UDZ18B [ROHM]
Zener diode; 稳压二极管
ROHM 
UDZ Series
Diodes
Zener diode
UDZ Series
!Applications
!External dimensions (Units : mm)
Constant voltage control
CATHODE MARK
!Features
1) Compact, 2-pin mini-mold type for high-density
mounting. (UMD2)
+0.1
0.1
0.3±0.05
−0.05
1.25±0.1
(All pins have the same dimensions.)
2) Compatible with chip mounter for automated
production.
+0.2
0.7
−0.1
∗ Type No. and date of manufacture stamped on body in digital marking.
3) High reliability
ROHM : UMD2
EIAJ : SC-76
JEDEC : SOD-323
!Construction
Silicon epitaxial planar
!Absolute maximum ratings (Ta=25°C)
Parameter
Power dissipation
Symbol
P
Limits
200
Unit
mW
˚C
Junction temperature
Storage temperature
Operating temperature
Tj
150
Tstg
Topr
−55∼+150
−55∼+150
˚C
˚C
!Markings (Type No.)
Product name
UDZ 2.0B
UDZ 2.2B
UDZ 2.4B
UDZ 2.7B
UDZ 3.0B
UDZ 3.3B
UDZ 3.6B
UDZ 3.9B
UDZ 4.3B
UDZ 4.7B
UDZ 5.1B
(Ex.) UDZ 2.0B
0
Type No.
Product name
UDZ 5.6B
Type No.
Product name
UDZ 16B
Type No.
0
1
2
3
4
5
6
7
8
9
A
2
2
2
2
2
2
2
2
2
2
2
C
E
F
H
J
2
2
2
2
2
2
5
5
5
5
5
5
6
5
5
5
5
5
5
5
5
5
UDZ 6.2B
UDZ 6.8B
UDZ 7.5B
UDZ 8.2B
UDZ 9.1B
UDZ 10B
UDZ 11B
UDZ 12B
UDZ 13B
UDZ 15B
UDZ 18B
UDZ 20B
UDZ 22B
UDZ 24B
UDZ 27B
UDZ 30B
UDZ 33B
UDZ 36B
7
8
9
L
0
1
2
3
4
A
C
E
F
2
UDZ Series
Diodes
!Electrical characteristics (Ta=25°C)
Operating
resistance
Rising operating
resistance
Reverse current
Zener voltage subdivision
(V)
Type
V
Z
Z
Z
Z
zk
I
R
I
Z
(Ω)
I
Z
(Ω)
I
Z
(µA)
VR
Min.
Max.
(mA)
5
Max.
(mA)
5
Max.
(mA)
0.5
Max.
(V)
0.5
UDZ 2.0B
2.020
2.200
100
100
100
110
120
120
100
100
100
100
80
1000
1000
1000
1000
1000
1000
1000
1000
1000
800
500
200
100
60
120
120
120
100
50
UDZ 2.2B
UDZ 2.4B
UDZ 2.7B
UDZ 3.0B
UDZ 3.3B
UDZ 3.6B
UDZ 3.9B
UDZ 4.3B
UDZ 4.7B
UDZ 5.1B
UDZ 5.6B
UDZ 6.2B
UDZ 6.8B
UDZ 7.5B
UDZ 8.2B
UDZ 9.1B
UDZ 10B
UDZ 11B
UDZ 12B
UDZ 13B
UDZ 15B
UDZ 16B
UDZ 18B
UDZ 20B
UDZ 22B
UDZ 24B
UDZ 27B
UDZ 30B
UDZ 33B
UDZ 36B
1. The Zener voltage (V
2.220
2.430
2.690
3.010
3.320
3.600
3.890
4.170
4.550
4.980
5.490
6.060
6.650
7.280
8.020
8.850
9.770
10.760
11.740
12.910
14.340
15.850
17.560
19.520
21.540
23.720
26.190
29.190
32.150
35.070
2.410
2.630
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
0.5
0.5
0.5
0.5
0.5
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.7
1.0
2.910
1.0
3.220
1.0
3.530
20
1.0
3.845
10
1.0
4.160
5
1.0
4.430
5
1.0
4.750
2
1.0
5.200
2
1.5
5.730
60
1
2.5
6.330
60
1
3.0
6.930
40
0.5
0.5
0.5
0.5
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
3.5
7.600
30
60
4.0
8.360
30
60
5.0
9.230
30
60
6.0
10.210
11.220
12.240
13.490
14.980
16.510
18.350
20.390
22.470
24.780
27.530
30.690
33.790
36.870
30
60
7.0
30
60
8.0
30
80
9.0
37
80
10.0
11.0
12.0
13.0
15.0
17.0
19.0
21.0
23.0
25.0
27.0
42
80
50
80
65
80
85
100
100
120
150
200
250
300
100
120
150
200
250
300
z
) is measured 40 ms after power is supplied.
2. The operating resistances (Z , Zzk) are measured by superimposing a minute alternating current on the regulated current (Iz).
z
UDZ Series
Diodes
!Electrical characteristic curves (Ta=25°C)
100m
10m
1m
100µ
10µ
1µ
100n
10n
0
5
10
15
20
25
30
35
40
ZENER VOLTAGE : VZ (V)
Fig.1 Zener voltage characteristics
0.10
300
Iz=5mA
0.08
0.06
Iz=500µA
0.04
200
100
0
0.02
0.00
2
10
20
30
−0.02
−0.04
−0.06
ZENER VOLTAGE : Vz (V)
−0.08
0
25
50
100
150
AMBIENT TEMPERATURE : Ta (˚C)
Fig.2 Derating curve
Fig.3 Zener voltage -
temp.coefficient characteristics
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