SURFACE MOUNT ZENER DIODE
COMCHIP
www.comchip.com.tw
CZRA4741 - CZRA4764
Voltage:
11- 100
Volts
Power: 1.0 Watts
FEATURES
- For surf ace mounted applications in order to
optimize board space
- Low profile package
- Built-in strain relief
- Glass passiv ated junction
- Low inductance
- Typical I
R
less than 5.0uA above 11V
- High temper ature soldering :
260°C / 10 seconds at terminals
- Plastic package has Underwriters Laboratory
Flammability Classification 94V-O
U
DO-214AC (SMA)
0.067(1.70)
0.051(1.29)
0.180(4.57)
0.160(4.06)
0.110(2.79)
0.086(2.18)
0.012(0.31)
0.006(0.15)
0.091(2.31)
0.067(1.70)
0.059(1.50)
0.035(0.89)
0.008(0.20)
0.004(0.10)
MECHANICAL DATA
Case: JEDEC DO-214AC, Molded plastic
over passivated junction
Terminals: Solder plated, solderable per
MIL-STD-750, method 2026
Polarity: Color band denotes positive end(cathode)
Standard Packaging: 12mm tape(EIA-481)
Weight: 0.002 ounce, 0.064 gram
0.209(5.31)
0.185(4.70)
Dimensions in inches and (millimeters)
Maximum Ratings and Electrical Characterics
Ratings at 25°C ambient temperature unless otherwise specified.
Peak Pulse Power Dissipation on T
A
= 50°C (Note A)
Derate above 50°C
Peak forward Surge Current 8.3ms single half sine-wave
superimposed on rated load(JEDEC Method) (Note B)
Operating Junction and Storage Temperature Range
NOTES:
2
A. Mounted on 5.0mm (.013mm thick) land areas.
B. Measured on 8.3ms, single half sine-wave or equivalent square wave, duty cycle = 4 pulses per minute maximum.
SYMBOL
P
D
I
FSM
T
J
,T
STG
VALUE
1.0
6.67
10
-55 to +150
UNITS
Watts
mW/°C
Amps
°C
MDS0208021A
Page
1
SURFACE MOUNT ZENER DIODE
COMCHIP
www.comchip.com.tw
ELECTRICAL CHARACTERISTICS
(T
A
=25°C unless otherwise noted) (V
F
=1.2Volts Max, I
F
=200mA for all types.)
Device
(Note 1.)
Nominal
Zener
Voltage V
Z
@ I
ZT
(Note 2, 3)
(Volts)
Test
current
I
ZT
(mA)
Maximum Zener Impedance
(Note 4)
Z
ZT
@ I
ZT
Z
ZK
@ I
ZK
(Ohms)
(Ohms)
Leakage Current
I
R
(uA)
Surge Current
@T
A
=25°C
(Note 5)
Ir - mA
I
ZK
(mA)
V
R
(Volts)
CZRA4741
CZRA4742
CZRA4743
CZRA4744
CZRA4745
CZRA4746
CZRA4747
CZRA4748
CZRA4749
CZRA4750
CZRA4751
CZRA4752
CZRA4753
CZRA4754
CZRA4755
CZRA4756
CZRA4757
CZRA4758
CZRA4759
CZRA4760
CZRA4761
CZRA4762
CZRA4763
CZRA4764
NOTE:
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
56
62
68
75
82
91
100
23
21
19
17
15.5
14
12.5
11.5
10.5
9.5
8.5
7.5
7
6.5
6
5.5
5
4.5
4
3.7
3.3
3
2.8
2.5
8
9
10
14
16
20
22
23
25
35
40
45
50
60
70
80
95
110
125
150
175
200
250
350
700
700
700
700
700
750
750
750
750
750
1000
1000
1000
1000
1500
1500
1500
2000
2000
2000
2000
3000
3000
3000
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
0.25
0.25
0.25
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
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
56
62.2
69.2
76
414
380
344
304
285
250
225
205
190
170
150
135
125
115
110
95
90
80
70
65
60
55
50
45
1. Tolerance and Type Number Designation. The type numbers listed have a standard tolerance on the nominal zener
voltage of ± 5%.
2. Specials Available Include:
A. Nominal zener voltages between the voltages shown and tighter voltage tolerances.
B. Matched sets.
3. Zener Voltage (V
Z
) Measurement. Guarantees the zener voltage when measured at 90 seconds while maintaining
the lead temperature (T
L
) at 30°C ± 1°C, from the diode body.
4. Zener Impedance (Z
Z
) Derivation. The zener impedance is derived from the 60 cycle ac voltage, which results when
an ac current having an rms value equal to 10% of the dc zener current (I
ZT
or I
ZK
) is superimposed on I
ZT
or I
ZK
.
