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1N5221UR thru 1N5281BUR, e3  
(or MLL5221 thru MLL5281B, e3)  
500 mW GLASS SURFACE MOUNT  
ZENER DIODES  
S C O T T S D A L E D I V I S I O N  
DESCRIPTION  
APPEARANCE  
The 1N5221BUR thru 1N5281BUR series of 0.5 watt Zener Voltage  
Regulators provides a surface mount equivalent to the popular JEDEC  
registered 1N5221B to 1N5281B for 2.4 to 200 volts in standard 5%  
tolerances as well as tighter tolerances identified by different suffix letters on  
the part number. These are also available with an internal-metallurgical-  
bond option by adding a “-1” suffix (see separate data sheet). Microsemi  
also offers numerous other Zener products to meet higher and lower power  
applications.  
DO-213AA  
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com  
FEATURES  
APPLICATIONS / BENEFITS  
•
Surface mount equivalents to the JEDEC registered  
1N5221 thru 1N5281B series  
•
Regulates voltage over a broad operating  
current and temperature range  
•
•
•
Hermetically sealed surface mount package  
•
•
Selection from 2.4 to 200 V  
RoHS Compliant devices available by adding “e3” suffix  
Standard voltage tolerances are plus/minus 5%  
with B suffix identification and 10 % with A suffix  
Tight tolerances available in plus or minus 2%  
or 1% with C or D suffix respectively  
Internal metallurgical bond option available by adding a  
“-1” suffix (see separate data sheet for same part  
numbers with “-1” suffix)  
•
•
DO-7 or DO-35 glass body axial-leaded Zener  
equivalents also available per JEDEC registration (see  
separate data sheet for part numbers 1N5221 thru  
1N5281B series  
•
•
•
Nonsensitive to ESD per MIL-STD-750 Method 1020  
Minimal capacitance (see Figure 3)  
Inherently radiation hard as described in Microsemi  
MicroNote 050  
MAXIMUM RATINGS  
MECHANICAL AND PACKAGING  
•
•
Operating and Storage temperature: -65ºC to +175ºC  
•
CASE: Hermetically sealed glass DO-213AA  
(SOD80 or MLL34) MELF style package  
Thermal Resistance: 150ºC/W junction to end cap  
and 300ºC/W junction to ambient when mounted on  
FR4 PC board (1 oz Cu) with recommended footprint  
(see last page)  
•
FINISH: End caps Tin-Lead or RoHS Compliant  
annealed matte-Tin plating solderable per MIL-STD-  
750, method 2026  
•
Steady-State Power: 0.5 watts at end cap  
temperature TEC < 100oC or ambient temperature TA  
< 25ºC when mounted on FR4 PC board as described  
for thermal resistance above (see Figure 2 for  
derating)  
•
POLARITY: Cathode indicated by band where  
diode is to be operated with the banded end positive  
with respect to the opposite end for Zener regulation  
•
•
MARKING: cathode band only  
TAPE & REEL option: Standard per EIA-481-B with  
12 mm tape, 2000 per 7 inch reel or 5000 per 13  
inch reel (add “TR” suffix to part number)  
WEIGHT: 0.04 grams  
•
•
Forward voltage @200 mA: 1.1 volts (maximum)  
Solder Temperatures: 260 ºC for 10 seconds (max)  
•
•
See package dimensions on last page  
Copyright © 2005  
8-29-2005 REV B  
Microsemi  
Page 1  
Scottsdale Division  
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503  
1N5221UR thru 1N5281BUR, e3  
(or MLL5221 thru MLL5281B, e3)  
500 mW GLASS SURFACE MOUNT  
ZENER DIODES  
S C O T T S D A L E D I V I S I O N  
ELECTRICAL CHARACTERISTICS*  
Nominal  
Zener  
Test  
Current  
IZT  
Max Zener Impedance  
Max Reverse Leakage Current  
Max Zener Voltage  
Temperature Coeff.  
