9SND |
9 |
810 |
6.75 |
6.75 |
100 |
| EC2-12SND |
12 |
960 |
9.0 |
9.0 |
150 |
| EC2-24SND |
24 |
3388 |
18.0 |
18.0 |
170 |
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 |
TUV Certificate (EN60255 / IEC60255)
No. R 9750561 |
Creepage and clearance of
coil to contact is over than 2 mm.
(According EN60950 working-voltage 250 V) |
| Supplementary insulation class |
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