5. Surge Current (Ir) Non-Repetitive. The rating listed in the electrical characteristics table is maximum peak,
non-repetitive, reverse surge current of 1/2 square wave or equivalent sine wave pulse of 1/120 second
duration superimposed on the test current, I
ZT
, per JEDEC registration; however, actual device capability
is as described in Figure 5.
MDS0208021A
Page 2
SURFACE MOUNT ZENER DIODE
RATING AND CHARACTERISTICS CURVES
CZRA4741 THRU CZRA4764
P
D
, MAXIMUM POWER DISSIPATION
(WATTS)
COMCHIP
www.comchip.com.tw
1.25
1.0
0.75
0.50
0.25
0
0
L = LEAD LENTGH TO
HEAT SINK
20
40
60 80 100 120 140 160 180 200
TL, LEAD TEMPERATURE
Fig. 1-POWER TEMPERATURE DERATING CURVE
VZ, TEMPERATURE COEFFICIENT
(mV/°C)
100
VZ, TEMPERATURE
COEFFICIENT(mV/W)
70
50
30
20
10
7.0
5.0
3.0
2.0
1.0
10
RANGE
V
Z
@ I
ZT
+12
+10
+8.0
+6.0
+4.0
+2.0
0
-2.0
-4.0
2
V
Z
@ I
ZT
RANGE
3
4
5
6
7
8
9
10 11 12
20
30
50
70
100
VZ, ZENER VOLTAGE (VOLTS)
VZ, ZENER VOLTAGE (VOLTS)
Fig. 2-TEMPERATURE COEFFICIENTS
(-55°C TO +150°C TEMPERATURE RANGE; 90% OF THE UNITS ARE IN THE RANGES INDICATED.)
175
JL, JUNCTION TO LEAD THERMAL
RESISTANCE (°C/W)
150
125
100
75
50
25
0
0
.1
.2
.3
.4 .5
.6 .7 .8 .9 1.0
VZ, TEMPERATURE COEFFICIENT
(mV/w)
+6.0
+4.0
NOTE:BELOW 3 VOLTS AND ABOVE 8
CHANGES IN ZENER CURRENT DO
AFFECT TEMPERATURE
20mA
+2.0
0
-2.0
-4.0
3
1.0mA
0.01mA
V
Z
@ I
ZT
TA = 25°C
6
7
8
4
5
L, LEAD LENGTH TO HEAT SINK (INCKES)
VZ, ZENER VOLTAGE (VOLTS)
Fig.3-TYPICAL THERMAL RESISTANCE VERSUS LEAD
LENGTH
Fig. 4-EFFECT OF ZENER CURRENT
MDS0208021A
Page3
SURFACE MOUNT ZENER DIODE
COMCHIP
www.comchip.com.tw
RATING AND CHARACTERISTICS CURVES
CZRA4741 THRU CZRA4764
Ppk, peak surge power (watts)
100
70
50
5% DUTY CYCLE
30
20
10
7.0
5.0
3.0
2.0
1.0
0.01
20% DUTY CYCLE
10% DUTY CYCLE
11V-91V NON-REPETITIVE
0.8V-10V NON-REPETITIVE
RECTANGULAR WAVEFORM
TJ = 2
5°C
PRIOR TO INITIAL
PULSE
0.02
0.05
0.1
0.2
0.5
1.0
2.0
5.0
10
20
50
100
200
500
PW, PULSE WIDTH
This graph represents 90 percentile data point.
For worst-case design characteristics, multiply surge power by 2/3
Fig. 5-MAXIMUM SURGE POWER
1000
1000
700
500
I = 1.0mA
Z
200
100
5.0mA
70
50
20mA
20
10
7
5
2
1
1.0
Zz, dynamic impedance (ohms)
Zz, dynamic impedance (ohms)
500
200
100
50
20
10
5.0
TJ = 25°C
I
Z
(ms) = 0.1I
Z
(dc)
f = 60Hz
TJ = 25°C
I
Z
(ms) = 0.1I
Z
(dc)
f = 60Hz
47V
27V
0.8V
2.0
1.0
0.1
0.2
0.5
1.0
2.0
5.0
10
20
50
100
2.0 3.0
5.0 7.0
10
20 30
50 70 100
IZ, ZENER CURRENT (mA)
IZ, ZENER CURRENT (mA)
Fig. 6-EFFECT OF ZENER CURRENT ON ZENER
IMPEDANCE
Fig. 7-EFFECT OF ZENER VOLTAGE ON ZENER
IMPEDANCE
MDS0208021A
Page
4
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