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Zeners  
1N5221B - 1N5279B  
Tolerance = 5%  
Absolute Maximum Ratings*  
TA = 25°C unless otherwise noted  
Symbol  
Parameter  
Value  
Units  
PD  
Power Dissipation  
500  
4.0  
mW  
mW/°C  
Derate above 75°C  
TSTG  
TJ  
Storage Temperature Range  
-65 to +200  
C
°
Maximum Junction Operating Temperature  
+ 200  
+ 230  
°C  
Lead Temperature (1/16” from case for 10  
seconds)  
C
°
*These ratings are limiting values above which the serviceability of the diode may be impaired.  
**Non-recurrent square wave PW= 8.3 ms, TA= 50 degrees C.  
DO-35 Glass case  
COLOR BAND DENOTES CATHODE  
NOTES:  
1) These ratings are based on a maximum junction temperature of 200 degrees C.  
2) These are steady state limits. The factory should be consulted on applications involving pulsed  
or low duty cycle operations.  
Electrical Characteristics  
TA = 25°C unless otherwise noted  
VZ  
(V)  
ZZ  
IZ  
(mA)  
ZZK  
IZK  
(mA)  
IR  
VR  
(V)  
TC  
@
@
@
Device  
Ω
Ω
µ
°
(
)
(
)
( A)  
(%/ C)  
1N5221B  
1N5222B  
1N5223B  
1N5224B  
1N5225B  
1N5226B  
1N5227B  
1N5228B  
1N5229B  
1N5230B  
1N5231B  
1N5232B  
1N5233B  
1N5234B  
1N5235BT  
1N5236BT  
1N5237BT  
1N5238BT  
1N5239BT  
1N5240BT  
1N5241BT  
1N5242BT  
1N5243BT  
1N5244BT  
1N5245BT  
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  
30  
30  
30  
30  
29  
28  
24  
23  
22  
19  
17  
11  
7.0  
7.0  
5.0  
6.0  
8.0  
8.0  
10  
17  
22  
30  
13  
15  
16  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
9.5  
9.0  
8.5  
1,200  
1,250  
1,300  
1,400  
1,600  
1,600  
1,700  
1,900  
2,000  
1,900  
1,600  
1,600  
1,600  
1,000  
750  
500  
500  
600  
600  
600  
600  
600  
600  
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  
0.25  
100  
100  
75  
75  
50  
25  
15  
10  
5.0  
2.0  
2.0  
3.0  
3.5  
4.0  
5.0  
6.0  
6.5  
6.5  
7.0  
8.0  
8.4  
0.1  
0.1  
0.1  
0.1  
1.0  
1.0  
1.0  
1.0  
1.0  
1.0  
1.0  
1.0  
1.0  
1.0  
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  
- 0.07  
- 0.065  
- 0.06  
+/- 0.055  
+/- 0.03  
+/- 0.03  
0.038  
0.038  
0.045  
0.05  
0.058  
0.062  
0.065  
0.068  
0.075  
11  
12  
13  
14  
0.076  
0.077  
0.079  
0.080  
600  
600  
15  
11  
0.082  
2003 Fairchild Semiconductor Corporation  
1N5221B-1N5279B Rev. E  
Zeners (1N5221B - 1N5279B)  
(continued)  
Electrical Characteristics (Continued)  
TA = 25°C unless otherwise noted  
VZ  
(V)  
ZZ  
IZ  
(mA)  
ZZK  
IZK  
(mA)  
VR  
(V)  
IR  
TC  
@
@
@
Device  
Ω
Ω
µ
°
(
)
(
)
( A)  
(%/ C)  
1N5246BT  
1N5247BT  
1N5248BT  
1N5249BT  
1N5250BT  
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  
16  
17  
18  
19  
20  
22  
24  
25  
27  
28  
30  
33  
36  
39  
43  
47  
51  
56  
60  
62  
68  
75  
85  
87  
91  
100  
110  
120  
130  
140  
150  
160  
170  
180  
17  
19  
21  
23  
25  
29  
33  
35  
41  
44  
49  
58  
70  
80  
93  
105  
125  
150  
170  
185  
230  
270  
330  
370  
400  
500  
750  
900  
1100  
1300  
1500  
1700  
1900  
2200  
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  
0.85  
0.80  
0.74  
0.68  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
700  
700  
800  
900  
1000  
1100  
1300  
1400  
1400  
1600  
1700  
2000  
2200  
2300  
2600  
3000  
4000  
4500  
4500  
5000  
5500  
5500  
6000  
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  
0.25  
0.25  
0.25  
0.25  
0.25  
0.25  
0.25  
0.25  
0.25  
0.25  
12  
13  
14  
14  
15  
17  
18  
19  
21  
21  
23  
25  
27  
30  
33  
36  
39  
43  
46  
47  
52  
56  
62  
68  
69  
76  
84  
91  
99  
106  
114  
122  
129  
137  
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  
0.083  
0.084  
0.085  
0.085  
0.086  
0.087  
0.088  
0.088  
0.089  
0.090  
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  
0.11  
0.11  
0.11  
0.11  
0.11  
0.11  
0.11  
VF Forward Voltage = 1.2 V Max. @ IF = 200 mA  
2003 Fairchild Semiconductor Corporation  
1N5221B-1N5279B Rev. E  
TRADEMARKS  
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is  
not intended to be an exhaustive list of all such trademarks.  
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PACMAN™  
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SPM™  
ImpliedDisconnect™  
ISOPLANAR™  
LittleFET™  
FACT™  
ActiveArray™  
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CoolFET™  
CROSSVOLT™  
DOME™  
Stealth™  
FACT Quiet Series™  
FAST  
Power247™  
PowerTrench  
QFET  
SuperSOT™-3  
SuperSOT™-6  
SuperSOT™-8  
SyncFET™  
MicroFET™  
MicroPak™  
MICROWIRE™  
MSX™  
FASTr™  
FRFET™  
QS™  
GlobalOptoisolator™  
GTO™  
EcoSPARK™  
E2CMOSTM  
EnSignaTM  
QT Optoelectronics™ TinyLogic  
Quiet Series™  
RapidConfigure™  
RapidConnect™  
TruTranslation™  
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FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER  
NOTICE TOANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD  
DOES NOTASSUMEANY LIABILITYARISING OUT OF THEAPPLICATION OR USE OFANY PRODUCT  
OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT  
RIGHTS, NOR THE RIGHTS OF OTHERS.  
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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT  
DEVICES OR SYSTEMS WITHOUTTHE EXPRESS WRITTENAPPROVALOF FAIRCHILD SEMICONDUCTOR CORPORATION.  
As used herein:  
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systems which, (a) are intended for surgical implant into  
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failure to perform when properly used in accordance  
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user.  
2. A critical component is any component of a life  
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PRODUCT STATUS DEFINITIONS  
Definition of Terms  
Datasheet Identification  
Product Status  
Definition  
Advance Information  
Formative or  
In Design  
This datasheet contains the design specifications for  
product development. Specifications may change in  
any manner without notice.  
Preliminary  
First Production  
This datasheet contains preliminary data, and  
supplementary data will be published at a later date.  
Fairchild Semiconductor reserves the right to make  
changes at any time without notice in order to improve  
design.  
No Identification Needed  
Obsolete  
Full Production  
This datasheet contains final specifications. Fairchild  
Semiconductor reserves the right to make changes at  
any time without notice in order to improve design.  
Not In Production  
This datasheet contains specifications on a product  
that has been discontinued by Fairchild semiconductor.  
The datasheet is printed for reference information only.  
Rev. I3