(A and B Suffix only)  
(Note 3)  
Voltage  
VZ @ IZT  
(Note 2)  
A and B suffix only  
INDUSTRY  
PART  
NUMBER  
A and B Suffix only  
Non-Suffix  
IR  
μA  
@
VR  
Volts  
B
IR @ VR Used  
for Suffix A  
μA  
200  
200  
150  
150  
100  
100  
100  
75  
(NOTES 1 & 4)  
ZZT @ IZT  
Ohms  
ZZK @ IZK =  
Volts  
mA  
α
VZ (%/oC)  
0.25Ma Ohms  
A
1N5221UR  
1N5222UR  
1N5223UR  
1N5224UR  
1N5225UR  
1N5226UR  
1N5227UR  
1N5228UR  
1N5229UR  
1N5230UR  
1N5231UR  
1N5232UR  
1N5233UR  
1N5234UR  
1N5235UR  
1N5236UR  
1N5237UR  
1N5238UR  
1N5239UR  
1N5240UR  
1N5241UR  
1N5242UR  
1N5243UR  
1N5244UR  
1N5245UR  
1N5246UR  
1N5247UR  
1N5248UR  
1N5249UR  
1N5250UR  
1N5251UR  
1N5252UR  
1N5253UR  
1N5254UR  
1N5255UR  
1N5256UR  
1N5257UR  
1N5258UR  
1N5259UR  
1N5260UR  
1N5261UR  
1N5262UR  
1N5263UR  
1N5264UR  
1N5265UR  
1N5266UR  
1N5267UR  
1N5268UR  
1N5269UR  
1N5270UR  
1N5271UR  
1N5272UR  
1N5273UR  
1N5274UR  
1N5275UR  
1N5276UR  
1N5277UR  
1N5278UR  
1N5279UR  
1N5280UR  
1N5281UR  
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  
82  
87  
91  
100  
110  
120  
130  
140  
150  
160  
170  
180  
190  
200  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
20  
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  
17  
19  
21  
23  
25  
29  
33  
35  
41  
44  
1200  
1250  
1300  
1400  
1600  
1600  
1700  
1900  
2000  
1900  
1600  
1600  
1600  
1000  
750  
500  
500  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
600  
700  
700  
800  
100  
100  
75  
75  
50  
25  
15  
10  
0.95  
0.95  
0.95  
0.95  
0.95  
0.95  
0.95  
0.95  
0.95  
1.9  
1.9  
2.9  
3.3  
3.8  
4.8  
5.7  
6.2  
6.2  
6.7  
7.6  
8.0  
8.7  
9.4  
9.5  
10.5  
11.4  
12.4  
13.3  
13.3  
14.3  
16.2  
17.1  
18.1  
20  
20  
22  
24  
26  
29  
31  
34  
37  
41  
44  
45  
49  
53  
59  
65  
66  
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  
11  
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  
144  
152  
-0.085  
-0.085  
-0.080  
-0.080  
-0.075  
-0.070  
-0.065  
-0.060  
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  
0.1  
0.1  
50  
50  
50  
50  
50  
50  
30  
30  
30  
30  
30  
30  
30  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
10  
+/-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  
+0.098  
+0.099  
+0.099  
+0.0110  
+0.0110  
+0.0110  
+0.0110  
+0.0110  
+0.0110  
+0.0110  
+0.0110  
+0.0110  
+0.0110  
+0.0110  
20  
20  
20  
20  
20  
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  
1.5  
1.4  
1.4  
1.3  
1.1  
1.0  
.95  
.90  
.85  
.80  
.74  
.68  
.66  
.65  
49  
58  
70  
80  
93  
900  
105  
125  
150  
170  
185  
230  
270  
330  
370  
400  
500  
750  
900  
1100  
1300  
1500  
1700  
1900  
2200  
2400  
2500  
1000  
1100  
1300  
1400  
1400  
1600  
1700  
2000  
2200  
2300  
2600  
3000  
4000  
4500  
4500  
5000  
5500  
5500  
6000  
6500  
7000  
72  
80  
86  
94  
101  
108  
116  
123  
130  
137  
144  
10  
10  
10  
10  
10  
* T = 25oC unless otherwise noted. Based on dc measurements at thermal equilibrium; case temperature maintained at 30 +/- 2oC. VF = 1.1V max @ I = 200 mA  
A
F
for all types. See further Notes on following page.  
Copyright © 2005  
8-29-2005 REV B  
Microsemi  
Page 2  
Scottsdale Division  
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503  
1N5221UR thru 1N5281BUR, e3  
(or MLL5221 thru MLL5281B, e3)  
500 mW GLASS SURFACE MOUNT  
ZENER DIODES  
S C O T T S D A L E D I V I S I O N  
NOTE 1: Table as shown lists type numbers, which indicate a tolerance of +/-20% with guaranteed limits on only VZ, IR, and VF. Devices with  
guaranteed limits on all six parameters are indicated by suffix “A” for +/-10%, “B” for +/-5%, “C” for +/-2%, and “D” for +/-1% tolerance.  
NOTE 2: The electrical characteristics are measured after allowing the device to stabilize for 20 seconds.  
NOTE 3: Temperature coefficient (αvz). Test conditions for temperature coefficient are as follows:  
a.  
I
ZT = 7.5 mA, T1 = 25oC,  
T2 = 125oC (1N5221AUR & BUR thru 1N5242AUR & BUR)  
b. IZT = Rated IZT, T1 = 25oC,  
T2 = 125oC (1N5243AUR & BUR thru 1N5281AUR & BUR)  
Device to be temperature stabilized with current applied prior to reading breakdown voltage at the specified ambient temperature.  
NOTE 4: These devices may be ordered as either 1N5221UR thru 1N5281BUR or as MLL5221 thru MLL5281B part numbers.  
GRAPHS  
Voltage Temperature  
Coefficient %/oC  
TEC  
mV Change /ºC  
TA  
TEC – End Cap Temperature (oC), or  
TA Ambient Temperature on FR4 PC BOARD  
NOMINAL ZENER VOLTAGE (VOLTS)  
FIGURE 2  
FIGURE 1  
POWER DERATING CURVE  
ZENER VOLTAGE TEMPERATURE  
COEFFICIENT vs. ZENER VOLTAGE  
PACKAGE DIMENSIONS  
INCHES  
MILLIMETERS  
DIM  
A
B
MIN  
MAX  
0.067  
0.146  
0.022  
MIN  
1.60  
3.30  
0.41  
MAX  
1.70  
3.70  
0.55  
0.063  
0.130  
0.016  
C
INCHES  
mm  
5.08  
1.40  
2.03  
A
B
C
.200  
.055  
.080  
PAD LAYOUT  
FIGURE 3  
CAPACITANCE vs. ZENER VOLTAGE  
(TYPICAL)  
Copyright © 2005  
8-29-2005 REV B  
Microsemi  
Page 3  
Scottsdale Division  
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503