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ZENER DIODES  
1N5221B - 1N5267B  
DO - 35 Glass  
(DO-204AH)  
VZ : 2.4 - 75V  
PD : 500mW  
1.00 (25.4)  
FEATURES :  
0.079(2.0 )max.  
min.  
• Silicon planar power zener diodes.  
• Standard zener voltage tolerance is ± 5%.  
• Other tolerances are available upon request.  
• These diodes are also available in MiniMELF case with  
the type designation ZMM5221B ... ZMM5267B  
• Pb / RoHS Free  
0.150 (3.8)  
max.  
Cathode  
Mark  
1.00 (25.4)  
min.  
0.020 (0.52)max.  
MECHANICAL DATA :  
Case: DO-35 Glass Case  
Weight: approx. 0.13g  
Dimensions in inches and ( millimeters )  
Maximum Ratings and Thermal Characteristics  
Rating at 25 °C ambient temperature unless otherwise specified.  
Parameter  
Symbol  
Value  
Unit  
Zener Current see Table "Characteristics"  
Maximum Forward Voltage at IF = 200 mA.  
Power Dissipation at Ta = 75 °C  
Thermal Resistance Junction to Ambient Air  
Junction temperature  
VF  
PD  
1.1  
V
mW  
°C/W  
°C  
500(1)  
300(1)  
Rq  
JA  
TJ  
175  
TS  
Storage temperature range  
-65 to + 175  
°C  
Note:  
(1) Valid provided that leads at a distance of 3/8” from case are kept at ambient temperature.  
Page 1 of 2  
Rev. 04 : September 2, 2005  
Electrical Characteristics (Ta = 25°C)  
Maximum Zener  
Nominal Zener  
Voltage  
Test  
Maximum Reverse  
Leakage Current Temperature Regulator  
Typical  
Maximum  
Impedance (1)  
Current  
Current(2)  
Type  
ZZK  
Coefficient  
VZ @ IZT  
IZT  
ZZT @ IZT  
at IZK = 0.25mA  
IR  
@
VR  
(V)  
IZM  
a
VZ(%/ °C)  
(V)  
(mA)  
(mA)  
(W)  
(W)  
(mA)  
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  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
22  
24  
25  
27  
28  
30  
33  
36  
39  
43  
47  
51  
56  
60  
62  
68  
75  
20  
20  
20  
20  
20  
30  
30  
30  
30  
29  
28  
24  
23  
22  
19  
17  
11  
7
1200  
1250  
1300  
1400  
1600  
1600  
1700  
1900  
2000  
1900  
1600  
1600  
1600  
1000  
750  
100  
100  
75  
75  
50  
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  
11  
-0.085  
-0.085  
-0.080  
-0.080  
-0.075  
-0.070  
-0.065  
-0.060  
190  
182  
168  
162  
152  
138  
126  
115  
106  
97  
20  
25  
20  
15  
20  
10  
20  
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  
± 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  
+0.088  
+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  
20  
20  
89  
20  
81  
20  
76  
20  
7
73  
20  
5
67  
20  
6
500  
61  
20  
8
500  
55  
20  
8
600  
52  
20  
10  
17  
22  
30  
13  
15  
16  
17  
19  
21  
23  
25  
29  
33  
35  
41  
44  
49  
58  
70  
80  
93  
105  
125  
150  
170  
185  
230  
270  
600  
50  
20  
600  
45  
20  
600  
41  
20  
600  
38  
9.5  
9.0  
8.5  
7.8  
7.4  
7.0  
6.6  
6.2  
5.6  
5.2  
5
600  
35  
600  
32  
600  
30  
600  
12  
28  
600  
13  
27  
600  
14  
25  
600  
14  
24  
600  
15  
23  
600  
17  
21  
600  
18  
19.1  
18.2  
16.8  
16.2  
15.1  
13.8  
12.6  
11.6  
10.6  
9.7  
8.9  
-
600  
19  
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  
600  
21  
600  
21  
600  
23  
700  
25  
700  
27  
800  
30  
900  
33  
1000  
1100  
1300  
1400  
1400  
1600  
1700  
36  
39  
43  
46  
-
47  
-
52  
-
56  
-
Notes :  
(1) The Zener impedance is derived from the 1 kHz AC voltage which results when an AC current having an RMS value equal  
to 10% of the Zener current (IZT or IZK) is superimposed on IZT or IZK. Zener impedance is measured at two points to insure  
a sharp knee on the breakdown curve and to eliminate unstable units  
(2) Valid provided that leads at a distance of 10 mm from case are kept at ambient temperature  
(3) Standard Zener voltage tolerance is ± 5% tolerance.  
Page 2 of 2  
Rev. 04 : September 2, 2005