ESO02000 Datasheet, PDF (3/5 Pages) celduc-relais – VOLTAGE PROTECTION FOR DC SOLID-STATE RELAYS

celduc ^®
relais
PRELIMINARY
S/ACC/ESO02000/B/22/09/08
Page 3/5 UK
CHARACTERISTICS OF THE BUILT-IN VOLTAGE PROTECTION (D1)
Fig. 4
LEAKAGE CURRENT (Ielk)
VS DC OUTPUT SSR SWITCH VOLTAGE (Ut)
Ielk / Ie
1
0,8
0,6
0,4
0,2
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 Ut (V)
U t max
Utp
(=Uemax)
Ielk : Leakage current of the relay
Ie : User load nominal current
Utp : Relay max. non repetitive peak voltage
Fig. 5
OVERVOLTAGE DURATION
AND FREQUENCY ABSOLUTE LIMITS
Uto < Utp
t
max
=
(Uto
2.5
−Ut max)
×
Ie
P( protection) = 2W max
⇒
(Uto − Ut max) × Ie × t
T
≤
2
Utmax : Max. nominal voltage of the relay
Uto : Possible overvoltage above Utmax
Utn = Ue : User DC power supply voltage
t : Overvoltage duration
T: Time between 2 overvoltage
OUTPUT CHARACTERISTIC CURVES
Fig. 6
VOLTAGE DROP VS CURRENT
(DIODE D2 DURING FLY WHEEL)
Fig. 7 OUTPUT LED (D3) CURRENT VS LOAD VOLTAGE
3,5
3
VD2 (V)
2,5
Tj = 150°C
Tj = 25°C
2
1,5
1
0,5
0
0
I (A)
100
200
300
400
500
600
700
800
900
1000
Fig. 8
THERMAL IMPEDANCE
(DIODE D2)
30
ID2 (mA)
25
20
15
10
5
VD2 (V)
0
0
10
20
30
40
50
60
70
Fig. 9
OVERLOAD PERMITTED DURING ON-STATE
(DIODE D2 DURING FLY WHEEL)
Not available
Not available