SEMITEC Voltage Regulating Diode (VRD) is a transient voltage suppressor device that is designed to absorb voltage surges and spikes that occur during power initiation. Our VRD features uniform avalanche breakdown across the junction, enabling very fast response to surge voltage.
Furthermore, its control voltage is almost independent from the current which makes it a highly reliable, high performance device.
Applications
- Protection of telecommunications line and equipment from lightning-induced surges
- ESD protection
- EMP protection
- Relays, solenoids, etc., switching surge protection
- Surge protection of fire alarms, smoke detectors, etc.
- Protection of electric circuits from abnormal voltage conditions
ZD Type
Specifications
| Item |
Symbol |
Rating |
Unit |
Condition |
| Rated power |
P |
0.5 |
W |
|
| Allowable transient power |
PP |
250 |
W |
10/1000μs |
| 1000 |
W |
1.2/50μs |
| 3000 |
W |
8/20μs |
| Operating temperature range |
|
-40〜125 |
℃ |
|
| Storage temperature range |
Tstg |
-40〜130 |
℃ |
|
| Rated voltage |
Vs |
Please see below. |
| Peak reverse voltage |
VPRV |
200 |
V |
10μs |
(Ta=25℃)
Dimensions
Electrical Characteristics
| Part No. |
Item |
Breakdown voltage |
Rated voltage |
Maximum Leakage current |
Maximum clamping voltage & maximum peak pulse current |
Temperature coefficient (TYP) |
Capacitance (TYP) |
| Symbol |
VB |
Vs |
ILmax |
Vcmax／Ipp |
|
C |
| Condition |
It＝1mA |
D.C. |
Vs |
10/1000μs |
8/20μs |
25℃〜50℃ |
|
| Unit |
V |
V |
μA |
V |
A |
V |
A |
%/℃ |
pF |
| ZD015 |
15(12.8〜 17.2) |
11.4 |
10 |
24.0 |
10.4 |
31.0 |
96.7 |
0.075 |
31.5 |
| ZD018 |
18(15.3〜 20.7) |
13.7 |
28.0 |
8.93 |
36.0 |
83.3 |
0.079 |
31.0 |
| ZD022 |
22(18.7〜 25.3) |
16.8 |
5 |
33.2 |
7.53 |
43.0 |
69.7 |
0.082 |
29.0 |
| ZD027 |
27(23.0〜 31.0) |
20.6 |
40.0 |
6.25 |
52.0 |
57.7 |
0.085 |
28.2 |
| ZD033 |
33(28.1〜 37.9) |
25.2 |
48.6 |
5.14 |
63.0 |
47.6 |
0.087 |
27.2 |
| ZD039 |
39(33.2〜 44.8) |
29.8 |
57.4 |
4.35 |
74.0 |
40.5 |
0.090 |
26.3 |
| ZD047 |
47(40.0〜 54.0) |
35.9 |
68.5 |
3.65 |
89.0 |
33.7 |
0.092 |
25.0 |
| ZD056 |
56(47.6〜 64.4) |
42.8 |
81.0 |
3.08 |
106 |
28.6 |
0.094 |
24.1 |
| ZD068 |
68(57.8〜 78.2) |
52.0 |
98.0 |
2.55 |
127 |
23.8 |
0.096 |
22.0 |
(Ta=25℃)
