LL55C Series
Zener diode
Features
1. Small surface mounting type
2. High reliability
Applications
Voltage stabilization
Construction
Silicon epitaxial planar
Absolute Maximum Ratings
Tj=25℃
Parameter Test Conditions Type Symbol Value Unit
Power dissipation RthJA≦300K/W PV 500 mW
Z-current IZ PV/VZ mA
Junction temperature Tj 175 ℃
Storage temperature range Tstg -65~+175 ℃
Maximum Thermal Resistance
Tj=25℃
Parameter Test Conditions Symbol Value Unit
Junction ambient on PC board 50mm×50mm×1.6mm RthJA 500 K/W
Electrical Characteristics
Tj=25℃
Parameter Test Conditions Type Symbol Min Typ Max Unit
Forward voltage IF=200mA VF 1.5 V
LL55C Series
Type VZnom IZT for V
ZT and rzjT rzjK at I
ZK IR and IR at VR TKVZ
LL55C. V mA V1) Ω Ω mA μA μA2) V %/K
2V0 2.0 5 1.9~2.1 100 <600 1 <150 <300 1 -0.09~-0.06
2V2 2.2 5 2.09~2.31 100 <600 1 <150 <300 1 -0.09~-0.06
2V4 2.4 5 2.28~2.56 <85 <600 1 <50 <100 1 -0.09~-0.06
2V7 2.7 5 2.5~2.9 <85 <600 1 <10 <50 1 -0.09~-0.06
3V0 3.0 5 2.8~3.2 <85 <600 1 <4 <40 1 -0.08~-0.05
3V3 3.3 5 3.1~3.5 <85 <600 1 <2 <40 1 -0.08~-0.05
3V6 3.6 5 3.4~3.8 <85 <600 1 <2 <40 1 -0.08~-0.05
3V9 3.9 5 3.7~4.1 <85 <600 1 <2 <40 1 -0.08~-0.05
4V3 4.3 5 4.0~4.6 <75 <600 1 <1 <20 1 -0.06~-0.03
4V7 4.7 5 4.4~5.0 <60 <600 1 <0.5 <10 1 -0.05~+0.02
5V1 5.1 5 4.8~5.4 <35 <550 1 <0.1 <2 1 -0.02~+0.02
5V6 5.6 5 5.2~6.0 <25 <450 1 <0.1 <2 1 -0.05~+0.05
6V2 6.2 5 5.8~6.6 <10 <200 1 <0.1 <2 2 0.03~0.06
6V8 6.8 5 6.4~7.2 <8 <150 1 <0.1 <2 3 0.03~0.07
7V5 7.5 5 7.0~7.9 <7 <50 1 <0.1 <2 5 0.03~0.07
8V2 8.2 5 7.7~8.7 <7 <50 1 <0.1 <2 6.2 0.03~0.08
9V1 9.1 5 8.5~9.6 <10 <50 1 <0.1 <2 6.8 0.03~0.09
10 10 5 9.4~10.6 <15 <70 1 <0.1 <2 7.5 0.03~0.1
11 11 5 10.4~11.6 <20 <70 1 <0.1 <2 8.2 0.03~0.11
12 12 5 11.4~12.7 <20 <90 1 <0.1 <2 9.1 0.03~0.11
13 13 5 12.4~14.1 <26 <110 1 <0.1 <2 10 0.03~0.11
15 15 5 13.8~15.6 <30 <110 1 <0.1 <2 11 0.03~0.11
16 16 5 15.3~17.1 <40 <170 1 <0.1 <2 12 0.03~0.11
18 18 5 16.8~19.1 <50 <170 1 <0.1 <2 13 0.03~0.11
20 20 5 18.8~21.2 <55 <220 1 <0.1 <2 15 0.03~0.11
22 22 5 20.8~23.3 <55 <220 1 <0.1 <2 16 0.04~0.12
24 24 5 22.8~25.6 <80 <220 1 <0.1 <2 18 0.04~0.12
27 27 5 25.1~28.9 <80 <220 1 <0.1 <2 20 0.04~0.12
30 30 5 28~32 <80 <220 1 <0.1 <2 22 0.04~0.12
33 33 5 31~35 <80 <220 1 <0.1 <2 24 0.04~0.12
36 36 5 34~38 <80 <220 1 <0.1 <2 27 0.04~0.12
39 39 2.5 37~41 <90 <500 0.5 <0.1 <5 30 0.04~0.12
43 43 2.5 40~46 <90 <600 0.5 <0.1 <5 33 0.04~0.12
47 47 2.5 44~50 <110 <700 0.5 <0.1 <5 36 0.04~0.12
51 51 2.5 48~54 <125 <700 0.5 <0.1 <10 39 0.04~0.12
56 56 2.5 52~60 <135 <1000 0.5 <0.1 <10 43 0.04~0.12
62 62 2.5 58~66 <150 <1000 0.5 <0.1 <10 47 0.04~0.12
68 68 2.5 64~72 <200 <1000 0.5 <0.1 <10 51 0.04~0.12
75 75 2.5 70~79 <250 <1500 0.5 <0.1 <10 56 0.04~0.12
1) Tighter tolerances available request:
LL55B… ±2% of VZnom
2) at Tj=150℃
LL55C Series
Characteristics (Tj=25℃ unless otherwise specified)
Figure 1. Total Power Dissipation vs. Ambient
Temperature
Figure 4. Typical Change of Working Voltage Vs.
Junction Temperature
Figure 2. Typical Change of Working Voltage under
Operating Conditions at Tamb=25℃
Figure 5. Temperature Coefficient of Vz vs. Z-Voltage
Figure 3. Diode Capacitance vs. Z-voltage
LL55C Series
Figure 6. Forward Current vs. Forward Voltage Figure 8. Z-Current vs. Z-Voltage
Figure 7. Z-Current vs. Z-Voltage Figure 9. Differential Z-Resistance Vz vs. Z-Voltage
Figure 10. Thermal Response
LL55C Series
Dimensions in mm
Cathode identification
Φ1.5±0.1
0.3
3.5±0.2
Glass Case
Mini Melf / SOD 80
JEDEC DO 213 AA
