Data Sheet
1.5 WATTS
Surface Mount Zener Diode
o
1SMA5921B
THRU SMA5945B
Part No.
1SMA5921B
1SMA5922B
1SMA5923B
1SMA5924B
1SMA5925B
1SMA5926B
1SMA5927B
1SMA5928B
1SMA5929B
1SMA5930B
1SMA5931B
1SMA5932B
1SMA5933B
1SMA5934B
1SMA5935B
1SMA5936B
1SMA5937B
1SMA5938B
1SMA5939B
1SMA5940B
1SMA5941B
1SMA5942B
1SMA5943B
1SMA5944B
1SMA5945B
Vz
(V)
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
56
62
68
Electrical Characteristic (Ta=25 C)
IR(uA) Max.
Iz
T
Z
ZT
Z
ZK
I
ZK
( mA ) (Ohm) (Ohm) ( mA )
V
R
(V)
55.1
50.0
45.7
41.2
37.5
34.1
31.2
28.8
25.0
23.4
20.8
18.7
17.0
15.6
13.9
12.5
11.4
10.4
9.6
8.7
8.0
7.3
6.7
6.0
5.5
2.5
3.0
3.5
4.0
4.5
5.5
6.5
7.0
9.0
10
12
14
17.5
19
23
26
33
38
45
53
67
70
86
100
120
200
400
400
500
500
550
550
550
600
600
650
650
650
700
700
750
800
850
900
950
1000
1100
1300
1500
1700
1.0
0.5
0.5
0.5
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
2.5
2.5
2.5
2.5
2.5
2.5
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
5.2
6.0
6.5
7.0
8.0
8.4
9.1
9.9
11.4
12.2
13.7
15.2
16.7
18.2
20.6
22.8
25.1
27.4
29.7
32.7
35.8
38.8
42.6
47.1
51.7
Surge
Current
( mA )
221
200
183
165
150
136
125
115
100
94
83
75
68
63
56
50
45
42
38
35
32
29
27
24
22
Suffix B for 5%, Suffix "A" for 10%
FIG 1. STEADY STATE POWERDERATING
P
D
, MAXIMUM POWER DISSIPATION (WATTS)
FIG 2. ZENER VOLTAGE-TO 12 VOLTS
V
Z
, TEMPERATURE COEFFICIENT (mV/°C)
5
4
1.5
1.0
0.5
0
8
6
4
2
0
-2
-4
3
VZ@IZT
0
25
50
75
100
125
150
175
4
5
6
7
8
9
10
11
12
T
L
,LEADTEMPERATURE(°C)
V
Z
,ZENERVOLTAGE(VOLTS)