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1N5221B---1N5279B  
GALAXY ELECTRICAL  
BL  
POWER DISSIPATION: 500 mW  
ZENER DIODES  
FEATURES  
DO-35(GLASS)  
Silicon planar power zener diodes  
Standard Zener voltage tolerance is ±5%. With a "B"  
suffix. Other tolerances are available upon request.  
MECHANICAL DAT A  
Case:DO-35, Glass Case  
Terminals: Solderable per MIL-STD-202, Method 208  
Polarity: Cathode Band  
Marking: Type Number  
Approx. Weight: 0.13 grams.  
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS  
Ratings at 25 ambient temperature unless otherwise specified.  
Single phase,half wave,60 Hz,resistive or inductive load. For capacitive load,derate by20%.  
SYMBOL  
VALUE  
UNIT  
mW  
Zener current (see Table "Characteristics")  
5001)  
175  
Ptot  
TJ  
Power dissipation at Tamb=25  
Junction temperature  
Ts  
-55---+175  
Storage temperature range  
SYMBOL  
RθJA  
MIN  
TYP  
MAX  
3001)  
1.2  
UNIT  
/W  
Thermal resistance junction to ambient  
Forw ard voltage at IF=200mA  
V
V
F
NOTES: (1) Valid provided that leads at a distance of 10 mm from case are kept at ambient temperature.  
www.galaxycn.com  
BLGALAXY ELECTRICAL  
1.  
Document Number 0284001  
ELECTRICAL CHARACTERISTICS (TA=25℃)  
Typical  
Maximum Dynamic  
Impedance1)  
Nominal Zener  
Voltage1)  
Maximum Reverse  
Leakage Current  
Test  
Temperature  
of Coeffizient  
Current  
Type  
ZZK@  
IZK=0.25mA  
VZ  
V
IZT  
ZZT@IZT  
αVZ@IZT  
IRM  
VR  
V
mA  
Ω
Ω
µ A  
%/℃  
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  
1N5268B  
1N5269B  
1N5270B  
1N5271B  
1N5272B  
1N5273B  
1N5274B  
1N5275B  
1N5276B  
1N5277B  
1N5278B  
1N5279B  
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  
20  
20  
30  
30  
1200  
1250  
1300  
1400  
1600  
1600  
1700  
1900  
2000  
1900  
1600  
1600  
1600  
1000  
750  
-0.085  
-0.085  
100  
100  
75  
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  
20  
30  
-0.080  
20  
30  
-0.080  
75  
20  
29  
-0.075  
50  
20  
28  
-0.070  
25  
20  
24  
-0.065  
15  
20  
23  
-0.060  
10  
20  
22  
-0.055  
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  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
0.1  
20  
19  
﹢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  
﹢0.098  
﹢0.099  
﹢0.099  
﹢0.099  
﹢0.11  
20  
17  
20  
11  
20  
7.0  
7.0  
5.0  
6.0  
8.0  
8.0  
10  
20  
20  
20  
500  
20  
500  
20  
600  
20  
600  
20  
17  
600  
11  
20  
22  
600  
12  
20  
30  
600  
13  
10  
13  
600  
14  
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  
1.5  
1.4  
1.4  
1.3  
1.1  
1.0  
0.95  
0.90  
0.95  
0.80  
0.74  
0.68  
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  
330  
370  
400  
500  
750  
900  
1100  
1300  
1500  
1700  
1900  
2200  
1000  
1100  
1300  
1400  
1400  
1600  
1700  
2000  
2200  
2300  
2600  
3000  
4000  
4500  
4500  
5000  
5500  
5500  
6000  
36  
51  
39  
56  
43  
60  
46  
62  
47  
68  
52  
75  
56  
85  
62  
87  
68  
91  
69  
100  
110  
120  
130  
140  
150  
160  
170  
180  
76  
84  
﹢0.11  
91  
﹢0.11  
99  
﹢0.11  
106  
114  
122  
129  
137  
﹢0.11  
﹢0.11  
﹢0.11  
﹢0.11  
1)Based on dc-measurement at thermal equilibrium; lead length=9.5(3/8");thermal resistance of heat sink=30K/W  
www.galaxycn.com  
Document Number 0284001  
BLGALAXY ELECTRICAL  
2.  
RATINGS AND CHARACTERISTIC CURVES  
1N5221B---1N5279B  
FIG.1 -- BREAKDOWN CHARACTERISTICS  
mA  
5
10  
15  
20  
25  
30 V  
50  
40  
I
Z
Test current  
Iz=20mA  
30  
20  
10  
0
V
Z
FIG.2 -- ADMISSIBLE POWER DISSIPATION VERSUS AMBIENT TEMPERATURE  
mW  
500  
400  
Ptot  
300  
200  
100  
0
℃
200  
0
100  
Tamb  
www.galaxycn.com  
3.  
BLGALAXY ELECTRICAL  
Document Number 0284001