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1N5221B - 1N5267B  
AXIAL LEADED SILICON ZENER DIODES  
VOLTAGE RANGE: 2.4 - 7 5V  
POWER: 0.5Wa t t s  
DO-35(GLASS)  
Features  
500mW Power Dissipation  
High Stability  
!
!
!
!
Low Noise  
Surface Mount Equivalents Available  
1.0 2(26.0)  
MIN.  
0.079(2.0)  
Hermetic Package  
!
MAX  
0.165 (4.2)  
MAX  
Mechanical Data  
!
!
Case: DO-35, Glass  
Terminals: Solderable per MIL-STD-202,  
Method 208  
Polarity: Cathode Band  
1.0 2(26.0)  
MIN.  
0.020(0.52)  
TYP  
!
!
Marking: Type Number  
!
Weight: 0.13 grams (approx.)  
Dimensions in millimeters  
Maximum Ratings and Electrical Characteristics  
TA = 25ꢀC unless otherwise specified  
Characteristic  
Symbol  
Pd  
Value  
500  
Unit  
mW  
°C/W  
V
Power Dissipation (Note 1)  
RqJA  
VF  
Thermal Resistance, Junction to Ambient Air (Note 1)  
300  
Forward Voltage  
@ IF = 200mA  
1.1  
Tj, TSTG  
°C  
Operating and Storage Temperature Range  
-65 to +200  
Notes:  
1. Valid provided that leads are kept at TL £75°C with lead length = 9.5mm (3/8”) from case; derate above 75°C.  
1 of 2  
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@ TA = 25°C unless otherwise specified  
Electrical Characteristics  
Zener Voltage Range  
(Note 2)  
Test  
Maximum Zener  
Impedance  
Maximum Reverse  
Current  
Maximum  
Temperature  
Coefficient  
@ IZT  
Current  
Type  
Number  
ZZK @ IZK  
=
VZ @ IZT  
IZT  
ZZT @ IZT  
IR  
@VR  
0.25mA  
Nom (V)  
Min (V)  
2.28  
Max (V)  
mA  
20  
W
30  
W
µA  
100  
100  
75  
V
%/°C  
1N5221B  
1N5222B  
1N5223B  
1N5224B  
1N5225B  
1N5226B  
1N5227B  
1N5228B  
1N5229B  
1N5230B  
1N5231B  
1N5232B  
1N5233B  
1N5234B  
1N5235B  
1N5236B  
1N5237B  
1N5238B  
1N5239B  
1N5240B  
1N5241B  
1N5242B  
1N5243B  
1N5244B  
1N5245B  
1N5246B  
1N5247B  
1N5248B  
1N5249B  
1N5250B  
1N5251B  
1N5252B  
1N5253B  
1N5254B  
1N5255B  
1N5256B  
1N5257B  
1N5258B  
1N5259B  
1N5260B  
1N5261B  
1N5262B  
1N5263B  
1N5264B  
1N5265B  
1N5266B  
1N5267B  
2.4  
2.5  
2.7  
2.8  
3.0  
3.3  
3.6  
3.9  
4.3  
4.7  
5.1  
5.6  
6.0  
6.2  
6.8  
7.5  
8.2  
8.7  
9.1  
10  
2.52  
2.63  
1200  
1250  
1300  
1400  
1600  
1600  
1700  
1900  
2000  
1900  
1600  
1600  
1600  
1000  
750  
1.0  
1.0  
1.0  
1.0  
1.0  
1.0  
1.0  
1.0  
1.0  
2.0  
2.0  
3.0  
3.5  
4.0  
5.0  
6.0  
6.5  
6.5  
7.0  
8.0  
8.4  
9.1  
9.9  
10  
-0.085  
-0.085  
-0.080  
-0.080  
-0.075  
-0.070  
-0.065  
-0.060  
+0.055  
+0.030  
+0.030  
+0.038  
+0.038  
+0.045  
+0.050  
+0.058  
+0.062  
+0.065  
+0.068  
+0.075  
+0.076  
+0.077  
+0.079  
+0.082  
+0.082  
+0.083  
+0.084  
+0.085  
+0.086  
+0.086  
+0.087  
+0.087  
+0.089  
+0.090  
+0.091  
+0.091  
+0.092  
+0.093  
+0.094  
+0.095  
+0.095  
+0.096  
+0.096  
+0.097  
+0.097  
+0.097  
+0.098  
2.38  
20  
30  
2.57  
2.84  
20  
30  
2.66  
2.94  
20  
30  
75  
2.85  
3.15  
20  
29  
50  
3.14  
3.47  
20  
28  
25  
3.42  
3.78  
20  
24  
15  
3.71  
4.10  
20  
23  
10  
4.09  
4.52  
20  
22  
5.0  
5.0  
5.0  
5.0  
5.0  
5.0  
3.0  
3.0  
3.0  
3.0  
3.0  
3.0  
2.0  
1.0  
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  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
4.47  
4.94  
20  
19  
4.85  
5.36  
20  
17  
5.32  
5.88  
20  
11  
5.70  
6.30  
20  
7.0  
7.0  
5.0  
6.0  
8.0  
8.0  
10  
5.89  
6.51  
20  
6.46  
7.14  
20  
7.13  
7.88  
20  
500  
7.79  
8.61  
20  
500  
8.27  
9.14  
20  
600  
8.65  
9.56  
20  
600  
9.50  
10.50  
11.55  
12.60  
13.65  
14.70  
15.75  
16.80  
17.85  
18.90  
19.95  
21.00  
23.10  
25.20  
26.25  
28.35  
29.40  
31.50  
34.65  
37.80  
40.95  
45.15  
49.35  
53.55  
58.80  
63.00  
65.10  
71.40  
78.75  
20  
17  
600  
11  
10.45  
11.40  
12.35  
13.30  
14.25  
15.20  
16.15  
17.10  
18.05  
19.00  
20.90  
22.80  
23.75  
25.65  
26.60  
28.50  
31.35  
34.20  
37.05  
40.85  
44.65  
48.45  
53.20  
57.00  
58.90  
64.60  
71.25  
20  
22  
600  
12  
20  
30  
600  
13  
9.5  
9.0  
8.5  
7.8  
7.4  
7.0  
6.6  
6.2  
5.6  
5.2  
5.0  
4.6  
4.5  
4.2  
3.8  
3.4  
3.2  
3.0  
2.7  
2.5  
2.2  
2.1  
2.0  
1.8  
1.7  
13  
600  
14  
15  
600  
15  
16  
600  
11  
16  
17  
600  
12  
17  
19  
600  
13  
18  
21  
600  
14  
19  
23  
600  
14  
20  
25  
600  
15  
22  
29  
600  
17  
24  
33  
600  
18  
25  
35  
600  
19  
27  
41  
600  
21  
28  
44  
600  
21  
30  
49  
600  
23  
33  
58  
700  
25  
36  
70  
700  
27  
39  
80  
800  
30  
43  
93  
900  
33  
47  
105  
125  
150  
170  
185  
230  
270  
1000  
1100  
1300  
1400  
1400  
1600  
1700  
36  
51  
39  
56  
43  
60  
46  
62  
47  
68  
52  
75  
56  
Notes:  
2. Based on dc measurement at thermal equilibrium; lead length = 9.5mm (3/8”); thermal resistance of heat sink = 30°C/W.  
2 of 2  
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