SMA5921B series
Surface Mount Zener Diodes
P b
Lead(Pb)-Free
Features:
* 1.5W Power Dissipation
* For Surface Mounted Applications
* Zener Breakdown Voltage Range 6.8V to 68V
Mechanical Data
* Case: Molded plastic SMA/DO-214AC
* Epoxy: UL 94V-0 rate flame retardant
* Terminals: Solderable per MIL-STD-750 method 2026
* Polarity: cathode band
* Mounting position: Any
* Weight: 0.064 gram
SURFACE MOUNT
ZENER DIODES
1.5 WATTS
SMA
SMA Outline Dimension
B
unit:mm
SMA
A
D
J
G
H
E
C
Dim
A
B
C
D
E
G
H
J
Min
2.20
4.00
1.27
0.15
4.48
0.10
0.76
1.70
Max
2.92
4.60
1.63
0.31
5.59
0.20
1.52
2.62
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SMA5921B series
Maximum Ratings
(TA=25 C
Unless Otherwise Noted)
Characteristics
Half sine-wave superimposed on rated load
1
(JEDEC method)
Power Dissipation
2
Maximun junction Temperature
Storage Temperature Range
Symbol
I
FSM
Value
10
1.5
150
-55 to +150
Unit
A
W
°C
°C
P
D
Tj
T
STG
NOTES : (1) Measurd on 8.3ms, single half-sine wave or equivalent square wave, duty cycle = 4 pulses per minute maximum.
(2) Mounted on 5.0mm2(.013mm thick) land areas.
Electrical Characteristic (Ta=25°C)
Part No.
SMA5921B
SMA5922B
SMA5923B
SMA5924B
SMA5925B
SMA5926B
SMA5927B
SMA5928B
SMA5929B
SMA5930B
SMA5931B
SMA5932B
SMA5933B
SMA5934B
SMA5935B
SMA5936B
SMA5937B
SMA5938B
SMA5939B
SMA5940B
SMA5941B
SMA5942B
SMA5943B
SMA5944B
SMA5945B
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
(
mA )
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
Iz
T
Z
ZT
(Ω)
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
Z
ZK
(Ω)
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
( mA )
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
I
ZK
(μA)
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
I
R
＠
V
R
(V)
5.2
6.0
6.5
7.0
8.0
8.4
9.1
9.9
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
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
Suffix B for 5%
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SMA5921B series
Typical Characteristi
cs
P
D
, MAXIMUM POWER DISSIPATION (WATTS)
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)
FIG 1. STEADY STATE POWERDERATING
V
Z
, TEMPERATURE COEFFICIENT (mV/°C)
FIG 2. ZENER VOLTAGE-TO 12 VOLTS
1000
TJ - 25°C
IZ(ms) = 0.1 IZ(dc)
VZ = 150V
120
100
80
60
40
20
0
VZ@IZT
ZZ, DYNAMIC IMPEDANCE (OHMS)
100
91V
62V
10
22V
12V
0
20
40
60
80
100 120 140 160 180 200
1
0.5
1
1.0
100
6.8V
100
V
Z
, ZENERVOLTAGE(VOLTS)
I
Z
, ZENER TEST CURRENT (mA)
FIG 3. ZENER VOLTAGE-10 TO 12 VOLTS
1K
200
100
70
50
30
20
10mA
10
7
5
3
FIG 4. EFFECT OF ZENER CURRENT
PPK, PEAK SURGE POWER (watts)
RECTANGULAR NONREPETITIVE
WAVEFORM TJ = 25oC PRIOR TO
INITIAL PULSE
ZZ, DYNAMIC IMPEDANCE (ohms)
Iz(dc) =1mA
500
300
200
100
50
30
20
10
0.1 0.2 0.3
5
2
20mA
7
10
20
30
Iz(ms) = 0.1Iz(dc)
50
70
100
5
1
2 3 5
0
20
50
100
Fig 5. VZ = 6.8 THRU10VOLTS
100
IZ, ZENER CURRENT (mA)
IZ, ZENER CURRENT (mA)
100
50
30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
0
VZ, ZENER VOLTAGE (VOLTS)
Fig 6.VZ=12 THRU 82 VOLTS
P
W
, PULSE WIDTH (ms)
50
30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
0
1
2
3
4
5
6
7
8
9
10
10
20
30
40
50
60
70
80
90
100
Fig.7 VZ, ZENER VOLTAGE (VOLTS)
Fig.8 VZ, ZENER VOLTAGE (VOLTS)
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stm32/stm8
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