LL5221B~LL5271B
Zener diode
Features
1. High reliability
2. Very sharp reverse characteristi c
3. Low reverse current level
4. VZ-tolerance±5%
Applications
Voltage st abil ization
Absolute Maximum Ratings
Tj=25℃ Parameter Test Conditions Type Symbol Value Unit
Power dissipation Tamb≤75℃ P
V500 mW
Z-current IZPV/VZmA
Junction temperature Tj200 ℃
Storage temperature range Tstg -65~+200 ℃
Maximum Thermal Resistance
Tj=25℃ Parameter Test Conditions Symbol Value Unit
Junction ambient I=9.5mm(3/8”) T L=constant RthJA 300 K/W
Stresses exceeding maximum rati ngs may damage the device. Maximum ratings are stress ratings only. Functional operation above the
recommended operating conditions is not implied. Extended exposure to stresses above the recommended operating conditions may
affect device reliability.
Electrical Characteristics
Tj=25℃ Parameter Test Conditions Type Symbol Min Typ Max Unit
Forward voltage IF=200mA VF 1.1 V
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LL5221B~LL5271B
VZnom1) IZT for r
zjT rzjK at I
ZK IR at V
RTKVZ
Type V mA Ω Ω mA μA V %/K
LL5221B 2.4 20 <30 <1200 0.25 <100 1.0 <-0.085
LL5222B 2.5 20 <30 <1250 0.25 <100 1.0 <-0.085
LL5223B 2.7 20 <30 <1300 0.25 <75 1.0 <-0.080
LL5224B 2.8 20 <30 <1400 0.25 <75 1.0 <-0.080
LL5225B 3.0 20 <29 <1600 0.25 <50 1.0 <-0.075
LL5226B 3.3 20 <28 <1600 0.25 <25 1.0 <-0.070
LL5227B 3.6 20 <24 <1700 0.25 <15 1.0 <-0.065
LL5228B 3.9 20 <23 <1900 0.25 <10 1.0 <-0.060
LL5229B 4.3 20 <22 <2000 0.25 <5 1.0 <+0.055
LL5230B 4.7 20 <19 <1900 0.25 <5 2.0 <+0.030
LL5231B 5.1 20 <17 <1600 0.25 <5 2.0 <+0.030
LL5232B 5.6 20 <11 <1600 0.25 <5 3.0 <+0.038
LL5233B 6.0 20 <7 <1600 0.25 <5 3.5 <+0.038
LL5234B 6.2 20 <7 <1000 0.25 <5 4.0 <+0.045
LL5235B 6.8 20 <5 <750 0.25 <3 5.0 <+0.050
LL5236B 7.5 20 <6 <500 0.25 <3 6.0 <+0.058
LL5237B 8.2 20 <8 <500 0.25 <3 6.5 <+0.062
LL5238B 8.7 20 <8 <600 0.25 <3 6.5 <+0.065
LL5239B 9.1 20 <10 <600 0.25 <3 7.0 <+0.068
LL5240B 10 20 <17 <600 0.25 <3 8.0 <+0.075
LL5241B 11 20 <22 <600 0.25 <2 8.4 <+0.076
LL5242B 12 20 <30 <600 0.25 <1 9.1 <+0.077
LL5243B 13 9.5 <13 <600 0.25 <0.5 9.9 <+0.079
LL5244B 14 9.0 <15 <600 0.25 <0.1 10 <+0.082
LL5245B 15 8.5 <16 <600 0.25 <0.1 11 <+0.082
LL5246B 16 7.8 <17 <600 0.25 <0.1 12 <+0.083
LL5247B 17 7.4 <19 <600 0.25 <0.1 13 <+0.084
LL5248B 18 7.0 <21 <600 0.25 <0.1 14 <+0.085
LL5249B 19 6.6 <23 <600 0.25 <0.1 15 <+0.086
LL5250B 20 6.2 <25 <600 0.25 <0.1 16 <+0.086
LL5251B 22 5.6 <29 <600 0.25 <0.1 17 <+0.087
LL5252B 24 5.2 <33 <600 0.25 <0.1 18 <+0.088
LL5253B 25 5.0 <35 <600 0.25 <0.1 19 <+0.089
LL5254B 27 4.6 <41 <600 0.25 <0.1 21 <+0.090
LL5255B 28 4.5 <44 <600 0.25 <0.1 21 <+0.091
LL5256B 30 4.2 <49 <600 0.25 <0.1 23 <+0.091
LL5257B 33 3.8 <58 <700 0.25 <0.1 25 <+0.092
LL5258B 36 3.4 <70 <700 0.25 <0.1 27 <+0.093
LL5259B 39 3.2 <80 <800 0.25 <0.1 30 <+0.094
LL5260B 43 3.0 <93 <900 0.25 <0.1 33 <+0.095
LL5261B 47 2.7 <105 <1000 0.25 <0.1 36 <+0.095
LL5262B 51 2.5 <125 <1100 0.25 <0.1 39 <+0.096
LL5263B 56 2.2 <150 <1300 0.25 <0.1 43 <+0.096
LL5264B 60 2.1 <170 <1400 0.25 <0.1 46 <+0.097
LL5265B 62 2.0 <185 <1400 0.25 <0.1 47 <+0.097
LL5266B 68 1.8 <230 <1600 0.25 <0.1 52 <+0.097
LL5267B 75 1.7 <270 <1700 0.25 <0.1 58 <+0.098
LL5268B 82 1.5 <330 <2000 0.25 <0.1 62 <+0.098
LL5269B 87 1.4 <370 <2200 0.25 <0.1 68 <+0.099
LL5270B 91 1.4 <400 <2300 0.25 <0.1 69 <+0.099
LL5271B 100 1.3 <500 <2600 0.25 <0.1 76 <+0.11
1) Based on DC-measurement at thermal equilibrium while maintaining the lead temperature(TL) at 30℃,
9.5mm (3/8”) from the diode body.
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LL5221B~LL5271B
Characteristics (Tj=25℃ unless otherwise specified)
Figure 1. Zener Voltage versus Zener Current – Vz=1 thru 16 Volts
Figure 2. Zener Voltage versus Zener Current – Vz=15 thru 30 Volts
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LL5221B~LL5271B
Figure 3. Zener Voltage versus Zener Current – Vz=30 thru 75 Volts
Figure 4. Thermal resistance from junction to ambient as a function of pulse duration
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LL5221B~LL5271B
Dimensions in mm
Glass Case
Mini Melf / SOD-80
JEDEC DO-213 AA
Cathode identification
Φ1.5±0.1
0.3
3.5±0.2
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