ACDC
Specification
20/40 Watts
•Ultra Compact Size
•Single Outputs from 3.3 to 48 V
•Encapsulated
•PCB & Chassis Mount Versions
•<0.3 W No Load Input Power
•Peak Load Capability
•3 Year Warranty
ECE Series
Input
Input Voltage • 85-264 VAC (120-370 VDC) derate load
from 100% at 90 VAC to 90% at 85 VAC
Input Frequency • 47-63 Hz
Input Current • ECE20: 0.3 A rms at 230 VAC
ECE40: 0.5 A rms at 230 VAC
Inrush Current • 20 A at 115 VAC, 40 A at 230 VAC,
cold start at 25 °C
Power Factor • EN61000-3-2 Class A
Earth Leakage Current • Class II construction no earth
No Load Input Power • <0.3 W
Input Protection • ECE20: Internal T1 A/250 VAC fuse
ECE40: Internal T2 A/250 VAC fuse
Output
Output Voltage • See tables
Initial Set Accuracy • ±1%
Minimum Load • No minimum load required
Start Up Delay • 2 s max
Start Up Rise Time • 16 ms max
Hold Up Time • 8 ms minimum at full load & 115 VAC
Line Regulation • ±0.5% max
Load Regulation • ±1% max, ±2% max for ECE40US03/05-S
Transient Response • 4% max deviation, recovery to within
1% in 500 µs for a 25% load change
Ripple & Noise • 3.3-5 V versions: 60 mV pk-pk,
3.3-5 V ‘ECE40-S’ versions: 75 mV
pk-pk (see note 5), all other models 1%
pk-pk max 20 MHz bandwidth
Overvoltage Protection • 115-140% Vnom, auto recovery
Overload Protection • 110-180%
Short Circuit Protection • Trip and restart (hiccup mode)
Temperature • 0.05%/°C
Coefficient
xppower.com
General
Efficiency • See tables
Isolation • 3000 VAC Input to Output
Switching Frequency • 70 kHz typical
Power Density • ECE20: 9.97 W/In3
ECE40: 7.58 W/In3
MTBF • >450 kHrs to MIL-HDBK-217F at 25 °C, GB
Environmental
Operating Temperature • -25 °C to +70 °C, derate linearly from
100% at +50 °C to 50% at +70 °C
Cooling • Convection-cooled
Operating Humidity • 95% RH, non-condensing
Storage Temperature • -40 °C to +85 °C
Operating Altitude • 3000 m
Vibration • 2 g, 10 Hz to 500 Hz, 10 mins/cycle,
60 mins each cycle
EMC & Safety
Emissions • EN55022, level B conducted & radiated
Harmonic Currents • EN61000-3-2, EN61000-3-3
ESD Immunity • EN61000-4-2, level 3 Perf Criteria A
Radiated Immunity • EN61000-4-3, 10 V/m 80% mod
Perf Criteria A
EFT/Burst • EN61000-4-4, level 3 Perf Criteria A
Surge • EN61000-4-5, installation Class 3,
Perf Criteria A
Conducted Immunity • EN61000-4-6, 10 Vrms Perf Criteria A
Magnetic Fields • EN61000-4-8, 10 A/m Perf Criteria A
Dips & Interruptions • EN61000-4-11, 30% for 10 ms,
60% for 100 ms, 100% for 5000 ms
Perf Criteria A, B, B
Safety Approvals • EN60950-1, UL60950-1,
CSA22.2 No. 234 per cUL
GREEN•POWER
31-Mar-11
ACDC
ECE20/40
0.80 ±0.01
(20.3 ±0.3)
1.07
(27.2)
0.40 ±0.01
(10.1 ±0.3)
1.80 ±0.01 (45.7 ±0.3)
0.13
(3.4)
0.13
(3.4)
4 x ø0.04 (ø1.0)
2.06 (52.4)
+Vo
-Vo
ACL
ACN
TOP VIEW
0.91
(23.0)
0.39
(10.0)
0.39 (10.0)
1.10
(27.9)
4x ø 0.04 (ø1.0)
1.50
(38.1)
0.59
(15.0)
1.18
(30.0)
0.16
(4.1)
2.85 (72.4)
0.13 (3.2)
3.10 (78.7)
-Vo
+VoACL
ACN
TOP VIEW
3.01 (76.4)
1.57
(40.0)
0.44
(11.2)
ACN
ACL
3.43 (87.0)
TOP VIEW
4x ø0.14
(4x ø3.5)
0.84
(21.3)
-Vo
+Vo 1.20
(30.5)
1.12
(28.5)
0.39 (10.0)
0.27
(6.8)
0.10
(2.5)
1º
3.78 (96.0)
Optional
DIN clip
Mechanical Details
ECE20 ECE40
ECE40 Screw Terminal (S)
Models and Ratings
Output Power Output Voltage Output Current Efficiency(4) Model Number
Nominal Peak(1)
13.5 W 3.3 VDC 4.50 A 5.85 A 73% ECE20US03†^
20.0 W 5.0 VDC 4.00 A 5.20 A 77% ECE20US05†^
20.0 W 9.0 VDC 2.22 A 2.89 A 83% ECE20US09†^
20.0 W 12.0 VDC 1.67 A 2.17 A 82% ECE20US12†^
20.0 W 15.0 VDC 1.33 A 1.73 A 83% ECE20US15†^
20.0 W 24.0 VDC 0.83 A 1.08 A 82% ECE20US24†^
20.0 W 48.0 VDC 0.42 A 0.55 A 86% ECE20US48†^
35.0 W 3.3 VDC 9.00 A 11.70 A 73% ECE40US03(2)(3)†^
40.0 W 5.0 VDC 8.00 A 10.40 A 77% ECE40US05(2)(3)†^
40.0 W 9.0 VDC 4.44 A 5.77 A 80% ECE40US09(2)(3)†^
40.0 W 12.0 VDC 3.33 A 4.33 A 84% ECE40US12(2)(3)†^
40.0 W 15.0 VDC 2.67 A 3.47 A 84% ECE40US15(2)(3)†^
40.0 W 24.0 VDC 1.67 A 2.17 A 85% ECE40US24(2)(3)†^
40.0 W 48.0 VDC 0.83 A 1.08 A 86% ECE40US48(2)(3)†^
Notes
1. Peak load lasting <30 s with a maximum duty cycle of 10%, average output
power not to exceed nominal power.
2. Add suffix -S to model number to denote chassis mount with screw terminal
type, e.g. ECE40US12-S. Only available with ECE40 models.
3. A screw terminal versions (-S) is available with DIN Clip attached.
Add suffix ‘D’, e.g. ECE40US24-SD. DIN Rail mounting clip is available as a
separate item, order code ECL25/30 DIN CLIP.
4. Average of efficiencies measured at 25%, 50%, 75% & 100% load with
230 VAC input.
5. 3.3 & 5 V ECE40-S versions meet 75 mV pk-pk with 20 MHz bandwidth and
0.1 µF capacitor across output terminals.
1. All dimensions in inches (mm).
2. Weight: ECE20: 0.13 lbs (60 g)
ECE40: 0.33 lbs (150 g)
ECE40 Optional Screw Terminal: 0.37 lbs (170 g)
3. Tolerances: x.xx = ± 0.02 (x.x = ± 0.5), x.xxx = ± 0.01 (x.xx = ± 0.25)
Notes
†Available from Farnell & element14. See pages 284-290.
^Available from Newark. See pages 291-296.